INFRARED PHOTOMETRY OF THE X-RAY BINARY XTE J1118+480 IN APRIL 2000статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:We present the IR photometry of the X-ray binary XTE J1118+480 performed during seven nights in April and two nights in May-June 2000. A significant IR excess has been detected in the object, which may be due to the thermal radiation from a dust envelope/cloud. The observed energy distribution in the range 1.25-3.5 micrometers can be interpreted in terms of the sum of the fluxes from an accretion disk with a temperature of about 20000 K and a dust envelope with grains heated to approximately 900 K. The distance to the X-ray binary estimated from the total flux from the dust envelope is no less than 0.6-3 kpc. The mean optical depth of the dust envelope for the accretion-disk radiation is about 0.06.