Search for cool circumstellar matter in the Ursae Majoris group with ISO

Péter Ábrahám, Christoph Leinert, Alfons Burkert, Dietrich Lemke, Thomas Henning

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We observed the mid- and far-infrared spectral energy distributions of 9 A-type stars from the 300 Myrs old Ursae Majoris group using the ISO satellite and the UKIRT telescope. We found that only 1 out of the 9 stars shows clear signature of circumstellar dust, and we derived an upper limit of 0.05 Mmoon for the dust mass around the other stars. Our results suggest that the relatively high incidence of Vega-like disks observed among A-type field stars in the solar neighbourhood by IRAS cannot be extrapolated to the rest of the Milky Way. The Vega phenomenon appears to be the exception rather than the rule.

Original languageEnglish
Pages (from-to)91-96
Number of pages6
JournalAstronomy and Astrophysics
Volume338
Issue number1
Publication statusPublished - Oct 1 1998

Keywords

  • Circumstellar matter
  • Infrared: stars
  • Stars: individual: β uMA

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Ábrahám, P., Leinert, C., Burkert, A., Lemke, D., & Henning, T. (1998). Search for cool circumstellar matter in the Ursae Majoris group with ISO. Astronomy and Astrophysics, 338(1), 91-96.