Hostname: page-component-77c89778f8-m8s7h Total loading time: 0 Render date: 2024-07-18T23:45:18.925Z Has data issue: false hasContentIssue false
  • English
  • Français

AG Carinae: Variability, extinction, distance and luminosity

Published online by Cambridge University Press:  12 April 2016

Henny J.G.L.M. Lamers ,
Nick Hoekzema ,
Norman R. Trams ,
Angelo Cassatella  and
Mike Barylak
Henny J.G.L.M. Lamers
Affiliation:
SRON Laboratory for Space Research, Utrecht, the Netherlands
Nick Hoekzema
Affiliation:
SRON Laboratory for Space Research, Utrecht, the Netherlands
Norman R. Trams
Affiliation:
SRON Laboratory for Space Research, Utrecht, the Netherlands
Angelo Cassatella
Affiliation:
ESA Satellite Tracking Station, Villafranca, Spain
Mike Barylak
Affiliation:
ESA Satellite Tracking Station, Villafranca, Spain

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.

AG Car is one of the few Luminous Blue Variables (LBV’s) in our galaxy. The star is a photometric variable which had a recent outburst in 1981 (Whitelock et al., 1983; Wolf and Stahl, 1982) and is surrounded by a resolved ring nebula (Thackeray, 1950; Paresce, 1989). These properties indicate that AG Car is a typical LBV. However, at its canonical distance of 2-2.5 kpc, derived from its assumed membership of the Car OBI or OB2 association, AG Car has a bolometric luminosity of Mbol ⋍ −8.5 to −9.0 and is located significantly below the Humphreys-Davidson limit, and also below the upperlimit for red supergiants (RSG). This implies that AG Car might have been a RSG and that the ring might be due to the interaction of the RSG wind and the LBV wind.

Type
Section II: Poster Papers, A Brief List of Catalogs, and Index
Information
International Astronomical Union Colloquium , Volume 113: Physics of Luminous Blue Variables , 1989 , pp. 271 - 272
Copyright
Copyright © Kluwer 1989

References

Hejlesen, P.M. 1980, Astr.Ap.Suppl. 39, 347.Google Scholar
Humphreys, R.M., Lamers, H.J.G.L.M., Hoekzema, N. 1989, Ap.J. (in press).Google Scholar
Kurucz, R.L. 1979, Ap.J.Suppl. 40, 1.Google Scholar
Maeder, A., Meynet, G. 1987, Astr.Ap. 182, 243.Google Scholar
Paresce, F. 1989, These proceedings.Google Scholar
Thackeray, A.D. 1950, M.N.R.A.S. 110, 524.Google Scholar
Whitelock, P.A. et al. 1983, M.N.R.A.S. 205, 577.Google Scholar
Wolf, B. 1989, These proceedings.Google Scholar
Wolf, B., Stahl, O. 1982, Astr.Ap. 112, 111.Google Scholar