Results 41 to 50 of about 123,043 (207)

The effect of planet-planet scattering on the survival of exomoons

, 2013
Compared to the giant planets in the solar system, exoplanets have many remarkable properties such as the prevalence of giant planets on eccentric orbits and the presence of hot Jupiters. Planet-planet scattering (PPS) between giant planets is a possible
Gong, Yan-Xiang, Wu, Xiao-Mei, Xie, Ji-Wei, Zhou, Ji-Lin   +3 more
core   +1 more source

Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity [PDF]

, 2014
(abridged) We have obtained precise radial velocities for a sample of 373 G and K type giants at Lick Observatory regularly over more than 12 years. Planets have been identified around 15 giant stars; an additional 20 giant stars host planet candidates ...
Bergmann, Christoph, Künstler, Andreas, Quirrenbach, Andreas, Reffert, Sabine, Trifonov, Trifon   +4 more
core   +2 more sources

Characterization of extrasolar giant planets with machine learning [PDF]

, 2023
J. Li, Lisa Kaltenegger, Dang Pham, David Ruppert   +3 more
openalex   +1 more source

Breaking Giant Chains: Early-stage Instabilities in Long-period Giant Planet Systems

The Astrophysical Journal
Orbital evolution is a critical process that sculpts planetary systems, particularly during their early stages where planet–disk interactions are expected to lead to the formation of resonant chains.
Vighnesh Nagpal, Max Goldberg, Konstantin Batygin   +2 more
doaj   +1 more source

A Massive Hot Jupiter Orbiting a Metal-rich Early M Star Discovered in the TESS Full-frame Images

The Astronomical Journal, 2023
Observations and statistical studies have shown that giant planets are rare around M dwarfs compared with Sun-like stars. The formation mechanism of these extreme systems has remained under debate for decades. With the help of the TESS mission and ground-
Tianjun Gan, Charles Cadieux, Farbod Jahandar, Allona Vazan, Sharon X. Wang, Shude Mao, Jaime A. Alvarado-Montes, D. N. C. Lin, Étienne Artigau, Neil J. Cook, René Doyon, Andrew W. Mann, Keivan G. Stassun, Adam J. Burgasser, Benjamin V. Rackham, Steve B. Howell, Karen A. Collins, Khalid Barkaoui, Avi Shporer, Jerome de Leon, Luc Arnold, George R. Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Artem Burdanov, David Charbonneau, Georgina Dransfield, Akihiko Fukui, Elise Furlan, Michaël Gillon, Matthew J. Hooton, Hannah M. Lewis, Colin Littlefield, Ismael Mireles, Norio Narita, Chris W. Ormel, Samuel N. Quinn, Ramotholo Sefako, Mathilde Timmermans, Michael Vezie, Julien de Wit   +43 more
doaj   +1 more source

Oligarchic and giant impact growth of terrestrial planets in the presence of gas giant planet migration

, 2005
We present the results of N--body simulations which examine the effect that gas giant planet migration has on the formation of terrestrial planets. The models incorporate a 0.5 Jupiter mass planet undergoing type II migration through an inner protoplanet-
Adachi, Agnor, Alibert, Armitage, Butler, Chambers, Chambers, Fischer, Goldreich, Golreich, Haisch, Hayashi, Kasting, Kokubo, Kokubo, Kominami, Laughlin, Lin, Lin, Lineweaver, Lineweaver, Lissauer, M. J. Fogg, Mandell, Mayor, McArthur, Menou, Nelson, Nelson, Ogilvie, Papaloizou, Papaloizou, Papaloizou, Pollack, Quillen, R. P. Nelson, Rasio, Santos, Santos, Snellgrove, Tanaka, Terquem, Thommes, Thommes, Thommes, Udry, Ward, Wyatt   +47 more
core   +1 more source

Giant Outer Transiting Exoplanet Mass (GOT ‘EM) Survey. V. Two Giant Planets in Kepler-511 but Only One Ran Away

The Astronomical Journal
Systems hosting multiple giant planets are important laboratories for understanding planetary formation and migration processes. We present a nearly decade-long Doppler spectroscopy campaign from the HIRES instrument on the Keck-I telescope to ...
Yayaati Chachan, Paul A. Dalba, Daniel P. Thorngren, Stephen R. Kane, Howard Isaacson, Eve J. Lee, Edward W. Schwieterman, Andrew W. Howard, Matthew J. Payne   +8 more
doaj   +1 more source

On the correlation between metallicity and the presence of giant planets

, 2009
The correlation between stellar metallicity and the presence of giant planets is well established. It has been tentatively explained by the possible increase of planet formation probability in stellar disks with enhanced amount of metals.
Ida, Jackson, Kennicutt, M. Haywood, Maciel, Mordasini, Nakanishi, Quillen, Robinson, Schoenrich, Takeda, Takeda, Wielen   +12 more
core   +1 more source

Modeling Planetary System Formation with N-Body Simulations: Role of Gas Disk and Statistics Comparing to Observations

, 2011
During the late stage of planet formation when Mars-size cores appear, interactions among planetary cores can excite their orbital eccentricities, speed their merges and thus sculpture the final architecture of planet systems.
Andrews, Armitage, Chatterjee, Fischer, Garaud, Gullbring, Haisch, Huigen Liu, Ida, Ida, Ida, Ida, Ikoma, Ji-Lin Zhou, Johnson, Jurić, Kennedy, Kokubo, Kretke, Kretke, Laughlin, Lee, Lin, Lin, Nagasawa, Ogihara, Rafikov, Safronov, Sano, Shakura, Su Wang, Tanaka, Terquem, Vorobyov, Wang, Wittenmyer, Wright, Zhou, Zhou   +38 more
core   +1 more source

Searching for GEMS: TOI-7149 b, an Inflated Giant Planet Causing a 12% Transit of a Fully Convective M-dwarf

The Astronomical Journal
We describe the discovery and characterization of TOI-7149 b, a 0.705 ± 0.075 M _J , 1.18 ± 0.045 R _J gas giant on a ∼2.65 days period orbit transiting an M4V star with a mass of 0.344 ± 0.030 M _⊙ and an effective temperature of 3363 ± 59 K. The planet
Shubham Kanodia, Caleb I. Cañas, Suvrath Mahadevan, Andrea S.J. Lin, Henry A. Kobulnicky, Ian Karfs, Alexina Birkholz, Andrew Monson, Arvind F. Gupta, Mark Everett, Michael Rodruck, Rowen I. Glusman, Te Han, William D. Cochran, Chad F. Bender, Scott A. Diddams, Daniel Krolikowski, Samuel Halverson, Jessica Libby-Roberts, Joe P. Ninan, Paul Robertson, Arpita Roy, Christian Schwab, Gud̃mundur Stefánsson   +23 more
doaj   +1 more source