Results 121 to 130 of about 54,418 (256)

White Dwarf Stars in the Big Data Era

Astronomische Nachrichten, Volume 346, Issue 1, January 2025.
ABSTRACT White dwarf stars are the most common endpoint of stellar evolution. Therefore, these old, numerous and compact objects provide valuable information on the late stages of stellar evolution, the physics of dense plasma and the structure and evolution of our Galaxy.
Maria Camisassa
wiley   +1 more source

Microlensing Searches for Exoplanets [PDF]

Geosciences, 2018
Gravitational microlensing finds planets through their gravitational influence on the light coming from a more distant background star. The presence of the planet is then inferred from the tell-tale brightness variations of the background star during the lensing event, even if no light is detectable from the planet or the host foreground star.
openaire   +4 more sources

Identifying Exoplanets with Deep Learning II: Two New Super-Earths Uncovered by a Neural Network in K2 Data [PDF]

, 2019
For years, scientists have used data from NASA's Kepler Space Telescope to look for and discover thousands of transiting exoplanets. In its extended K2 mission, Kepler observed stars in various regions of sky all across the ecliptic plane, and therefore in different galactic environments.
arxiv   +1 more source

A Helicity-Based Method to Infer the CME Magnetic Field Magnitude in Sun and Geospace: Generalization and Extension to Sun-Like and M-Dwarf Stars and Implications for Exoplanet Habitability

, 2017
Patsourakos et al. (Astrophys. J. 817, 14, 2016) and Patsourakos and Georgoulis (Astron. Astrophys. 595, A121, 2016) introduced a method to infer the axial magnetic field in flux-rope coronal mass ejections (CMEs) in the solar corona and farther away in ...
A. Isavnin, A. Kumar, A. Nindos, A. Nindos, A. Nindos, A. Thernisien, A. Vourlidas, A.A. Vidotto, A.A. Vidotto, A.N. Aarnio, B. Gladman, B. Kliem, B. Vrsnak, B. Vršnak, B.E. Wood, B.J. Lynch, B.J. Lynch, B.J. Lynch, B.M. Jakosky, C. Cid, C. Garraffo, C. Karoff, C. Kay, C. Kay, C. Möstl, C.-C. Wu, C.H. Mandrini, C.J. Schrijver, C.R. DeVore, D. Cunha, D. Nogami, D.J. Armstrong, E. Bosman, E. Pariat, E.A. Jensen, E.R. Houdebine, E.R. Priest, E.W. Cliver, F. Selsis, G. Anglada-Escudé, G. Aulanier, G. Chintzoglou, G. Torres, G. Valori, G.A. Gary, H. Lammer, H. Maehara, I.G. Usoskin, J. Leconte, J. Scalo, J.-F. Donati, J.-M. Grießmeier, J.-M. Grießmeier, J.F. Kasting, J.J. Drake, J.R.A. Davenport, K. Hariharan, K. Moraitis, K. Shibata, K. Tziotziou, K. Tziotziou, L.K. Harra, L.M. Green, M. Leitner, M. Leitzinger, M. Leitzinger, M. Patzold, M. Semel, M. Vandas, M.A. Berger, M.A. Hidalgo, M.D. Andrews, M.D. Kazachenko, M.K. Georgoulis, M.K. Georgoulis, M.L. Khodachenko, M.L. Luoni, M.S. Nakwacki, N. Al-Haddad, N.P. Savani, P. Démoulin, P. Démoulin, P. Démoulin, P. MacNeice, P. Riley, Q. Hu, R. Kataoka, R. Osten, R.A. Osten, R.J. Forsyth, R.M. Winslow, R.P. Lepping, S. Chapman, S. Dasso, S. Lundquist, S. Mancuso, S. Patsourakos, S. Patsourakos, S. Régnier, S. Toriumi, S. Yashiro, S.D. Tun, S.E. Gibson, S.R. Kane, S.W. Good, T. Gold, T. Nieves-Chinchilla, T. Shibayama, T.A. Howard, T.G. Forbes, T.S. Bastian, V. Bothmer, V. Kunkel, V. See, V.S. Airapetian, W. Poomvises, X. Sun, Y. Guo, Y. Liu, Y. Wang   +119 more
core   +1 more source

Transiting Exoplanets with JWST

, 2008
The era of exoplanet characterization is upon us. For a subset of exoplanets -- the transiting planets -- physical properties can be measured, including mass, radius, and atmosphere characteristics.
A. Burrows, A. Burrows, A. Vidal-Madjar, A. Wolszczan, A.P. Showman, B.S. Gaudi, D. Charbonneau, D. Charbonneau, D. Deming, D. Deming, D. Ehrenreich, D. Ehrenreich, D. Valencia, D.J. Des Marais, G. Basri, G. Chauvin, G. Chauvin, G. Tinetti, G.G. Fazio, G.H. Rieke, H.A. Knutson, H.A. Knutson, I. Hubeny, J. Harrington, J. Harrington, J. Lederberg, J.A. Valenti, J.E. Lovelock, J.P. Gardner, J.R. Houck, L. Zeng, L.J. Richardson, M. Gillon, M. Gillon, M. Morales-Calderòn, M.R. Swain, N.B. Cowan, P. Nutzman, P.H. Hauschildt, P.R. Christensen, R. Neuhäuser, R. Silvotti, R.L. Kurucz, R.P. Butler, R.P. Butler, S. Redfield, S. Seager, S. Seager, T.M. Brown, T.M. Brown   +49 more
core   +1 more source

Editorial: Challenges of asteroseismology in the era of space missions

Frontiers in Astronomy and Space Sciences, 2022
Javier Pascual-Granado, Tiago Campante, Antonio García Hernández, Zhao Guo   +3 more
doaj   +1 more source

The Gl 229 System Revisited with the Line-by-line Framework: Planetary Signals Now Appear as Stellar Activity Ghosts

The Astronomical Journal
Gl 229 is a well-known system hosting the first confirmed brown dwarf (BD), Gl 229 B, discovered in 1995. Subsequent radial velocity (RV) follow-up of the star unveiled, in 2014, an exoplanet on a 471 days orbit with a minimum mass of  ∼32 M _⊕ . In 2020,
Ariane Deslières, Charles Cadieux, René Doyon, Étienne Artigau, Neil J. Cook, Clémence Fontanive, Thomas Vandal   +6 more
doaj   +1 more source

The Radiation Environment of Exoplanet Atmospheres

Challenges, 2014
Exoplanets are born and evolve in the radiation and particle environment created by their host star. The host star’s optical and infrared radiation heats the exoplanet’s lower atmosphere and surface, while the ultraviolet, extreme ultraviolet and X ...
Jeffrey L. Linsky
doaj   +1 more source

Multi-Wavelength High-Resolution Spectroscopy for Exoplanet Detection: Motivation, Instrumentation and First Results

Geosciences, 2018
Exoplanet research has shown an incessant growth since the first claim of a hot giant planet around a solar-like star in the mid-1990s. Today, the new facilities are working to spot the first habitable rocky planets around low-mass stars as a forerunner ...
Serena Benatti
doaj   +1 more source

Multiplicity-Study of Exoplanet Host Stars [PDF]

arXiv, 2005
We carry out a systematic search campaign for wide companions of exoplanet host stars to study their multiplicity and its influence on the long-term stability and the orbital parameters of the exoplanets. We have already found 6 wide companions, raising the number of confirmed binaries among the exoplanet host stars to 20 systems. We have also searched
arxiv