Other
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aps..oss.p1008g&link_type=abstract
American Physical Society, 2009 Joint Spring Meeting of the Ohio Sections of the APS and AAPT, April 24-25, 2009, abstract #P1.0
Other
Scientific paper
We present imaging and spectroscopy from ground and space-based observations of NGC 2976. This Sc galaxy has a small bulge and close proximity (only 3.6 Mpc) making it ideal for our search for small nuclear black holes (BH). Pre-existing information do not show it to have an AGN: ROSAT X-ray data do not show a nuclear point source, and it emits no radio jets. We confirm that N2976 has an HII type nuclear spectrum, consistent with intense star formation. Keck spectra reveal a stellar velocity dispersion of only σ= 18-20 km s-1. The gas velocity dispersion is also about 20 km s-1. HST imaging reveals an unusual nuclear double peak whose dominance flips going from the medium band (F547M) image to the narrow band (Hα) image. The emission line spectra do not show a regular rotation curve, despite an almost disk-like appearance of the extended Hα emission. The MBH- σ relation predicts a BH mass of only 5x10^4 M. The virial theorem applied to the central gas blob gives a considerably larger upper limit (˜10^6 M). This appears to be another ``nucleus in formation", and may not have a supermassive BH at all, like M33.
Gallagher John Jay
Pinkney Jason
No associations
LandOfFree
Gas and Stellar kinematics of late type spiral NGC 2976 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 Gas and Stellar kinematics of late type spiral NGC 2976, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas and Stellar kinematics of late type spiral NGC 2976 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1861663