Exo-Planetary Transits of Limb Brightened Lines; Tentative Si IV Absorption by HD209458b

Details Exo-Planetary Transits of Limb Brightened Lines; Tentative Si IV Absorption by HD209458b Exo-Planetary Transits of Limb Brightened Lines; Tentative Si IV Absorption by HD209458b

2010-08-05

arxiv.org/abs/1008.1073v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

5 pages, 5 figures, Astrophysical Journal Letters, accepted

Scientific paper

Transit light curves for stellar continua have only one minimum and a "U" shape. By contrast, transit curves for optically thin chromospheric emission lines can have a "W" shape because of stellar limb-brightening. We calculate light curves for an optically thin shell of emission and fit these models to time-resolved observations of Si IV absorption by the planet HD209458b. We find that the best fit Si IV absorption model has R_p,SIV/R_*= 0.34+0.07-0.12, similar to the Roche lobe of the planet. While the large radius is only at the limit of statistical significance, we develop formulae applicable to transits of all optically thin chromospheric emission lines.

Affiliated with

Also associated with

No associations

Rating

Exo-Planetary Transits of Limb Brightened Lines; Tentative Si IV Absorption by HD209458b does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Exo-Planetary Transits of Limb Brightened Lines; Tentative Si IV Absorption by HD209458b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exo-Planetary Transits of Limb Brightened Lines; Tentative Si IV Absorption by HD209458b will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-230026