Curious Variables Experiment (CURVE). RZ LMi - the Most Active SU UMa Star

• Autorzy: Olech A. , Wiśniewski M. , Złoczewski K. , Cook L. M. , Mularczyk K. , Kędzierski P.
• Języki publikacji: EN

Abstrakty

EN

We report extensive photometry of the frequently outbursting dwarf nova RZ Leo Minoris. During two seasons of observations we detected 12 superoutbursts and 7 normal outbursts. The V magnitude of the star varied in range from 16.5 mag to 13.9 mag. The superoutbursts occur quite regularly flashing every 19.07(4) days and lasting slightly over 10 days. The average interval between two successive normal outbursts is 4.027(3) days. The mean superhump period observed during the superoutbursts is P_sh=0.059396(4) days (85.530±0.006 min). The period of the superhumps was constant except for one superoutburst when it increased with a rate of P/P_sh=7.6(1.9)×10^-5. Our observations indicate that RZ LMi enters the stage of permanent superhumps, both in superoutbursts and quiescence. This may indicate that decoupling of thermal and tidal instabilities play important role in ER UMa systems. No periodic light variations which can be connected with orbital period of the binary were seen, thus the mass ratio and evolutionary status of RZ LMi are still unknown.

Słowa kluczowe

EN

Stars: individual: RZ LMi; binaries: close; novae; cataclysmic variables

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2008
• Tom: Vol. 58, No. 2
• Strony: 131--152
• Opis fizyczny: Bibliogr. 36 poz., tab., wykr.

Twórcy

autor

Olech A.

• Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warszawa, Poland

autor

Wiśniewski M.

• Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warszawa, Poland

autor

Złoczewski K.

• Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, ul. Bartycka 18, 00-716 Warszawa, Poland

autor

Cook L. M.

• Center for Backyard Astrophysics (Concord), 1730 Helix Court, Concord, CA 94518, USA

autor

Mularczyk K.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-476 Warszawa, Poland

autor

Kędzierski P.

• Warsaw University Observatory, Al. Ujazdowskie 4, 00-476 Warszawa, Poland

Bibliografia

• Berry, R., and Burnell, J. 2000, “The Handbook of Astronomical Imaging Processing”, Willmann-Bell, Inc., Richmond, VA, USA.
• Gao, W., Li, Z., Wu, X., Zhang, Z., and Li, Y. 1999, ApJ, 527, L55.
• Green, R.F., Ferguson, D.H., Liebert, J., and Schmidt, M. 1982, PASP, 94, 560.
• Green, R.F., Schmidt, M., and Liebert, J. 1986, ApJS, 61, 305.
• Hellier, C. 2001, PASP, 113, 469.
• Henden, A.A., and Honeycutt, R.K. 1995, PASP, 107, 324.
• Ishioka, R., Kato, T., Uemura, M., Iwamatsu, H., Matsumoto, K., Martin, B.E., Billings, G.W., and Novak, R. 2001, PASJ, 53, L51.
• Kato, T., Nogami, D., and Baba, H. 1996, PASJ, 48, L93.
• Kato, T. 2001, PASJ, 53, L17.
• Kato, T., Nogami, D., and Masuda, S. 2003, PASJ, 55, L7.
• Lipovetskij, V., and Stepanjan, J. 1981, Astrophysics, 17, 573.
• Misslet, K.A., and Shafter, A.W. 1995, AJ, 109, 1757.
• Nogami, D., Kato, T., Masuda, S., Hirata, R., Matsumoto, K., Tanabe, K., and Yokoo, T. 1995, PASJ, 47, 897.
• Olech, A., Schwarzenberg-Czerny, A., Kędzierski, P., Złoczewski, K., Mularczyk, K., and Wiśniewski, M. 2003a, Acta Astron., 53, 175.
• Olech, A., Złoczewski, K., Mularczyk, K., Kędzierski, P., Wiśniewski, M., and Stachowski, G. 2004, Acta Astron., 54, 57.
• Olech, A., Mularczyk, K., Kędzierski, P., Złoczewski, K., Wiśniewski, M., and Szaruga, K. 2006, A&A, 2006, 933.
• Olech, A., Rutkowski, A., and Schwarzenberg-Czerny, A. 2007, Acta Astron., 57, 331.
• Osaki, Y. 1995, PASJ, 47, L11.
• Osaki, Y. 1996, PASP, 108, 39.
• Patterson, J., Jablonski, F., Koen, C., O’Donoghue, D., and Skillman, D.R. 1995, PASP, 107, 1183.
• Patterson, J. 1998, PASP, 110, 1132.
• Patterson, J. 2001, PASP, 113, 736.
• Retter, A., Chou, Y., Bedding, T.R., and Naylor, T. 2002, MNRAS, 330, L37.
• Robertson, J.W., Honeycutt, R.K., and Turner, G.W. 1995, PASP, 107, 443.
• Rutkowski, A., Olech, A.,Mularczyk, K., Boyd, D., Koff, R., and Wiśniewski,M. 2007, Acta Astron., 57, 267.
• Schreiber, M.R, and Lasota, J.-P. 2007, A&A, 473, 897.
• Schwarzenberg-Czerny, A. 1996, ApJ, 460, L107.
• Skillman, D.R., and Patterson, J. 1993, ApJ, 417, 298.
• Smak, J. 2000, New A, 44, 171.
• Stetson, P.B. 1987, PASP, 99, 191.
• Szkody, P., and Howell, S.B. 1992, ApJS, 78, 537.
• Thorstensen, J.R., Taylor, C.J., Becker, C.M., and Remillard, R.A. 1997, PASP, 109, 477.
• Thorstensen, J.R., Patterson, J., Kemp, J., and Vennes, S. 2002, PASP, 114, 1108.
• Udalski, A., and Pych, W. 1992, Acta Astron., 42, 285.
• Warner, B. 1995, “Cataclysmic Variable Stars”, Cambridge University Press.
• Zhao, Y., Li, Z., Wu, X., Peng, Q., Zhang, Z., and Li, Z. 2006, PASJ, 58, 367.