The central region of NGC 3077: ground-based photometry and age of bright `starlike' objects
Abstract
We present UBVI_C photometry of starlike objects in the central region of NGC 3077. The colour-colour and colour-magnitude diagrams of the objects are discussed. Many of the objects under consideration, starlike from the ground, are probably dense young star clusters (super star clusters, SSC). Ages spreading over ∼4 to ∼150 Myr are estimated for most of these objects. Sakai and Madore (2001) found enhanced star formation ∼30-125 Myr ago also in the halo of this galaxy; thus, high star forming activity has occurred within the entire galaxy (centre and halo) since ∼130..150 Myr. Having ended in the outer regions about 30 Myr ago, it is going on near the centre with full vigour.
- Publication:
-
Astronomische Nachrichten
- Pub Date:
- May 2004
- DOI:
- 10.1002/asna.200310175
- Bibcode:
- 2004AN....325..307N
- Keywords:
-
- galaxies: dwarf (NGC 3077);
- galaxies: stellar photometry;
- galaxies: stellar content