Other
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...181.6806h&link_type=abstract
American Astronomical Society, 181st AAS Meeting, #68.06; Bulletin of the American Astronomical Society, Vol. 24, p.1228
Other
Scientific paper
Using the 40'' Nickel telescope of the Lick Observatory, we have imaged 10 main sequence stars with a ccd and a coronagraph in a search for dust reflection nebulae indicating possible protoplanetary disks. The stars were chosen for their IRAS and submillimeter excesses, and their closeness to Earth. The stars observed were epsilon Eri, 49 Cet, HR 7474, HR 6629, Gl 673.1, SAO 91022, SAO 131926, SAO 111388, SAO 93601, and SAO 96709. Spectra of most of the stars, of types B - K, show that they are normal main sequence stars and not emission line or T Tauri stars. Observations were made with both I band and broadband green filters, where light pollution at Lick Observatory is minimal. Circular disks and wire coronagraphs of 5'' diameter were used, allowing angles of a few arcseconds to a few arcminutes from the stars to be examined. Preliminary results suggest that at least one star, HR 6629, is extended, but final confirmation and results for the other stars will be presented at the meeting.
Hawkins G. W.
Skinner Christopher J.
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