RX J0117.6-7330: Spectroscopy and Photometry
Roberto Soria, PASA, 16 (2), 147
The html and gzipped postscript versions of this paper are in preprint form.
To access the final published version, download the pdf file.
Next Section: Introduction
The Optical Counterpart of the X-ray Transient
RX J0117.6-7330: Spectroscopy and Photometry
Roberto Soria 1
1 Mount Stromlo Observatory, Private Bag, Weston Creek P.O., 2611, ACT, Australia
roberto@mso.anu.edu.au
Abstract:
We conducted spectroscopic and photometric observations of the optical companion of the X-ray transient RX J0117.6-7330 in the Small Magellanic Cloud, during a quiescent state. The primary star is identified as a B0.5IIIe with a mass
and bolometric magnitude
. The main spectral features are strong H emission, H and H emission cores with absorption wings, and narrow He I and O II absorption lines. Equivalent width and full width at half maximum of the main lines are listed. The average systemic velocity over our observing run is
km ; measurements over a longer period of time are needed to determine the binary period and the K velocity of the primary. We determine a projected rotational velocity
km for the Be star; if we assume a true rotational velocity at the equator
km , we deduce that the inclination angle of the system is
.
Keywords:
galaxies: Magellanic Clouds--stars: individual (RX J0117.6-7330)--X-ray: binaries
© Copyright Astronomical Society of Australia 1997