Publikationsdatum:
2019-06-28
Beschreibung:
The paper presents a 10 keV to 1 MeV X-ray spectrum of Cyg X-1 in its low state, accumulated over 3 months in 1977 and 1978. The spectrum is smooth up to 300 keV. The excess at higher energy may be interpreted as a broad 511 keV emission line from the annihilation of positrons. The width and centroid of the line indicate that the temperature of the line-emitting region is 20-200 keV. The feature could also be caused by Comptonized emission from a 165 keV region.
Schlagwort(e):
ASTROPHYSICS
Materialart:
Astrophysical Journal; vol. 265
Format:
text
