Hostname: page-component-77c89778f8-9q27g Total loading time: 0 Render date: 2024-07-24T04:31:41.488Z Has data issue: false hasContentIssue false
  • English
  • Français

Residual extinction effects in spectra of newly formed stars

Published online by Cambridge University Press:  23 September 2016

Jacek Krelowski ,
Jacek Papaj  and
Walter Wegner
Jacek Krelowski
Affiliation:
1 Institute of Astronomy, N. Copernicus University ul. Chopina 12/18, Pl-87-100 Torun, Poland
Jacek Papaj
Affiliation:
1 Institute of Astronomy, N. Copernicus University ul. Chopina 12/18, Pl-87-100 Torun, Poland
Walter Wegner
Affiliation:
2 Institute of Mathematics, Pedagogical University, ul. Chodkiewicza 30, Pl-85-064 Bydgoszcz, Poland

Abstract

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.

Extinction laws observed in spectra of Be stars are shown to be evidently different from the mean extinction curve. They do not contain in many cases the prominent extinction feature - the 2200A bump. The results are derived both from multicolour (ranging from the far-IR until the ultraviolet ANS) photometry and from TD-1 UV spectra. It is strongly suggested that the observed extinction phenomena are originated in circumstellar, disk-shaped shells as the shape of resultant extinction curve suggests both the presence of big, core-mantle grains and continuous infrared emission of circumstellar origin.

Type
III Flare Stars and Related Objects Fuors and Other Non-Stable Objects
Information
Symposium - International Astronomical Union , Volume 137: Flare Stars in Star Clusters, Association and Solar Vicinity , 1990 , pp. 293 - 297
Copyright
Copyright © Kluwer 1990 

References

Gezari, D.Y., Schmitz, M., and Mead, J.M. 1984, Catalog of Infrared Observations , NASA Ref. Publ. 1118.Google Scholar
Greenberg, J.M. 1984, in Laboratory & Observational Infrared Spectra of Interstellar Dust , eds. Wolstencroft, R.D. and Greenberg, J.M., (Edinburgh: Royal Observatory Edinburgh), p. 1.Google Scholar
van de Hulst, H.C. 1986, in Light on dark matter , ed. Israel, F.P., (Dordrecht: Reidel), p. 161.CrossRefGoogle Scholar
Jamar, C., Macau-Hercot, D., Monfils, A., Thompson, G.I., Houziaux, L. and Wilson, R. 1976, Ultraviolet Bright Star Spectrophotometric Catalogue , ESA SR-27.Google Scholar
Krełowski, J., and Strobel, A. 1987, Astr. Ap. , 175, 186.Google Scholar
Macau-Hercot, D., Jamar, C., Monfils, A., Thompson, G.I., Houziaux, L. and Wilson, R. 1978, Supplement to the Ultraviolet Bright Star Spectrophotometric Catalogue , ESA SR-28.Google Scholar
Massa, D., Savage, B.D. 1989, in Interstellar Dust , eds. Allamandola, L. J. and Tielens, A.G.G.M., (Dordrecht: Kluwer), p. 3.CrossRefGoogle Scholar
Papaj, J., Wegner, W., and Krełowski, J. 1989, M. N. R. A. S. (submitted).Google Scholar
Savage, B.D. and Mathis, J.S. 1979, Ann. Rev. Astr. Ap. , 17, 73.CrossRefGoogle Scholar
Sitko, M.L., Savage, B.D., and Meade, M.R. 1981, Ap. J. , 246, 161.CrossRefGoogle Scholar
Wegner, W., and Krełowski, J. 1989, Astr. Nachr. , (in press).Google Scholar
Wesselius, P.R., van Duinen, R.J., de Jonge, A.R.W., Aalders, J.W.G., Luinge, W., and Wildeman, K. J. 1982, Astr. Ap. Suppl. , 49, 427.Google Scholar