Spectrometric composition of nearby K dwarfs

Autor:	Jianrong Shi, Gang Zhao, E. Kotoneva, Yuan Liu
Rok vydání:	2006
Předmět:	Physics Stars Space and Planetary Science Metallicity Ionization Northern Hemisphere Brown dwarf Astronomy Astronomy and Astrophysics Astrophysics Stellar classification Abundance of the chemical elements Galaxy
Zdroj:	Astronomy & Astrophysics. 454:833-838
ISSN:	1432-0746 0004-6361
DOI:	10.1051/0004-6361:20042498
Popis:	We have obtained relatively high resolution spectra of Northern hemisphere K dwarfs. This is the first spectrometric project dedicated only to K dwarfs. Earlier studies have concentrated on more massive F and G dwarfs. However, these stars have already undergone evolutionary effects, unlike K dwarfs, which offer more accurate information about the evolution of the Solar neighbourhood. We have determined the LTE abundances of 14 elements for 42 stars with initial metallicity range covered by −1.52 < [Fe/H] < 0.48. We confirm the discrepancy in the abundances derived from neutral and ionized lines. The solution to this problem cannot just be the modification of initial physical parameters, but requires fundamental changes in the modeling of K dwarfs.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a87bd986b972f204423820402b1c057e https://doi.org/10.1051/0004-6361:20042498 Zobrazit plný text záznamu