2015A&A...579A..37P

Query : 2015A&A...579A..37P

2015A&A...579A..37P - Astronomy and Astrophysics, volume 579A37-37 (2015/7-1)

Theoretical models of planetary system formation. II. Post-formation evolution.

PFYFFER S., ALIBERT Y., BENZ W. and SWOBODA D.

Abstract (from CDS):

We extend the results of planetary formation synthesis by computing the long-term evolution of synthetic systems from the clearing of the gas disk into the dynamical evolution phase.We use the symplectic integrator SyMBA to numerically integrate the orbits of planets for 100 Myr, using populations from previous studies as initial conditions.We show that within the populations studied, mass and semimajor axis distributions experience only minor changes from post-formation evolution. We also show that, depending upon their initial distribution, planetary eccentricities can statistically increase or decrease as a result of gravitational interactions. We find that planetary masses and orbital spacings provided by planet formation models do not result in eccentricity distributions comparable to observed exoplanet eccentricities, requiring other phenomena, such as stellar fly-bys, to account for observed eccentricities.

Abstract Copyright: ∼

Journal keyword(s): planets and satellites: dynamical evolution and stability - planets and satellites: formation

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 20782b Pl 03 20 03.5777546706 -28 51 14.660358176           ~ 76 1

Query : 2015A&A...579A..37P

Basic data :
HD 20782b -- Extra-solar Planet
Other object types: otypes_help 		Pl (), Pl? (2007ApJ), * (HD)
ICRS coord. (ep=J2000) : 		03 20 03.5777546706 -28 51 14.660358176 (Optical) [ 0.0071 0.0111 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		03 17 56.7069813531 -29 01 59.173910436 [ 0.0071 0.0111 90 ]
Gal coord. (ep=J2000) : 		224.8021218220598 -57.2785416657019 [ 0.0071 0.0111 90 ]
Proper motions mas/yr : 		349.054 -65.305 [0.011 0.013 90] A 2020yCat.1350....0G
Parallaxes (mas): 		27.8760 [0.0172] A 2020yCat.1350....0G
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HD 20782b

References (76 between 1850 and 2026) (Total 76)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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HD 20782b

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