Observation of the ultra soft X-ray spectrum of HZ 43.
Abstract
Ultrasoft X-ray spectra in the range 60-250 eV of the hot white dwarf HZ 43 were obtained with a rocket-borne soft X-ray instrument comprising two principal detection systems: (1) a one-dimensional X-ray focusing collector with a position-sensitive focal-plane detector, and (2) large-area collimated proportional counters with several different entrance windows. The data indicate that emission in terms of a hot corona can be discarded; black body models with effective temperature of 60,000-160,000 K yield acceptable fits to all data sets. The X-ray data are in excellent agreement with a blackbody of T = 110,000 K, R = 5 x 10 to the 8th cm derived by Margon et al. (1976) based on EUV and optical observations of HZ 43.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- September 1978
- Bibcode:
- 1978A&A....69..145B
- Keywords:
-
- Stellar Coronas;
- Stellar Spectra;
- White Dwarf Stars;
- X Ray Sources;
- Black Body Radiation;
- Emission Spectra;
- Energy Spectra;
- Focal Plane Devices;
- Rocket-Borne Instruments;
- X Ray Spectra;
- Astrophysics;
- White Dwarfs:X Rays