2006A&A...456..373L


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.02CEST14:57:17

2006A&A...456..373L - Astronomy and Astrophysics, volume 456, 373-378 (2006/9-2)

Gravitational scattering by giant planets.

LAAKSO T., RANTALA J. and KAASALAINEN M.

Abstract (from CDS):

We seek to characterize giant-planet systems by their gravitational scattering properties. We do this to a given system by integrating it numerically along with a large number of hypothetical small bodies that are initially in eccentric habitable zone (HZ)-crossing orbits. Our analysis produces a single number, the escape rate, which represents the rate at which the small-body flux is perturbed away by the giant planets into orbits that no longer pose a threat to terrestrial planets inside the HZ. Obtaining the escape rate this way is similar to computing the largest Liapunov exponent as the exponential rate of divergence of two nearby orbits. For a terrestrial planet inside the HZ, the escape rate value quantifies the ``protective'' effect that the studied giant-planet system offers. Therefore, escape rates could provide information on whether certain giant-planet configurations produce a more desirable environment for life than the others. We present some computed escape rates on selected planetary systems, focusing on effects of varying the masses and semi-major axes of the giant planets. In the case of our Solar System we find rather surprisingly that Jupiter, in its current orbit, may provide a minimal amount of protection to the Earth.

Abstract Copyright:

Journal keyword(s): stars: planetary systems - solar system: general - celestial mechanics - methods: numerical - astrobiology

Simbad objects: 8

goto Full paper

goto View the reference in ADS

Number of rows : 8

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 4208 PM* 00 44 26.6507460377 -26 30 56.458181843   8.46 7.79     G7VFe-1CH-0.5 162 1
2 * tau Cet PM* 01 44 04.0834226 -15 56 14.926552 4.43 4.22 3.50 2.88 2.41 G8V 1091 1
3 HD 72659 PM* 08 34 03.1900792374 -01 34 05.579345170   8.08 7.47     G2V 128 1
4 * 47 UMa b Pl 10 59 27.9738644892 +40 25 48.922388918           ~ 145 1
5 * 47 UMa c Pl 10 59 27.9738644892 +40 25 48.922388918           ~ 88 1
6 * 47 UMa PM* 10 59 27.9738644892 +40 25 48.922388918   5.66   4.7   G1-VFe-0.5 712 1
7 HD 190360b Pl 20 03 37.4049065078 +29 53 48.495330996           ~ 47 1
8 HD 190360 PM* 20 03 37.4049065078 +29 53 48.495330996   6.44   5.2   G7IV-V 386 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2006A&A...456..373L and select 'bookmark this link' or equivalent in the popup menu


2020.07.02-14:57:17

© Université de Strasbourg/CNRS

    • Contact