Gas trapping in extremely massive clusters in NGC 1365
Abstract
Three radio cm sources in the central star-forming kpc of the closeby barred Seyfert galaxy NGC 1365 are observed. The complete dataset includes VLT infrared J, K, L and N images and spectra. The main observed features include (i) a rising dust continuum towards the mid-infrared (MIR), (ii) bright H emission lines and PAH (polycyclic aromatic hydrocarbon) features, (iii) a bright MIR [Neii] line, and (iv) no detection of MIR [Siv] or [Ariii] lines. For a typical cluster star-formation history and initial mass function, the [Ariii]/[Neii] and [Siv]/[Neii] ratios exhibit an abrupt decrease of several orders of magnitude at an age of ~ 7 Myr. The nondetection of [Ariii] and [Siv] indicates that the clusters are of approximately this age.
- Publication:
-
Star Clusters: Basic Galactic Building Blocks Throughout Time and Space
- Pub Date:
- January 2010
- DOI:
- 10.1017/S1743921309991475
- Bibcode:
- 2010IAUS..266..399G
- Keywords:
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- galaxies: starburst;
- galaxies: star clusters;
- infrared: galaxies