A 421-d activity cycle in the BeX recurrent transient A0538-66 from MACHO monitoring Academic Article uri icon

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abstract

  • We present a ~ 5-yr optical light curve of the recurrent Be/X-ray transient A0538-66 obtained as a by-product of the MACHO Project. These data reveal both a long-term modulation at P = 420.8 +/- 0.8 d and a short-term modulation at 16.6510 +/- 0.0022 d which, within errors, confirms the previously found orbital period. Furthermore, the orbital activity is only seen at certain phases of the 421 d cycle suggesting that the long-term modulation is related to variations in the Be star envelope.

authors

  • Alcock, C
  • Allsman, RA
  • Alves, DR
  • Axelrod, TS
  • Becker, AC
  • Bennett, DP
  • Charles, PA
  • Cook, KH
  • Drake, AJ
  • Freeman, KC
  • Geha, M
  • Griest, K
  • Lehner, MJ
  • Marshall, SL
  • McGowan, KE
  • Minniti, D
  • Nelson, CA
  • Peterson, BA
  • Popowski, P
  • Pratt, MR
  • Quinn, PJ
  • Stubbs, CW
  • Sutherland, W
  • Tomaney, AB
  • Vandehei, T
  • Welch, Douglas L

publication date

  • March 11, 2001