Nuclear Molecular Gas Bar Perpendicular to the Stellar Bar in NGC 3351
Abstract
New interferometric observations of the molecular gas within the early type barred spiral galaxy NGC 3351 (M95) have revealed a nuclear molecular gas bar 1 kpc long, that is aligned perpendicular to the large scale stellar bar. The mass of gas associated with the nuclear molecular gas bar is ~1.8 X 10^8^M_sun_ representing ~25% of the total molecular gas mass. NGC 3351 is associated with other distinguishing morphological characteristics including a nuclear ring of H II regions, which brought NGC 3351 early notoriety as a "hotspot nucleus," and a much larger ring of H II regions that encircles the stellar bar. Collectively, the distinctive morphology of the neutral and ionized medium within NGC 3351 can be understood in terms of resonances associated with a stellar bar pattern rotating at a angular velocity of ~60 km/s kpc^-1^
- Publication:
-
The Astronomical Journal
- Pub Date:
- March 1992
- DOI:
- 10.1086/116100
- Bibcode:
- 1992AJ....103..784D
- Keywords:
-
- Globular Clusters;
- Interstellar Gas;
- Molecular Gases;
- Novae;
- Spiral Galaxies;
- Carbon Monoxide;
- H Ii Regions;
- Ionized Gases;
- Star Formation;
- Astrophysics;
- GALAXIES: KINEMATICS AND DYNAMICS;
- GALAXIES: SPIRAL;
- GALAXIES: INDIVIDUAL: NGC 3351