2008A&A...477..309P


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.27CEST06:06:16

2008A&A...477..309P - Astronomy and Astrophysics, volume 477, 309-314 (2008/1-1)

Influence of the evolving stellar X-ray luminosity distribution on exoplanetary mass loss.

PENZ T., MICELA G. and LAMMER H.

Abstract (from CDS):

We investigate the influence of high-energy stellar radiation at close-in orbits on atmospheric mass loss during the stellar evolution of a G-type star. High-energy stellar luminosity varies over a wide range for G field stars. The X-ray luminosity distributions from the Pleiades, the Hyades, and the field are used to derive a scaling law for the evolution of the stellar X-ray luminosity distribution. A modified energy-limited escape approach is taken for calculating atmospheric mass loss for a broad range of planetary parameters. We show that the evolution of close-in exoplanets strongly depends on the detailed X-ray luminosity history of their host stars, which varies over several orders-of-magnitude for G stars. Stars located in the high-energy tail of the luminosity distribution can evaporate most of its planets within 0.5AU, while a significant fraction of planets can survive if exposed to a moderate X-ray luminosity. We show the change on an initial planetary mass distribution caused by atmospheric escape.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: activity - X-rays: stars - star: coronae

Status at CDS:  

Simbad objects: 5

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Number of rows : 5

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 Cl Melotte 22 OpC 03 47 00 +24 07.0           ~ 2966 0
2 Cl Melotte 25 OpC 04 26 54.00 +15 52 00.0           ~ 2643 0
3 Kepler-1b Pl 19 07 14.0379171930 +49 18 59.090895318           ~ 279 1
4 V* V376 Peg EP* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 990 1
5 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1452 1

    Equat.    Gal    SGal    Ecl

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2020.05.27-06:06:16

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