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Atmospheric Modelling of the Companion Star in GRO J1655-40

Published online by Cambridge University Press:  05 March 2013

Michelle Buxton  and
Stephane Vennes
Michelle Buxton
Affiliation:
Research School of Astronomy & Astrophysics, Australian National University, Mount Stromlo Observatory, Cotter Road, Weston, ACT 2602, Australia; [email protected]
Stephane Vennes
Affiliation:
Department of Mathematics, Australian National University, John Dedman Building, Canberra, ACT 0200, Australia; [email protected]
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Abstract

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We have measured the rotational velocity of the companion star to be Ʊrot sin i= 80 ± 10 km s ˗1 (1σ) by fitting Kurucz model spectra to our observed spectrum of the black-hole candidate GRO J1655–40. From this we have calculated q = 0·31 ± 0·08, the mass of the compact object to be M1 = 7·91 ± 3·79 Mô (1σ) and for the companion starM2 = 2·76 ± 1·79 Mô (1σ), which is consistent with previous studies. We have also determined Teff = 6500 ± 50 K and [Fe/H] = −0·15 +0·15-0·10.

Keywords

binaries: spectroscopicstars:individual (GRO J1655–40)stars: rotation
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 18 , Issue 1 , 2001 , pp. 91 - 97
Copyright
Copyright © Astronomical Society of Australia 2001

References

Allen, C. W. 1963, in Astrophysical Quantities, 2nd edn (London: The Athlone Press, University of London), p. 162 Google Scholar
Andersen, J., Clausen, J. V., & Nordström, B. 1984, A&A, 137, 281 Google Scholar
Bailyn, C. D., et al. 1995a, Nature, 374, 701 CrossRefGoogle Scholar
Bailyn, C. D., Orosz, J. A., McClintock, J. E., & Remillard, R. A. 1995b, Nature, 378, 157 CrossRefGoogle Scholar
Balachandran, S. 1990, ApJ, 354, 310 Google Scholar
Boesgaard, A. M., & Tripicco, M. J. 1986, ApJ, 303, 724 Google Scholar
Eggleton, P. P. 1983, ApJ, 268, 368 Google Scholar
Friedman, J. L., Ipser, J. R., & Parker, L. 1986, ApJ, 304, 115 CrossRefGoogle Scholar
Harmon, B. A., et al. 1995, Nature, 374, 703 Google Scholar
Hjellming, R. M., & Rupen, M. P. 1995, Nature, 375, 464 CrossRefGoogle Scholar
Hjellming, R. M., et al. 1998, AAS 193, #103. 08Google Scholar
Hjellming, R. M., et al. 1999, AAS 195, #134. 03Google Scholar
Hoffleit, D. 1982, in The Bright Star Catalogue, 4th revised edn (New Haven: Yale University Observatory)Google Scholar
Hynes, R. I., O'Brien, K., Horne, K., Chen, W., & Haswell, C. A. 1998a, MNRAS, 299, L37 Google Scholar
Hynes, R. I., et al. 1998b, MNRAS, 300, 64 Google Scholar
Israelian, G., Rebolo, R., Basri, G., Casares, J., & Martin, E. L. 1999, Nature, 401, 142 Google Scholar
Kroeger, R. A., et al. 1996, A&AS, 120, 117 Google Scholar
Mirabel, I. F., Rodriguez, L. F., Cordier, B., Paul, J., & Lebrun, F. 1992, Nature, 358, 215 Google Scholar
Mirabel, I. F., & Rodriguez, L. F. 1994, Nature, 371, 46 CrossRefGoogle Scholar
Orosz, J. A., & Bailyn, C. D. 1997, ApJ, 477, 876 Google Scholar
Paczynski, B. 1971, ARA&A, 9, 183 Google Scholar
Phillips, S. N., Shahbaz, T., & Podsiadlowski, Ph. 1999, MNRAS, 304, 839 CrossRefGoogle Scholar
Rodriguez, L. F., Mirabel, I. F., & Marti, J. 1992, ApJ, 401, L15 Google Scholar
Shahbaz, T., van der Hooft, F., Casares, J., Charles, P. A., & van Paradijs, J. 1999, MNRAS, 306, 89 Google Scholar
Soria, R., Wickramasinghe, D. T., Hunstead, R. W., & Wu, K. 1998, ApJ, 495, L95 CrossRefGoogle Scholar
Tavani, M., et al. 1996, ApJ, 473, L103 CrossRefGoogle Scholar
van der Hooft, F., et al. 1997, MNRAS, 286, L43 Google Scholar
van der Hooft, F. F., Heemskerk, M. H. M., Alberts, F., & van Paradijs, J. 1998, A&A, 329, 538 Google Scholar
Wöhl, H., & Schmidt, W. 2000, A&A, 357, 763 Google Scholar
Zhang, S. N., et al. 1994, IAUC Circ., 6046 Google Scholar