Dr. Ji Wang Profile

Dr. Ji Wang

Assistant Professor at Ohio State Univ

SPIE Involvement:

Author

Publications (31)

Proceedings Article | 28 August 2024 Poster + Paper

Dual-aperture fiber nulling for high spatial and spectral resolution studies of exoplanets

Anusha Pai Asnodkar, Ji Wang, Colby Jurgenson, Jonathan Crass

Proceedings Volume 13095, 130952J (2024) https://doi.org/10.1117/12.3019099

KEYWORDS: Planets, Nulling interferometry, Single mode fibers, Spectroscopy, Exoplanets, Optical alignment, Optical testing

Read Abstract +

Proceedings Article | 18 July 2024 Presentation + Paper

The high-contrast performance of the Keck Planet Imager and Characterizer

Jason Wang, Dimitri Mawet, Jerry Xuan, Chih-Chun Hsu, Jean-Baptiste Ruffio, Katelyn Horstman, Yinzi Xin, Jacques-Robert Delorme, Nemanja Jovanovic, Yapeng Zhang, Luke Finnerty, Ashley Baker, Randall Bartos, Geoffrey Blake, Benjamin Calvin, Sylvain Cetre, Gregory Doppmann, Daniel Echeverri, Michael Fitzgerald, Joshua Liberman, Ronald Lopez, Evan Morris, Jacklyn Pezzato-Rovner, Ben Sappey, Tobias Schofield, Andrew Skemer, J. Kent Wallace, Ji Wang

Proceedings Volume 13096, 130961X (2024) https://doi.org/10.1117/12.3019114

KEYWORDS: Stars, Speckle, Planets, Spectrographs, Signal to noise ratio, Sensors, K band, Imaging systems, Adaptive optics, Coronagraphy

Read Abstract +

Proceedings Article | 18 July 2024 Poster + Paper

Fringing analysis and forward modeling of Keck Planet Imager and Characterizer (KPIC) spectra

Katelyn Horstman, Jean-Baptiste Ruffio, Jason Wang, Chih-Chun Hsu, Ashley Baker, Luke Finnerty, Jerry Xuan, Daniel Echeverri, Dimitri Mawet, Geoffrey Blake, Randall Bartos, Charlotte Bond, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Greg Doppmann, Michael Fitzgerald, Nemanja Jovanovic, Ronald Lopez, Emily Martin, Evan Morris, Jacklyn Pezzato, Garreth Ruane, Ben Sappey, Tobias Schofield, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Ji Wang, Peter Wizinowich

Proceedings Volume 13096, 130962E (2024) https://doi.org/10.1117/12.3018020

KEYWORDS: Data modeling, Stars, Geometrical optics, Calibration, Modeling, Spectral models, Planets, Observational astronomy, Imaging systems

Read Abstract +

Proceedings Article | 5 October 2023 Presentation + Paper

The development of HISPEC for Keck and MODHIS for TMT: science cases and predicted sensitivities

Quinn Konopacky, Ashley Baker, Dimitri Mawet, Michael Fitzgerald, Nemanja Jovanovic, Charles Beichman, Garreth Ruane, Rob Bertz, Hiroshi Terada, Richard Dekany, Larry Lingvay, Marc Kassis, David Anderson, Motohide Tamura, Björn Benneke, Thomas Beatty, Tuan Do, Shogo Nishiyama, Peter Plavchan, Jason Wang, Ji Wang, Adam Burgasser, Jean-Baptiste Ruffio, Huihao Zhang, Aaron Brown, Jason Fucik, Aidan Gibbs, Rose Gibson, Sam Halverson, Christopher Johnson, Sonia Karkar, Takayuki Kotani, Evan Kress, Stephanie Leifer, Kenneth Magnone, Jerome Maire, Rishi Pahuja, Michael Porter, Mitsuko Roberts, Ben Sappey, Jim Thorne, Eric Wang, Etienne Artigau, Geoffrey Blake, Gabriela Canalizo, Guo Chen, Greg Doppmann, René Doyon, Courtney Dressing, Min Fang, Thomas Greene, Greg Herczeg, Lynne Hillenbrand, Andrew Howard, Stephen Kane, Tiffany Kataria, Eliza Kempton, Heather Knutson, David Lafrenière, Chao Liu, Stanimir Metchev, Max Millar-Blanchaer, Norio Narita, Gajendra Pandey, S.P. Rajaguru, Paul Robertson, Colette Salyk, Bun'ei Sato, Evertt Schlawin, Sujan Sengupta, Thirupathi Sivarani, Warren Skidmore, Gautam Vasisht, Chikako Yasui, Hui Zhang

Proceedings Volume 12680, 1268007 (2023) https://doi.org/10.1117/12.2681522

KEYWORDS: Planets, Stars, Exoplanets, Spectrographs, Atmospheres, Spectroscopy, Telescopes

Read Abstract +

SPIE Journal Paper | 12 September 2023

Vortex fiber nulling for exoplanet observations: implementation and first light

Daniel Echeverri, Jerry Xuan, Nemanja Jovanovic, Garreth Ruane, Jacques-Robert Delorme, Dimitri Mawet, Bertrand Mennesson, Eugene Serabyn, J. Kent Wallace, Jason Wang, Jean-Baptiste Ruffio, Luke Finnerty, Yinzi Xin, Maxwell Millar-Blanchaer, Ashley Baker, Randall Bartos, Benjamin Calvin, Sylvain Cetre, Greg Doppmann, Michael Fitzgerald, Sofia Hillman, Katelyn Horstman, Chih-Chun Hsu, Joshua Liberman, Ronald Lopez, Evan Morris, Jacklyn Pezzato, Caprice Phillips, Bin Ren, Ben Sappey, Tobias Schofield, Andrew Skemer, Connor Vancil, Ji Wang

JATIS, Vol. 9, Issue 03, 035002, (September 2023) https://doi.org/10.1117/12.10.1117/1.JATIS.9.3.035002

KEYWORDS: Stars, Equipment, Exoplanets, Planets, Single mode fibers, Point spread functions, K band, Nulling interferometry, Wavefront aberrations, Calibration

Read Abstract +

Proceedings Article | 30 August 2022 Poster + Paper

An updated preliminary optical design and performance analysis of the Planetary Systems Imager adaptive optics system

Rebecca Jensen-Clem, Philip Hinz, M. A. van Kooten, Michael Fitzgerald, Steph Sallum, Benjamin Mazin, Mark Chun, Maxwell Millar-Blanchaer, Andy Skemer, Ji Wang, R. Deno Stelter, Olivier Guyon

Proceedings Volume 12185, 1218546 (2022) https://doi.org/10.1117/12.2630526

KEYWORDS: Adaptive optics, Actuators, Wavefronts, Imaging systems, Optical design, Coronagraphy, Wavefront sensors, Planetary systems, Atmospheric propagation, Wave propagation

Read Abstract +

Proceedings Article | 29 August 2022 Presentation + Paper

Fiber-fed high-resolution infrared spectroscopy at the diffraction limit with Keck-HISPEC and TMT-MODHIS: status update

Dimitri Mawet, Michael Fitzgerald, Quinn Konopacky, Nemanja Jovanovic, Ashley Baker, Charles Beichman, Rob Bertz, Richard Dekany, Jason Fucik, Mitsuko Roberts, Michael Porter, Rishi Pahuja, Garreth Ruane, Stephanie Leifer, Samuel Halverson, Aidan Gibbs, Chris Johnson, Evan Kress, Kenneth Magnone, Ji Man Sohn, Eric Wang, Aaron Brown, Jerome Maire, Ben Sappey, David Andersen, Hiroshi Terada, Marc Kassis, Etienne Artigau, Bjorn Benneke, Rene Doyon, Takayuki Kotani, Motohide Tamura, Thomas Beatty, Peter Plavchan, Tuan Do, Shogo Nishiyama, Jason Wang, Ji Wang

Proceedings Volume 12184, 121841R (2022) https://doi.org/10.1117/12.2630142

KEYWORDS: Planets, Exoplanets, Stars, Spectrographs, Spectroscopy, Spectral resolution, Adaptive optics, Single mode fibers, Infrared spectroscopy, Telescopes

Read Abstract +

Proceedings Article | 29 August 2022 Presentation + Paper

Phase II of the Keck Planet Imager and characterizer: system-level laboratory characterization and preliminary on-sky commissioning

Daniel Echeverri, Nemanja Jovanovic, Jacques-Robert Delorme, Yinzi Xin, Tobias Schofield, Luke Finnerty, Jason Wang, Jerry Xuan, Dimitri Mawet, Ashley Baker, Randall Bartos, Charlotte Bond, Marta Bryan, Benjamin Calvin, Sylvain Cetre, Greg Doppmann, Michael Fitzgerald, Jason Fucik, Katelyn Horstman, Ronald Lopez, Emily Martin, Stefan Martin, Bertrand Mennesson, Evan Morris, Reston Nash, Jackie Pezzato, Michael Porter, Sam Ragland, Mitsuko Roberts, Garreth Ruane, Jean-Baptiste Ruffio, Ben Sappey, Eugene Serabyn, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Ji Wang, Peter Wizinowich

Proceedings Volume 12184, 121841W (2022) https://doi.org/10.1117/12.2630518

KEYWORDS: Adaptive optics, Calibration, Coronagraphy, Point spread functions, Imaging systems, Single mode fibers, Planets, Photodetectors

Read Abstract +

Proceedings Article | 29 August 2022 Poster + Paper

On-sky performance and lessons learned from the phase I KPIC fiber injection unit

Luke Finnerty, Tobias Schofield, Jacques-Robert Delorme, Ben Sappey, Jason J. Wang, Jean-Baptiste Ruffio, Dimitri Mawet, Michael Fitzgerald, Nemanja Jovanovic, Ashley Baker, Randall Bartos, Charlotte Bond, Marta Bryan, Benjamin Calvin, Sylvain Cetre, Greg Doppmann, Daniel Echeverri, Ronald Lopez, Emily Martin, Evan Morris, Jacklyn Pezzato, Sam Ragland, Garreth Ruane, Andrew Skemer, Taylor Venenciano, J. Kent Wallace, Ji Wang, Peter Wizinowich, Jerry Xuan

Proceedings Volume 12184, 121844Y (2022) https://doi.org/10.1117/12.2630276

KEYWORDS: Calibration, Fiber science, Adaptive optics, K band, Spectroscopy, Cameras, Mirrors, Spectrographs, Single mode fibers, Light sources

Read Abstract +

Proceedings Article | 9 September 2021 Presentation + Paper

The Planetary Systems Imager adaptive optics system: an initial optical design and performance analysis tool for the PSI-Red AO system

Rebecca Jensen-Clem, Philip Hinz, Maaike von Kooten, Michael Fitzgerald, Steph Sallum, Benjamin Mazin, Mark Chun, Claire Max, Maxwell Millar-Blanchaer, Olivier Guyon, Andrew Skemer, R. Deno Stelter, Ji Wang

Proceedings Volume 11823, 1182309 (2021) https://doi.org/10.1117/12.2594005

KEYWORDS: Adaptive optics, Wavefront sensors, Relays, Wavefronts, Mirrors, Telescopes, Coronagraphy, Actuators, Imaging systems, Optical design

Read Abstract +

Proceedings Article | 9 September 2019 Presentation

The Keck Planet Imager and Characterizer: demonstrating advanced exoplanet characterization techniques for future extremely large telescopes (Conference Presentation)

Nemanja Jovanovic, Jacques-Robert Delorme, Charlotte Bond, Sylvain Cetre, Dimitri Mawet, Daniel Echeverri, James Wallace, Randy Bartos, Scott Lilley, Sam Ragland, Garreth Ruane, Peter Wizinowich, Mark Chun, Ji Wang, Jason Wang, Michael Fitzgerald, Jacklyn Pezzato, Keith Matthews, Ben Calvin, Maxwell Millar-Blanchaer, Emily Martin, Edward Wetherell, Eric Wang, Shane Jacobson, Eric Warmbier, Charles Lockhart, Don Hall, Rebecca Jensen-Clem, Eden McEwen

Proceedings Volume 11117, 111170T (2019) https://doi.org/10.1117/12.2529330

KEYWORDS: Exoplanets, Imaging systems, Planets, Large telescopes, Imaging spectroscopy, Infrared imaging, Infrared radiation, Spectroscopes, Adaptive optics, Mid-IR

Read Abstract +

Proceedings Article | 21 August 2018 Paper

Effects of thermal and exozodiacal background on space telescope observations of exoEarths

Carl Coker, Ji Wang, Stuart Shaklan

Proceedings Volume 10698, 106985G (2018) https://doi.org/10.1117/12.2313695

KEYWORDS: Spectral resolution, Signal to noise ratio, Telescopes, Thermal effects, Oxygen, Planets, Space telescopes, Coronagraphy, Methane

Read Abstract +

Proceedings Article | 27 July 2018 Paper

High-contrast imaging of tight resolved binaries with two vector vortex coronagraphs in cascade with the Palomar SDC instrument

Jonas Kühn, Sebastian Daemgen, Ji Wang, Farisa Morales, Michael Bottom, Eugene Serabyn, Jean Shelton, Jacques-Robert Delorme, Samaporn Tinyanont

Proceedings Volume 10702, 1070242 (2018) https://doi.org/10.1117/12.2313448

KEYWORDS: Stars, Coronagraphy, Adaptive optics, Imaging systems, Planets, Binary data, Telescopes, Point spread functions, Calibration, Principal component analysis

Read Abstract +

Proceedings Article | 16 July 2018 Paper

The planetary systems imager: 2-5 micron channel

Andrew Skemer, Deno Stelter, Dimitri Mawet, Michael Fitzgerald, Benjamin Mazin, Olivier Guyon, Christian Marois, Zackery Briesemeister, Timothy Brandt, Jeffrey Chilcote, Jacques-Robert Delorme, Nemanja Jovanovic, Jessica Lu, Maxwell Millar-Blanchaer, James Wallace, Gautam Vasisht, Lewis Roberts, Ji Wang

Proceedings Volume 10702, 10702A5 (2018) https://doi.org/10.1117/12.2314173

KEYWORDS: Exoplanets, Planets, Imaging systems, Adaptive optics, Imaging spectroscopy, Planetary systems, Spectrographs, Coronagraphy, Infrared imaging

Read Abstract +

Proceedings Article | 10 July 2018 Presentation

Simulating high dispersion coronagraphy (HDC) observations for large ground-based telescopes (Conference Presentation)

Ji Wang, Dimitri Mawet

Proceedings Volume 10703, 107031R (2018) https://doi.org/10.1117/12.2312387

KEYWORDS: Coronagraphy, Telescopes, Planets, Spectroscopy, Adaptive optics, Exoplanets, Stars, Large telescopes, Single mode fibers, Optical filters

Read Abstract +

Proceedings Article | 9 July 2018 Paper

High-contrast spectroscopy testbed for Segmented Telescopes: instrument overview and development progress

N. Jovanovic, G. Ruane, D. Echeverri, J. R. Delorme, D. Mawet, J. Fucik, J. Wallace, C. Coker, A. Delacroix, N. Levraud, J. Llop Sayson, J. Wang, R. Riddle, M. Millar-Blanchaer

Proceedings Volume 10702, 107024E (2018) https://doi.org/10.1117/12.2314325

KEYWORDS: Coronagraphy, Wavefront sensors, Space telescopes, Telescopes, Point spread functions, Mirrors, Exoplanets, Wavefronts, Stars, Computer aided design

Read Abstract +

SPIE Journal Paper | 6 July 2018 Open Access

Baseline requirements for detecting biosignatures with the HabEx and LUVOIR mission concepts

Ji Wang, Dimitri Mawet, Renyu Hu, Garreth Ruane, Jacques-Robert Delorme, Nikita Klimovich

JATIS, Vol. 4, Issue 03, 035001, (July 2018) https://doi.org/10.1117/12.10.1117/1.JATIS.4.3.035001

KEYWORDS: Spectral resolution, Molecules, Clouds, Speckle, Carbon monoxide, Colorimetry, Gases, Exoplanets, Absorption, Planets

Read Abstract +

DOWNLOAD PAPER

Proceedings Article | 22 January 2018 Presentation + Paper

High-contrast spectroscopy testbed for segmented telescopes

J. R. Delorme, D. Mawet, J. Fucik, J. Wallace, G. Ruane, N. Jovanovic, N. Klimovich, J. D. Llop Sayson, R. Zhang, Y. Xin, R. Riddle, R. Dekany, J. Wang, E. Choquet, W. Xuan, D. Echeverri, M. Randolph, G. Vasisht, B. Mennesson

Proceedings Volume 10400, 104000X (2018) https://doi.org/10.1117/12.2274893

KEYWORDS: Space telescopes, Telescopes, Device simulation, Image segmentation, Coronagraphy, Planets, Adaptive optics, Mirrors, Deformable mirrors, Wavefront sensors

Read Abstract +

Proceedings Article | 13 September 2017 Presentation + Paper

The LUVOIR architecture "A" coronagraph instrument

L. Pueyo, N. Zimmerman, M. Bolcar, T. Groff, C. Stark, G. Ruane, J. Jewell, R. Soummer, K. St. Laurent, J. Wang, D. Redding, J. Mazoyer, K. Fogarty, Roser Juanola-Parramon, S. Domagal-Goldman, A. Roberge, O. Guyon, A. Mandell

Proceedings Volume 10398, 103980F (2017) https://doi.org/10.1117/12.2274654

KEYWORDS: Coronagraphy, Wavefronts, Sensors, Planets, Channel projecting optics, Wavefront sensors, Stars, Imaging systems, Mirrors, Telescopes

Read Abstract +

In preparation for the Astro 2020 Decadal Survey NASA has commissioned the study four flagship missions spanning to a wide range of observable wavelengths: the Origins Space Telescope (OST, formerly the Far-Infrared Surveyor), Lynx (formerly the X-ray Surveyor), the Large UV/Optical/Infrared Surveyor (LUVOIR) and the Habitable Exoplanet Imager (HabEx). One of the key scientific objectives of the latter two is the detection and characterization of the earth-like planets around nearby stars using the direct imaging technique (along with a broad range of investigations regarding the architecture of and atmospheric composition exoplanetary systems using this technique). As a consequence dedicated exoplanet instruments are being studied for these mission concepts. This paper discusses the design of the coronagraph instrument for the architecture “A” (15 meters aperture) of LUVOIR. The material presented in this paper is aimed at providing an overview of the LUVOIR coronagraph instrument. It is the result of four months of discussions with various community stakeholders (scientists and technologists) regarding the instrument’s basic parameters followed by meticulous design work by the the GSFC Instrument Design Laboratory team. In the first section we review the main science drivers, presents the overall parameters of the instrument (general architecture and backend instrument) and delve into the details of the currently envisioned coronagraph masks along with a description of the wavefront control architecture. Throughout the manuscript we describe the trades we made during the design process. Because the vocation of this study is to provide a baseline design for the most ambitious earth-like finding instrument that could be possibly launched into the 2030’s, we have designed an complex system privileged that meets the ambitious science goals out team was chartered by the LUVOIR STDT exoplanet Working Group. However in an effort to minimize technological risk we tried to maximize the number of technologies that will be matured by the WFIRST coronagraph instruments.

Proceedings Article | 1 September 2017 Paper

A fiber injection unit for the Keck Planet Imager and Characterizer

D. Mawet, J. R. Delorme, N. Jovanovic, J. Wallace, R. Bartos, P. Wizinowich, M. Fitzgerald, S. Lilley, G. Ruane, J. Wang, N. Klimovich, Y. Xin

Proceedings Volume 10400, 1040029 (2017) https://doi.org/10.1117/12.2274891

KEYWORDS: Planets, Coronagraphy, Imaging systems, Cameras, Exoplanets, Mirrors, Relays, Sensors, Spectrographs, Stars

Read Abstract +

Proceedings Article | 1 September 2017 Presentation + Paper

Baseline requirements for detecting biosignatures with the HabEx and LUVOIR mission concepts

Ji Wang, Dimitri Mawet, Garreth Ruane, Jacques-Robert Delorme, Nikita Klimovich, Renyu Hu

Proceedings Volume 10400, 104000Z (2017) https://doi.org/10.1117/12.2275222

KEYWORDS: Spectral resolution, Molecules, Planets, Carbon monoxide, Gases, Signal to noise ratio, Exoplanets, Telescopes, Stars, Coronagraphy

Read Abstract +

Proceedings Article | 1 September 2017 Presentation + Paper

Utilizing active single-mode fiber injection for speckle nulling in exoplanet characterization

N. Klimovich, Y. Xin, D. Mawet, G. Ruane, J.-R. Delorme, W. Xuan, D. Echeverri, M. Randolph, J. Fucik, J. Wallace, J. Wang, G. Vasisht, R. Dekany, B. Mennesson, E. Choquet, E. Serabyn

Proceedings Volume 10400, 104000Y (2017) https://doi.org/10.1117/12.2275173

KEYWORDS: Speckle, Single mode fibers, Planets, Exoplanets, Coronagraphy, Adaptive optics, Spectrographs, Telescopes, Imaging systems, Sensors

Read Abstract +

Proceedings Article | 18 August 2016 Paper

High-contrast imaging and high-resolution spectroscopy observation of exoplanets

Ji Wang, Dimitri Mawet, Renyu Hu, Björn Benneke

Proceedings Volume 9911, 99112T (2016) https://doi.org/10.1117/12.2235216

KEYWORDS: Exoplanets, Imaging spectroscopy, Human-computer interaction, Stars, Planets, Signal to noise ratio, Signal attenuation, Device simulation, Coronagraphy, Spectrographs

Read Abstract +

Proceedings Article | 26 July 2016 Paper

Keck Planet Imager and Characterizer: concept and phased implementation

D. Mawet, P. Wizinowich, R. Dekany, M. Chun, D. Hall, S. Cetre, O. Guyon, J. Wallace, B. Bowler, M. Liu, G. Ruane, E. Serabyn, R. Bartos, J. Wang, G. Vasisht, M. Fitzgerald, A. Skemer, M. Ireland, J. Fucik, J. Fortney, I. Crossfield, R. Hu, B. Benneke

Proceedings Volume 9909, 99090D (2016) https://doi.org/10.1117/12.2233658

KEYWORDS: Infrared imaging, Planets, Adaptive optics, Imaging systems, Wavefront sensors, Stars, Coronagraphy, Exoplanets, L band, Telescopes

Read Abstract +

Proceedings Article | 24 September 2012 Paper

Design and performance of a new generation, compact, low cost, very high Doppler precision and resolution optical spectrograph

Jian Ge, Bo Zhao, Scott Powell, Ji Wang, Adam Fletcher, Liang Chang, John Groot, Xiaoke Wan, Hali Jakeman, Derek Myers, Elliot Grafer, Jian Liu, Frank Varosi, Sidney Schofield, Alexandria Moore, Maria-Ines van Olphen, Jordan Katz, Rory Barnes

Proceedings Volume 8446, 84468R (2012) https://doi.org/10.1117/12.925795

KEYWORDS: Planets, Stars, Doppler effect, Telescopes, Calibration, Spectrographs, Sensors, Exoplanets, Spectral resolution, Photons

Read Abstract +

Proceedings Article | 24 September 2012 Paper

High resolution Florida IR silicon immersion grating spectrometer and an M dwarf planet survey

Jian Ge, Scott Powell, Bo Zhao, Ji Wang, Adam Fletcher, Sidney Schofield, Jian Liu, Matthew Muterspaugh, Cullen Blake, Rory Barnes

Proceedings Volume 8446, 84463O (2012) https://doi.org/10.1117/12.925788

KEYWORDS: Planets, Stars, Near infrared, Calibration, Infrared spectroscopy, Spectrographs, Silicon, Sensors, Telescopes, Exoplanets

Read Abstract +

We report the system design and predicted performance of the Florida IR Silicon immersion grating spectromeTer (FIRST). This new generation cryogenic IR spectrograph offers broad-band high resolution IR spectroscopy with R=72,000 at 1.4-1.8 μm and R=60,000 at 0.8-1.35 μm in a single exposure with a 2kx2k H2RG IR array. It is enabled by a compact design using an extremely high dispersion silicon immersion grating (SIG) and an R4 echelle with a 50 mm diameter pupil in combination with an Image Slicer. This instrument is operated in vacuum with temperature precisely controlled to reach long term stability for high precision radial velocity (RV) measurements of nearby stars, especially M dwarfs and young stars. The primary technical goal is to reach better than 4 m/s long term RV precision with J<9 M dwarfs within 30 min exposures. This instrument is scheduled to be commissioned at the Tennessee State University (TSU) 2-m Automatic Spectroscopic Telescope (AST) at Fairborn Observatory in spring 2013. FIRST can also be used for observing transiting planets, young stellar objects (YSOs), magnetic fields, binaries, brown dwarfs (BDs), ISM and stars. We plan to launch the FIRST NIR M dwarf planet survey in 2014 after FIRST is commissioned at the AST. This NIR M dwarf survey is the first large-scale NIR high precision Doppler survey dedicated to detecting and characterizing planets around 215 nearby M dwarfs with J< 10. Our primary science goal is to look for habitable Super-Earths around the late M dwarfs and also to identify transiting systems for follow-up observations with JWST to measure the planetary atmospheric compositions and study their habitability. Our secondary science goal is to detect and characterize a large number of planets around M dwarfs to understand the statistics of planet populations around these low mass stars and constrain planet formation and evolution models. Our survey baseline is expected to detect ~30 exoplanets, including 10 Super Earths, within 100 day periods. About half of the Super-Earths are in their habitable zones and one of them may be a transiting planet. The AST, with its robotic control and ease of switching between instruments (in seconds), enables great flexibility and efficiency, and enables an optimal strategy, in terms of schedule and cadence, for this NIR M dwarf planet survey.

Proceedings Article | 22 July 2010 Paper

Development of Monolithic Michelson Interferometer for RV measurement in IR

Ji Wang, Xiaoke Wan, Jian Ge

Proceedings Volume 7734, 77343Q (2010) https://doi.org/10.1117/12.857255

KEYWORDS: Interferometers, Calibration, Doppler effect, Velocity measurements, Precision calibration, Sensors, Interferometry, Temperature metrology, Thermography, Mirrors

Read Abstract +

Proceedings Article | 21 July 2010 Paper

Design of a near-IR Doppler instrument for planet searches

Bo Zhao, Jian Ge, Duy Cuong Nguyen, Ji Wang, John Groot

Proceedings Volume 7735, 773554 (2010) https://doi.org/10.1117/12.857047

KEYWORDS: Doppler effect, Telescopes, Planets, Cameras, Spectrographs, Collimation, Collimators, Silicon, Mirrors, Near infrared

Read Abstract +

Proceedings Article | 15 July 2010 Paper

Design, performance, and early results from extremely high Doppler precision instruments in a global network

Jian Ge, Bo Zhao, John Groot, Liang Chang, Frank Varosi, Xiaoke Wan, Scott Powell, Peng Jiang, Kevin Hanna, Ji Wang, Rohan Pais, Jian Liu, Liming Dou, Sidney Schofield, Shaun McDowell, Erin Costello, Adriana Delgado-Navarro, Scott Fleming, Brian Lee, Sandeep Bollampally, Troy Bosman, Hali Jakeman, Adam Fletcher, Gabriel Marquez

Proceedings Volume 7735, 77350H (2010) https://doi.org/10.1117/12.857366

KEYWORDS: Planets, Telescopes, Doppler effect, Stars, Calibration, Spectrographs, Sensors, Spectral resolution, Interferometers, Iodine

Read Abstract +

Proceedings Article | 10 September 2009 Paper

Monolithic interferometer for high precision radial velocity measurements

Xiaoke Wan, Jian Ge, Ji Wang, Brian Lee

Proceedings Volume 7424, 742406 (2009) https://doi.org/10.1117/12.825747

KEYWORDS: Interferometers, Phase shifts, Beam splitters, Calibration, Velocity measurements, Mirrors, Michelson interferometers, Stars, Exoplanets, Glasses

Read Abstract +

Proceedings Article | 20 August 2009 Paper

A new generation multi-object Doppler instrument for the SDSS-III Multi-object APO Radial Velocity Exoplanet Large-area Survey

Jian Ge, Brian Lee, Nathan De Lee, Xiaoke Wan, John Groot, Bo Zhao, Frank Varosi, Kevin Hanna, Suvrath Mahadevan, Fred Hearty, Liang Chang, Jian Liu, Julian van Eyken, Ji Wang, Rohan Pais, Zhiping Chen, Alaina Shelden, Erin Costello

Proceedings Volume 7440, 74400L (2009) https://doi.org/10.1117/12.826651

KEYWORDS: Stars, Exoplanets, Planets, Interferometers, Doppler effect, Calibration, Spectrographs, Telescopes, Optical fibers, Germanium

Read Abstract +

Showing 5 of 31 publications

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years