2000MNRAS.311..169C -
Mon. Not. R. Astron. Soc., 311, 169-175 (2000/January-1)
OGLE observations of four X-ray binary pulsars in the Small Magellanic Cloud.
COE M.J. and OROSZ J.A.
Abstract (from CDS):
This paper presents analysis and interpretation of OGLE photometric data of four X-ray binary pulsar systems in the Small Magellanic Cloud (SMC): 1WGA J0054.9-7226, RX J0050.7-7316, RX J0049.1-7250 and 1SAX J0103.2-7209. In each case, the probable optical counterpart is identified on the basis of its optical colours. In the case of RX J0050.7-7316 the regular modulation of its optical light curve appears to reveal an ellipsoidal modulation with a period of 1.416d. Using reasonable masses for the neutron star and the B star, we show that the amplitude and relative depths of the minima of the I-band light curve of RX J0050.7-7316 can be matched with an ellipsoidal model where the B star nearly fills its Roche lobe. For mass ratios in the range of 0.12 to 0.20, the corresponding best-fitting inclinations are about 55° or larger. The neutron star would be eclipsed by the B star at inclinations larger than ~60° for this particular mass ratio range. Thus RX J0050.7-7316 is a good candidate system for further study. In particular, we would need additional photometry in several colours, and most importantly, radial velocity data for the B star before we could draw more quantitative conclusions about the component masses.
Abstract Copyright:
2000, Royal Astronomical Society
Journal keyword(s):
binaries: general - stars: emission-line, Be - Magellanic Clouds
Simbad objects:
15
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2000MNRAS.311..169C and select 'bookmark this link' or equivalent in the popup menu