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Terrestrial Planets...
Terrestrial Planets Across Space And Time
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- Zackrisson, Erik (författare)
- Uppsala University,Uppsala universitet,Observationell astrofysik
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- Calissendorff, Per (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi
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- Gonzalez, Juan (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi
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- Benson, Andrew (författare)
- Carnegie Observ, 813 Santa Barbara St, Pasadena, CA 91101 USA.,Carnegie Observatories
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- Johansen, Anders (författare)
- Lund University,Lunds universitet,Astronomi - Har omorganiserats,Institutionen för astronomi och teoretisk fysik - Har omorganiserats,Naturvetenskapliga fakulteten,Lund Observatory - Has been reorganised,Department of Astronomy and Theoretical Physics - Has been reorganised,Faculty of Science
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- Janson, Markus (författare)
- Stockholm University,Stockholms universitet,Institutionen för astronomi
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(creator_code:org_t)
- 2016-12-19
- 2016
- Engelska.
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Ingår i: ASTROPHYSICAL JOURNAL. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 833:2
- Relaterad länk:
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http://arxiv.org/pdf...
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http://dx.doi.org/10...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- The study of cosmology, galaxy formation, and exoplanets has now advanced to a stage where a cosmic inventory of terrestrial planets (TPs) may be attempted. By coupling semianalytic models of galaxy formation to a recipe that relates the occurrence of planets to the mass and metallicity of their host stars, we trace the population of TPs around both solar-mass (FGK type) and lower-mass (M dwarf) stars throughout all of cosmic history. We find that the mean age of TPs in the local universe is 7 +/- 1 Gyr for FGK hosts and 8 +/- 1 Gyr for M dwarfs. We estimate that hot Jupiters have depleted the population of TPs around FGK stars by no more than approximate to 10%, and that only approximate to 10% of the TPs at the current epoch are orbiting stars in a metallicity range for which such planets have yet to be confirmed. The typical TP in the local universe is located in a spheroid-dominated galaxy with a total stellar mass comparable to that of the Milky Way. When looking at the inventory of planets throughout the whole observable universe, we argue for a total of approximate to 1 x 10(19) and approximate to 5 x 10(20) TPs around FGK and M stars, respectively. Due to light travel time effects, the TPs on our past light cone exhibit a mean age of just 1.7 +/- 0.2 Gyr. These results are discussed in the context of cosmic habitability, the Copernican principle, and searches for extraterrestrial intelligence at cosmological distances.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- cosmology: miscellaneous
- extraterrestrial intelligence
- galaxies: formation
- planets and satellites
- terrestrial planets
- cosmology: miscellaneous
- extraterrestrial intelligence
- galaxies: formation
- planets and satellites: terrestrial planets
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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