| Full text | |
| Author(s): |
Rodriguez-Merino, Lino H.
[1]
;
Mayya, Y. D.
[1]
;
Coelho, Paula R. T.
[2]
;
Bruzual, Gustavo
[3]
;
Charlot, Stephane
[4]
;
Carrasco, Esperanza
[1]
;
de Paz, Armando Gil
[5]
Total Authors: 7
|
| Affiliation: | [1] Inst Nacl Astrofis Opt & Electr, Luis Enrique Erro 1, Puebla 72840 - Mexico
[2] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, BR-05508090 Sao Paulo - Brazil
[3] Univ Nacl Autonoma Mexico, Inst Radioastron & Astrofis, Morelia 58090, Michoacan - Mexico
[4] Sorbonne Univ, CNRS, UMR7095, Inst Astrophys Paris, F-75014 Paris - France
[5] Univ Complutense Madrid, Dept Fis Tierra & Astrofis, Inst Fis Particulas & Cosmos IPARCOS, E-28040 Madrid - Spain
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Astrophysical Journal Letters; v. 889, n. 2 FEB 1 2020. |
| Web of Science Citations: | 0 |
| Abstract | |
The well-known age-metallicity-attenuation degeneracy does not permit unique and good estimates of basic parameters of stars and stellar populations. The effects of dust can be avoided using spectral line indices, but current methods have not been able to break the age-metallicity degeneracy. Here we show that using at least two new spectral line indices defined and measured on high-resolution (R = 6000) spectra of a signal-to-noise ratio (S/N) >= 10, one gets unambiguous estimates of the age and metallicity of intermediate to old stellar populations. Spectroscopic data retrieved with new astronomical facilities, e.g., X-shooter, MEGARA, and MOSAIC, can be employed to infer the physical parameters of the emitting source by means of spectral line index and index-index diagram analysis. (AU) | |
| FAPESP's process: | 18/05392-8 - A new library of fully theoretical stellar population models |
| Grantee: | Paula Rodrigues Teixeira Coelho |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 17/02375-2 - Theoretical vs semi-empirical stellar population models: a controlled experiment |
| Grantee: | Paula Rodrigues Teixeira Coelho |
| Support Opportunities: | Research Grants - Visiting Researcher Grant - International |