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The Destruction Of Inner Planetary Systems During High-Eccentricity Migration Of Gas Giants

Mustill, Alexander LU ; Davies, Melvyn B LU and Johansen, Anders LU (2015) In Astrophysical Journal 808(1).
Abstract
mass close-in planets, despite the latter being exceedingly common. Two migration channels for hot Jupiters have been proposed: through a protoplanetary gas disk or by tidal circularization of highly eccentric planets. We show that highly eccentric giant planets that will become hot Jupiters clear out any low-mass inner planets in the system, explaining the observed lack of such companions to hot Jupiters. A less common outcome of the interaction is that the giant planet is ejected by the inner planets. Furthermore, the interaction can implant giant planets on moderately high eccentricities at semimajor axes <1 AU, a region otherwise hard to populate. Our work supports the hypothesis that most hot Jupiters reached their current orbits... (More)
mass close-in planets, despite the latter being exceedingly common. Two migration channels for hot Jupiters have been proposed: through a protoplanetary gas disk or by tidal circularization of highly eccentric planets. We show that highly eccentric giant planets that will become hot Jupiters clear out any low-mass inner planets in the system, explaining the observed lack of such companions to hot Jupiters. A less common outcome of the interaction is that the giant planet is ejected by the inner planets. Furthermore, the interaction can implant giant planets on moderately high eccentricities at semimajor axes <1 AU, a region otherwise hard to populate. Our work supports the hypothesis that most hot Jupiters reached their current orbits following a phase of high eccentricity, possibly excited by other planetary or stellar companions. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
stars:, planets and satellites: dynamical evolution and stability, individual (Kepler-18, Kepler-23, Kepler-58, Kepler-339)
in
Astrophysical Journal
volume
808
issue
1
publisher
University of Chicago Press
external identifiers
  • wos:000359062500014
  • scopus:84937843181
ISSN
0004-637X
DOI
10.1088/0004-637X/808/1/14
language
English
LU publication?
yes
id
82709a99-e2bc-40d0-a262-53d4893404b5 (old id 7984929)
date added to LUP
2015-09-24 14:55:25
date last changed
2017-08-13 04:01:22
@article{82709a99-e2bc-40d0-a262-53d4893404b5,
  abstract     = {mass close-in planets, despite the latter being exceedingly common. Two migration channels for hot Jupiters have been proposed: through a protoplanetary gas disk or by tidal circularization of highly eccentric planets. We show that highly eccentric giant planets that will become hot Jupiters clear out any low-mass inner planets in the system, explaining the observed lack of such companions to hot Jupiters. A less common outcome of the interaction is that the giant planet is ejected by the inner planets. Furthermore, the interaction can implant giant planets on moderately high eccentricities at semimajor axes &lt;1 AU, a region otherwise hard to populate. Our work supports the hypothesis that most hot Jupiters reached their current orbits following a phase of high eccentricity, possibly excited by other planetary or stellar companions.},
  articleno    = {14},
  author       = {Mustill, Alexander and Davies, Melvyn B and Johansen, Anders},
  issn         = {0004-637X},
  keyword      = {stars:,planets and satellites: dynamical evolution and stability,individual (Kepler-18,Kepler-23,Kepler-58,Kepler-339)},
  language     = {eng},
  number       = {1},
  publisher    = {University of Chicago Press},
  series       = {Astrophysical Journal},
  title        = {The Destruction Of Inner Planetary Systems During High-Eccentricity Migration Of Gas Giants},
  url          = {http://dx.doi.org/10.1088/0004-637X/808/1/14},
  volume       = {808},
  year         = {2015},
}