SIMBAD references

2000ApJ...534L..97B - Astrophys. J., 534, L97-L100 (2000/May-1)

On the radii of close-in giant planets.

BURROWS A., GUILLOT T., HUBBARD W.B., MARLEY M.S., SAUMON D., LUNINE J.I. and SUDARSKY D.

Abstract (from CDS):

The recent discovery that the close-in extrasolar giant planet HD 209458b transits its star has provided a first-of-its-kind measurement of the planet's radius and mass. In addition, there is a provocative detection of the light reflected off of the giant planet τ Bootis b. Including the effects of stellar irradiation, we estimate the general behavior of radius/age trajectories for such planets and interpret the large measured radii of HD 209458b and τ Boo b in that context. We find that HD 209458b must be a hydrogen-rich gas giant. Furthermore, the large radius of a close-in gas giant is not due to the thermal expansion of its atmosphere but to the high residual entropy that remains throughout its bulk by dint of its early proximity to a luminous primary. The large stellar flux does not inflate the planet but retards its otherwise inexorable contraction from a more extended configuration at birth. This implies either that such a planet was formed near its current orbital distance or that it migrated in from larger distances (≥0.5 AU), no later than a few times 107 yr of birth.

Abstract Copyright:

Journal keyword(s): Stars: Planetary Systems - Planets and Satellites: General - Stars: Individual: Henry Draper Number: HD 209458 - Stars: Individual: Constellation Name: τ Bootis

Simbad objects: 15

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2000ApJ...534L..97B and select 'bookmark this link' or equivalent in the popup menu


2019.09.21-07:37:17

© Université de Strasbourg/CNRS

    • Contact