| Autor: |
Buzzoni, A., Patelli, L., Bellazzini, M., Pecci, F. Fusi, Oliva, E. |
| Rok vydání: |
2010 |
| Předmět: |
|
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1111/j.1365-2966.2009.16223.x |
| Popis: |
We have investigated the relevant trend of the bolometric correction (BC) at the cool-temperature regime of red giant stars and its possible dependence on stellar metallicity. Our analysis relies on a wide sample of optical-infrared spectroscopic observations, along the 3500A-2.5micron wavelength range, for a grid of 92 red giant stars in five (3 globular + 2 open) Galactic clusters, along the -2.2<[Fe/H]<+0.4 metallicity range. Bolometric magnitudes have been found within an internal accuracy of a few percent. Making use of our new database, we provide a set of fitting functions for the V and K BC vs. Teff and broad-band colors, valid over the interval 3300KComment: 18 pages with 12 color figures and 12 tables. To appear in the MNRAS. Full spectral catalog of stars available at http://www.bo.astro.it/~eps/home.html |
| Databáze: |
arXiv |
| Externí odkaz: |
|
