Bibliographic Details
| Title: |
Red Supergiants as Cosmic Abundance Probes: The Sculptor Galaxy NGC 300 |
| Authors: |
Gazak, J. Zachary, Kudritzki, Rolf, Evans, Chris, Patrick, Lee, Davies, Ben, Bergemann, Maria, Plez, Bertrand, Bresolin, Fabio, Bender, Ralf, Wegner, Michael, Bonanos, Alceste Z., Williams, Stephen J. |
| Publication Year: |
2015 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - Astrophysics of Galaxies |
| More Details: |
We present a quantitative spectroscopic study of twenty-seven red supergiants in the Sculptor Galaxy NGC 300. J-band spectra were obtained using KMOS on the VLT and studied with state of the art synthetic spectra including NLTE corrections for the strongest diagnostic lines. We report a central metallicity of [Z]= -0.03 +/- 0.05 with a gradient of -0.083 +/- 0.014 [dex/kpc], in agreement with previous studies of blue supergiants and H II-region auroral line measurements. This result marks the first application of the J-band spectroscopic method to a population of individual red supergiant stars beyond the Local Group of galaxies and reveals the great potential of this technique.
Comment: 11 pages |
| Document Type: |
Working Paper |
| DOI: |
10.1088/0004-637X/805/2/182 |
| Access URL: |
http://arxiv.org/abs/1505.00871 |
| Accession Number: |
edsarx.1505.00871 |
| Database: |
arXiv |
