IRAS observations of OH/IR stars - Determination of absolute luminosities and mass loss rates

Details IRAS observations of OH/IR stars - Determination of absolute luminosities and mass loss rates IRAS observations of OH/IR stars - Determination of absolute luminosities and mass loss rates

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...167..247h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 167, Oct. 1986, p. 247-259.

Astronomy and Astrophysics

Astronomy

86

Giant Stars, Infrared Astronomy Satellite, Infrared Stars, Stellar Luminosity, Stellar Mass Ejection, Variable Stars, Asymptotic Giant Branch Stars, Bolometers, Hydroxyl Emission, Main Sequence Stars, Masers, Stellar Envelopes

Scientific paper

Observations obtained with the Infrared Astronomical Satellite (IRAS) of a sample of well studied OH/IR stars, for which accurate distances are available, are presented and analyzed. A bolometric correction is determined as a function of the 12 micron to 25 micron flux ratio and bolometric magnitudes are derived. With help of the 'radio' periods time averaged luminosities could be determined. The luminosity function of stars on the asymptotic giant branch is constructed and compared with the expectation from the distribution of stars on the main-sequence and their lifetimes. The long wavelength emission is used to find the mass loss rates, the optical depth of the circumstellar dust shells, and the dust to gas ratio by mass. The results for this sample, selected on their radio properties, are applicable to a much larger set of IRAS sources for which data from other wavelength regimes are not available.

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