Constraining exoplanet metallicities and aerosols with the contribution to ARIEL spectroscopy of exoplanets (CASE)

Robert T. Zellem, Mark R. Swain, Nicolas B. Cowan, Geoffrey Bryden, Thaddeus D. Komacek, Mark Colavita, David Ardila, Gael M. Roudier, Jonathan J. Fortney, Jacob Bean, Michael R. Line, Caitlin A. Griffith, Evgenya L. Shkolnik, Laura Kreidberg, Julianne I. Moses, Adam P. Showman, Kevin B. Stevenson, Andre Wong, John W. Chapman, David R. CiardiAndrew W. Howard, Tiffany Kataria, Eliza M.R. Kempton, David Latham, Suvrath Mahadevan, Jorge Meléndez, Vivien Parmentier

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Launching in 2028, ESA’s 0.64 m2 Atmospheric Remote-sensing Exoplanet Large-survey (ARIEL) survey of ∼1000 transiting exoplanets will build on the legacies of NASA’s Kepler and Transiting Exoplanet Survey Satellite (TESS), and complement the James Webb Space Telescope (JWST) by placing its high-precision exoplanet observations into a large, statistically significant planetary population context. With continuous 0.5–7.8 μm coverage from both FGS (0.5–0.6, 0.6–0.81, and 0.81–1.1 μm photometry; 1.1–1.95 μm spectroscopy) and AIRS (1.95–7.80 μm spectroscopy), ARIEL will determine atmospheric compositions and probe planetary formation histories during its 3.5 yr mission. NASA’s proposed Contribution to ARIEL Spectroscopy of Exoplanets (CASE) would be a subsystem of ARIEL’s Fine Guidance Sensor (FGS) instrument consisting of two visible-to-infrared detectors, associated readout electronics, and thermal control hardware. FGS, to be built by the Polish Academy of Sciences Space Research Centre, will provide both fine guiding and visible to near-infrared photometry and spectroscopy, providing powerful diagnostics of atmospheric aerosol contribution and planetary albedo, which play a crucial role in establishing planetary energy balance. The CASE team presents here an independent study of the capabilities of ARIEL to measure exoplanetary metallicities, which probe the conditions of planet formation, and FGS to measure scattering spectral slopes, which indicate if an exoplanet has atmospheric aerosols (clouds and hazes), and geometric albedos, which help establish planetary climate. Our simulations assume that ARIEL’s performance will be 1.3×the photon-noise limit. This value is motivated by current transiting exoplanet observations: Spitzer/IRAC and Hubble/WFC3 have empirically achieved 1.15×the photon-noise limit. One could expect similar performance from ARIEL, JWST, and other proposed future missions such as HabEx, LUVOIR, and Origins. Our design reference mission simulations show that ARIEL could measure the mass– metallicity relationship of its 1000-planet single-visit sample to >7.5σ and that FGS could distinguish between clear, cloudy, and hazy skies and constrain an exoplanet’s atmospheric aerosol composition to ≳5σ for hundreds of targets, providing statistically transformative science for exoplanet atmospheres.

Original languageEnglish (US)
Article number094401
JournalPublications of the Astronomical Society of the Pacific
Volume131
Issue number1003
DOIs
StatePublished - Sep 2019
Externally publishedYes

Fingerprint

extrasolar planets
metallicity
remote sensing
aerosols
spectroscopy
aerosol
guidance sensors
sensor
albedo
planet
probe
James Webb Space Telescope
AIRS
aerosol composition
volcanic cloud
haze
hardware
planets
energy balance
simulation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Constraining exoplanet metallicities and aerosols with the contribution to ARIEL spectroscopy of exoplanets (CASE). / Zellem, Robert T.; Swain, Mark R.; Cowan, Nicolas B.; Bryden, Geoffrey; Komacek, Thaddeus D.; Colavita, Mark; Ardila, David; Roudier, Gael M.; Fortney, Jonathan J.; Bean, Jacob; Line, Michael R.; Griffith, Caitlin A.; Shkolnik, Evgenya L.; Kreidberg, Laura; Moses, Julianne I.; Showman, Adam P.; Stevenson, Kevin B.; Wong, Andre; Chapman, John W.; Ciardi, David R.; Howard, Andrew W.; Kataria, Tiffany; Kempton, Eliza M.R.; Latham, David; Mahadevan, Suvrath; Meléndez, Jorge; Parmentier, Vivien.

In: Publications of the Astronomical Society of the Pacific, Vol. 131, No. 1003, 094401, 09.2019.

Research output: Contribution to journalArticle

Zellem, RT, Swain, MR, Cowan, NB, Bryden, G, Komacek, TD, Colavita, M, Ardila, D, Roudier, GM, Fortney, JJ, Bean, J, Line, MR, Griffith, CA, Shkolnik, EL, Kreidberg, L, Moses, JI, Showman, AP, Stevenson, KB, Wong, A, Chapman, JW, Ciardi, DR, Howard, AW, Kataria, T, Kempton, EMR, Latham, D, Mahadevan, S, Meléndez, J & Parmentier, V 2019, 'Constraining exoplanet metallicities and aerosols with the contribution to ARIEL spectroscopy of exoplanets (CASE)', Publications of the Astronomical Society of the Pacific, vol. 131, no. 1003, 094401. https://doi.org/10.1088/1538-3873/ab2d54
Zellem, Robert T. ; Swain, Mark R. ; Cowan, Nicolas B. ; Bryden, Geoffrey ; Komacek, Thaddeus D. ; Colavita, Mark ; Ardila, David ; Roudier, Gael M. ; Fortney, Jonathan J. ; Bean, Jacob ; Line, Michael R. ; Griffith, Caitlin A. ; Shkolnik, Evgenya L. ; Kreidberg, Laura ; Moses, Julianne I. ; Showman, Adam P. ; Stevenson, Kevin B. ; Wong, Andre ; Chapman, John W. ; Ciardi, David R. ; Howard, Andrew W. ; Kataria, Tiffany ; Kempton, Eliza M.R. ; Latham, David ; Mahadevan, Suvrath ; Meléndez, Jorge ; Parmentier, Vivien. / Constraining exoplanet metallicities and aerosols with the contribution to ARIEL spectroscopy of exoplanets (CASE). In: Publications of the Astronomical Society of the Pacific. 2019 ; Vol. 131, No. 1003.
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abstract = "Launching in 2028, ESA’s 0.64 m2 Atmospheric Remote-sensing Exoplanet Large-survey (ARIEL) survey of ∼1000 transiting exoplanets will build on the legacies of NASA’s Kepler and Transiting Exoplanet Survey Satellite (TESS), and complement the James Webb Space Telescope (JWST) by placing its high-precision exoplanet observations into a large, statistically significant planetary population context. With continuous 0.5–7.8 μm coverage from both FGS (0.5–0.6, 0.6–0.81, and 0.81–1.1 μm photometry; 1.1–1.95 μm spectroscopy) and AIRS (1.95–7.80 μm spectroscopy), ARIEL will determine atmospheric compositions and probe planetary formation histories during its 3.5 yr mission. NASA’s proposed Contribution to ARIEL Spectroscopy of Exoplanets (CASE) would be a subsystem of ARIEL’s Fine Guidance Sensor (FGS) instrument consisting of two visible-to-infrared detectors, associated readout electronics, and thermal control hardware. FGS, to be built by the Polish Academy of Sciences Space Research Centre, will provide both fine guiding and visible to near-infrared photometry and spectroscopy, providing powerful diagnostics of atmospheric aerosol contribution and planetary albedo, which play a crucial role in establishing planetary energy balance. The CASE team presents here an independent study of the capabilities of ARIEL to measure exoplanetary metallicities, which probe the conditions of planet formation, and FGS to measure scattering spectral slopes, which indicate if an exoplanet has atmospheric aerosols (clouds and hazes), and geometric albedos, which help establish planetary climate. Our simulations assume that ARIEL’s performance will be 1.3×the photon-noise limit. This value is motivated by current transiting exoplanet observations: Spitzer/IRAC and Hubble/WFC3 have empirically achieved 1.15×the photon-noise limit. One could expect similar performance from ARIEL, JWST, and other proposed future missions such as HabEx, LUVOIR, and Origins. Our design reference mission simulations show that ARIEL could measure the mass– metallicity relationship of its 1000-planet single-visit sample to >7.5σ and that FGS could distinguish between clear, cloudy, and hazy skies and constrain an exoplanet’s atmospheric aerosol composition to ≳5σ for hundreds of targets, providing statistically transformative science for exoplanet atmospheres.",
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AU - Zellem, Robert T.

AU - Swain, Mark R.

AU - Cowan, Nicolas B.

AU - Bryden, Geoffrey

AU - Komacek, Thaddeus D.

AU - Colavita, Mark

AU - Ardila, David

AU - Roudier, Gael M.

AU - Fortney, Jonathan J.

AU - Bean, Jacob

AU - Line, Michael R.

AU - Griffith, Caitlin A.

AU - Shkolnik, Evgenya L.

AU - Kreidberg, Laura

AU - Moses, Julianne I.

AU - Showman, Adam P.

AU - Stevenson, Kevin B.

AU - Wong, Andre

AU - Chapman, John W.

AU - Ciardi, David R.

AU - Howard, Andrew W.

AU - Kataria, Tiffany

AU - Kempton, Eliza M.R.

AU - Latham, David

AU - Mahadevan, Suvrath

AU - Meléndez, Jorge

AU - Parmentier, Vivien

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N2 - Launching in 2028, ESA’s 0.64 m2 Atmospheric Remote-sensing Exoplanet Large-survey (ARIEL) survey of ∼1000 transiting exoplanets will build on the legacies of NASA’s Kepler and Transiting Exoplanet Survey Satellite (TESS), and complement the James Webb Space Telescope (JWST) by placing its high-precision exoplanet observations into a large, statistically significant planetary population context. With continuous 0.5–7.8 μm coverage from both FGS (0.5–0.6, 0.6–0.81, and 0.81–1.1 μm photometry; 1.1–1.95 μm spectroscopy) and AIRS (1.95–7.80 μm spectroscopy), ARIEL will determine atmospheric compositions and probe planetary formation histories during its 3.5 yr mission. NASA’s proposed Contribution to ARIEL Spectroscopy of Exoplanets (CASE) would be a subsystem of ARIEL’s Fine Guidance Sensor (FGS) instrument consisting of two visible-to-infrared detectors, associated readout electronics, and thermal control hardware. FGS, to be built by the Polish Academy of Sciences Space Research Centre, will provide both fine guiding and visible to near-infrared photometry and spectroscopy, providing powerful diagnostics of atmospheric aerosol contribution and planetary albedo, which play a crucial role in establishing planetary energy balance. The CASE team presents here an independent study of the capabilities of ARIEL to measure exoplanetary metallicities, which probe the conditions of planet formation, and FGS to measure scattering spectral slopes, which indicate if an exoplanet has atmospheric aerosols (clouds and hazes), and geometric albedos, which help establish planetary climate. Our simulations assume that ARIEL’s performance will be 1.3×the photon-noise limit. This value is motivated by current transiting exoplanet observations: Spitzer/IRAC and Hubble/WFC3 have empirically achieved 1.15×the photon-noise limit. One could expect similar performance from ARIEL, JWST, and other proposed future missions such as HabEx, LUVOIR, and Origins. Our design reference mission simulations show that ARIEL could measure the mass– metallicity relationship of its 1000-planet single-visit sample to >7.5σ and that FGS could distinguish between clear, cloudy, and hazy skies and constrain an exoplanet’s atmospheric aerosol composition to ≳5σ for hundreds of targets, providing statistically transformative science for exoplanet atmospheres.

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