Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-01-18
Mon.Not.Roy.Astron.Soc.Lett. 368 (2006) L10-L14
Astronomy and Astrophysics
Astrophysics
5 pages, incl. 2 figures. Accepted for publication in MNRAS Letters. The definitive version will be available at http://www.bl
Scientific paper
10.1111/j.1745-3933.2006.00148.x
Using the NIRSPEC spectrograph at Keck II, we have obtained H and K-band echelle spectra for a young (10-15 Myr), luminous (MV=-13.2) super-star cluster in the nearby spiral galaxy NGC 6946. From spectral synthesis and equivalent width measurements we obtain for the first time accurate abundances and abundance patterns in an extragalactic super-star cluster. We find [Fe/H]=-0.45+/-0.08 dex, an average alpha-enhancement of +0.22+/-0.1 dex, and a relatively low 12C/13C~ 8+/-2 isotopic ratio. We also measure a velocity dispersion of ~9.1 km/s, in agreement with previous estimates. We conclude that integrated high-dispersion spectroscopy of massive star clusters is a promising alternative to other methods for abundance analysis in extragalactic young stellar populations.
Brodie Jean P.
Gallagher Jay S.
Larsen Soeren S.
Origlia Livia
No associations
LandOfFree
Near-IR Spectroscopy of a Young Super-Star Cluster in NGC 6946: Chemical Abundances and Abundance Patterns 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 Near-IR Spectroscopy of a Young Super-Star Cluster in NGC 6946: Chemical Abundances and Abundance Patterns, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Near-IR Spectroscopy of a Young Super-Star Cluster in NGC 6946: Chemical Abundances and Abundance Patterns will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-593862