Chris Stark
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View article: Bayesian Analysis for Remote Biosignature Identification on exoEarths (BARBIE): Exploring New Worlds with BARBIE and KEN
Bayesian Analysis for Remote Biosignature Identification on exoEarths (BARBIE): Exploring New Worlds with BARBIE and KEN Open
We have seen the discovery and confirmation of thousands of exoplanets since the first planet found orbiting a Sun-like star (Mayor & Queloz, 1995), and we are now on the verge of entering an exciting new era of planetary exploration: dete…
View article: BARBIE. Bayesian Analysis for Remote Biosignature Identification on exoEarths. III. Introducing the KEN
BARBIE. Bayesian Analysis for Remote Biosignature Identification on exoEarths. III. Introducing the KEN Open
We deploy a newly generated set of geometric albedo spectral grids to examine the detectability of methane (CH 4 ) in the reflected-light spectrum of an Earth-like exoplanet at visible and near-infrared (NIR) wavelengths with a future exop…
View article: Bayesian Analysis for Remote Biosignature Identification on exoEarths (BARBIE) \RNum{3}: Introducing the KEN
Bayesian Analysis for Remote Biosignature Identification on exoEarths (BARBIE) \RNum{3}: Introducing the KEN Open
We deploy a newly-generated set of geometric albedo spectral grids to examine the detectability of methane (CH4) in the reflected-light spectrum of an Earth-like exoplanet at visible and near-infrared wavelengths with a future exoplanet im…
View article: HPIC: The Habitable Worlds Observatory Preliminary Input Catalog
HPIC: The Habitable Worlds Observatory Preliminary Input Catalog Open
The Habitable Worlds Observatory Preliminary Input Catalog (HPIC) is a list of ~13,000 nearby bright stars that will be potential targets for the Habitable Worlds Observatory (HWO) in its search for Earth-sized planets around Sun-like star…
View article: Starshade Rendezvous: Exoplanet Sensitivity and Observing Strategy
Starshade Rendezvous: Exoplanet Sensitivity and Observing Strategy Open
Launching a starshade to rendezvous with the Roman Space Telescope would provide the first opportunity to directly image the habitable zones of nearby sunlike stars in the coming decade. A report on the science and feasibility of such a mi…
View article: Adaptive optics performance of a simulated coronagraph instrument on a large, segmented space telescope in steady state
Adaptive optics performance of a simulated coronagraph instrument on a large, segmented space telescope in steady state Open
Directly imaging Earth-like exoplanets (``exoEarths'') with a coronagraph instrument on a space telescope requires a stable wavefront with optical path differences limited to tens of picometers RMS during exposure times of a few hours. Whi…
View article: Contrast performance of an 8m off-axis, segmented space telescope equipped with an adaptive optics system
Contrast performance of an 8m off-axis, segmented space telescope equipped with an adaptive optics system Open
The Astro2020 decadal survey recommended an infrared, optical, ultra-violet (IR/O/UV) telescope with a $\sim$6~m inscribed diameter and equipped with a coronagraph instrument to directly image exoEarths in the habitable zone of their host …
View article: Contrast performance of an 8m off-axis, segmented space telescope equipped with an adaptive optics system
Contrast performance of an 8m off-axis, segmented space telescope equipped with an adaptive optics system Open
The Astro2020 decadal survey recommended an infrared, optical, ultra-violet (IR/O/UV) telescope with a ∼6 m inscribed diameter and equipped with a coronagraph instrument to directly image exoEarths in the habitable zone of their host star.…
View article: Faster Exo-Earth yield for HabEx and LUVOIR via extreme precision radial velocity prior knowledge
Faster Exo-Earth yield for HabEx and LUVOIR via extreme precision radial velocity prior knowledge Open
The HabEx and LUVOIR mission concepts reported science yields for mission scenarios in which the instruments must search for potentially habitable planets, determine their orbits, and, if worthwhile, invest the integration time for a spect…
View article: Starshade rendezvous: exoplanet sensitivity and observing strategy
Starshade rendezvous: exoplanet sensitivity and observing strategy Open
Launching a starshade to rendezvous with the Nancy Grace Roman Space Telescope (Roman) would provide the first opportunity to directly image the habitable zones (HZs) of nearby sunlike stars in the coming decade. A report on the science an…
View article: Paving the Way to Future Missions: the Roman Space Telescope Coronagraph Technology Demonstration
Paving the Way to Future Missions: the Roman Space Telescope Coronagraph Technology Demonstration Open
This document summarizes how far the Nancy Grace Roman Space Telescope Coronagraph Instrument (Roman CGI) will go toward demonstrating high-contrast imaging and spectroscopic requirements for potential future exoplanet direct imaging missi…
View article: High-Contrast Testbeds for Future Space-Based Direct Imaging Exoplanet\n Missions
High-Contrast Testbeds for Future Space-Based Direct Imaging Exoplanet\n Missions Open
Instrumentation techniques in the field of direct imaging of exoplanets have\ngreatly advanced over the last two decades. Two of the four NASA-commissioned\nlarge concept studies involve a high-contrast instrument for the imaging and\nspec…
View article: High-Contrast Testbeds for Future Space-Based Direct Imaging Exoplanet Missions
High-Contrast Testbeds for Future Space-Based Direct Imaging Exoplanet Missions Open
Instrumentation techniques in the field of direct imaging of exoplanets have greatly advanced over the last two decades. Two of the four NASA-commissioned large concept studies involve a high-contrast instrument for the imaging and spectra…
View article: Cold Debris Disks as Strategic Targets for the 2020s
Cold Debris Disks as Strategic Targets for the 2020s Open
Cold debris disks (T$
View article: Optimal deformable mirror and pupil apodization combinations for apodized pupil Lyot coronagraphs with obstructed pupils
Optimal deformable mirror and pupil apodization combinations for apodized pupil Lyot coronagraphs with obstructed pupils Open
International audience
View article: Exoplanet Diversity in the Era of Space-based Direct Imaging Missions
Exoplanet Diversity in the Era of Space-based Direct Imaging Missions Open
This whitepaper discusses the diversity of exoplanets that could be detected by future observations, so that comparative exoplanetology can be performed in the upcoming era of large space-based flagship missions. The primary focus will be …
View article: Engineering considerations applied to starshade repointing
Engineering considerations applied to starshade repointing Open
Engineering analysis has been carried out on orbit dynamics that drive the delta-v budget for repointing a free-flying starshade occulter for viewing exoplanets with a space telescope. This analysis has application to the design of starsha…
View article: Missed Debris Disks In The Hst Archive: An Insight Of The Alice Project
Missed Debris Disks In The Hst Archive: An Insight Of The Alice Project Open
I will present the ALICE program, which consisted in re-analyzing the HST-NICMOS coronagraphic archive with new post-processing methods, and its latest science results and developments. I will focus on the results of this project regarding…
View article: Extension of ATLAST/LUVOIR's Capabilities to 5 Microns, or Beyond
Extension of ATLAST/LUVOIR's Capabilities to 5 Microns, or Beyond Open
ATLAST is a particular realization of LUVOIR, the Large Ultraviolet Optical Infrared telescope, a ~10 m diameter space telescope being defined for consideration in the 2020 Decadal Review of astronomy and astrophysics. ATLAST/LUVOIR is gen…