The first UV studies of the optical candidate for the X-ray source 1118-61

Details The first UV studies of the optical candidate for the X-ray source 1118-61 The first UV studies of the optical candidate for the X-ray source 1118-61

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985ap%26ss.109..175c&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 109, no. 1, Feb. 1985, p. 175-181.

Astronomy and Astrophysics

Astrophysics

14

Ultraviolet Spectra, X Ray Sources, Absorption Spectra, B Stars, Carbon, Distance, Iue, Stellar Mass Ejection

Scientific paper

The X-ray pulsator, 1118-61, discovered in 1975 by the Ariel-5 satellite, has been observed for the first time at UV wavelengths using IUE. Its UV spectrum clearly identifies the optical counterpart as a Be star similar to that seen in other X-ray pulsators. From the 2200 Å absorption feature a distance estimate of ≡4 kpc is obtained and the carbon-IV profile reveals the mass loss rate from the primary. The discrepancy seen in other similar systems between the optical/UV mass loss rate and that needed to power the X-ray source is also observed in this source. Possible models are reviewed.

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