Far infrared submillimeter wave space telescope (FIRST) observations of stars with large mass loss rates

Details Far infrared submillimeter wave space telescope (FIRST) observations of stars with large mass loss rates Far infrared submillimeter wave space telescope (FIRST) observations of stars with large mass loss rates

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.260..135h&link_type=abstract

In its Proceedings of an ESA Workshop on a Spaceborne Submillimeter Astronomy Mission. A Cornerstone of the ESA Long Term Scienc

Astronomy and Astrophysics

Astronomy

1

Astronomical Satellites, Esa Satellites, Far Infrared Radiation, Infrared Astronomy, Infrared Telescopes, Spaceborne Astronomy, Spaceborne Telescopes, Stellar Mass Ejection, Submillimeter Waves, Asymptotic Giant Branch Stars, Emissivity, Stellar Envelopes, Stellar Radiation

Scientific paper

Continuum observations by FIRST of stars in the far infrared and submillimeter region to determine dust properties and mass loss rates are discussed. The possibilities of FIRST to observe stars which lose mass at a high rate are limited to galactic distances, and to asymptotic giant branch stars in the thermal pulse phase mainly. The large collecting area is essential for the sensitivity, but of no great use when it comes to mapping the circumstellar shells. Continuum observations of the thermal dust emission will, even when only a coherent detector system is available, yield a large enough sample of oxygen-rich as well as carbon-rich stars to determine the emissivity and the average size of the particles. Observations of molecular line emission will give mass loss rates and temperatures in the optically thick case, and column densities and relative abundances in the optically thin case. Both types of observations give the stellar velocity and the expansion velocity of the envelope.

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