NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T22:36:01 PDT
Help | Comment | NED Home

For refcode 1998AJ....115..525S:
Retrieve 16 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by American Astronomical Society. Reproduced by permission
1998AJ....115..525S ROSAT OBSERVATIONS OF X-RAY-FAINT S0 GALAXIES: NGC 1380 ERIC M. SCHLEGEL, ROBERT PETRE, AND MICHAEL LOEWENSTEIN Received 1997 August 31; revised 1997 October 21 ABSTRACT We used the ROSAT Position Sensitive Proportional Counter (PSPC) to obtain a 13 ks exposure and the ROSAT HRI to obtain a 42.5 ks exposure of the faint S0 galaxy NGC 1380. We show that the PSPC spectrum can be modeled as a thermal spectrum with kT ~ 0.5 keV, which is consistent with emission from a hot interstellar medium. We do not detect any emission from a hard component; the 90% upper limit is consistent with the trend for the scaled-up luminosities of X-ray-emitting point sources. The radial profiles from the PSPC and HRI data support the spectral fitting, because each profile is more sharply concentrated than the optical light (which reflects the stellar distribution), in contrast to other E/S0 galaxies. The PSPC radial profile is consistent with emission from a point source, because of the larger point-spread function; the HRI profile reveals the presence of extended hot gas. We also extend the L_X_-L_B_ plane, described by Matsumoto et al. in the range 10.8 < log L_B_ < 11.3, to log L_B_ ~ 10.5. We extend this plane separately for the hard discrete and the soft thermal components and show that the scaling relation for the hard component continues to at least log L_B_ ~ 10.5. Key words: galaxies: individual (NGC 1380)-X-rays
Retrieve 16 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home