Results 51 to 60 of about 54,418 (256)

The multiplicity of exoplanet host stars - New low-mass stellar companions of the exoplanet host stars HD125612 and HD212301 [PDF]

, 2008
Aims: We present new results from our ongoing multiplicity study of exoplanet host stars, carried out with SofI/NTT. We provide the most recent list of confirmed binary and triple star systems that harbor exoplanets. Methods: We use direct imaging to identify wide stellar and substellar companions as co-moving objects to the observed exoplanet host ...
arxiv   +1 more source

Exploring and Validating Exoplanet Atmospheric Retrievals with Solar System Analog Observations [PDF]

arXiv, 2022
Solar System observations that serve as analogs for exoplanet remote sensing data can provide important opportunities to validate ideas and models related to exoplanet environments. Critically, and unlike true exoplanet observations, Solar System analog data benefit from available high-quality ground- or orbiter-derived "truth" constraints that enable ...
arxiv  

Noise Sources in Photometry and Radial Velocities

, 2017
The quest for Earth-like, extrasolar planets (exoplanets), especially those located inside the habitable zone of their host stars, requires techniques sensitive enough to detect the faint signals produced by those planets.
A. Reiners, A.P. Hatzes, A.P. Hatzes, A.P. Hatzes, B. Béky, D. Queloz, D. Queloz, D.M. Kipping, E. Herrero, F. Pont, G. Basri, G. Boué, I. Boisse, I. Boisse, I. Boisse, J.A. Carter, J.M. Jenkins, J.P. Faria, K.G. Strassmeier, M. Bazot, M. Mayor, M. Oshagh, M. Oshagh, N. Meunier, N.C. Santos, N.C. Santos, N.C. Santos, O.C. Wilson, P. Figueira, R.D. Haywood, R.L. Gilliland, R.W. Noyes, S. Aigrain, S. Czesla, S.C.C. Barros, S.H. Saar, T. Barclay, W.J. Borucki, X. Bonfils, X. Dumusque, X. Dumusque, X. Dumusque, X. Dumusque   +42 more
core   +1 more source

A short-period censor of sub-Jupiter mass exoplanets with low density [PDF]

, 2010
Despite the existence of many short-period hot Jupiters, there is not one hot Neptune with an orbital period less than 2.5 days. Here we discuss a cluster analysis of the currently known 106 transiting exoplanets to investigate a possible explanation for
Adams, Armitage, Broeg, Chabrier, Fisher, Fortney, Ida, Ivezić, Mahalanobis, Masset, Rogers, Schlaufman, Schneider, Valencia, Winn   +14 more
core   +2 more sources

Gaia Search for Stellar Companions of TESS Objects of Interest V

Astronomische Nachrichten, EarlyView.
ABSTRACT In this paper, we present the latest results of our ongoing multiplicity survey of (Community) TESS Objects of Interest, using astrometry and photometry from the latest data release of the ESA Gaia mission to detect stellar companions of these stars and to characterize their properties.
Markus Mugrauer, Ann‐Kathrin Kollak, Lara Pietsch, Kai‐Uwe Michel   +3 more
wiley   +1 more source

Distinguishing multicellular life on exoplanets by testing Earth as an exoplanet [PDF]

International Journal of Astrobiology, 2020
AbstractCan multicellular life be distinguished from single cellular life on an exoplanet? We hypothesize that abundant upright photosynthetic multicellular life (trees) will cast shadows at high sun angles that will distinguish them from single cellular life and test this using Earth as an exoplanet.
Christopher E. Doughty, Andrew J. Abraham, James Windsor, Michael Mommert, Michael Gowanlock, Tyler Robinson, David E. Trilling   +6 more
openaire   +6 more sources

Exoplanet phase curves: observations and theory

, 2018
Phase curves are the best technique to probe the three dimensional structure of exoplanets' atmospheres. In this chapter we first review current exoplanets phase curve observations and the particular challenges they face.
A Shporer, A Shporer, Adam P. Showman, AP Showman, AP Showman, AP Showman, BO Demory, BO Demory, C Visscher, Curtis S. Cooper, D Perez-Becker, D Piskorz, D. J. Armstrong, DDB Koll, F Selsis, HA Knutson, HA Knutson, Heather A. Knutson, I Hubeny, Ian Wong, Ian Wong, IJM Crossfield, IJM Crossfield, IJM Crossfield, J Harrington, J Langton, J Leconte, J Leconte, J Wit de, J Yang, J. C. Schwartz, JC Schwartz, JE Krick, JJ Fortney, K Batygin, K Haynes, K Heng, K Heng, KB Stevenson, KB Stevenson, KB Stevenson, KB Stevenson, Kevin B. Stevenson, L Kreidberg, Lisa J. Esteves, M Agúndez, M Oreshenko, MR Line, MW Webber, N Iro, NB Cowan, NB Cowan, NB Cowan, Nicolas B. Cowan, NK Lewis, NK Lewis, P Hut, PFL Maxted, R Hu, R Perna, R Perna, Robert T. Zellem, RT Pierrehumbert, S Fromang, S Millholland, SM Tsai, SR Kane, T Guillot, T Kataria, T Kataria, TD Komacek, Thaddeus D. Komacek, TM Evans, TM Rogers, TM Rogers, UA Dyudina, V Parmentier, Vivien Parmentier, Vivien Parmentier, Vivien Parmentier, X Zhang, YK Feng   +81 more
core   +1 more source

Anti-correlation between multiplicity and orbital properties in exoplanetary systems as a possible record of their dynamical histories [PDF]

, 2017
Previous works focused on exoplanets discovered with the radial velocity (RV) method reported an anti-correlation between the orbital eccentricities of the exoplanets and the multiplicity M (i.e., number of planets) of their system.
Turrini, Diego, Zinzi, Angelo
core   +3 more sources

Zehn Jahre Gaia‐Messungen: Die hochgenaue Kartierung des Himmels

Physik in unserer Zeit, EarlyView.
Das astrometrische Weltraumobservatorium Gaia der Europäischen Weltraumorganisation hat die astrometrische Forschung revolutioniert, indem es unter anderem präzise Positionen, Bewegungen und Entfernungen von fast zwei Milliarden Himmelsobjekten gemessen hat. Damit stellt es wertvolle Daten für fast alle Gebiete der Astrophysik bereit. Nach dem Ende der
Stefan Jordan
wiley   +1 more source

Molecular opacities for exoplanets [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2014
Spectroscopic observations of exoplanets are now possible by transit methods and direct emission. Spectroscopic requirements for exoplanets are reviewed based on existing measurements and model predictions for hot Jupiters and super-Earths.
Peter F. Bernath, Peter F. Bernath
openaire   +4 more sources