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The origin of the eccentricity of the hot Jupiter in CI Tau

Rosotti, G.~P.; Booth, J. R. A.; Clarke, C.J.; Teyssandier, J.; Facchini, S. and Mustill, A.~J. LU (2017) In Monthly Notices of the Royal Astronomical Society 464. p.114-118
Abstract
Following the recent discovery of the first radial velocity planet in a star still possessing a protoplanetary disc (CI Tau), we examine the origin of the planet's eccentricity (e ~0.3). We show through long time-scale (10^5 orbits) simulations that the planetary eccentricity can be pumped by the disc, even when its local surface density is well below the threshold previously derived from short time-scale integrations. We show that the disc may be able to excite the planet's orbital eccentricity in <1 Myr for the system parameters of CI Tau. We also perform two-planet scattering experiments and show that alternatively the observed planet may plausibly have acquired its eccentricity through dynamical scattering of a migrating lower mass... (More)
Following the recent discovery of the first radial velocity planet in a star still possessing a protoplanetary disc (CI Tau), we examine the origin of the planet's eccentricity (e ~0.3). We show through long time-scale (10^5 orbits) simulations that the planetary eccentricity can be pumped by the disc, even when its local surface density is well below the threshold previously derived from short time-scale integrations. We show that the disc may be able to excite the planet's orbital eccentricity in <1 Myr for the system parameters of CI Tau. We also perform two-planet scattering experiments and show that alternatively the observed planet may plausibly have acquired its eccentricity through dynamical scattering of a migrating lower mass planet, which has either been ejected from the system or swallowed by the central star. In the latter case the present location and eccentricity of the observed planet can be recovered if it was previously stalled within the disc's magnetospheric cavity. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
accretion, accretion discs, planets and satellites: dynamical evolution and stability, planet-disc interactions, protoplanetary discs, stars: pre-main-sequence
in
Monthly Notices of the Royal Astronomical Society
volume
464
pages
114 - 118
publisher
Wiley-Blackwell
external identifiers
  • wos:000403097500024
ISSN
1365-2966
DOI
10.1093/mnrasl/slw184
language
English
LU publication?
yes
id
4562a030-e14d-41c4-a6db-958c4b1aea1b
date added to LUP
2017-02-14 12:12:11
date last changed
2017-09-18 11:38:42
@article{4562a030-e14d-41c4-a6db-958c4b1aea1b,
  abstract     = {Following the recent discovery of the first radial velocity planet in a star still possessing a protoplanetary disc (CI Tau), we examine the origin of the planet's eccentricity (e ~0.3). We show through long time-scale (10^5 orbits) simulations that the planetary eccentricity can be pumped by the disc, even when its local surface density is well below the threshold previously derived from short time-scale integrations. We show that the disc may be able to excite the planet's orbital eccentricity in &lt;1 Myr for the system parameters of CI Tau. We also perform two-planet scattering experiments and show that alternatively the observed planet may plausibly have acquired its eccentricity through dynamical scattering of a migrating lower mass planet, which has either been ejected from the system or swallowed by the central star. In the latter case the present location and eccentricity of the observed planet can be recovered if it was previously stalled within the disc's magnetospheric cavity. },
  author       = {Rosotti, G.~P. and Booth, J. R. A. and Clarke, C.J. and Teyssandier, J. and Facchini, S. and Mustill, A.~J.},
  issn         = {1365-2966},
  keyword      = {accretion,accretion discs,planets and satellites: dynamical evolution and stability,planet-disc interactions,protoplanetary discs,stars: pre-main-sequence},
  language     = {eng},
  month        = {01},
  pages        = {114--118},
  publisher    = {Wiley-Blackwell},
  series       = {Monthly Notices of the Royal Astronomical Society},
  title        = {The origin of the eccentricity of the hot Jupiter in CI Tau},
  url          = {http://dx.doi.org/10.1093/mnrasl/slw184},
  volume       = {464},
  year         = {2017},
}