Young globular clusters in NGC1316
We present multi-object spectroscopy of the inner zone of the globular cluster (GC) system associated with the intermediate-age merger remnant NGC1316. Using the multi-object mode of the GMOS camera, we obtained spectra for 35 GCs. We find pieces of evidence that the innermost GCs of NGC1316 rotate...
Guardado en:
| Autores principales: | , , , , |
|---|---|
| Formato: | Articulo Preprint |
| Lenguaje: | Inglés |
| Publicado: |
2018
|
| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/93869 https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/sty1416/5025664 |
| Aporte de: |
| id |
I19-R120-10915-93869 |
|---|---|
| record_format |
dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Astronomía galaxies: elliptical galaxies: star clusters galaxies: haloes |
| spellingShingle |
Astronomía galaxies: elliptical galaxies: star clusters galaxies: haloes Sesto, Leandro Alberto Faifer, Favio Raúl Smith Castelli, Analía Viviana Forte, Juan Carlos Escudero, Carlos Gabriel Young globular clusters in NGC1316 |
| topic_facet |
Astronomía galaxies: elliptical galaxies: star clusters galaxies: haloes |
| description |
We present multi-object spectroscopy of the inner zone of the globular cluster (GC) system associated with the intermediate-age merger remnant NGC1316. Using the multi-object mode of the GMOS camera, we obtained spectra for 35 GCs. We find pieces of evidence that the innermost GCs of NGC1316 rotate almost perpendicular to the stellar component of the galaxy. In a second stage, we determined ages, metallicities, and α-element abundances for each GC present in the sample, through the measurement of different Lick/IDS indices and their comparison with simple stellar populationmodels.We confirmed the existence of multiple GC populations associated with NGC1316, where the presence of a dominant subpopulation of very young GCs, with an average age of 2.1 Gyr, metallicities between -0.5 < [Z/H] < 0.5 dex, and α-element abundances in the range -0.2 < [α/Fe] < 0.3 dex, stands out. Several objects in our sample present subsolar values of [α/Fe] and a large spread of [Z/H] and ages. Some of these objects could actually be stripped nuclei, possibly accreted duringminor merger events. Finally, the results have been analysed with the aim of describing the different episodes of star formation and thus provide a more complete picture about the evolutionary history of the galaxy. We conclude that these pieces of evidence could indicate that this galaxy has cannibalized one or more gas-rich galaxies, where the last fusion event occurred about 2 Gyr ago. |
| format |
Articulo Preprint |
| author |
Sesto, Leandro Alberto Faifer, Favio Raúl Smith Castelli, Analía Viviana Forte, Juan Carlos Escudero, Carlos Gabriel |
| author_facet |
Sesto, Leandro Alberto Faifer, Favio Raúl Smith Castelli, Analía Viviana Forte, Juan Carlos Escudero, Carlos Gabriel |
| author_sort |
Sesto, Leandro Alberto |
| title |
Young globular clusters in NGC1316 |
| title_short |
Young globular clusters in NGC1316 |
| title_full |
Young globular clusters in NGC1316 |
| title_fullStr |
Young globular clusters in NGC1316 |
| title_full_unstemmed |
Young globular clusters in NGC1316 |
| title_sort |
young globular clusters in ngc1316 |
| publishDate |
2018 |
| url |
http://sedici.unlp.edu.ar/handle/10915/93869 https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/sty1416/5025664 |
| work_keys_str_mv |
AT sestoleandroalberto youngglobularclustersinngc1316 AT faiferfavioraul youngglobularclustersinngc1316 AT smithcastellianaliaviviana youngglobularclustersinngc1316 AT fortejuancarlos youngglobularclustersinngc1316 AT escuderocarlosgabriel youngglobularclustersinngc1316 |
| bdutipo_str |
Repositorios |
| _version_ |
1764820491873288193 |