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X ray spectra of cataclysmic variables
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Patterson, Joseph Halpern Sr., Jules |
| Copyright Year | 1990 |
| Description | X ray spectral parameters of cataclysmic variables observed with the 'Einstein' imaging proportional counter were determined by fitting an optically thin, thermal bremsstrahlung spectrum to the raw data. Most of the sources show temperatures of order a few keV, while a few sources exhibit harder spectra with temperatures in excess of 10 keV. Estimated 0.1 to 3.5 keV luminosities are generally in the range from 10(exp 30) to 10(exp 32) erg/sec. The results are consistent with the x rays originating in a disk/white dwarf boundary layer of non-magnetic systems, or in a hot, post-shock region in the accretion column of DQ Her stars, with a negligible contribution from the corona of the companion. In a few objects column densities were found that are unusually high for interstellar material. It was suggested that the absorption occurs in the system itself. |
| File Size | 1389370 |
| Page Count | 34 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900019964 |
| Archival Resource Key | ark:/13960/t8bg7kp8f |
| Language | English |
| Publisher Date | 1990-09-20 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Stellar Spectra Coronas Cataclysmic Variables Bremsstrahlung Spectrum Analysis Imaging Techniques Proportional Counters Brightness Temperature X Ray Spectra Stellar Luminosity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
