2001ApJ...546L..91K -
Astrophys. J., 546, L91-L95 (2001/January-2)
Detection of X-ray emission from galaxies inside the Bootes void.
KIM C., BOLLER T., GHOSH K.K., SWARTZ D.A. and RAMSEY B.D.
Abstract (from CDS):
We report the X-ray properties of Bootes void galaxies detected by the ROSAT All-Sky Survey (RASS). By searching the fields of 26 radio and 27 emission-line-selected void galaxies, we have detected nine X-ray-emitting void galaxies at greater than 2.7 σ confidence level. Five of these nine galaxies are in the IRAS subsample. Two of the IRAS galaxies were previously identified in positional cross-correlation studies of the RASS and IRAS Point Source Catalogue sources. Three of the X-ray-emitting galaxies are active galactic nuclei (AGNs; IRAS 14288+5255, Mrk 845, and IRAS 15195+5050), three are emission-line galaxies (PC 1357+4641, CG 547, and CG 922), and the remaining three are of unknown spectral type (IRAS 14500+4804, CG 637, and IRAS 15092+3940). The far-infrared flux levels of the AGN sources imply that most of the observed X-ray emissivity is from starburst activity. We have carried out timing and spectral analysis for the Seyfert 1 galaxy Mrk 845. Poor statistics prevents detailed analysis of the remaining sources. Only two galaxies in our sample, BHI 1514+3819 and FSS 1515+3823, were observed during ROSAT pointed observations resulting in a nondetection at the 1 σ level.
Abstract Copyright:
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Journal keyword(s):
Galaxies: Active - Galaxies: Seyfert - Galaxies: Statistics - Galaxies: Structure - X-Rays: Galaxies
Simbad objects:
15
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