EARLY SUPERHUMPS IN THE "KING OF THE SUPEROUTBURSTS" SYSTEM WZ SGE

Автор(и)

  • I. L Andronov Department of Astronomy and Astronomical observatory, Odessa National University, Ukraine
  • A. V. Yushchenko Department of Astronomy and Astronomical observatory, Odessa National University, Ukraine
  • P. G.. Niarchos Department of Astrophysics, Astronomy and Mechanics, University of Athens, GR 157 84 Zografos, Athens, Greece, Greece
  • K. Gazeas Department of Astrophysics, Astronomy and Mechanics, University of Athens, Greece

DOI:

https://doi.org/10.18524/1810-4215.2001.14.98403

Ключові слова:

Stars, variable, cataclysmic, UG SU, WZ Sge

Анотація

Time series analysis of 6 nights of CCD observations of WZ Sge after it's unexpected superoutburst on July 23, 2001 has shown highly asymmetric periodic variations with a period 0.d0566513(22), full amplitude 0.m218(4) and a very high asymmetry M - m = 0.670(9); a secondary minimum 0.38P after the main one. The initial epochs are Tmax = BJD2452118.7483(3) and Tmin = BJD52118.7670(2): The characteristics of the phase light curve are listed. In addition, we have found superhumps with a semi-amplitude of 0.m021(2) and an ephemeris Tmax,sh = BJD2452117.6830(8) + 0.d057435(45) E. Other peaks at 21 and 25 minutes possibly correspond to quasi-periodic oscillations with an effective semi-amplitude of 0.m014.

Посилання

Andronov LL: 1994, Odessa Astron. Publ, 7, 49.

Cannizzo J.K.: 2001, ApJ, 561, 175.

Faulkner J.: 1971, ApJ, 170, L99.

Gilliland R.L., Kemper E.: 1980, ApJ, 236, 854.

Greenstein J.L.: 1957, ApJ, 126, 23.

Kato T. Ohashi H., Ishioka R., et al.: 2001, IAUC, 7680.

Kopal Z.: 1986, Vistas in Astronomy, 29, 295.

Krzeminski W.: 1962, PASP, 74, 66.

Krzeminski W., Kraft. R.P.: 1964, ApJ, 140, 921.

Kukarkin B.W., Parenago P.P.: 1937, AZh., 14, 337.

Niarchos P.G.: 1978, Ap. Space Sci., 58, 301.

O’Donoghue D.: 2000, New Astr. Rev, 44, 45.

Osaki Y.: 1995, PASJ, 47, 470.

Patterson J.: 2001, PASP, 113, 784, 736.

Patterson J., McGraw J.T., Coleman L., Africano J.L.: 1981, ApJ, 248, 1067.

Patterson J., Richman H., Kemp J., Mukai K.: 1998, PASP, 110, 746, 403.

Petersen J.O.: 1986, As.Ap., 170, 59.

Ritter H., Kolb U.: 1998, As.Ap.Suppl, 129, 83.

Tutukov A.V, Yungelson L.R.: 1979, Acta Astr., 29, 665.

Warner B., Nather ER: 1972, MNRAS, 156, 297.

##submission.downloads##

Опубліковано

2017-04-10

Номер

Розділ

Статті