[en] We present new XMM-Newton results on the field around the NGC 346 star cluster in the SMC. This continues and extends previously published work on Chandra observations of the same field. The two XMM-Newton observations were obtained, respectively, 6 months before and 6 months after the previously published Chandra data. Of the 51 X-ray sources detected with XMM-Newton, 29 were already detected with Chandra. Comparing the properties of these X-ray sources in each of our three data sets has enabled us to investigate their variability on timescales of a year. Changes in the flux levels and/or spectral properties were observed for 21 of these sources. In addition, we discovered long-term variations in the X-ray properties of the peculiar system HD 5980, a luminous blue variable star that is likely to be a colliding wind binary system, which displayed the largest luminosity during the first XMM-Newton observation.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Nazé, Yaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Groupe d'astrophysique des hautes énergies (GAPHE)
Manfroid, Jean ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Stevens, I. R.
Corcoran, M. F.
Flores, A.
Language :
English
Title :
An x-ray investigation of the NGC 346 field in the small Magellanic Cloud. III. XMM-Newton data
Publication date :
10 June 2004
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
Univ Chicago Press, Chicago, United States - Illinois
Arnaud, K. 1996, in ASP Conf. Ser. 101, Astronomical Data Analysis Software and Systems V, ed. G. H. Jacoby & J. Barnes (San Francisco: ASP), 17
Blackburn, J. K. 1995, in ASP Conf. Ser. 77, Astronomical Data Analysis Software and Systems IV, ed. R. A. Shaw, H. E. Payne, & J. J. E. Hayes (San Francisco: ASP), 367
Giacconi, R., et al. 2001, ApJ, 551, 624
Haberl, F. 2003, in COSPAR Symposium on High Energy Studies of Supernova Remnants and Neutron Stars, in press (astro-ph/0302540)
Haberl, F., Filipovic, M. D., Pietsch, W., & Kahabka, P. 2000, A&AS, 142, 41 [HFP2000]
Haberl, F., & Pietsch, W. 2004, A&A, 414, 667
Haberl, F., & Sasaki, M. 2000, A&A, 359, 573
Jansen, F., et al. 2001, A&A, 365, L1
Kaastra, J. S. 1992, An X-Ray Spectral Code for Optically Thin Plasmas (Internal SRON-Leiden Rep., updated ver. 2.0)
Kahabka, P., Pietsch, W., Filipovic, M. D., & Haberl, F. 1999, A&AS, 136, 81
Lamb, R. C., Fox, D. W., Macomb, D. J., & Prince, T. A. 2002, ApJ, 574, L29
Lejeune, T., & Schaerer, D. 2001, A&A, 366, 538
Macomb, D. J., Fox, D. W., Lamb, R. C., & Prince, T. A. 2003, ApJ, 584, L79
Majid, W. A., Lamb, R. C., & Macomb, D. J. 2004, ApJ, submitted (astro-ph/0312034)
Massey, P., Parker, J. W., & Garmany, C. D. 1989, AJ, 98, 1305
Meyssonnier, N., & Azzopardi, M. 1993, A&AS, 102, 451 [MA93]
Nazé Y., Hartwell, J. M., Stevens, I. R., Corcoran, M. F., Chu, Y.-H., Koenigsberger, G., Moffat, A. F. J., & Niemela, V. S. 2002, ApJ, 580, 225 (Paper I)
Nazé, Y., Hartwell, J. M., Stevens, I. R., Manfroid, J., Marchenko, S., Corcoran, M. F., Moffat, A. F. J., & Skalkowski, G. 2003, ApJ, 586, 983 (Paper II) [NHS2003]
Sana, H., Stevens, I. R., Gosset, E., Rauw, G., & Vreux, J.-M. 2004, MNRAS, in press
Sasaki, M., Haberl, F., & Pietsch, W. 2000, A&AS, 147, 75 [SHP2000]
Sasaki, M., Pietsch, W., & Haberl, F. 2003, A&A, 403, 901
Sterken, C., & Breysacher, J. 1997, A&A, 328, 269
Strüder, L., et al. 2001, A&A, 365, L18
Tsujimoto, M., Imanishi, K., Yokogawa, J., & Koyama, K. 1999, PASJ, 51, L21
Turner, M. J. L., et al. 2001, A&A, 365, L27
XMM-Newton Survey Science Centre Consortium 2003, XMM-Newton Serendipitous Source Catalog
Ye, T., Turtle, A. J., & Kennicutt, R. C., Jr. 1991, MNRAS, 249, 722
Yokogawa, J., Imanishi, K., Tsujimoto, M., Nishiuchi, M., Koyama, K., Nagase, F., & Corbet, R. H. D. 2000, ApJS, 128, 491 [YIT2000]
