Results 51 to 60 of about 4,693,249 (249)

Measuring Elemental Abundances of JWST Target Stars for Exoplanet Characterization. I. FGK Stars [PDF]

Astronomical Journal, 2021
With the launch of the JWST, we will obtain more precise data for exoplanets than ever before. However, these data can only inform and revolutionize our understanding of exoplanets when placed in the larger context of planet–star formation.
Jared R. Kolecki, J. Wang 王
semanticscholar   +1 more source

Exoplanet albedo spectra and colors as a function of planet phase, separation, and metallicity [PDF]

, 2010
First generation optical coronagraphic telescopes will obtain images of cool gas and ice giant exoplanets around nearby stars. The albedo spectra of exoplanets at planet-star separations larger than about 1 AU are dominated by reflected light to beyond 1
Ackerman, Alibert, Beichman, Boss, Brown, Burrows, Burrows, Burrows, Chapman, Chapman, Conrath, Dlugach, Dodson-Robinson, Dyudina, Fortney, Fortney, Fortney, Fortney, Fortney, Fortney, Freedman, Gautier, Gautier, Guillot, Guillot, Guyon, Ida, Jonathan J. Fortney, Kasdin, Kerri L. Cahoy, Kratter, Kuchner, Lafreniere, Liou, Lodders, Lodders, Lodders, Mark S. Marley, Marley, Marley, Marley, Marley, Marois, Mawet, Mihilas, Rauscher, Saumon, Saumon, Seager, Sobolev, Spiegel, Stephens, Sudarsky, Sudarsky, Sudarsky, Traub, Veras, West, Zahnle   +58 more
core   +2 more sources

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

Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems [PDF]

, 2006
We present results of a reconnaissance for stellar companions to all 131 radial-velocity-detected candidate extrasolar planetary systems known as of July 1, 2005.
Beaulieu, Thom D., Hambly, Nigel C., Henry, Todd J., Jao, Wei-Chun, Mason, Brian D., Raghavan, Deepak, Subasavage, John P.   +6 more
core   +2 more sources

From Methane to Nanodiamond Precursors in Water: Superacid‐like Condensation Pathways Under Extreme Conditions

Angewandte Chemie, EarlyView.
Under extreme pressure and temperature, superionic water acts as a strong superacid, catalyzing methane polycondensation through pentacoordinated carbonium ions (CH5+). This discovery reveals the non‐classical carbocation chemistry underlying the early stages of diamond formation in water under extreme conditions.
Thomas Thévenet, Axel Dian, Matteo Cioni, Alexis Markovits, Sandro Scandolo, Arthur France‐Lanord, Flavio Siro Brigiano   +6 more
wiley   +2 more sources

Radial velocity eclipse mapping of exoplanets [PDF]

, 2015
Planetary rotation rates and obliquities provide information regarding the history of planet formation, but have not yet been measured for evolved extrasolar planets.
Barnes J. W., Correia A. C. M., Cowan N. B., Cox A. N., de Pater I., Faure G., Felix Sainsbury-Martinez, Fujii Y., Guillot T., Heller R., Hirano T., Hui L., Kataria T., Kawahara H., Kawahara H., Mandel K., Markwardt C. B., Murray C. D, Nikolay Nikolov, Ohta Y., Pallé E., Paz-Chinchón F., Seager S., Winn J. N.   +23 more
core   +2 more sources

The Giant Accreting Protoplanet Survey (GAPlanetS)—Results from a 6 yr Campaign to Image Accreting Protoplanets

The Astronomical Journal, 2023
Accreting protoplanets are windows into planet formation processes, and high-contrast differential imaging is an effective way to identify them. We report results from the Giant Accreting Protoplanet Survey (GAPlanetS), which collected H α differential ...
Katherine B. Follette, Laird M. Close, Jared R. Males, Kimberly Ward-Duong, William O. Balmer, Jéa Adams Redai, Julio Morales, Catherine Sarosi, Beck Dacus, Robert J. De Rosa, Fernando Garcia Toro, Clare Leonard, Bruce Macintosh, Katie M. Morzinski, Wyatt Mullen, Joseph Palmo, Raymond Nzaba Saitoti, Elijah Spiro, Helena Treiber, Kevin Wagner, Jason Wang, David Wang, Alex Watson, Alycia J. Weinberger   +23 more
doaj   +1 more source

Kepler-1656b: a Dense Sub-Saturn With an Extreme Eccentricity [PDF]

, 2018
Kepler-1656b is a 5 $R_E$ planet with an orbital period of 32 days initially detected by the prime Kepler mission. We obtained precision radial velocities of Kepler-1656 with Keck/HIRES in order to confirm the planet and to characterize its mass and ...
Brady, Madison T., Fulton, Benjamin J., Hirsch, Lea A., Howard, Andrew W., Isaacson, Howard, Knutson, Heather A., Kosiarek, Molly R., Petigura, Erik A., Sinukoff, Evan   +8 more
core   +2 more sources

Hydrogen sulfide and metal-enriched atmosphere for a Jupiter-mass exoplanet [PDF]

Nature
As the closest transiting hot Jupiter to Earth, HD 189733b has been the benchmark planet for atmospheric characterization1–3. It has also been the anchor point for much of our theoretical understanding of exoplanet atmospheres from composition4 ...
Guangwei Fu, L. Welbanks, D. Deming, J. Inglis, Michael Zhang, J. Lothringer, Jegug Ih, J. Moses, E. Schlawin, H. Knutson, Gregory W. Henry, Thomas P. Greene, David K. Sing, A. Savel, E. Kempton, D. Louie, M. Line, M. Nixon   +17 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