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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Integrated Spectra of Milky Way Globular Clusters

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Author(s):
Moura, T. C. [1] ; Trevisan, M. [2] ; Barbuy, B. [1] ; Rossi, S. [1]
Total Authors: 4
Affiliation:
[1] Univ Sao Paulo, IAG, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil
[2] Univ Fed Rio Grande do Sul, Dept Astron, CP 15051, BR-91501970 Porto Alegre, RS - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ASTROPHYSICAL JOURNAL; v. 885, n. 1 NOV 1 2019.
Web of Science Citations: 0
Abstract

Integrated spectra of Milky Way globular clusters (GCs) are reproduced by computing synthetic spectra taking into account individual element abundances. Five clusters were selected from their location in the Galactic bulge, for which integrated spectra were available in the WiFeS Atlas of Galactic Globular Cluster Spectra project. Our aim is to further study the oldest GCs located in the Galactic bulge, with a metallicity in the range ?1.6 \& xfffd;< {[}Fe/H]\& xfffd;<\& xfffd;?0.7. We also include the halo cluster NGC 6752 for comparison purposes. We reproduce the full spectra in the range 4500?9000 ? available in these observed spectra, as well as individual lines of Na, Mg, Al, Si, Ca, Ti, Ba, and Eu. We report a list of lines that are suitable for abundance derivation, and by adopting these abundances, we are able to fit the damping parameters that define the wings of strong lines of well-known triplets of Mg i and Ca ii. Finally, the effect of multiple stellar populations through enhanced Na abundances is tested. (AU)

FAPESP's process: 18/03480-7 - Modeling integrated spectra of globular clusters and galaxies
Grantee:Tatiana Coelho de Moura Bastos
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 14/18100-4 - Stellar populations in the Milky Way: bulge, halo, disk and star forming regions; instrumentation for high resolution spectroscopy
Grantee:Beatriz Leonor Silveira Barbuy
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 15/50374-0 - Mosaic: the multi-object spectrograph for the ESO Extremely Large Telescope
Grantee:Silvia Cristina Fernandes Rossi
Support Opportunities: Research Projects - Thematic Grants