Studies of the broad 22-micron feature
Abstract
Recently a broad 22 um feature has been observed in H II regions and starburst galaxies. We are planing further studies of this feature and its relationship with starburst galaxies. Supernovae are very likely the major production source of this broad 22 um dust feature and the strength of the feature can be used to trace the supernova rate in a galaxy. We plan to use the IRS to observe a sample of galaxies with different degree of starburst activities, with the goal of studying the strength of the 22 um feature strength and its relationship to starburst activity. In addition, we also plan to map the Carina Nebula where the 22 um feature was previously observed, with the goal of studying the excitation mechanism of this feature and the identification of its carrier. Finally, we will also observe the 22 micron feature in two supernova remnants.
- Publication:
-
Spitzer Proposal
- Pub Date:
- September 2004
- Bibcode:
- 2004sptz.prop...24R