A new empirical metallicity calibration for Vilnius photometry

Autor:	Bartasiute, S., Raudeliunas, S., Sperauskas, J.
Rok vydání:	2013
Předmět:	Astrophysics - Instrumentation and Methods for Astrophysics Astrophysics - Solar and Stellar Astrophysics
Zdroj:	Baltic Astronomy, vol. 22, 2013, p. 273-296
Druh dokumentu:	Working Paper
DOI:	10.1515/astro-2017-0160
Popis:	We present a new calibration of the seven-color Vilnius system in terms of [Fe/H], applicable to F-M stars in the metallicity range -2.8<[Fe/H]<+0.5. We employ a purely empirical approach, based on ~1000 calibrating stars with high-resolution spectroscopic abundance determinations. It is shown that the color index P-Y is the best choice for a most accurate and sensitive abundance indicator for both dwarf and giant stars. Using it, [Fe/H] values can be determined with an accuracy of $\pm$0.12 dex for stars of solar and mildly sub-solar metallicity and $\pm$0.17 dex for stars with [Fe/H]<-1. The new calibration is a significant improvement over the previous one used to date. Comment: Accepted for publication
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1312.1884 Zobrazit plný text záznamu View this record from Arxiv