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Effects of Dynamical Evolution of Giant Planets on Survival of Terrestrial Planets [PDF]

, 2012
The orbital distributions of currently observed extrasolar giant planets allow marginally stable orbits for hypothetical, terrestrial planets. In this paper, we propose that many of these systems may not have additional planets on these "stable" orbits, since past dynamical instability among giant planets could have removed them.
Armitage, Batalha, Chatterjee, Fabrycky, Ford, Ito, Jurić, Levison, Lufkin, Makiko Nagasawa, Mandell, Marchal, Matsumura, Matsuyama, Mayor, Menou, Murray, Nagasawa, Nagasawa, Noble, Schlaufman, Shigeru Ida, Soko Matsumura, Tanaka, Veras, Veras, Wright, Wu, Wu, Zhou   +29 more
arxiv   +3 more sources

Survival of habitable planets in unstable planetary systems [PDF]

, 2016
Many observed giant planets lie on eccentric orbits. Such orbits could be the result of strong scatterings with other giant planets. The same dynamical instability that produces these scatterings may also cause habitable planets in interior orbits to become ejected, destroyed, or be transported out of the habitable zone.
Carrera, Daniel, Davies, Melvyn B., Johansen, Anders   +2 more
arxiv   +3 more sources

Stephen Hawking’s Warning on Contacting Aliens: A Physics Perspective on the Intelligence Trap [PDF]

Journal of Biomedical Physics and Engineering
The search for extraterrestrial intelligence is a fascinating and important endeavor, but it raises significant ethical and safety concerns. In the search for extraterrestrial intelligence, scientists use knowledge of physics to identify potential ...
Seyed Mohammad Javad Mortazavi, Joseph John Bevelacqua, Seyed Alireza Mortazavi, Payman Rafiepour, James S Welsh   +4 more
doaj   +2 more sources

California Legacy Survey. II. Occurrence of Giant Planets beyond the Ice Line [PDF]

Astrophysical Journal Supplement Series, 2021
We used high-precision radial velocity measurements of FGKM stars to determine the occurrence of giant planets as a function of orbital separation spanning 0.03–30 au.
B. Fulton, L. Rosenthal, L. Hirsch, H. Isaacson, A. Howard, C. M. Dedrick, Ilya A. Sherstyuk, S. Blunt, E. Petigura, H. Knutson, A. Behmard, A. Chontos, J. Crepp, I. Crossfield, P. Dalba, D. Fischer, G. Henry, S. Kane, M. Kosiarek, G. Marcy, R. Rubenzahl, L. Weiss, J. Wright   +22 more
semanticscholar   +1 more source

Models of the in Situ Formation of Detected Extrasolar Giant Planets [PDF]

, 2021
We present numerical simulations of the formation of the planetary companions to 47 UMa, ρ CrB, and 51 Peg. They are assumed to have formed in situ according to the basic model that a core formed first by accretion of solid particles, then later it ...
P. Bodenheimer, O. Hubickyj, J. Lissauer
semanticscholar   +1 more source

معتقد التنجيم ورموزه على مسكوكات الجزيرة الفراتية واألناضول خالل القرنين السادس والسابع الهجريين Astrology as a Folk Life on Mesopotamian, and Anatolian Coins from the Sixth to Seventh H.AH Century [PDF]

Journal of General Union of Arab Archaeologists, 2023
{AR} تتناول هذه الورقة البحثية موضوع التنجيم وبعض من رموزه (كالشمس والقمر) التي ظهرت على المسكوكات الإسلامية، في كل من الجزيرة الفراتية والأناضول خلال الفترة ما بين القرن السادس حتى القرن السابع الهجريين، حيث يُعد ظهورها أمر بالغ الأهمية؛ فإذ لم يكن ...
Fatima Mriziq Odeh Abu Shaqqal
doaj   +1 more source

Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1 [PDF]

Nature, 2017
One aim of modern astronomy is to detect temperate, Earth-like exoplanets that are well suited for atmospheric characterization. Recently, three Earth-sized planets were detected that transit (that is, pass in front of) a star with a mass just eight per ...
M. Gillon, A. Triaud, B. Demory, E. Jehin, E. Agol, K. Deck, S. Lederer, J. de Wit, A. Burdanov, J. Ingalls, É. Bolmont, J. Leconte, S. Raymond, F. Selsis, M. Turbet, K. Barkaoui, A. Burgasser, M. Burleigh, S. Carey, A. Chaushev, C. Copperwheat, L. Delrez, C. S. Fernandes, D. Holdsworth, E. Kotze, V. Van Grootel, Y. Almleaky, Z. Benkhaldoun, P. Magain, D. Queloz   +29 more
semanticscholar   +1 more source

The Occurrence of Rocky Habitable-zone Planets around Solar-like Stars from Kepler Data [PDF]

Astronomical Journal, 2020
We present the occurrence rates for rocky planets in the habitable zones (HZs) of main-sequence dwarf stars based on the Kepler DR25 planet candidate catalog and Gaia-based stellar properties.
S. Bryson, M. Kunimoto, R. Kopparapu, J. Coughlin, W. Borucki, D. Koch, V. S. Aguirre, C. Allen, G. Barentsen, N. Batalha, T. Berger, A. Boss, L. Buchhave, C. Burke, D. Caldwell, Jennifer Campbell, J. Catanzarite, H. Chandrasekharan, W. Chaplin, J. Christiansen, J. Christensen-Dalsgaard, D. Ciardi, B. Clarke, W. Cochran, J. Dotson, L. Doyle, E. S. Duarte, E. Dunham, A. Dupree, M. Endl, J. Fanson, E. Ford, Maura Fujieh, T. Gautier, J. Geary, R. Gilliland, F. Girouard, A. Gould, M. Haas, C. Henze, M. Holman, A. Howard, S. Howell, D. Huber, R. Hunter, J. Jenkins, H. Kjeldsen, J. Kolodziejczak, K. Larson, D. Latham, Jie Li, S. Mathur, S. Meibom, C. Middour, R. Morris, T. Morton, F. Mullally, S. Mullally, D. Pletcher, A. Prša, S. Quinn, E. Quintana, D. Ragozzine, S. Ramírez, D. Sanderfer, D. Sasselov, S. Seader, M. Shabram, Avi Shporer, Jeffrey C. Smith, J. Steffen, M. Still, G. Torres, J. Troeltzsch, J. Twicken, A. K. Uddin, J. Cleve, Janice Voss, L. Weiss, W. Welsh, B. Wohler, Khadeejah A. Zamudio   +81 more
semanticscholar   +1 more source

The HARPS search for southern extra-solar planets [PDF]

Astronomy & Astrophysics, 2018
We report the discovery of four super-Earth planets around HD 215152, with orbital periods of 5.76, 7.28, 10.86, and 25.2 d, and minimum masses of 1.8, 1.7, 2.8, and 2.9 M⊕ respectively.
J. Delisle, D. Ségransan, X. Dumusque, R. F. Díaz, F. Bouchy, C. Lovis, F. Pepe, S. Udry, R. Alonso, W. Benz, A. Coffinet, A. Cameron, M. Deleuil, P. Figueira, M. Gillon, G. Curto, M. Mayor, C. Mordasini, F. Motalebi, C. Moutou, D. Pollacco, E. Pompei, D. Queloz, N. Santos, A. Wyttenbach   +24 more
semanticscholar   +1 more source

MODULES FOR EXPERIMENTS IN STELLAR ASTROPHYSICS (MESA): PLANETS, OSCILLATIONS, ROTATION, AND MASSIVE STARS [PDF]

, 2013
We substantially update the capabilities of the open source software package Modules for Experiments in Stellar Astrophysics (MESA), and its one-dimensional stellar evolution module, MESAstar.
B. Paxton, M. Cantiello, P. Arras, L. Bildsten, E. Brown, A. Dotter, C. Mankovich, M. Montgomery, D. Stello, F. Timmes, R. Townsend   +10 more
semanticscholar   +1 more source