2010A&A...517A..31S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.12CEST09:27:10

2010A&A...517A..31S - Astronomy and Astrophysics, volume 517, A31-31 (2010/7-1)

Formation of the resonant system HD 60532.

SANDOR Z. and KLEY W.

Abstract (from CDS):

Among multi-planet planetary systems there are a large fraction of resonant systems. Studying the dynamics and formation of these systems can provide valuable informations on processes taking place in protoplanetary disks where the planets are thought have been formed. The recently discovered resonant system HD 60532 is the only confirmed case, in which the central star hosts a pair of giant planets in 3:1 mean motion resonance. We intend to provide a physical scenario for the formation of HD 60532, which is consistent with the orbital solutions derived from the radial velocity measurements. Observations indicate that the system is in an antisymmetric configuration, while previous theroretical investigations indicate an asymmetric equilibrium state. The paper aims at answering this discrepancy as well. We performed two-dimensional hydrodynamical simulations of thin disks with an embedded pair of massive planets. Additionally, migration and resonant capture are studied by gravitational N-body simulations that apply properly parametrized non-conservative forces. Our simulations suggest that the capture into the 3:1 mean motion resonance takes place only for higher planetary masses, thus favouring orbital solutions having relatively smaller inclination (i=20°). The system formed by numerical simulations qualitatively show the same behaviour as HD 60532. We also find that the presence of an inner disk (between the inner planet and the star) plays a very important role in determining the final configurations of resonant planetary systems. Its damping effect on the inner planet's eccentricity is responsible for the observed antisymmetric state of HD 60532.

Abstract Copyright:

Journal keyword(s): planets and satellites: formation - celestial mechanics - hydrodynamics - methods: numerical

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 45364 PM* 06 25 38.4744251424 -31 28 51.428476346   8.82 8.06     G8V 98 1
2 HD 60532 PM* 07 34 03.1802404179 -22 17 45.838378187 5.02 4.94 4.39     F6IV-V 198 1
3 HD 73526 PM* 08 37 16.4834968915 -41 19 08.787335986   9.69 9.00     G6V 168 2
4 * rho01 Cnc d Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 134 1
5 * rho01 Cnc PM* 08 52 35.8113282132 +28 19 50.956901366 7.45 6.82   5.4   K0IV-V 969 1
6 * rho01 Cnc c Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 123 1
7 HD 128311 BY* 14 36 00.5607343227 +09 44 47.453643485 9.232 8.441 7.446 6.895 6.425 K3V 268 1
8 HD 202206 PM* 21 14 57.7684954746 -20 47 21.162361638   8.79 8.07     G6V 192 1
9 BD-15 6290 BY* 22 53 16.7323107416 -14 15 49.303409936 12.928 11.749 10.192 9.013 7.462 M3.5V 856 1

    Equat.    Gal    SGal    Ecl

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2020.07.12-09:27:10

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