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Southworth, J. (John); Copperwheat, C. M.; Gaensicke, B. T. (Boris T.); Pyrzas, S. (2010)
Publisher: EDP Sciences
Languages: English
Types: Article
Subjects: QB
We present photometry of nine cataclysmic variable stars identified by the Sloan Digital Sky Survey, aimed at measuring the orbital periods of these systems. Four of these objects show deep eclipses, from which we measure their orbital periods. The light curves of three of the eclipsing systems are also analysed using the lcurve code, and their mass ratios and orbital inclinations determined.\ud SDSS J075059.97+141150.1 has an orbital period of 134.1564 ± 0.0008 min, making it a useful object with which to investigate the evolutionary processes of cataclysmic variables. SDSS J092444.48+080150.9 has a period of 131.2432 ± 0.0014 min and is probably magnetic. The white dwarf ingress and egress phases are very deep and short, and there is no clear evidence that this object has an\ud accretion disc. SDSS J115207.00+404947.8 and SDSS J152419.33+220920.1 are nearly identical twins, with periods of 97.5 ± 0.4 and 93.6 ± 0.5 min and mass ratios of 0.14 ± 0.03 and 0.17 ± 0.03, respectively. Their eclipses have well-defined white dwarf and bright spot ingress and egress features, making them excellent candidates for detailed study. All four of the orbital periods presented\ud here are shorter than the 2–3 h period gap observed in the known population of cataclysmic variables.
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    • Bailey, J. 1979, MNRAS, 187, 645
    • Bertin, E., & Arnouts, S. 1996, A&AS, 117, 393
    • Beuermann, K. 2006, A&A, 460, 783
    • Beuermann, K., Baraffe, I., Kolb, U., & Weichhold, M. 1998, A&A, 339, 518 Bruch, A. 1992, A&A, 266, 237
    • Bruch, A. 2000, A&A, 359, 998
    • Buzzoni, B., Delabre, B., Dekker, H., et al. 1984, The Messenger, 38, 9 Copperwheat, C. M., Marsh, T. R., Dhillon, V. S., et al. 2010, MNRAS, 402, 1824
    • de Kool, M. 1992, A&A, 261, 188
    • de Kool, M., & Ritter, H. 1993, A&A, 267, 397
    • Dhillon, V. S., Marsh, T. R., Stevenson, M. J., et al. 2007, MNRAS, 378, 825 Dillon, M., Gänsicke, B. T., Aungwerojwit, A., et al. 2008, MNRAS, 386, 1568 Downes, R. A., Webbink, R. F., Shara, M. M., et al. 2001, PASP, 113, 764 Drake, A. J., Djorgovski, S. G., Mahabal, A., et al. 2009, ApJ, 696, 870 Gänsicke, B. T., Szkody, P., de Martino, D., et al. 2003, ApJ, 594, 443 Gänsicke, B. T., Araujo-Betancor, S., Hagen, H.-J., et al. 2004, A&A, 418, 265 Gänsicke, B. T., Rodríguez-Gil, P., Marsh, T. R., et al. 2006, MNRAS, 365, 969 Gänsicke, B. T., Dillon, M., Southworth, J., et al. 2009, MNRAS, 397, 2170 Hellier, C. 2001, Cataclysmic Variable Stars: How and Why they Vary, SpringerPraxis books in astronomy and space science (New York: Springer Verlag) Jordi, K., Grebel, E. K., & Ammon, K. 2006, A&A, 460, 339 Knigge, C. 2006, MNRAS, 373, 484
    • Kolb, U. 1993, A&A, 271, 149
    • Kolb, U., & Baraffe, I. 1999, MNRAS, 309, 1034
    • Kolb, U., & de Kool, M. 1993, A&A, 279, L5
    • Lawrence, A., Warren, S. J., Almaini, O., et al. 2007, MNRAS, 379, 1599 Littlefair, S. P., Dhillon, V. S., Marsh, T. R., et al. 2006, Science, 314, 1578 Littlefair, S. P., Dhillon, V. S., Marsh, T. R., et al. 2007, MNRAS, 381, 827 Littlefair, S. P., Dhillon, V. S., Marsh, T. R., et al. 2008, MNRAS, 388, 1582 Morrissey, P., Conrow, T., Barlow, T. A., et al. 2007, ApJS, 173, 682 Nebot Gómez-Morán, A., Schwope, A. D., Schreiber, M. R., et al. 2009, A&A, 495, 561
    • Politano, M. 1996, ApJ, 465, 338
    • Politano, M. 2004, ApJ, 604, 817
    • Press, W. H., Teukolsky, S. A., Vetterling, W. T., & Flannery, B. P. 1992, Numerical recipes in FORTRAN 77. The art of scientific computing (2nd edn.) (Cambridge: University Press)
    • Pyrzas, S., Gänsicke, B. T., Marsh, T. R., et al. 2009, MNRAS, 394, 978 Rebassa-Mansergas, A., Gänsicke, B. T., Rodríguez-Gil, P., Schreiber, M. R., & Koester, D. 2007, MNRAS, 382, 1377
    • Ritter, H., & Kolb, U. 2003, A&A, 404, 301
    • Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525 Southworth, J., Gänsicke, B. T., Marsh, T. R., et al. 2006, MNRAS, 373, 687 Southworth, J., Gänsicke, B. T., Marsh, T. R., de Martino, D., & Aungwerojwit, A. 2007a, MNRAS, 378, 635
    • Southworth, J., Marsh, T. R., Gänsicke, B. T., et al. 2007b, MNRAS, 382, 1145 Southworth, J., Gänsicke, B. T., Marsh, T. R., et al. 2008a, MNRAS, 391, 591 Southworth, J., Townsley, D. M., & Gänsicke, B. T. 2008b, MNRAS, 388, 709 Southworth, J., Hickman, R. D. G., Marsh, T. R., et al. 2009a, A&A, 507, 929 Southworth, J., Hinse, T. C., Burgdorf, M. J., et al. 2009b, MNRAS, 399, 287 Southworth, J., Hinse, T. C., Dominik, M., et al. 2009c, ApJ, 707, 167 Southworth, J., Hinse, T. C., Jørgensen, U. G., et al. 2009d, MNRAS, 396, 1023 Spruit, H. C., & Ritter, H. 1983, A&A, 124, 267
    • Stetson, P. B. 1987, PASP, 99, 191
    • Szkody, P., Fraser, O., Silvestri, N., et al. 2003, AJ, 126, 1499 Szkody, P., Henden, A., Fraser, O. J., et al. 2005, AJ, 129, 2386 Szkody, P., Henden, A., Agüeros, M., et al. 2006, AJ, 131, 973 Szkody, P., Henden, A., Mannikko, L., et al. 2007, AJ, 134, 185 Szkody, P., Anderson, S. F., Hayden, M., et al. 2009, AJ, 137, 4011 Thorstensen, J. R., Fenton, W. H., Patterson, J., et al. 2002, PASP, 114, 1117 Townsley, D. M., & Gänsicke, B. T. 2009, ApJ, 693, 1007 Warner, B. 1995, Cataclysmic Variable Stars, Cambridge Astrophysics Series (Cambridge, UK: Cambridge University Press)
    • Webbink, R. F., & Wickramasinghe, D. T. 2002, MNRAS, 335, 1 Whyte, C. A., & Eggleton, P. P. 1980, MNRAS, 190, 801
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