Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004mnras.353.1293m&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 353, Issue 4, pp. 1293-1303.
Astronomy and Astrophysics
Astronomy
13
Hii Regions, Supernova Remnants, Galaxies: Dwarf, Galaxies: Individual: Fcc032, Galaxies: Individual: Fcc206, Galaxies: Individual: Fccb729
Scientific paper
We present R-band and Hα+[NII] narrow-band imaging of FCC032, FCC206 and FCCB729, three dwarf elliptical galaxies (dEs) in the Fornax cluster. These dEs contain significant amounts of ionized gas. FCC032 harbours a large ionized gas complex, consisting of several individual clouds, a superbubble and a filament that extends away from the galaxy centre. The ionized gas structures observed in FCC032 bear a strong resemblance to those observed in more gas-rich and more fiercely star-forming dwarf galaxies. FCC206, a very low surface brightness dE, contains one faint extended emission region and two compact clouds. In FCCB729, the only nucleated galaxy in this sample, one of the ionized gas clouds coincides with the stellar nucleus. We derive ionized gas masses of a few 102 to 103 Msolar for these galaxies.
This brings our sample of dEs with ionized gas with Hα+[NII] narrow-band imaging to five objects. The ionized gas morphologies in these galaxies range from pure nuclear emission peaks to extended emission complexes. This morphological diversity could also indicate a diversity in ionizing processes in dEs with a warm interstellar medium (active galactic nuclei, starbursts, post-asymptotic giant branch stars, etc.).
Inside FCC206, four star clusters appear to be on the verge of merging to form a nucleus in this presently non-nucleated dE. Understanding the formation of nuclei in dEs could give us important clues to the formation of supermassive black holes (SMBHs).
de Rijcke Sven
Dejonghe Herwig
Michielsen Dolf
Prugniel Philippe
Roberts Sam
No associations
LandOfFree
Evidence for a warm interstellar medium in Fornax dwarf elliptical galaxies - II. FCC032, FCC206 and FCCB729 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 Evidence for a warm interstellar medium in Fornax dwarf elliptical galaxies - II. FCC032, FCC206 and FCCB729, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for a warm interstellar medium in Fornax dwarf elliptical galaxies - II. FCC032, FCC206 and FCCB729 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1814838