Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pasj...49...93f&link_type=abstract
Publications of the Astronomical Society of Japan, v.49, p.93-100.
Astronomy and Astrophysics
Astronomy
9
Accretion Disks, Interstellar: Extinction, Photometry, Stars: Binaries, Stars: Individual (Ss 433)
Scientific paper
We present the results of VRI CCD photometric observations of SS 433 and VRI light-curve modelings for SS 433. Observations were carried out in the fall of 1995 using the 51-cm relfector at Osaka Kyoiku University. Three cycles of the binary phase were covered. The mean magnitudes and colors during the observational periods were V = 14.0, R = 11.1, I = 10.5; V - R = 2.88, V - I = 3.50, R - I = 0.62. On October 17 and 18 a strong flare was observed. Theoretical light curves were also calculated using a model in which SS 433 consists of a geometrically thick torus around a compact star and a companion star filling the Roche lobe. In the torus picture VRI light curves were first calculated; for appropriate parameters VRI model light curves well reproduce the observational profiles. In addition, the extinction was first derived from the magnitude difference between the obervation and the model; AV ~ 6--7, AR ~ 3--4, and AI ~ 3. These values are in good agreement with those of a previous observation.
Arimoto Jun'ichi
Awano Yumi
Fukue Jun
Honda Satoshi
Ishikawa Kaoru
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