ŽÁK, Jiří, Petr KABÁTH, Henri M. J. BOFFIN, Valentin D. IVANOV a Marek SKARKA. High-resolution Transmission Spectroscopy of Four Hot Inflated Gas Giant Exoplanets. Astronomical Journal. BRISTOL: Springer Science+Business Media, roč. 158, č. 3, s. 1-8. ISSN 0004-6256. doi:10.3847/1538-3881/ab32ec. 2019.
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Základní údaje
Originální název High-resolution Transmission Spectroscopy of Four Hot Inflated Gas Giant Exoplanets
Autoři ŽÁK, Jiří (203 Česká republika, garant, domácí), Petr KABÁTH (203 Česká republika), Henri M. J. BOFFIN, Valentin D. IVANOV a Marek SKARKA (203 Česká republika, domácí).
Vydání Astronomical Journal, BRISTOL, Springer Science+Business Media, 2019, 0004-6256.
Další údaje
Originální jazyk angličtina
Typ výsledku Článek v odborném periodiku
Obor 10308 Astronomy
Stát vydavatele Velká Británie a Severní Irsko
Utajení není předmětem státního či obchodního tajemství
WWW Full Text
Impakt faktor Impact factor: 5.840
Kód RIV RIV/00216224:14310/19:00111907
Organizační jednotka Přírodovědecká fakulta
Doi http://dx.doi.org/10.3847/1538-3881/ab32ec
UT WoS 000482574300001
Klíčová slova anglicky planetary systems; planets and satellites: atmospheres; planets and satellites: individual (WASP-76b; WASP-127b; WAS P-166b; KELT-11); techniques: spectroscopic
Štítky rivok
Příznaky Mezinárodní význam, Recenzováno
Změnil Změnila: Mgr. Marie Šípková, DiS., učo 437722. Změněno: 10. 3. 2020 10:16.
Anotace
The technique of transmission spectroscopy allows us to constrain the chemical composition of the atmospheres of transiting exoplanets. It relies on very high signal-to-noise spectroscopic (or spectrophotometric) observations and is thus most suited for bright exoplanet host stars. In the era of the Transiting Exoplanet Survey Satellite, Next Generation Space Telescope, and PLAnetary Transits and Oscillations of stars (PLATO), more and more suitable targets, even for mid-sized telescopes, are discovered. Furthermore, a wealth of archival data is available that could become a basis for long-term monitoring of exo-atmospheres. We analyzed archival High Accuracy Radial velocity Planet Searcher (HARPS) spectroscopic time series of four host stars to transiting bloated gas exoplanets, namely WASP-76b, WASP-127b, WASP-166b, and KELT-11b, searching for traces of sodium (sodium doublet), hydrogen (H alpha, H beta), and lithium (670.8 nm). The archival data sets include spectroscopic time series taken during transits. Comparing in- and out-of-transit spectra we can filter out the stellar lines and investigate the absorption from the planet. Simultaneously, the stellar activity is monitored using the Mg I and Ca I lines. We detect sodium in the atmosphere of WASP-76b at a 7-9 sigma level. Furthermore, we report also at a 4-8 sigma level of significance the detection of sodium in the atmosphere of WASP-127b, confirming earlier results based on low-resolution spectroscopy. The data show no sodium nor any other atom at high confidence levels for WASP-166b nor KELT-11b, hinting at the presence of thick high clouds.
Návaznosti
EF16_027/0008360, projekt VaVNázev: Postdoc@MUNI
VytisknoutZobrazeno: 28. 3. 2024 19:24