| Title | Carbon stars and C/M ratio in the WLM dwarf irregular galaxy |
| Authors | Valcheva, A. T.; Ivanov, V. D.; Ovcharov, E. P.; Nedialkov, P. L. |
| Bibcode | 2007A&A...466..501V Search ADS ↗ |
| Abstract | We identify the rich carbon star population of the Magellanic-type dwarf irregular galaxy WLM (Wolf-Lundmark-Melotte) and study its photometric properties from deep near-IR observations. The galaxy also exhibits a clear presence of oxygen-rich population. We derive a carbon to M-star ratio of C/M = 0.56±0.12, relatively high in comparison with many galaxies. The spatial distribution of the AGB stars in WLM hints at the presence of two stellar complexes with a size of a few hundred parsecs. Using the H I map of WLM and the derived gas-to-dust ratio for this galaxy N(H I)/E(B-V) = 60±10 [ 1021 at. cm-2 mag-1] we re-determined the distance modulus of WLM from the IR photometry of four known Cepheids, obtaining (m-M)0 = 24.84±0.14 mag. In addition, we determine the scale length of 0.75±0.14 kpc of WLM disk in the J-band. Full Table 1 is only available in electronic form at http://www.aanda.org |
| Objects | 7 Objects Search NED ↙ |
