Results 111 to 120 of about 2,057,964 (253)

The Search for Stellar Companions to Exoplanet Host Stars Using the CHARA Array

, 2008
Most exoplanets have been discovered via radial velocity studies, which are inherently insensitive to orbital inclination. Interferometric observations will show evidence of a stellar companion if it sufficiently bright, regardless of the inclination ...
Ellyn K. Baines, Habets G. M. H. J., Harold A. McAlister, Imbert M., Judit Sturmann, Laszlo Sturmann, Mitchell D. S., Nils H. Turner, Perryman M. A. C., Stephen T. Ridgway, Theo A. ten Brummelaar   +10 more
core   +1 more source

The NEID Earth Twin Survey. III. Survey Performance after Three Years on Sky

The Astronomical Journal
The NEID Earth Twin Survey (NETS) has been delivering a rich set of precise radial velocity (RV) measurements for 41 bright, nearby main-sequence stars.
Arvind F. Gupta, Evan Fitzmaurice, Suvrath Mahadevan, Paul Robertson, Jacob K. Luhn, Jason T. Wright, Sarah E. Logsdon, Daniel M. Krolikowski, Leonardo A. Paredes, Chad F. Bender, Mark R. Giovinazzi, Andrea S.J. Lin, Cullen H. Blake, Caleb I. Cañas, Eric B. Ford, Samuel Halverson, Shubham Kanodia, Michael W. McElwain, Andrew Monson, Joe P. Ninan, Jayadev Rajagopal, Arpita Roy, Christian Schwab, Guðmundur Stefánsson, Ryan C. Terrien   +24 more
doaj   +1 more source

The effect of the stellar absorption line centre-to-limb variation on exoplanet transmission spectrum observations

, 2017
Transit spectroscopy is one of the most commonly used techniques for exoplanet atmosphere characterisation. This technique has been used to detect ionized and neutral species in exoplanet atmospheres by comparing the observed stellar lines in and out of ...
Fosbury, Robert A. E., Henning, Thomas, Pallé, Enric, Petr-Gotzens, Monika G., Yan, Fei   +4 more
core   +1 more source

The GPU phase folding and deep learning method for detecting exoplanet transits

Monthly Notices of the Royal Astronomical Society
ABSTRACT This paper presents GPFC, a novel Graphics Processing Unit (GPU) Phase Folding and Convolutional Neural Network (CNN) system to detect exoplanets using the transit method. We devise a fast-folding algorithm parallelized on a GPU to amplify low signal-to-noise ratio transit signals, allowing a search at high precision and speed ...
Kaitlyn Wang, Jian Ge, Kevin Willis, Kevin Wang, Yinan Zhao   +4 more
openaire   +2 more sources

Exoplanet detection in angular differential imaging by statistical learning of the nonstationary patch covariances

Astronomy & Astrophysics, 2018
Context. The detection of exoplanets by direct imaging is an active research topic in astronomy. Even with the coupling of an extreme adaptive-optics system with a coronagraph, it remains challenging due to the very high contrast between the host star ...
Olivier Flasseur, L. Denis, É. Thiébaut, M. Langlois   +3 more
semanticscholar   +1 more source

A Candidate Giant Planet Companion to the Massive, Young White Dwarf GALEX J071816.4+373139 Informs the Occurrence of Giant Planets Orbiting B Stars

The Astronomical Journal
It has been suggested that giant planet occurrence peaks for stars with M _*  ≈ 3 M _⊙ at a value a factor of 4 higher than observed for solar-mass stars.
Sihao Cheng, Kevin C. Schlaufman, Ilaria Caiazzo   +2 more
doaj   +1 more source

Prehistory of Transit Searches

, 2018
Nowadays the more powerful method to detect extrasolar planets is the transit method. We review the planet transits which were anticipated, searched, and the first ones which were observed all through history. Indeed transits of planets in front of their
A Helden Van, A Lecavelier des Etangs, A Lecavelier des Etangs, AM Lagrange, D Belorizky, D Lardner, DM Kipping, E Ledger, E Piggot, EJ Korpela, FJ Baumgartner, G Galilei, G Rémy, Goodricke, H Deeg, J Kepler, J Kepler, J Kepler, J Napier, J Schneider, J Schneider, J Tarde, JM Vaquero, L. R. Doyle, Laurance R. Doyle, LFA Arnold, M Hoskin, M Mayor, MAC Perryman, N Copernicus, O Struve, P Gassendi, R Lallemand, Strand KAa, UJ Verrier Le, VB Kostov, W Borucki   +36 more
core   +2 more sources

HD 164604 c: A Second Giant Planet on a 15 Yr Orbit and Constraints on the Planet–Planet Mutual Inclination

The Astronomical Journal
We report the discovery of a new massive giant planet, HD 164604 c ( ${a}_{c}=5.55{6}_{-0.10}^{+0.093}$ au, ${e}_{c}=0.19{6}_{-0.078}^{+0.078}$ , and ${m}_{c}=9.{5}_{-1.25}^{+1.2}$ , or $7.{6}_{-1.0}^{+1.0}\,{M}_{{\rm{Jup}}}$ ), orbiting a K3.5 dwarf ...
Guang-Yao Xiao, Fabo Feng, R. Paul Butler, Johanna K. Teske, Stephen A. Shectman, Jeffrey D. Crane, Sharon X. Wang   +6 more
doaj   +1 more source

Microlensing path parametrization for Earth-like Exoplanet detection around solar mass stars

, 2018
We propose a new parametrization of the impact parameter u0 and impact angle {\alpha} for microlensing systems composed by an Earth-like Exoplanet around a Solar mass Star at 1 AU.
de Almeida, L., Nascimento Jr, J. -D. do
core   +2 more sources

The Interpolation Constraint in the RV Analysis of M Dwarfs Using Empirical Templates

The Astronomical Journal
Precise radial velocity (pRV) measurements of M dwarfs in the near-infrared rely on empirical templates due to the lack of accurate stellar spectral models in this regime.
Dhvani Doshi, Nicolas B. Cowan, Étienne Artigau, René Doyon, André M. Silva, Khaled Al Moulla, Yashar Hezaveh   +6 more
doaj   +1 more source