Debris disks around solar-type stars: Observations of the pleiades with the spitzer space telescope

J. M. Sierchio, G. H. Rieke, K. Y.L. Su, P. Plavchan, J. R. Stauffer, N. I. Gorlova

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We present Spitzer MIPS observations at 24μm of 37 solar-type stars in the Pleiades and combine them with previous observations to obtain a sample of 71 stars. We report that 23 stars, or 32% ± 6.8%, have excesses at 24μm at least 10% above their photospheric emission. We compare our results with studies of debris disks in other open clusters and with a study of A stars to show that debris disks around solar-type stars at 115Myr occur at nearly the same rate as around A-type stars. We analyze the effects of binarity and X-ray activity on the excess flux. Stars with warm excesses tend not to be in equal-mass binary systems, possibly due to clearing of planetesimals by binary companions in similar orbits. We find that the apparent anti-correlations in the incidence of excess and both the rate of stellar rotation and also the level of activity as judged by X-ray emission are statistically weak.

Original languageEnglish (US)
Pages (from-to)1421-1432
Number of pages12
JournalAstrophysical Journal
Volume712
Issue number2
DOIs
StatePublished - 2010

Keywords

  • Circumstellar matter
  • Infrared: stars
  • Open clusters and associations: individual (Pleiades)
  • Stars: solar-type
  • Stars: winds, outflows

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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