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Properties of hot massive stars from studies of their ring nebulae

Published online by Cambridge University Press:  07 August 2017

Linda J. Smith
Linda J. Smith*
Affiliation:
Department of Physics and Astronomy, University College London Gower Street, London WC1E 6BT, U.K.

Abstract

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Wolf-Rayet (WR) stars and their possible precursors, the Luminous Blue Variables (LBVs), are often surrounded by ring nebulae. It is believed that these nebulae are formed by the action of the stellar wind, matter being ejected from the star in the past, or a combination of these two processes. The various research applications of LBV and WR nebulae are reviewed with regard to the information they provide on the properties of the central stars. They are very useful probes of stellar evolution since the details of the previous evolutionary phases of the central stars are contained in the nebulae. In particular, abundance studies can provide insights into the chemical processes operating during the precursor phases. The nebulae can also be used as probes of the far-UV ionizing flux distribution of the central WR stars by comparing the observed levels of nebular ionization with those produced with non-LTE WR model flux distributions. Comparisons of stellar effective temperatures and luminosities derived using this technique with those determined by modelling stellar emission lines can identify deficiencies such as the lack of line-blanketing in WR model atmospheres. Very hot WR stars can also be identified by searching for nebular HeII emission. Studies of bipolar structures in LBV and WR nebulae provide valuable clues on wind asymmetries in the central stars.

Keywords

stars: Wolf-RayetLuminous Blue Variablesring nebulae
Type
Session I - Basic parameters, properties of single Wolf-Ray et stars
Information
Symposium - International Astronomical Union , Volume 163: Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution , 1995 , pp. 24 - 33
Copyright
Copyright © Kluwer 1995 

References

Barlow, M.J., Drew, J.E., Meaburn, J., Massey, R.M. 1994, MNRAS 268, L29 Google Scholar
Chiosi, C., Maeder, A. 1986, Ann. Rev. A&A 24, 329 Google Scholar
Chu, Y.-H. 1981, ApJ 249, 195 CrossRefGoogle Scholar
Chu, Y.-H. 1991, in: van der Hucht, K.A. & Hidayat, B. (eds.), Wolf-Rayet Stars and Interrelations with other Massive Stars in Galaxies, Proc. IAU Symp. No. 143 (Dordrecht: Kluwer), p. 349 Google Scholar
Chu, Y.-H., Treffers, R.R., Kwitter, K.B. 1983, ApJ Suppl. 53, 937 Google Scholar
Clampin, M., Nota, A., Golimowski, D.A., Leitherer, C., Durrance, S.T. 1993, ApJ (Letters) 410, L35 CrossRefGoogle Scholar
Crowther, P.A., Smith, L.J., Hillier, D.J. 1994, in: Vanbeveren, D., Van Rensbergen, W. & de Loore, C. (eds.), Evolution of Massive Stars: A Confrontation between Theory and Observations, Sp. Sci. Rev. 66, 271 Google Scholar
Davidson, K., Dufour, R.J., Walborn, N.R., Gull, T.R. 1986, ApJ 305, 867 Google Scholar
Dopita, M.A., Lozinskaya, T.A., McGregor, P.J., Rawlings, S.J. 1990, ApJ 351, 563 Google Scholar
Dopita, M.A., Bell, J.F., Chu, Y.-H., Lozinskaya, T.A. 1994, ApJ Suppl. in press Google Scholar
Drissen, L., Shara, M.M., Moffat, A.F.J. 1991, AJ 101, 1659 Google Scholar
Esteban, C., Vílchez, J.M. 1992, ApJ 390, 536 Google Scholar
Esteban, C., Vílchez, J.M., Manchado, A., Edmunds, M.G. 1990, A&A 227, 515 Google Scholar
Esteban, C., Vílchez, J.M., Smith, L.J., Manchado, A. 1991, A&A 244, 205 Google Scholar
Esteban, C., Vílchez, J.M., Smith, L.J., Clegg, R.E.S. 1992, A&A 259, 629 Google Scholar
Esteban, C., Smith, L.J., Vílchez, J.M., Clegg, R.E.S. 1993, A&A 272, 299 Google Scholar
Esteban, C., Vílchez, J.M., Smith, L.J. 1994, AJ 107, 1041 Google Scholar
Pacheco, de Freitas, Damineli Neto, A., Costa, R.D.D., Viotti, R. 1992, A&A 266, 360 Google Scholar
Garnett, D.R., Chu, Y.-H., Dopita, M.A. 1993, Rev. Mexicana Astron. Astrof. 27, 141 Google Scholar
Heckathorn, J.N., Bruhweiler, F.C., Gull, T.R. 1982, ApJ 252, 230 Google Scholar
Hester, J.J., Light, R.M., Westphal, J.A., Currie, D.G., Groth, E.J., Holtzman, J.A., Lauer, T.R., O'Neil, E.J. 1991, AJ 102, 654 Google Scholar
Hutsemékers, D. 1994, A&A (Letters) 281, L81 Google Scholar
Hutsemékers, D., Van Drom, E. 1991a, A&A 248, 141 Google Scholar
Hutsemékers, D., Van Drom, E. 1991b, A&A 251, 620 Google Scholar
Johnson, D.R.H., Barlow, M.J., Drew, J.E., Brinks, E. 1992, MNRAS 255, 261 Google Scholar
Kingsburgh, R.L., Barlow, M.J. 1994, A&A submitted Google Scholar
Maeder, A.F.J. 1989, in: Davidson, K., Moffat, A.F.J. & Lamers, H.J.G.L.M. (eds.), Physics of Luminous Blue Variables, Proc. IAU Coll. No. 113 (Dordrecht: Kluwer), p. 15 Google Scholar
Maeder, A. 1990, A&A Suppl. 84, 139 Google Scholar
Marston, A.P., Chu, Y.-H., Garcia-Segura, G. 1994a, ApJ Suppl. in press Google Scholar
Marston, A.P., Yocum, D.R., Garcia-Segura, G., Chu, Y.-H 1994b, ApJ Suppl. in press Google Scholar
Miller, G.J., Chu, Y.-H. 1993, ApJ Suppl. 85, 137 CrossRefGoogle Scholar
Mitra, P.M., Dufour, R.J. 1990, MNRAS 242, 98 Google Scholar
Niemela, V.S., Heathcote, S.R., Weller, W.G. 1991, in: van der Hucht, K.A. & Hidayat, B. (eds.), Wolf-Rayet Stars and Interrelations with other Massive Stars in Galaxies, Proc. IAU Symp. No. 143 (Dordrecht: Kluwer), p. 425.Google Scholar
Nota, A., Leitherer, C., Clampin, M., Greenfield, P., Golimowski, D.A. 1992, ApJ 398, 621 Google Scholar
Paresce, F., Nota, A. 1989, ApJ (Letters) 341, L83 Google Scholar
Pakull, M.W. 1991, in: van der Hucht, K.A. & Hidayat, B. (eds.), Wolf-Rayet Stars and Interrelations with other Massive Stars in Galaxies, Proc. IAU Symp. No. 143 (Dordrecht: Kluwer), p. 391.Google Scholar
Robberto, M., Ferrari, A., Nota, A., Paresce, F. 1993, A&A 269, 330 Google Scholar
Rosa, M.R. 1987, in: Appenzeller, I. & Jordan, C. (eds.), Circumstellar Matter, Proc. IAU Symp. No. 122 (Dordrecht: Kluwer), p. 457 Google Scholar
Rosa, M.R., Mathis, J.S. 1990, in: Garmany, C.D. (ed.), Properties of Hot Luminous Stars, ASP Conf. Series 7, 135 Google Scholar
Schmutz, W., Leitherer, C., Grünwald, R. 1992, PASP 104, 1164 Google Scholar
Schmutz, W., Vogel, M., Hamann, W.-R., Wessolowski, U. 1994, in preparation Google Scholar
Schulte-Ladbeck, R.E., Clayton, G.C., Meade, M.R. 1993a, in: Cassinelli, J.P. & Churchwell, E.B. (eds.), Massive Stars: Their Lives in the Interstellar Medium, ASP Conf. Series 35, 237 Google Scholar
Schulte-Ladbeck, R.E., Leitherer, C., Clayton, G.C., Robert, C., Meade, M.R. 1993b, ApJ 407, 723 Google Scholar
Smith, L. J., Esteban, C. 1994, in: Vanbeveren, D., Van Rensbergen, W. & de Loore, C. (eds.), Evolution of Massive Stars: A Confrontation between Theory and Observations, Sp. Sci. Rev. 66, 263 Google Scholar
Smith, L.J., Crowther, P.A., Prinja, R.K. 1994, A&A 281, 833 Google Scholar
Viotti, R., Polcaro, V.F., Rossi, C. 1993, A&A 276, 432 Google Scholar