6533b7ddfe1ef96bd1274039
RESEARCH PRODUCT
ARES. III. Unveiling the Two Faces of KELT-7 b with HST WFC3
William PlurielDorian BlainMichelle Fabienne BiegerJérémy LeconteDarius Modirrousta-galianMathilde PovedaNour SkafQuentin ChangeatKai Hou YipIngo WaldmannRobin BaeyensAhmed Al-refaiePierre DrossartBilly EdwardsMario MorvanAmélie GressierBenjamin CharnayFlavien KieferGloria GuilluyNiall WhitefordAdam Yassin JaziriSam WrightTiziano ZingalesOlivia VenotJean-philippe BeaulieuJean-philippe BeaulieuAngelos TsiarasLorenzo V. Mugnaisubject
010504 meteorology & atmospheric sciencesOpacityFOS: Physical sciencesEFFICIENTTransmission spectroscopy; Exoplanet atmospheres; Astronomy data analysisAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAstronomy & Astrophysics01 natural sciencesAtmosphereHubble space telescope0103 physical sciencesTransmission spectroscopyEMISSION-SPECTRUMWATERBlack-body radiationEmission spectrumAbsorption (electromagnetic radiation)010303 astronomy & astrophysicsAstrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesEarth and Planetary Astrophysics (astro-ph.EP)PhysicsScience & TechnologyHOT JUPITERSAstronomy and AstrophysicsBIASESEXOPLANETSTransmission (telecommunications)13. Climate actionSpace and Planetary SciencePhysical SciencesAstronomy data analysisHD 209458BAstrophysics::Earth and Planetary AstrophysicsATMOSPHERESWide Field Camera 3Astrophysics - Earth and Planetary AstrophysicsExoplanet atmospheresdescription
We present the analysis of the hot-Jupiter KELT-7b using transmission and emission spectroscopy from the Hubble Space Telescope (HST), both taken with the Wide Field Camera 3 (WFC3). Our study uncovers a rich transmission spectrum which is consistent with a cloud-free atmosphere and suggests the presence of H2O and H-. In contrast, the extracted emission spectrum does not contain strong absorption features and, although it is not consistent with a simple blackbody, it can be explained by a varying temperature-pressure profile, collision induced absorption (CIA) and H-. KELT-7 b had also been studied with other space-based instruments and we explore the effects of introducing these additional datasets. Further observations with Hubble, or the next generation of space-based telescopes, are needed to allow for the optical opacity source in transmission to be confirmed and for molecular features to be disentangled in emission.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-06-25 | The Astronomical Journal |