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

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

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999esasp.427..145a&link_type=abstract

The Universe as Seen by ISO. Eds. P. Cox & M. F. Kessler. ESA-SP 427., p. 145

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7

Stars: Circumstellar Matter, Stars: Individual: &Beta, Uma

Scientific paper

We observed the mid- and far-infrared spectral energy distributions of 9 A-type stars 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 derived upper limits for the dust mass around the other stars in the range of 0.02-0.40 Mmoon. Since 5 stars are confirmed members of the 300 Myrs old Ursae Majoris group, our results help to determine the temporal evolution from the massive disks/envelopes of Herbig Ae/Be stars to Vega-type disks.

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