Observation of the ultra soft X-ray spectrum of HZ 43

Details Observation of the ultra soft X-ray spectrum of HZ 43 Observation of the ultra soft X-ray spectrum of HZ 43

Sep 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....69..145b&link_type=abstract

Astronomy and Astrophysics, vol. 69, no. 1, Sept. 1978, p. 145-148.

Astronomy and Astrophysics

Astrophysics

11

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

Scientific paper

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.

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