UV/Optical Nuclear Activity in the gE Galaxy NGC 1399

Details UV/Optical Nuclear Activity in the gE Galaxy NGC 1399 UV/Optical Nuclear Activity in the gE Galaxy NGC 1399

2005-09-12

arxiv.org/abs/astro-ph/0509311v1

Astrophys.J.635:305-310,2005

Astronomy and Astrophysics

Astrophysics

18 pages, 2 figures, 1 table; accepted for publication in ApJ

Scientific paper

10.1086/497678

Using HST/STIS, we have detected far-ultraviolet nuclear activity in the giant elliptical galaxy NGC 1399, the central and brightest galaxy in the Fornax I cluster. The source reached a maximum observed far-UV luminosity of \~1.2 x 10e39 ergs/s in January 1999. It was detectable in earlier HST archival images in 1996 (B band) but not in 1991 (V band) or 1993 (UV). It faded by a factor of ~4x by mid-2000. The source is almost certainly associated with the low luminosity AGN responsible for the radio emission in NGC 1399. The properties of the outburst are remarkably similar to the UV-bright nuclear transient discovered earlier in NGC 4552 by Renzini et al. (1995). The source is much fainter than expected from its Bondi accretion rate (estimated from Chandra high resolution X-ray images), even in the context of "radiatively inefficient accretion flow" models, and its variability also appears inconsistent with such models. High spatial resolution UV monitoring is a valuable means to study activity in nearby LLAGNs.

Affiliated with

Also associated with

No associations

Rating

UV/Optical Nuclear Activity in the gE Galaxy NGC 1399 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with UV/Optical Nuclear Activity in the gE Galaxy NGC 1399, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and UV/Optical Nuclear Activity in the gE Galaxy NGC 1399 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-704178