Results 81 to 90 of about 2,690,574 (274)

Effects of rotation and magnetic fields on the lithium abundance and asteroseismic properties of exoplanet-host stars

, 2010
Aims: The effects of rotation and magnetic fields on the surface abundances of solar-type stars are studied in order to investigate whether the reported difference in lithium content of exoplanet-host stars can be related to their rotational history ...
A. Maeder, Asplund, Bouvier, Castro, Chaboyer, Chaplin, Charbonneau, Charbonnel, Christensen-Dalsgaard, Denissenkov, Denissenkov, Denissenkov, Eggenberger, Eggenberger, G. Meynet, Gellert, Irwin, Israelian, Krishnamurthi, Kumar, Mestel, P. Eggenberger, Paquette, Pinsonneault, Pinsonneault, Schatzman, Soderblom, Spruit, Talon, Zahn, Zahn   +30 more
core   +1 more source

Spectral Evolution of an Earth-Like Planet [PDF]

, 2006
We have developed a characterization of the geological evolution of the Earths atmosphere and surface in order to model the observable spectra of an Earth-like planet through its geological history.
Cloud P. E., Kenneth W. Jucks, Lisa Kaltenegger, Lovelock J. E., Wesley A. Traub   +4 more
core   +2 more sources

Conclusive Evidence for a Population of Water Worlds around M Dwarfs Remains Elusive

The Astrophysical Journal Letters, 2023
The population of small, close-in exoplanets is bifurcated into super-Earths and sub-Neptunes. We calculate physically motivated mass–radius relations for sub-Neptunes, with rocky cores and H/He-dominated atmospheres, accounting for their thermal ...
James G. Rogers, Hilke E. Schlichting, James E. Owen   +2 more
doaj   +1 more source

Theoretical Spectra of Terrestrial Exoplanet Surfaces [PDF]

, 2012
We investigate spectra of airless rocky exoplanets with a theoretical framework that self-consistently treats reflection and thermal emission. We find that a silicate surface on an exoplanet is spectroscopically detectable via prominent Si-O features in ...
Batalha, Best, Bethany L. Ehlmann, Borucki, Borucki, Cheek, Clark, Clark, Cochran, Cowan, de Pater, Drilling, Farmer, Gautier, Koch, Miller-Ricci, Muirhead, Pieters, Pieters, RELAB Spectral Database, Renyu Hu, Rogers, Salisbury, Sara Seager, Seager, Seager, Sobolev, Sprague, Winn   +28 more
core   +2 more sources

The Architectural Design Rules of Solar Systems based on the New Perspective

, 2009
On the basis of the Lunar Laser Ranging Data released by NASA on the Silver Jubilee Celebration of Man Landing on Moon on 21st July 1969-1994, theoretical formulation of Earth-Moon tidal interaction was carried out and Planetary Satellite Dynamics was ...
A Johnson, AN Halliday, Bijay Kumar Sharma, BK Sharma, C Broeg, C Hellier, CL Cook, D Apes, DD Sasselov, DD Sasselov, DP Rubicam, F Marzari, G Israelian, GA Krasinsky, GA Krasinsky, GE Williams, GH Darwin, GH Darwin, H Tanaka, JE Chambers, JJ Dukla, JJ Lissauer, JP Zahn, KJ Epstein, M Reidemeister, ME Zolansky, N Murray, NC Santos, P Goldreich, RP Nelson, S Ida, S Leschiutta, SN Cuzzi, T Jong de   +33 more
core   +1 more source

Climate Modeling of a Potential ExoVenus [PDF]

, 2018
The planetary mass and radius sensitivity of exoplanet discovery capabilities has reached into the terrestrial regime. The focus of such investigations is to search within the Habitable Zone where a modern Earth-like atmosphere may be a viable comparison.
Ceja, Alma Y., Kane, Stephen R., Quintana, Elisa V., Way, Michael J.   +3 more
core   +4 more sources

The influence of host star activity evolution on the population of super-Earths and mini-Neptunes [PDF]

, 2022
The detected exoplanet population displays a dearth of planets with sizes of about two Earth radii, the so-called radius gap. This is interpreted as an evolutionary effect driven by a variety of possible atmospheric mass loss processes of exoplanets. For mass loss driven by an exoplanet's irradiation by stellar X-ray and extreme-UV photons, the time ...
arxiv   +1 more source

"Retired" Planet Hosts: Not So Massive, Maybe Just Portly After Lunch

, 2011
Studies of the planet abundance as a function of stellar mass have suggested a strong increase in the frequency of planet occurrence around stars more massive than $1.5 M_\odot$, and that such stars are deficit in short period planets.
Allende Prieto, Ayres, Baines, Bowler, Cassisi, Cassisi, Charbonnel, Crepp, Eggleton, Fischer, Glebocki, Hansen, Johnson, Johnson, Kane, Kim, Matsumura, McCarthy, Paxton, Penev, Reffert, Schlawin, Seager, Takeda, Valenti, van Belle, Villaver, Yi   +27 more
core   +1 more source

Unveiling the atmospheric evolution of exoplanets

, 2021
A thorough characterisation of an exoplanetary system includes also studying the evolution of planetary atmospheres. To this end, we developed a custom tool to estimate the atmospheric content of exoplanets at the dispersal of the protoplanetary disk accounting for the present day system observables. In detail, our tool relies on planetary evolutionary
openaire   +1 more source

Fleeting but Not Forgotten: The Imprint of Escaping Hydrogen Atmospheres on Super-Earth Interiors

The Astrophysical Journal
Small, close-in exoplanets are divided into two subpopulations: super-Earths and sub-Neptunes. Most super-Earths are thought to have lost their primordially accreted hydrogen-dominated atmospheres via thermally driven winds.
James G. Rogers, Hilke E. Schlichting, Edward D. Young   +2 more
doaj   +1 more source