Spectroscopic investigation of SDSS J100921.40+375233.9 selected from SDSS and GALEX photometry
Timur Sahin, David L. Lambert, Carlos Allende Prieto
TL;DR
This paper presents a spectroscopic analysis of SDSS J100921.40+375233.9, a star suspected of extremely low metallicity, revealing its physical parameters and likely thick disk membership.
Contribution
It provides high-resolution spectroscopic data and detailed abundance analysis of a star selected from SDSS and GALEX photometry, clarifying its nature.
Findings
Star has Teff = 5820 K
Star's surface gravity log g = 3.9
Star is consistent with thick disk membership
Abstract
In this study, we aim to reveal the nature of the Sloan Digital Sky Survey (SDSS) star: SDSS J100921.40+375233.9, suspected to have an extremely low metallicity. We observed this star at high spectral resolution and performed an abundance analysis. We derived the spectroscopic parameters Teff =5820+-125 K, log g = 3.9+-0.2, and xi = 1.1+-0.5 km/s. The star is consistent with belonging to the thick disk.
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Taxonomy
TopicsStellar, planetary, and galactic studies