Combining asteroseismology and spectroscopy for obtaining precise abundances: CoRoT-GES and K2-RAVE

Autor:	CoRoT-GES, M. Valentini, K Rave collaborations
Rok vydání:	2017
Předmět:	Physics Space and Planetary Science Astronomy Astronomy and Astrophysics Spectroscopy Asteroseismology
Zdroj:	Proceedings of the International Astronomical Union. 13:162-165
ISSN:	1743-9221 1743-9213
Popis:	The spectroscopic analysis of red giant stars is hampered by difficulties in determining the surface gravity, log g. The presence of degeneracies, few lines sensitive to log g, limited spectral coverage and bad signal-to-noise, can affect the precision and accuracy of log g and, as a consequence, the quality of the element abundances. We show how the adoption of the seismic surface gravity can improve the spectroscopic analysis of red giants. As examples, we adopted the seismic gravity in the analysis of spectra taken by two different surveys: GES (high resolution) and RAVE (intermediate resolution). The results of this technique were the lifting of the log g-Teff degeneracy and more accurate and precise atmospheric parameters and abundances.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7df948d59e2a401e5ae1b3364ae2a926 https://doi.org/10.1017/s1743921317009371 Zobrazit plný text záznamu Plný text ve formátu PDF