Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...261l..35k&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 261, Oct. 1, 1982, p. L35-L39.
Astronomy and Astrophysics
Astrophysics
32
Absorption Spectra, Eclipsing Binary Stars, Stellar Spectrophotometry, X Ray Sources, X Ray Spectra, Abundance, Heao 2, Interstellar Gas, Proportional Counters, Radiant Flux Density, Solid State Devices, Stellar Winds, Wind Velocity, X Ray Spectroscopy
Scientific paper
The HEAO 2 satellite's Solid State Spectrometer and Monitor Proportional Counter was used to observe one orbit of the massive X-ray binary Vela X-1. Using spectral fits to the data as a function of orbital phase, the column density and state of the material along the line of sight to the X-ray source has been inferred. The spectrum near orbital phase 0.2 compares favorably with absorption by neutral material with a column density corresponding to plausible values of stellar wind velocity law and total primary mass loss rate. Spectra at later orbital phases, which show unexpected strong absorption features near 2.0 and 2.5 keV, are interpreted as due to absorption by material with suppressed opacity below 2.0 keV. The opacity required to produce the observed features implies either the presence of an intense soft X-ray flux, or altered elemental abundances in the gas near Vela X-1.
Kallman Tim R.
White Nicholas E.
No associations
LandOfFree
The anomalous X-ray absorption spectrum of VELA X-1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The anomalous X-ray absorption spectrum of VELA X-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The anomalous X-ray absorption spectrum of VELA X-1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1029377