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

C. Alcock; R. A. Allsman; D. R. Alves; T. S. Axelrod; A. C. Becker; D. P. Bennett; P. A. Charles; K. H. Cook; A. J. Drake; K. C. Freeman; M. Geha; K. Griest; M. J. Lehner; S. L. Marshall; K. E. McGowan; D. Minniti; C. A. Nelson; B. A. Peterson; P. Popowski; M. R. Pratt; P. J. Quinn; C. W. Stubbs; W. Sutherland; A. B. Tomaney; T. Vandehei; D. L. Welch

doi:10.1046/j.1365-8711.2001.04041.x

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

C. Alcock, R. A. Allsman, D. R. Alves, T. S. Axelrod, A. C. Becker, D. P. Bennett, P. A. Charles, K. H. Cook, A. J. Drake, K. C. Freeman, M. Geha, K. Griest, M. J. Lehner, S. L. Marshall, K. E. McGowan, D. Minniti, C. A. Nelson, B. A. Peterson, P. Popowski, M. R. PrattP. J. Quinn, C. W. Stubbs, W. Sutherland, A. B. Tomaney, T. Vandehei, D. L. Welch

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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.

Original language	English
Pages (from-to)	678-684
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	321
Issue number	4
DOIs	https://doi.org/10.1046/j.1365-8711.2001.04041.x
Publication status	Published - 11 Mar 2001

Keywords

Binaries: Close
Stars: Individual: A0538-66
X-rays: Stars

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1046/j.1365-8711.2001.04041.x

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Alcock, C., Allsman, R. A., Alves, D. R., Axelrod, T. S., Becker, A. C., Bennett, D. P., Charles, P. A., Cook, K. H., Drake, A. J., Freeman, K. C., Geha, M., Griest, K., Lehner, M. J., Marshall, S. L., McGowan, K. E., Minniti, D., Nelson, C. A., Peterson, B. A., Popowski, P., ... Welch, D. L. (2001). A 421-d activity cycle in the BeX recurrent transient A0538-66 from MACHO monitoring. Monthly Notices of the Royal Astronomical Society, 321(4), 678-684. https://doi.org/10.1046/j.1365-8711.2001.04041.x

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title = "A 421-d activity cycle in the BeX recurrent transient A0538-66 from MACHO monitoring",

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.",

keywords = "Binaries: Close, Stars: Individual: A0538-66, X-rays: Stars",

author = "C. Alcock and Allsman, {R. A.} and Alves, {D. R.} and Axelrod, {T. S.} and Becker, {A. C.} and Bennett, {D. P.} and Charles, {P. A.} and Cook, {K. H.} and Drake, {A. J.} and Freeman, {K. C.} and M. Geha and K. Griest and Lehner, {M. J.} and Marshall, {S. L.} and McGowan, {K. E.} and D. Minniti and Nelson, {C. A.} and Peterson, {B. A.} and P. Popowski and Pratt, {M. R.} and Quinn, {P. J.} and Stubbs, {C. W.} and W. Sutherland and Tomaney, {A. B.} and T. Vandehei and Welch, {D. L.}",

year = "2001",

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doi = "10.1046/j.1365-8711.2001.04041.x",

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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, DL 2001, 'A 421-d activity cycle in the BeX recurrent transient A0538-66 from MACHO monitoring', Monthly Notices of the Royal Astronomical Society, vol. 321, no. 4, pp. 678-684. https://doi.org/10.1046/j.1365-8711.2001.04041.x

TY - JOUR

T1 - A 421-d activity cycle in the BeX recurrent transient A0538-66 from MACHO monitoring

AU - Alcock, C.

AU - Allsman, R. A.

AU - Alves, D. R.

AU - Axelrod, T. S.

AU - Becker, A. C.

AU - Bennett, D. P.

AU - Charles, P. A.

AU - Cook, K. H.

AU - Drake, A. J.

AU - Freeman, K. C.

AU - Geha, M.

AU - Griest, K.

AU - Lehner, M. J.

AU - Marshall, S. L.

AU - McGowan, K. E.

AU - Minniti, D.

AU - Nelson, C. A.

AU - Peterson, B. A.

AU - Popowski, P.

AU - Pratt, M. R.

AU - Quinn, P. J.

AU - Stubbs, C. W.

AU - Sutherland, W.

AU - Tomaney, A. B.

AU - Vandehei, T.

AU - Welch, D. L.

PY - 2001/3/11

Y1 - 2001/3/11

N2 - 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.

AB - 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.

KW - Binaries: Close

KW - Stars: Individual: A0538-66

KW - X-rays: Stars

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U2 - 10.1046/j.1365-8711.2001.04041.x

DO - 10.1046/j.1365-8711.2001.04041.x

M3 - Article

AN - SCOPUS:18044404424

SN - 0035-8711

VL - 321

SP - 678

EP - 684

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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