Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998cha%26a..22..463l&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 22, Issue 4, p. 463-468.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Our spectroscopic observation of the Be/X-ray binary LSI+65°010 showed a dramatic variation in November 1992 with an increase by a factor of more than 3 in the equivalent width of the Hα emission line. This supports the view that the primary is a Be star rather than a supergiant. A well-defined double-peaked profile in seen in the spectrum of September 1994: while the red peak remained at 6563 Å, the blue one was -7.2Å to the blue. We suggest that such a profile is caused by the superposition of two emission lines, one from the shell of the Be star, one from an H II region around the neutron star. This provides, for the first time, direct observational evidence for the existence of a H II region around compact object and caused by X-ray emission. On 1992-11-04, the red side of the Hα line did not change while the blue side was greatly enhanced. We suggest that this may be caused by the H II region around the neutron star.
Hang Heng-Rong
Liu Zing-Zhong
Xia Jian-Ping
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