Results 51 to 60 of about 2,941,415 (239)

Predictions of the Nancy Grace Roman Space Telescope Galactic Exoplanet Survey. II. Free-floating Planet Detection Rates [PDF]

Astronomical Journal, 2020
The Nancy Grace Roman Space Telescope (Roman) will perform a Galactic Exoplanet Survey (RGES) to discover bound exoplanets with semimajor axes greater than 1 au using gravitational microlensing. Roman will even be sensitive to planetary-mass objects that
Samson A. Johnson, M. Penny, B. Gaudi, E. Kerins, N. Rattenbury, Annie C. Robin, S. Calchi Novati, Calen Henderson   +7 more
semanticscholar   +1 more source

GPI PSF subtraction with TLOCI: the next evolution in exoplanet/disk high-contrast imaging [PDF]

Astronomical Telescopes and Instrumentation, 2014
To directly image exoplanets and faint circumstellar disks, the noisy stellar halo must be suppressed to a high level. To achieve this feat, the angular differential imaging observing technique and the least-squares Locally Optimized Combination of ...
C. Marois, C. Correia, R. Galicher, P. Ingraham, B. Macintosh, T. Currie, R. D. de Rosa   +6 more
semanticscholar   +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

Exoplanet Geology: What Can We Learn from Current and Future Observations? [PDF]

Reviews in Mineralogy & Geochemistry
Nearly 30 years after the discovery of the first exoplanet around a main sequence star, thousands of planets have now been confirmed. These discoveries have completely revolutionized our understanding of planetary systems, revealing types of planets ...
Bradford J. Foley
semanticscholar   +1 more source

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

Demographics of M Dwarf Binary Exoplanet Hosts Discovered by TESS [PDF]

Astronomical Journal
M dwarfs have become increasingly important in the detection of exoplanets and the study of Earth-sized planets and their habitability. However, 20%–30% of M dwarfs have companions that can impact the formation and evolution of planetary systems.
R. Matson, Rebecca Gore, S. Howell, D. Ciardi, J. Christiansen, C. A. Clark, I. Crossfield, S. Fajardo-Acosta, R. Fernandes, E. Furlan, E. Gilbert, E. Gonzales, K. Lester, M. Lund, E. Matthews, A. Polanski, J. Schlieder, C. Ziegler   +17 more
semanticscholar   +1 more source

A Population of Very-Hot Super-Earths in Multiple-Planet Systems Should be Uncovered by Kepler

, 2010
We simulate a Kepler-like observation of a theoretical exoplanet population and we show that the observed orbital period distribution of the Kepler giant planet candidates is best matched by an average stellar specific dissipation function Q_* in the ...
Batalha, Batalha, Borucki, Bryson, Caldwell, Dobbs-Dixon, Ford, Fortney, Gu, Haas, Ibgui, Ida, Ida, Ida, Jackson, Jackson, Jackson, Jenkins, Jenkins, Koch, Levrard, Mardling, Masset, Miller, Ogihara, Ogilvie, Ogilvie, Reid, Rocha-Pinto, Rocha-Pinto, Sandquist, Schlaufman, Schlaufman, Seager, Winn   +34 more
core   +1 more source

Exoplanet Magnetic Fields [PDF]

Reviews in Mineralogy & Geochemistry
Planetary magnetic fields are important indicators of planetary processes and evolution, from a planet's outer core to its surface (if it possesses one) to its atmosphere and near-space environment. Magnetic fields are most directly measured in situ, and
D. Brain, M. Kao, J. G. O'Rourke
semanticscholar   +1 more source

Signatures of Atmospheric Mass Loss and Planet Migration in the Time Evolution of Short-period Transiting Exoplanets [PDF]

Astronomical Journal
Comparative studies of young and old exoplanet populations offer a glimpse into how planets may form and evolve with time. We present an occurrence rate study of short-period (
R. Fernandes, Galen J. Bergsten, G. Mulders, I. Pascucci, K. Hardegree-Ullman, S. Giacalone, J. Christiansen, James G. Rogers, Akash Gupta, R. Dawson, T. Koskinen, Kiersten M. Boley, J. Curtis, Katia Cunha, E. Mamajek, Sabina Sagynbayeva, S. Bhure, D. Ciardi, P. Karpoor, K. Pearson, Jon K. Zink, G. Feiden   +21 more
semanticscholar   +1 more source

Ages for exoplanet host stars

, 2018
Age is an important characteristic of a planetary system, but also one that is difficult to determine. Assuming that the host star and the planets are formed at the same time, the challenge is to determine the stellar age.
A Claret, A Fogtmann-Schulz, A Skumanich, AHMJ Triaud, AJ Burgasser, AM Serenelli, Andrew W. Mann, Andrew W. Mann, Andrew W. Mann, Andrew W. Mann, B Durney, BR Jørgensen, CP Folsom, CP Folsom, D Huber, D Segransan, DR Soderblom, DR Soderblom, E Sandford, EE Mamajek, F Pont, FR Chromey, G Somers, Gaia Collaboration, Brown AGA, Vallenari A et al, H Rauer, JL Saders van, JN Connelly, K Zwintz, L Casagrande, M Asplund, M Gillon, MJ Thompson, P Sestito, PFL Maxted, PFL Maxted, R Hanbury Brown, R.D. Jeffries, RS Booth, Rudolf Kippenhahn, S Basu, S Deheuvels, S Meibom, S Meibom, S Meibom, S Meibom, SA Barnes, SA Barnes, SA Barnes, T. L. Campante, Tabetha S. Boyajian, TD Brandt, TM Brown, TR White, V Silva Aguirre, V Silva Aguirre   +54 more
core   +1 more source