Results 101 to 110 of about 269 (181)

Astrophysics The Earth as an extrasolar transiting planet II. HARPS and UVES detection of water vapour, biogenic O 2 , and O 3

, 2014
International audienceContext. The atmospheric composition of transiting exoplanets can be characterized during transit by spectroscopy. Detections of several chemical species have previously been reported in the atmosphere of gaseous giant exoplanets ...
Dumusque, X, Vidal-Madjar, A, C. Moutou, A. Vidal-Madjar, C. Lovis, Nitschelm, C, Crooker, D, Berthier, J, R. Ferlet, Ehrenreich, D, Querel, Richard, Arnold, L, Hedelt, P, P. Hedelt, Ferlet, R, J. Berthier, Lovis, C, D. Ehrenreich, R. R. Querel, L. Arnold, X. Dumusque, Moutou, C, D. Crooker, C. Nitschelm   +23 more
core   +1 more source

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. V. Two Giant Planets in Kepler-511 but Only One Ran Away

The Astronomical Journal
Systems hosting multiple giant planets are important laboratories for understanding planetary formation and migration processes. We present a nearly decade-long Doppler spectroscopy campaign from the HIRES instrument on the Keck-I telescope to ...
Yayaati Chachan, Paul A. Dalba, Daniel P. Thorngren, Stephen R. Kane, Howard Isaacson, Eve J. Lee, Edward W. Schwieterman, Andrew W. Howard, Matthew J. Payne   +8 more
doaj   +1 more source

Planet Migration in Protoplanetary Disks with Rims

The Astrophysical Journal
Complex structures, including sharp edges, rings, and gaps, have been commonly observed in protoplanetary disks with or without planetary candidates. Here we consider the possibility that they are the intrinsic consequences of angular momentum transfer ...
Zhuoya Cao, Ya-Ping Li, Douglas N.C. Lin, Shude Mao   +3 more
doaj   +1 more source

An exomoon survey of 70 cool giant exoplanets and the new candidate Kepler-1708 b-i. [PDF]

Nat Astron, 2022
Kipping D, Bryson S, Burke C, Christiansen J, Hardegree-Ullman K, Quarles B, Hansen B, Szulágyi J, Teachey A.   +8 more
europepmc   +1 more source

Gas Giants Formed by Gravitational Instability May Accrete Atmospheres with Superstellar Carbon-to-oxygen Ratios

The Astrophysical Journal
Characterizing the atmospheric compositions of exoplanets, along with determining properties such as their mass, mean density, and orbital configuration, are thought to be an effective means for differentiating between various formation and evolution ...
Alan P. Boss
doaj   +1 more source

Introduction-First Billion Years: Habitability. [PDF]

Astrobiology, 2021
Rivera-Valentín EG, Filiberto J, Lynch KL, Mamajanov I, Lyons TW, Schulte M, Méndez A.   +6 more
europepmc   +1 more source

WASP-39b: exo-Saturn with patchy cloud composition, moderate metallicity, and underdepleted S/O

, 2023
WASP-39b is one of the first extrasolar giant gas planets that has been observed within the JWST ERS program. Fundamental properties that may enable the link to exoplanet formation differ amongst retrieval methods, for example metallicity and mineral ...
Lewis, David A., Carone, Ludmila, Samra, Dominic, Helling, Christiane, Schneider, Aaron D.   +4 more
core  

On the implementation of novel RKARMS(4,4) algorithm to study the structures of initial extrasolar giant protoplanets. [PDF]

Heliyon, 2020
Chandra Paul G, Senthilkumar S, Rahman H.   +2 more
europepmc   +1 more source

Exoplanets: Atmospheres of Hot Jupiters

, 2019
The history of exoplanetary atmospheres studies is strongly based on the observations and investigations of the gaseous envelopes of hot Jupiters—exoplanet gas giants that have masses comparable to the mass of Jupiter and orbital semi-major axes shorter ...
Pavel V. Kaygorodov, Valery I. Shematovich, Dmitry V. Bisikalo   +2 more
core   +1 more source

Detection of Four Cold Jupiters through Combined Analyses of Radial Velocity and Astrometry Data

The Astronomical Journal
Cold Jupiters play a crucial role in planet formation and dynamical evolution. Since their initial discovery around 47 UMa, they have attracted significant interest; however, their formation mechanisms remain uncertain, underscoring the need to expand ...
Yiyun Wu, Guang-Yao Xiao, R. Paul Butler, Fabo Feng, Stephen A. Shectman, Jeffrey D. Crane, Johanna K. Teske, Sharon X. Wang, Yuri Beletsky, Jennifer A. Burt, Tansu Daylan, Matias Diaz, Diana Dragomir, Erin Flowers, Sydney Jenkins, Shubham Kanodia, Sangeetha Nandakumar, Malena Rice, Avi Shporer, Sam Yee, George Zhou, Zitao Lin   +21 more
doaj   +1 more source