ISO Spectral Energy Distributions for Vega-type Stars

Details ISO Spectral Energy Distributions for Vega-type Stars ISO Spectral Energy Distributions for Vega-type Stars

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.4713t&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #47.13; Bulletin of the American Astronomical Society, Vol. 29, p.1287

Astronomy and Astrophysics

Astronomy

Scientific paper

We present new infrared photometry of main-sequence stars in order to determine the frequency of mid- and far-infrared excesses in their spectral energy distributions. These observations constitute NASA Key Project VEGADISK (Stencel & Backman 1994, Ap&SS, 212, 417). We used the Infrared Space Observatory's (ISO) ISOPHOT instrument at wavelengths of 3.6, 11.5, 20, 60, and for some stars, 90 mu m, with a uniform 52 arcsec aperture. Final calibration of ISOPHOT data is not available from the ISO Project, so we have compared the fluxes obtained from ISO, IRAS, and ground-based observations to standardize our preliminary flux values. On this basis, nearly 25% of our stars show infrared excesses in our sample. We will report on the correlation of these excesses with stellar age.

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