Hostname: page-component-78c5997874-lj6df Total loading time: 0 Render date: 2024-11-19T10:39:08.502Z Has data issue: false hasContentIssue false
  • English
  • Français

The Variable Shell Star HR 5999

Published online by Cambridge University Press:  12 April 2016

P.S. Thé  and
H.R.E. Tjin A Djie
P.S. Thé
Affiliation:
Astronomical Institute, University of Amsterdam, Roetersstraat 15, 1018 WB Amsterdam, The Netherlands
H.R.E. Tjin A Djie
Affiliation:
Astronomical Institute, University of Amsterdam, Roetersstraat 15, 1018 WB Amsterdam, The Netherlands

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.

From spectroscopic observations Bessell and Eggen (1972) (hereafter called BE) have detected that HR 5999 (erroneously named HR 6000 by BE) is a shell star of spectral type A7 III-IV with hydrogen lines in emission. Photometric observations show subsequently that HR 5999 varies in brightness up to about 1 mag semiregularly with a period of about 1 month. Eggen (1975) believes that HR 5999 forms a pre-main sequence object.

With HR 6000, the star HR 5999 forms a visual double star system named Δ199; HR 5999 is the southern component. The angular separation is about 45”. BE show that these stars have a common proper motion, and are, therefore, believed to form a physical pair.

Type
Part I: Young Objects
Information
International Astronomical Union Colloquium , Volume 42: The Interaction of Variable Stars with their Environment , 1977 , pp. 137 - 143
Copyright
Copyright © Veröff. Der Remeis-Sterwarte 1977

References

Bessell, M.S., Eggen, O.J.: 1972, Astroph. J. 177, 209.CrossRefGoogle Scholar
Eggen, O.J.: 1975, Publ. Astron. Soc. Pacific 87, 37.Google Scholar
Larson, R.B.: 1972, Monthly Notices Roy. Astron. Soc. 157, 121.Google Scholar
Lub, J., Pel, J.W.: 1977, Astron. Astroph. 54, 137.Google Scholar
Rijf, R., Tinbergen, J., Walraven, Th.: 1969, Bull. Astron. Inst. Neth., 20, 279.Google Scholar
Thé, P.S.: 1962, Contrib. Bosscha Obs. No. 15.Google Scholar
Walraven, Th., Walraven, J.H.: 1960, Bull. Astron. Inst. Neth. 15, 67.Google Scholar