The nature of 1WGA J1958.2+3232: A new intermediate polar

Details The nature of 1WGA J1958.2+3232: A new intermediate polar The nature of 1WGA J1958.2+3232: A new intermediate polar

1999-12-23

arxiv.org/abs/astro-ph/9912494v1

Astron.Astrophys. 354 (2000) L29

Astronomy and Astrophysics

Astrophysics

Four pages, 4 figures, uses aa.cls Accepted for publication in A&A Letters

Scientific paper

We present low and intermediate resolution spectroscopy of the optical counterpart to the recently discovered pulsating X-ray source 1WGA J1958.2+3232. The presence of strong HI, HeI and HeII emission lines together with the absence of absorption features rules out the possibility that the object is a massive star, as had recently been suggested. The observed X-ray and optical characteristics are consistent with the object being an intermediate polar. The double-peaked structure of the emission lines indicates that an accretion disc is present.

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