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ASCA observations of the nearby galaxies Dwingeloo 1 and Maffei 1 | | C.S.Reynolds
; A.J.Loan
; A.C.Fabian
; K.Makishima
; W.N.Brandt
; T.Mizuno
; | | Date: |
21 Nov 1996 | | Subject: | astro-ph | | Abstract: | We present ASCA observations of the nearby galaxies Dwingeloo 1 (Dw1) and Maffei 1 (Mf1). X-ray sources are clearly detected within 3 arcminutes of the optical nuclei of both galaxies. Despite the low Galactic latitude of these fields ($|b|<1degmark$) we conclude, on probability and spectral grounds, that the detected sources are intrinsic to these galaxies rather than foreground or background interlopers. The Dw1 source, designated Dw1-X1, is interpreted as being either a hyper-luminous X-ray binary (with a 0.5--10,keV luminosity of more than $10^{39}ergps$) or an X-ray bright supernova. The Mf1 emission is hard and extended, suggesting that it originates from a population of X-ray binaries. Prompted by the Dw1-X1 results, we discuss the nature of hyper-luminous X-ray binary systems. Such sources are commonly seen in nearby galaxies with a frequency of approximately one per galaxy. We present a possible connection between these luminous systems and Galactic superluminal sources. | | Source: | arXiv, astro-ph/9611171 | | Services: | Forum | Review | PDF | Favorites | |
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