Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-23T19:46:47.740Z Has data issue: false hasContentIssue false
  • English
  • Français

An Infrared Study of Southern Be Stars: Ground-Based and Iras Observations

Published online by Cambridge University Press:  23 September 2016

P. Persi  and
M. Ferrari-Toniolo
P. Persi
Affiliation:
Istituto Astrofisica Spaziale, CNR, CP. 67, 00044 Frascati, Italy
M. Ferrari-Toniolo
Affiliation:
Istituto Astrofisica Spaziale, CNR, CP. 67, 00044 Frascati, 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.

Infrared observations represent a powerful tool in understanding the physical conditions of the circumstellar matter around Be stars. Previous IR studies have been reported by different authors (i.e. Gehrz et al. 1974, Persi et al. 1982, Ashok et al. 1984, and Waters, 1986).

For this purpose, we have undertaken an IR study of 21 southern Be stars including JHKLM photometry, CVF spectra at resolution R=100 around the IR HI emission lines Brγ, Brα, and Pfγ and IRAS data at 12 and 25 microns taken from the Point Sources Catalogue. The IRAS flux densities were corrected following the procedure described in the IRAS Explanatory Supplement.

The near-IR observations were obtained in March 1985 at the lm ESO (La Silla, Chile) telescope, equipped with the InSb Spectrophotometer. In the next section we discuss the nature of the observed IR excesses, and from the measured Brα/Brγ intensity line ratios for three Be stars, we derive the mass-loss rates.

Type
III. The Circumstellar Gas
Information
International Astronomical Union Colloquium , Volume 92: Physics of Be Stars , August 1987 , pp. 242 - 244
Copyright
Copyright © Cambridge University Press 1987

References

Ashok, N. M. et al. (1984), Mon. Not. R. Astr. Soc., 211, 471.CrossRefGoogle Scholar
Gehrz, et al. (1974), Astrophys. J., 191, 675.CrossRefGoogle Scholar
Giovannelli, F. et al. (1986), these proceedings.Google Scholar
Kurucz, R. L. (1979), Astrophys. J. Suppl., 40, 1.Google Scholar
Persi, et al. (1982), IAU Symp. No. 98, “Be Stars”, p. 247, (Reidel Publ. Co.).CrossRefGoogle Scholar
Persson, S. E., McGregor, P. J. (1985), Astron.|J., 90, 169.Google Scholar
Simon, M. (1983), Astron. J., 266, 623.CrossRefGoogle Scholar
Waters, L. B. F. M. (1986), Astron. Astrophys., 162, 121.Google Scholar