Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...265..363c&link_type=abstract
Astrophysical Journal, Part 1, vol. 265, Feb. 1, 1983, p. 363-371. Research sponsored by the U.S. Department of Energy Science
Astronomy and Astrophysics
Astronomy
10
Binary Stars, Optical Emission Spectroscopy, Pulsars, Ultraviolet Spectroscopy, X Ray Sources, Iue, Light Curve, Magnetic Stars, Spaceborne Astronomy, Stellar Rotation, Temporal Resolution, Visible Spectrum
Scientific paper
Simultaneous ultraviolet and optical spectral measurements of the pulsating X-ray source H2252-035 have been made about its 3.6 hr binary orbital cycle with a time resolution of 30-70 minutes. A 2200 Å feature in the continous spectral distribution of the object suggests an amount of reddening corresponding to E(B-V) = 0.10 with 3 σ upper and lower bounds of 0.14 and 0.02. A two-component spectrum consisting of a power law with a spectral index α = 2.74 and a blackbody with a temperature T = 1.34 × 104K fits all the data on H2252-035 from 1200 to 22000 Å. The UV spectra exhibit emission lines of N V λ1240, Si IV λ1400, C IV λ1549, and Mg II λ2800. The emission line intensities are variable by about a factor of 2. Models for explaining these variations are briefly discussed.
Cordova France A.
Fenimore Edward E.
Mason Keith O.
Middleditch John
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