Results 91 to 100 of about 828 (196)

Are WASP-107-like Systems Consistent with High-eccentricity Migration?

The Astrophysical Journal
WASP-107 b seems to be a poster child of the long-suspected high-eccentricity migration scenario. It is on a 5.7 day, polar orbit. The planet is Jupiter-like in radius but Neptune-like in mass with exceptionally low density.
Hang Yu, Fei Dai
doaj   +1 more source

Searching for Snapshots of Giant Exoplanet Migration

NEID, an extreme precision Doppler spectrograph on the WIYN 3.5-meter Telescope at Kitt Peak National Observatory (a partnership between Indiana University, University of Wisconsin-Madison, Pennsylvania State University, Princeton University,Purdue University, NSF’s NOIRLab, and NASA), is helping unravel the origin of hot Jupiters.
openaire   +3 more sources

Hot exoplanet atmospheres resolved with transit spectroscopy (HEARTS) : II. A broadened sodium feature on the ultra-hot giant WASP-76b [PDF]

, 2019
High-resolution optical spectroscopy is a powerful tool to characterise exoplanetary atmospheres from the ground. The sodium D lines, with their large cross sections, are especially suited to studying the upper layers of atmospheres in this context.
Ehrenreich, D., Pino, L., Cegla, H. M., Bayliss, D., C. Lovis, Seidel, J.V., K. Heng, A. Wyttenbach, N. Astudillo-Defru, M. Lendl, C. Fisher, B. Lavie, Seidel, J. V., Barrado, D., D. Ségransan, Deline, A., D. Bayliss, Bourrier, V., Heng, K., Pepe, F., H. M. Cegla, Ségransan, D., D. Ehrenreich, C. Melo, L. Pino, F. Pepe, Udry, S., Lavie, Baptiste, Heng, Kevin, A. Deline, Cegla, H.M., D. Barrado, Wyttenbach, A., Allart, R., Fisher, C., V. Bourrier, Joseph, R., Lavie, B., Melo, C., Lendl, M., Astudillo-Defru, N., R. Joseph, Pino, Lorenzo, Lovis, C., S. Udry, J. V. Seidel, R. Allart   +46 more
core   +1 more source

Spin-Orbit Alignment for the Eccentric Exoplanet HD 147506b [PDF]

, 2007
The short-period exoplanet HD 147506b (also known as HAT-P-2b) has an eccentric orbit, raising the possibility that it migrated through planet-planet scattering or Kozai oscillations accompanied by tidal dissipation.
Winn, Joshua N., Peek, Kathryn M. G., Suto, Yasushi, Johnson, John Asher, Enya, Keigo, Turner, Edwin L., Vogt, Steven S., Marcy, Geoffrey W., Bakos, Gaspar Á., Narita, Norio   +9 more
core  

Infrared Observations of Exoplanet Atmospheres [PDF]

, 2012
The study of extrasolar planet atmospheres elucidates the formation and migration history of planets and places the origin and evolution of Earth and the Solar System in a broader context.
Crossfield, Ian James Mills
core  

TESS Giants Transiting Giants. VI. Newly Discovered Hot Jupiters Provide Evidence for Efficient Obliquity Damping after the Main Sequence

The Astronomical Journal
The degree of alignment between a star’s spin axis and the orbital plane of its planets (the stellar obliquity) is related to interesting and poorly understood processes that occur during planet formation and evolution.
Nicholas Saunders, Samuel K. Grunblatt, Ashley Chontos, Fei Dai, Daniel Huber, Jingwen Zhang, Guđmundur Stefánsson, Jennifer L. van Saders, Joshua N. Winn, Daniel Hey, Andrew W. Howard, Benjamin Fulton, Howard Isaacson, Corey Beard, Steven Giacalone, Judah Van Zandt, Joseph M. Akana Murphey, Malena Rice, Sarah Blunt, Emma Turtelboom, Paul A. Dalba, Jack Lubin, Casey Brinkman, Emma M. Louden, Emma Page, Cristilyn N. Watkins, Karen A. Collins, Chris Stockdale, Thiam-Guan Tan, Richard P. Schwarz, Bob Massey, Steve B. Howell, Andrew Vanderburg, George R. Ricker, Jon M. Jenkins, Sara Seager, Jessie L. Christiansen, Tansu Daylan, Ben Falk, Max Brodheim, Steven R. Gibson, Grant M. Hill, Bradford Holden, Aaron Householder, Stephen Kaye, Russ R. Laher, Kyle Lanclos, Erik A. Petigura, Arpita Roy, Ryan A. Rubenzahl, Christian Schwab, Abby P. Shaum, Martin M. Sirk, Christopher L. Smith, Josh Walawender, Sherry Yeh   +55 more
doaj   +1 more source

Planetary Migration in Protoplanetary Disks [PDF]

, 2018
The known exoplanet population displays a great diversity of orbital architectures, and explaining the origin of this is a major challenge for planet formation theories.
NELSON, RP, Richard P. Nelson
core   +1 more source

Where Are the Water Worlds? Identifying Exo-water-worlds Using Models of Planet Formation and Atmospheric Evolution

The Astrophysical Journal
Planet formation models suggest that the small exoplanets that migrate from beyond the snowline of the protoplanetary disk likely contain water-ice-rich cores (∼50% by mass), also known as water worlds.
Aritra Chakrabarty, Gijs D. Mulders
doaj   +1 more source

Thermal Emission and Confirmation of the Frigid White Dwarf Exoplanet WD 1856+534 b [PDF]

We report the detection of thermal emission from and confirm the planetary nature of WD 1856+534 b, the first transiting planet known to orbit a white dwarf (WD) star.
Ryan J. MacDonald, Sydney Jenkins, David K. Sing, Emily Rauscher, Caroline V. Morley, Rachel Bowens-Rubin, Elena Gallo, Kevin B. Stevenson, James Mang, Alexander Venner, Christopher O’Connor, Mary Anne Limbach, Andrew Vanderburg, Simon Blouin, Siyi Xu   +14 more
core   +1 more source

Most Hot Jupiters Were Cool Giant Planets for More Than 1 Gyr

The Astronomical Journal
The origin of hot Jupiters is the oldest problem in exoplanet astrophysics. Hot Jupiters formed in situ or via disk migration should be in place just a few million years after the formation of their host stars.
Stephen P. Schmidt, Kevin C. Schlaufman
doaj   +1 more source