A Study of Stellar Photometric Variability Within the Central 4 pc of the Galactic Center with Infrared Image Subtraction

• Autorzy: Peeples M. S. , Stanek K. Z. , DePoy D. L.
• Języki publikacji: EN

Abstrakty

EN

We present a catalog of 110 variable stars within ≈1' of Sgr A* based on image subtraction of near-infrared (H and K) photometry. Our images were obtained over 133 nights from 2000 to 2002 in H-band and over 134 nights from 2001 to 2002 in K-band; the typical FWHM is 1".4. We match the catalog to other near-infrared, X-ray, and radio (i.e., maser) data, and we discuss some of the more interesting objects. The catalog includes 14 sources with measurable periods, several known long-period variables and three new LPV candidates. We associate IRS 10* with OH, SiO, and H2O masers and a bright X-ray point source; this analysis suggests IRS 10* is an AGB star with an accreting companion. Among the ≈90 newly discovered sources are a probable cataclysmic variable, a potential edge-on contact 84 day period eclipsing binary, and a possible 41 day period pulsating variable.

Słowa kluczowe

EN

Galaxy: center; Stars: variables: general

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2007
• Tom: Vol. 57, No. 2
• Strony: 173--199
• Opis fizyczny: Bibliogr. 55 poz., rys., tab., wykr.

Twórcy

autor

Peeples M. S.

• Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH43210, USA

autor

Stanek K. Z.

• Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH43210, USA

autor

DePoy D. L.

• Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH43210, USA

Bibliografia

• Alard, C. 2000, Astron. Astrophys. Suppl. Ser., 144, 363.
• Alard, C., and Lupton, R.H. 1998, Astrophys. J., 503, 325.
• Benedict, G.F., et al. 2007, Astron. J., 133, 1810.
• Blackman, E.G., Frank, A.,Markiel, J.A., Thomas, J.H., and Van Horn, H.M. 2001, Nature, 409, 485.
• Blum, R.D., Ramírez, S.V., Sellgren, K., and Olsen, K. 2003, Astrophys. J., 597, 323.
• Blum, R.D., Sellgren, K., and DePoy, D.L. 1996a, Astrophys. J., 470, 864.
• Blum, R.D., Sellgren, K., and DePoy, D.L. 1996b, Astron. J., 112, 1988.
• Clark, J.S., Larionov, V.M., and Arkharov, A. 2005, Astron. Astrophys., 435, 239.
• Deguchi, S., Fujii, T., Miyoshi, M., and Nakashima, J.-I. 2002, PASJ, 54, 61.
• DePoy, D.L., et al. 2003, in: “Instrument Design and Performance for Optical/Infrared Groundbased Telescopes”, Edited by Iye, Masanori;Moorwood, Alan F.M. Proceedings of the SPIE, Volume 4841, pp. 827-838.
• DePoy, D.L., Pepper, J., Pogge, R.W., Stutz, A., Pinsonneault, M., and Sellgren, K. 2004, Astrophys. J., 617, 1127.
• Efstathiou, G. 2000, MNRAS, 317, 697.
• Eisenhauer, F., et al. 2005, Astrophys. J., 628, 246.
• Genzel, R., Thatte, N., Krabbe, A., Kroker, H., and Tacconi-Garman, L.E. 1996, Astrophys. J., 472, 153.
• Glass, I.S., Matsumoto, S., Carter, B.S., and Sekiguchi, K. 2001, MNRAS, 321, 77.
• Hartman, J.D., Bakos, G., Stanek, K.Z., and Noyes, R.W. 2004, Astron. J., 128, 1761.
• Jackson, J.M., Geis, N., Genzel, R., Harris, A.I., Madden, S., Poglitsch, A., Stacey, G.J., and Townes, C.H. 1993, Astrophys. J., 402, 173.
• Karovska, M., Schlegel, E., Hack, W., Raymond, J.C., and Wood, B.E. 2005, Astrophys. J. Letters, 623, L137.
• Kastner, J.H., and Soker, N. 2004a, Astrophys. J., 608, 978.
• Kastner, J.H., and Soker, N. 2004b, Astrophys. J., 616, 1188.
• 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., and Kudritzki, R. 1995, Astrophys. J. Letters, 447, L95.
• Lacy, J.H., Townes, C.H., and Hollenbach, D.J. 1982, Astrophys. J., 262, 120.
• Laney, C.D., and Stobie, R.S. 1994, MNRAS, 266, 441.
• Levine, D.A., Figer, D.F., Morris, M., and McLean, I.S. 1995, Astrophys. J. Letters, 447, L101.
• Lindqvist, M., Winnberg, A., and Forster, J.R. 1990, Astron. Astrophys., 229, 165.
• Lindqvist,M.,Winnberg, A., Habing, H.J., and Matthews, H.E. 1992,, Astron. Astrophys. Suppl. Ser., 92, 43.
• Martins, F., et al. 2006,, Astrophys. J. Letters, 649, L103.
• Menten, K.M., Reid, M.J., Eckart, A., and Genzel, R. 1997, Astrophys. J. Letters, 475, L111.
• Muno, M.P., et al. 2004, Astrophys. J., 613, 1179.
• Najarro, F., Krabbe, A., Genzel, R., Lutz, D., Kudritzki, R.P., and Hillier, D.J. 1997, Astron. Astrophys., 325, 700.
• Nayakshin, S., and Sunyaev, R. 2005, MNRAS, 364, L23.
• Ott, T., Eckart, A., and Genzel, R. 1999, Astrophys. J., 523, 248.
• Paumard, T., et al. 2006, Astrophys. J., 643, 1011.
• Peeples, M.S., Bonanos, A.Z., DePoy, D.L., Stanek, K.Z., Pepper, J., Pogge, R.W., Pinsonneault, M.H., and Sellgren, K. 2007, Astrophys. J. Letters, 652, L61.
• Rafelski, M., Ghez, A.M., Hornstein, S.D., Lu, J.R., and Morris, M. 2007, Astrophys. J., 659, 1241.
• Reid, M.J., and Moran, J.M. 1981, Ann. Rev. Astron. Astrophys, 19, 231.
• Samus, N.N., and Durlevich, O.V. 2004, VizieR Online Data Catalog, 2250, 0.
• Scannapieco, E., Silk, J., and Bouwens, R. 2005, Astrophys. J. Letters, 635, L13.
• Scargle, J.D. 1982, Astrophys. J., 263, 835.
• Schlegel, D.J., Finkbeiner, D.P., and Davis, M. 1998, Astrophys. J., 500, 525.
• Schwarzenberg-Czerny, A. 1996, Astrophys. J. Letters, 460, L107.
• Scoville, N.Z., Stolovy, S.R., Rieke, M., Christopher, M., and Yusef-Zadeh, F. 2003, Astrophys. J., 594, 294.
• Silk, J. 1997, Astrophys. J., 481, 703.
• Sjouwerman, L.O. 1997, PhD thesis, AA (Onsala Space Observatory, Sweden).
• Sjouwerman, L.O., Lindqvist, M., van Langevelde, H.J., and Diamond, P.J. 2002, Astron. Astrophys., 391, 967.
• Skrutskie, M.F., et al. 2006, Astron. J., 131, 1163.
• Soker, N., and Zoabi, E. 2002, MNRAS, 329, 204.
• Soszyński, I., Udalski, A., Kubiak, M., Szymański, M.K., Pietrzyński, G., Żerbuń, K., Wyrzykowski, Ł., and Dziembowski, W.A. 2004, Acta Astron., 54, 347.
• Sterken, C., and Jaschek, C. 1996, “Light Curves of Variable Stars, A Pictorial Atlas”, ISBN 0521390168, Cambridge University Press, 1996..
• Stetson, P.B. 1987, P.A.S.P., 99, 191.
• Stetson, P.B. 1992, Journal Royal Astronomical Society of Canada, 86, 71.
• Tamura, M., Werner, M.W., Becklin, E.E., and Phinney, E.S. 1996, Astrophys. J., 467, 645.
• Trippe, S., et al. 2006, Astron. Astrophys., 448, 305.
• van der Hucht, K.A. 2001, New Astronomy Review, 45, 135.
• Wood, P.R., Habing, H.J., and McGregor, P.J. 1998, Astron. Astrophys., 336, 925.