Hostname: page-component-848d4c4894-pftt2 Total loading time: 0 Render date: 2024-05-11T20:44:27.727Z Has data issue: false hasContentIssue false
  • English
  • Français

Mass loss rates of OB stars derived from infrared observations

Published online by Cambridge University Press:  12 April 2016

E.G. Tanzi ,
M. Tarenghi  and
N. Panagia
E.G. Tanzi
Affiliation:
Istituto di Fisica Cosmica, CNR, Milano, Italy
M. Tarenghi
Affiliation:
European Southern Observatory, München, Germany
N. Panagia
Affiliation:
Istituto di Radioastronomia, CNR, Bologna, Italy

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

In this paper we report briefly on a study of the mass loss of early type stars in the infrared. Up to now near infrared (1.25 - 4.8 μ ) broad band photometry of 70 southern OB stars of various luminosity class has been secured. Program stars have been selected, among those bright enough in the infrared to give a suitable photometric accuracy, in order to cover a wide range of spectral types (Fig. 1).

37 stars are found to exhibit emission in excess over a blackbody photospheric continuum, which is interpreted in terms of gas ejected in the form of an accelerated wind. By means of model calculations the corresponding mass loss rates are derived. The obtained values compare well with those determined indipendently by various Authors for stars in common. Our data show that mass loss rates increase with luminosity and are a decreasing function of surface gravity.

Type
Session I - Winds from Early Type Stars: Observations
Information
International Astronomical Union Colloquium , Volume 59: Effects of Mass Loss on Stellar Evolution , 1981 , pp. 51 - 56
Copyright
Copyright © Reidel 1981

References

Abbot, D.C., Bieing, J.H., Churchwell, E., and Cassinelli, J.P., 1980, Ap. J., 238, 196 Google Scholar
Barlow, M.J., and Cohen, M., 1977, Ap.J., 213, 737 Google Scholar
Conti, P.S., Leep, E.M., and Lorre, J.J., 1977, Ap.J., 214, 759 Google Scholar
Conti, P.S., and Garmany, C.D., 1980, Ap.J., 238, 190 Google Scholar
Gathier, R., Lamers, H.J.G.L.M., and Snow, T.P., 1980, preprintGoogle Scholar
Kreysa, E., 1980, Ph.D. Dissertation, MPI für Radioastronomie, Bonn Google Scholar
Schultz, G.V., and Wiemer, W., 1975, Astron. and Astrophys., 43, 133 Google Scholar
Sneden, C., Geherz, R.D., and Hackwell, J.A., 1978, Ap.J., 223, 168 Google Scholar
Wamsteker, W., 1980, Astron. and Astrophys., in press.Google Scholar