SIMBAD references

2003AJ....126.2949C - Astron. J., 126, 2949-2953 (2003/December-0)

Periodic optical outbursts from the Be-neutron star binary AX J0049.4-7323.


Abstract (from CDS):

The optical light curve of the Be-neutron star binary AX J0049.4-7323 has been investigated using data from the MACHO and OGLE-II projects. This X-ray source, whose neutron star has a very slow rotation rate (Ppulse=755.5 s), shows optical outbursts every ∼394 days. The regularity of these outbursts suggests that their recurrence time is the orbital period of the system. During the outbursts, the system brightens and becomes slightly redder. A possible interpretation is that a portion of the equatorial disk is excited as the neutron star passes through it during periastron passage. In the intervals between outbursts, the light curve shows ∼11 day quasi-periodic variability, which may be associated with the rotation of the Be star's extended disk.

Abstract Copyright:

Journal keyword(s): Stars: Pulsars: Individual: Alphanumeric: AX J0049.4-7323 - Stars: Emission-Line, Be - Stars: Variables: Other - X-Rays

CDS comments: Par. 2 RX J0520.5-6921 is a misprint for RX J0520.5-6932

Simbad objects: 6

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