The Small Magellanic Cloud, Supersoft X-Ray Binary 1E 0035.4-7230 (SMC 13)

Details The Small Magellanic Cloud, Supersoft X-Ray Binary 1E 0035.4-7230 (SMC 13) The Small Magellanic Cloud, Supersoft X-Ray Binary 1E 0035.4-7230 (SMC 13)

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...489..903c&link_type=abstract

Astrophysical Journal v.489, p.903

Astronomy and Astrophysics

Astronomy

11

Accretion, Accretion Disks, Stars: Binaries: Close, Stars: Individual Alphanumeric: 1E 0035.4-7230, Galaxies: Magellanic Clouds, X-Rays: Stars

Scientific paper

Details of simultaneous photometric and spectroscopic observations of the optical counterpart of the "supersoft" X-ray source in the Small Magellanic Cloud, 1E 0035.4-7230 (SMC 13), are presented. Although the spectrum is dominated by emission lines of He II, the Balmer series of hydrogen is also present in emission with a strong decrement, and Balmer lines are seen as broad absorptions. Several high-ionization emission features are also present, including O VI (at 3811, 3834, and 5290 Angstroms). Radial velocities and photometry confirm that the binary period is ~0.d1719, and an improved value of the period is derived from 4 years of photometry and analysis of ROSAT HRI X-ray data. The orbital light variation is primarily due to an eclipse of the extensive accretion disk. X-ray and optical minima occur together. The UBV light curves are similar to each other, and no clear phase-related color variations are found. He II emission-line velocities show a semiamplitude of K ~ 100 km s-1, and maximum velocity occurs when the light curve indicates that the compact star would be moving away from the observer, suggesting that this emitting region may trace the orbital motion of the compact star. The range of possible masses implied for the X-ray source lies between 0.5 and 1.5 M&sun; if the mass donor is a main-sequence star filling its Roche lobe. The light curve suggests values at the high end of this range. The broad H absorption lines appear to have a much larger velocity amplitude and a lower systemic velocity, making it difficult to understand their origin. We discuss possible models for the system.

Affiliated with

Also associated with

No associations

Rating

The Small Magellanic Cloud, Supersoft X-Ray Binary 1E 0035.4-7230 (SMC 13) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The Small Magellanic Cloud, Supersoft X-Ray Binary 1E 0035.4-7230 (SMC 13), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Small Magellanic Cloud, Supersoft X-Ray Binary 1E 0035.4-7230 (SMC 13) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1685529