High-resolution Transmission Spectroscopy of Four Hot Inflated Gas Giant Exoplanets

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00517247" target="_blank" >RIV/67985815:_____/19:00517247 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.3847/1538-3881/ab32ec" target="_blank" >https://doi.org/10.3847/1538-3881/ab32ec</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-3881/ab32ec" target="_blank" >10.3847/1538-3881/ab32ec</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-resolution Transmission Spectroscopy of Four Hot Inflated Gas Giant Exoplanets

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

High-resolution Transmission Spectroscopy of Four Hot Inflated Gas Giant Exoplanets

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/GC17-01752J" target="_blank" >GC17-01752J: Program Tautenburgu a Ondřejova pro měření radiálních rychlostí tranzitujících planetárních systémů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

ASTRONOMICAL JOURNAL

ISSN

1538-3881

e-ISSN

—

Svazek periodika

158

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

120

Kód UT WoS článku

000482574300001

EID výsledku v databázi Scopus

2-s2.0-85072370952