2019MNRAS.489.3896C


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.19CEST14:39:16

2019MNRAS.489.3896C - Mon. Not. R. Astron. Soc., 489, 3896-3904 (2019/November-1)

Dust accretion in binary systems: implications for planets and transition discs.

CHACHAN Y., BOOTH R.A., TRIAUD A.H.M.J. and CLARKE C.

Abstract (from CDS):

The presence of planets in binary systems poses interesting problems for planet formation theories, both in cases where planets must have formed in very compact discs around the individual stars and where they are located near the edge of the stable circumbinary region, where in situ formation is challenging. Dust dynamics is expected to play an important role in such systems, since dust trapping at the inner edge of circumbinary discs could aid in situ formation, but would simultaneously starve the circumstellar discs of the solid material needed to form planets. Here we investigate the dynamics of dust in binary systems using smoothed particle hydrodynamics. We find that all our simulations tend towards dust trapping in the circumbinary disc, but the time-scale on which trapping begins depends on binary mass ratio (q) and eccentricity as well as the angular momentum of the infalling material. For q >= 0.1, we find that dust can initially accrete on to the circumstellar discs, but as the circumbinary cavity grows in radius, dust eventually becomes trapped in the circumbinary disc. For q = 0.01, we find that increasing the binary eccentricity increases the time required for dust trapping to begin. However, even this longer time-scale is likely to be shorter than the planet formation time-scale in the inner disc and is insufficient to explain the observed pre-transitional discs. This indicates that increase in companion eccentricity alone is not enough to allow significant transfer of solids from the outer to the inner disc.

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

Journal keyword(s): accretion, accretion discs - hydrodynamics - planets and satellites: formation - protoplanetary discs - binaries: general

Simbad objects: 4

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Number of rows : 4

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 WASP-53 * 02 07 38.2093703588 -20 39 42.761678019   13.54 12.60 12.44 11.65 ~ 13 1
2 V* UX Tau A TT* 04 30 03.9931880444 +18 13 49.476948664   12.92 11.15     K2Ve 333 0
3 EM* LkCa 15 Or* 04 39 17.7912813350 +22 21 03.387667491   13.01 12.03 11.61   K5:Ve 581 1
4 WASP-81 * 20 16 49.8900228730 +03 17 38.454665939   13.09 12.47 12.37 11.70 ~ 10 0

    Equat.    Gal    SGal    Ecl

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2021.04.19-14:39:17

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