2020MNRAS.491.1998M


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.18CEST11:11:31

2020MNRAS.491.1998M - Mon. Not. R. Astron. Soc., 491, 1998-2009 (2020/January-2)

Diverse outcomes of planet formation and composition around low-mass stars and brown dwarfs.

MIGUEL Y., CRIDLAND A., ORMEL C.W., FORTNEY J.J. and IDA S.

Abstract (from CDS):

The detection of Earth-sized exoplanets around low-mass stars - in stars such as Proxima Centauri and TRAPPIST-1 - provide an exceptional chance to improve our understanding of the formation of planets around M stars and brown dwarfs. We explore the formation of such planets with a population synthesis code based on a planetesimal-driven model previously used to study the formation of the Jovian satellites. Because the discs have low mass and the stars are cool, the formation is an inefficient process that happens at short periods, generating compact planetary systems. Planets can be trapped in resonances and we follow the evolution of the planets after the gas has dissipated and they undergo orbit crossings and possible mergers. We find that formation of planets above Mars mass and in the planetesimal accretion scenario, is only possible around stars with masses M* >= 0.07Msun and discs of Mdisc >= 10-2 Msun. We find that planets above Earth-mass form around stars with masses larger than 0.15 Msun, while planets larger than 5 M⊕ do not form in our model, even not under the most optimal conditions (massive disc), showing that planets such as GJ 3512b form with another, more efficient mechanism. Our results show that the majority of planets form with a significant water fraction; that most of our synthetic planetary systems have 1, 2, or 3 planets, but those with 4, 5, 6, and 7 planets are also common, confirming that compact planetary systems with many planets should be a relatively common outcome of planet formation around small stars.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): planets and satellites: composition - planets and satellites: formation - planets and satellites: general

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME G 268-38b Pl 00 44 59.3314993038 -15 16 17.543124886           ~ 98 0
2 G 268-38 PM* 00 44 59.3314993038 -15 16 17.543124886     14.150 13.801   M4.5 88 0
3 NAME YZ Cet c Pl 01 12 30.6367741360 -16 59 56.361313690           ~ 11 0
4 V* YZ Cet Er* 01 12 30.6367741360 -16 59 56.361313690 15.315 13.885 12.074 10.696 8.938 M4.0Ve 212 0
5 NAME Teegarden's Star LM* 02 53 00.8913291021 +16 52 52.642086267   17.21   14.1   dM6 116 0
6 NAME LP 656-38c Pl 05 01 57.4261049715 -06 56 46.371875101           ~ 8 0
7 LP 656-38 PM* 05 01 57.4261049715 -06 56 46.371875101   13.92 12.196 11.791 9.175 M4.0Ve 98 0
8 GJ 3512 b Pl 08 41 20.1289475639 +59 29 50.444849212           ~ 6 0
9 NAME L 320-124b Pl 10 14 51.7783473599 -47 09 24.189733387           ~ 101 0
10 L 320-124 PM* 10 14 51.7783473599 -47 09 24.189733387       13.067   M4 77 0
11 Ross 128 Er* 11 47 44.3968668170 +00 48 16.404931305 14.223 12.905 11.153 9.859 8.184 dM4 353 0
12 NAME Proxima Centauri Er* 14 29 42.9451234609 -62 40 46.170818907 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1029 0
13 NAME Proxima Centauri b Pl 14 29 42.9451234609 -62 40 46.170818907           ~ 248 0
14 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 571 1
15 G 139-21 PM* 17 15 18.9337265994 +04 57 50.064695682       14.394   M4.5V 255 1
16 TRAPPIST-1e Pl 23 06 29.3684052886 -05 02 29.031690445           ~ 156 0
17 TRAPPIST-1 LM* 23 06 29.3684052886 -05 02 29.031690445     18.798 16.466 14.024 M7.5e 581 0
18 TRAPPIST-1d Pl 23 06 29.3684052886 -05 02 29.031690445           ~ 132 0

    Equat.    Gal    SGal    Ecl

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