Measuring Be depletion in cool stars with exoplanets

Details Measuring Be depletion in cool stars with exoplanets Measuring Be depletion in cool stars with exoplanets

2010-12-20

arxiv.org/abs/1012.4281v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

11 pages, 4 figures, accepted for publication in ApJ

Scientific paper

We present new UVES spectra of a sample of 14 mostly cool unevolved stars with planetary companions with the aim of studying possible differences in Be abundance with respect to stars without detected planets. We determine Be abundances for these stars that show an increase in Be depletion as we move to lower temperatures. We carry out a differential analysis of spectra of analog stars with and without planets to establish a possible difference in Be content. While for hot stars no measurable difference is found in Be, for the only cool (Teff ~ 5000 K) planet host star with several analogs in the sample we find enhanced Be depletion by 0.25 dex. This is a first indication that the extra-depletion of Li in solar-type stars with planets may also happen for Be, but shifted towards lower temperatures (Teff < 5500 K) due to the depth of the convective envelopes. The processes that take place in the formation of planetary systems may affect the mixing of material inside their host stars and hence the abundances of light elements.

Affiliated with

Also associated with

No associations

Rating

Measuring Be depletion in cool stars with exoplanets 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 Measuring Be depletion in cool stars with exoplanets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measuring Be depletion in cool stars with exoplanets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-453110