Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997abos.conf..149b&link_type=abstract
Conference Paper, Astronomical and Biochemical Origins and the Search for Life in the Universe, IAU Colloquium 161, Publisher: B
Astronomy and Astrophysics
Astronomy
Main Sequence Stars, Comets, Stellar Spectra, Solar System Evolution, Interplanetary Dust, Infrared Astronomy Satellite, Silicates, Emission Spectra, Infrared Spectra, Interstellar Radiation, Interplanetary Space
Scientific paper
To assess the physical conditions in our early solar system, we have to study the disks around other stars. Beta Pic is a main sequence star surrounded by a large dust disk. Beta Pic's mid-IR spectrum bears a striking resemblance to the silicate emission seen in some cometary spectra. We have selected a sample of main-sequence stars with similar IRAS properties to those of Beta Pic and undertaken a systematic survey of their physical properties. We obtained mid-IR spectra covering the range 8 to 13 microns at a resolution of 200 in June 1995. We report on the wide variety of silicate emission features we see and compare them to the spectra reported for many different interstellar and in interplanetary sources. Even among our small sample of stars, we find examples of silicate emission features that bear a striking similarity to those seen in the spectra of some comets like P/Halley and P/Bradfield 1987. These spectra also resemble the laboratory spectra of interplanetary dust particles.
Butner Harold M.
Walker Helen J.
Witteborn Fred. C.
Wooden Diane H.
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