Ground-based detection of calcium and possibly scandium and hydrogen in the atmosphere of HD 209458b
Reads0
Chats0
TLDR
In this article, the authors presented an alternative method for correcting the telluric effects through the analysis of variations in spectral lines with the airmass, which can shed light on the atmospheric composition of the exoplanet HD 209458b.Abstract:
Context. Since the first exoplanetary atmosphere detection using the Hubble Space Telescope, characterization of exoplanet atmospheres from the ground have been playing an increasingly important role in the analysis of these atmospheres thanks to the enhancement of telluric correction techniques. At present, several species have been discovered in the atmosphere of HD 209458b, all of them consistent with theoretical models. Aims. Data acquired using the High Dispersion Spectrograph on the Subaru telescope are re-analysed. We expect to discover new species in the atmosphere of the exoplanet HD 209458b. In addition to shedding light on the atmospheric composition, we will derive the radial extension of the absorbents present in the atmosphere of the exoplanet. Methods. We present an alternative method for correcting the telluric effects through the analysis of variations in spectral lines with the airmass. To search for absorptions due to an exoplanetary atmosphere we implemented an algorithm to automatically search for all the features presenting an atmospheric signature in the transmission spectrum and through the wavelength range in the data. To estimate uncertainties we performed a bootstrapping analysis. Results. Absorption excess due to the transitions of calcium at 6162.17 A and 6493.78 A, scandium at 5526.79 A, hydrogen at 6562.8 A, and the sodium doublet are detected in the transmission spectrum at a level of −0.079 ± 0.012%, −0.138 ± 0.013%, −0.059 ± 0.012%, −0.123 ± 0.012%, −0.071 ± 0.016% using pass-bands of 0.5 A, 0.4 A, 0.5 A, 1.1 A, and 0.6 A, respectively. Conclusions. Models predict strong absorption in the sodium resonance doublet which was previously detected, also in this analysis. However, this is the first report of calcium and possibly scandium in HD 209458b, including the possible ground-based detection of hydrogen. Calcium is expected to condense out in the atmosphere of this exoplanet; therefore, confirmation of these results will certainly imply a review of theoretical models.read more
Citations
More filters
Book
The Exoplanet Handbook
TL;DR: In this paper, the authors present an overview of the solar system and its evolution, including the formation and evolution of stars, asteroids, and free-floating planets, as well as their internal and external structures.
Journal ArticleDOI
Spectrally resolved detection of sodium in the atmosphere of HD 189733b with the HARPS spectrograph
TL;DR: In this article, the authors obtained a high-resolution transit spectrum of HD 189733b in the region around the resonance doublet of Nai at 589 nm, to characterize the absorption signature that was previously detected from space at low resolution.
Journal ArticleDOI
Exoplanetary Atmospheres—Chemistry, Formation Conditions, and Habitability
TL;DR: The theory of atmospheric chemistry in all classes of exoplanets discovered to date is reviewed, from highly irradiated gas giants, ice giants, and super-Earths, to directly imaged giant planets at large orbital separations.
Journal ArticleDOI
A spectral survey of an ultra-hot Jupiter. Detection of metals in the transmission spectrum of KELT-9 b
H. J. Hoeijmakers,H. J. Hoeijmakers,David Ehrenreich,Daniel Kitzmann,Romain Allart,Simon L. Grimm,Julia V. Seidel,Aurélien Wyttenbach,Lorenzo Pino,Louise D. Nielsen,Chloe Fisher,Paul B. Rimmer,Paul B. Rimmer,Vincent Bourrier,Heather M. Cegla,Baptiste Lavie,C. Lovis,A. B. C. Patzer,Joachim Stock,Francesco Pepe,Kevin Heng +20 more
TL;DR: In this article, the optical transmission spectrum of KELT-9 b was searched for absorption lines by metals using the cross-correlation technique, and the detected absorption lines are significantly deeper than predicted by the model, suggesting that the material is transported to higher altitudes where the density is enhanced compared to a hydrostatic profile.
Journal ArticleDOI
Atmospheric characterization of the ultra-hot Jupiter MASCARA-2b/KELT-20b.
N. Casasayas-Barris,Enric Palle,Fei Yan,Gang Chen,S. Kohl,M. Stangret,Hannu Parviainen,Christiane Helling,N. Watanabe,S. Czesla,Akihiko Fukui,Pilar Montañés-Rodríguez,Erick Nagel,Norio Narita,Lisa Nortmann,Grzegorz Nowak,J.H.M.M. Schmit,M. R. Zapatero Osorio +17 more
TL;DR: In this article, the authors studied the atmosphere of one of these particular hot planets, MASCARA-2b/KELT-20b, using four transit observations with high resolution spectroscopy facilities.
References
More filters
Book
CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
Journal ArticleDOI
A Jupiter-Mass Companion to a Solar-Type Star
Michel Mayor,Didier Queloz +1 more
TL;DR: The presence of a Jupiter-mass companion to the star 51 Pegasi is inferred from observations of periodic variations in the star's radial velocity as discussed by the authors, which would be well inside the orbit of Mercury in our Solar System.
Journal ArticleDOI
Detection of an Extrasolar Planet Atmosphere
TL;DR: In this paper, high-precision spectrophotometric observations of four planetary transits of HD 209458, in the region of the sodium resonance doublet at 589.3 nm, were reported.
Journal ArticleDOI
An extended upper atmosphere around the extrasolar planet HD209458b
Alfred Vidal-Madjar,A. Lecavelier des Etangs,Jean-Michel Desert,Gilda E. Ballester,Roger Ferlet,Guillaume Hébrard,M. Mayor +6 more
TL;DR: The detection of atomic hydrogen absorption in the stellar Lyman α line during three transits of HD209458b is reported, showing that this absorption should take place beyond the Roche limit and therefore can be understood in terms of escaping hydrogen atoms.
Journal ArticleDOI
Detection of an Extrasolar Planet Atmosphere
TL;DR: In this article, high precision spectrophotometric observations of four planetary transits of HD 209458, in the region of the sodium resonance doublet at 589.3 nm, were reported.