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The Galactic distribution of Wolf-Rayet stars: an optical and infrared approach

Published online by Cambridge University Press:  26 May 2016

Karel A. van der Hucht
Karel A. van der Hucht*
Affiliation:
SRON Nationaal Instituut voor Ruimte Onderzoek, Sorbonnelaan 2, NL-3584 CA Utrecht, Nederland

Abstract

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The recent VIIth Catalogue of Galactic Wolf-Rayet Stars (van der Hucht 2001), lists 227 Population I WR stars, comprising 127 WN, 87 WC, 10 WN/WC and 3 WO stars. Additional discoveries since then bring the census to ≳ 253 WR stars, including ≳ 27 WNL and 13 WCL stars within 50 pc of the Galactic Center. A re-determination of the optical photometric distances and the galactic distribution of WR stars shows in the solar neighbourhood (d < 3 kpc) a projected surface density of 2.7 WR stars per kpc2, a NWC/NWN number ratio of 1.3, and a WR binary frequency of 40%. Compared with other Local Group galaxies, the NWC/NWN number ratio in the solar neighborhood is a factor ~2 above the observed metallicity-dependent trend. This could imply that some 30 galactic WN stars in the d < 3 kpc volume are still hiding. Preliminary results of infrared photometric distance determinations are shown. The galactocentric distance (RWR) distribution per subtype shows RWN and RWC decreasing with later WN and WC subtypes. The observed trend is more indicative of WNE → WCE and WNL → WCL subtype evolution than of WNL → WNE and WCL → WCE subtype evolution.

Type
Part 3. Location and Distribution of Massive Stars
Information
Symposium - International Astronomical Union , Volume 212: A Massive Star Odyssey: From Main Sequence to Supernova , 2003 , pp. 441 - 450
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

Blum, R.D., Sellgren, K., DePoy, D.L. 1995, ApJ (Letters) 440, L17.Google Scholar
Chu, Y.-H. 2002, in: Moffat, A.F.J. & St-Louis, N. (eds.), Interacting Winds from Massive Stars, ASP-CS 260, 109.Google Scholar
Clark, J.S., Negueruela, I. 2002, A&A (Letters) 396, L25.Google Scholar
Conti, P.S., Garmany, C.D., de Loore, C., Vanbeveren, D. 1983, ApJ 274, 302.Google Scholar
Conti, P.S., Vacca, W.D. 1990, AJ 100, 431.CrossRefGoogle Scholar
Cotera, A.S., Simpson, J.P., Erickson, E.F., Colgan, S.W.J., Burton, M.G., Allen, D.A. 1999, ApJ 510, 747.Google Scholar
Crowther, P.A. 1999, in: van der Hucht, K.A., Koenigsberger, G. & Eenens, P.R.J. (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. No. 193 (San Francisco: ASP), p. 116.Google Scholar
Figer, D.F., McLean, I.S., Morris, M. 1995, ApJ (Letters) 447, L29.Google Scholar
Figer, D.F., Morris, M., McLean, I.S. 1996, in: Gredel, R. (ed.), The Galactic Center, ASP-CS 102, 263.Google Scholar
Figer, D.F., McLean, I.S., Morris, M. 1999a, ApJ 514, 202.Google Scholar
Figer, D.F., Morris, M., Geballe, T.R., Rich, R.M., Serabyn, E., McLean, I.S., Puetter, R.C., Yahil, A. 1999b, ApJ 525, 759.Google Scholar
Figer, D.F., Najarro, F., Gilmore, D., Morris, M., Kim, S.S., Serabyn, E., McLean, I.S., Gilbert, A.M., Graham, J.R., Larkin, J.E., Levenson, N.A., Teplitz, H.I. 2002, ApJ 581, 258.CrossRefGoogle Scholar
Genzel, R., Pichon, C., Eckart, A., Gerhard, O.E., Ott, T. 2000, MNRAS 317, 348.CrossRefGoogle Scholar
Georgelin, Y.M., Georgelin, Y.P. 1976, A&A 49, 57.Google Scholar
Hidayat, B., Supelli, K., van der Hucht, K.A. 1982, in: de Loore, C. & Willis, A.J. (eds.), Wolf-Rayet Stars: Observations, Physics, Evolution, Proc. IAU Symp. No. 99 (Dordrecht: Reidel), p. 27.Google Scholar
Homeier, N.L., Blum, R.D., Conti, P.S., Damineli, A. 2003, A&A 397, 585.Google Scholar
van der Hucht, K.A., Conti, P.S., Lundström, I., Stenholm, B. 1981, Space Sci. Reviews 28, 227 [VIth Catalogue].CrossRefGoogle Scholar
van der Hucht, K.A., Hidayat, B., Admiranto, A.G., Supelli, K.R., Doom, C. 1988, A&A 199, 217.Google Scholar
van der Hucht, K.A., Hidayat, B., (eds.) 1991, Wolf-Rayet Stars and Interrelations with Other Massive Stars in Galaxies, Proc. IAU Symp. No. 143 (Dordrecht: Kluwer)Google Scholar
van der Hucht, K.A. 1992, The A&A Review 4, 123.Google Scholar
van der Hucht, K.A., Williams, P.M., (eds.) 1995, Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution, Proc. IAU Symp. No. 163 (Dordrecht: Kluwer)Google Scholar
van der Hucht, K.A., Koenigsberger, G., Eenens, P.J.R., (eds.) 1999, Wolf-Rayet Phenomena in Massive Stars and Starbursts Galaxies, Proc. IAU Symp. No. 193 (San Francisco: ASP)Google Scholar
van der Hucht, K.A. 2001, New Astron. Reviews 45, 135 [VIIth Catalogue].CrossRefGoogle Scholar
van der Hucht, K.A., Williams, P.M., Setia Gunawan, D.Y.A. 2003, in preparation.Google Scholar
Kaper, L., Cherepashchuk, A. 2001, in: Kaper, L., van den Heuvel, E.P.J. & Woudt, P.A. (eds.), Black Holes in Binaries and Galactic Nuclei, Proc. ESO Astrophys. Symp. (Berlin: Springer), p. 277.Google Scholar
Krabbe, A., Genzel, R., Eckart, A., Najarro, F., Lutz, D., Cameron, M., Kroker, H., Tacconi-Garman, L.E., Thatte, N., Weitzel, L., Drapatz, S., Geballe, T., Sternberg, A., Kudritzki, R.-P. 1995, ApJ (Letters) 447, L95.Google Scholar
Langer, N., Woosley, S.E. 1996, in: Leitherer, C., Fritze-von Alvensleben, U. & Huchra, J. (eds.), From Stars to Galaxies. The Impact of Stellar Physics on Galaxy Evolution, ASP-CS 98, 220.Google Scholar
Langer, N., Heger, A. 1999, in: van der Hucht, K.A., Koenigsberger, G. & Eenens, P.R.J. (eds.), Wolf-Rayet Phenomena in Massive Stars and Starburst Galaxies, Proc. IAU Symp. No. 193 (San Francisco: ASP), p. 187.Google Scholar
Maeder, A. 1984, Adv. Space Res. 4, 55.Google Scholar
Maeder, A., Conti, P.S. 1994, Ann. Review Astron. Astrophys. 32, 227.Google Scholar
Maeder, A., Meynet, G. 1994, A&A 287, 803.Google Scholar
Massey, P., Johnson, O. 1998, ApJ 505, 793.Google Scholar
Massey, P., Waterhouse, E., DeGioia-Eastwood, K. 2000, AJ 119, 2214.CrossRefGoogle Scholar
Massey, P., DeGioia-Eastwood, K., Waterhouse, E. 2001, AJ 121, 1050.Google Scholar
McNamara, D.H., Madsen, J.B., Barnes, J., Ericksen, B.F. 2000, PASP 112, 202.Google Scholar
Moffat, A.F.J. 1995, in: van der Hucht, K.A. & Williams, P.M. (eds.), Wolf-Rayet Stars: Binaries, Colliding Winds, Evolution, Proc. IAU Symp. No. 163 (Dordrecht: Kluwer), p. 213.Google Scholar
Moneti, A., Glass, I.S., Moorwood, A.F.M. 1992, MNRAS 258, 705.CrossRefGoogle Scholar
Moneti, A., Glass, I.S., Moorwood, A.F.M. 1994, MNRAS 268, 194.Google Scholar
Moneti, A., Stolovy, S., Blommaert, J.A.D.L., Figer, D.F., Najarro, F. 2001, A&A 366, 106.Google Scholar
Pasquali, A., Comerón, F., Gredel, R., Torra, J., Figueras, F. 2002, A&A 396, 533.Google Scholar
Paumard, T., Maillard, J.P., Morris, M., Rigaut, F. 2001, A&A 366, 466.Google Scholar
Prantzos, N., Cassé, M. 1986, ApJ 307, 324.Google Scholar
Reed, B.C. 2000, AJ 120, 314.CrossRefGoogle Scholar
Reid, P. 1993, Ann. Review Astron. Astrophys. 31, 345.Google Scholar
Roberts, M.S. 1962, AJ 67, 79.CrossRefGoogle Scholar
Russeil, D. 1998, Étude Multispectrale des Régions d'Hydrogène Ionisé dans Notre Galaxie, .Google Scholar
Russeil, D. 2003, A&A 397, 133.Google Scholar
Sanders, D.B., Solomon, P.M., Scoville, N.Z. 1984, ApJ 276, 182.Google Scholar
Smith, L.F. 1968a, MNRAS 138, 109.Google Scholar
Smith, L.F. 1968b, MNRAS 141, 317.Google Scholar
Vreux, J.-M., Detal, A., Fraipont-Caro, D., Gosset, E., Rauw, G., (eds.) 1996, Wolf-Rayet Stars in the Framework of Stellar Evolution, Proc. 33 rd Liège Int. Astroph. Coll. (Liège: Univ. of Liège)Google Scholar