Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/34390
DC Field | Value | Language |
---|---|---|
dc.contributor.author | MARINO, Anna | en_US |
dc.contributor.author | Milone, A. P. | en_US |
dc.contributor.author | Renzini, A. | en_US |
dc.contributor.author | Yong, D. | en_US |
dc.contributor.author | Asplund, M. | en_US |
dc.contributor.author | Da Costa, G. S. | en_US |
dc.contributor.author | Jerjen, H. | en_US |
dc.contributor.author | Cordoni, G. | en_US |
dc.contributor.author | Carlos,M. | en_US |
dc.contributor.author | Dondoglio, E. | en_US |
dc.contributor.author | Lagioia, E. P. | en_US |
dc.contributor.author | Jang, S. | en_US |
dc.contributor.author | Tailo, M. | en_US |
dc.date.accessioned | 2023-09-13T14:06:01Z | - |
dc.date.available | 2023-09-13T14:06:01Z | - |
dc.date.issued | 2021 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/34390 | - |
dc.description.abstract | Recent work has revealed two classes of Globular Clusters (GCs), dubbed Type-I and Type-II. Type-II GCs are characterized by a blue- and a red- red giant branch composed of stars with different metallicities, often coupled with distinct abundances in the slow-neutron capture elements (s-elements). Here we continue the chemical tagging of Type-II GCs by adding the two least-massive clusters of this class, NGC1261 and NGC6934. Based on both spectroscopy and photometry, we find that red stars in NGC1261 are slightly enhanced in [Fe/H] by ~0.1 dex and confirm that red stars of NGC 6934 are enhanced in iron by ~0.2 dex. Neither NGC1261 nor NGC6934 show internal variations in the s-elements, which suggests a GC mass threshold for the occurrence of s-process enrichment. We found a significant correlation between the additional Fe locked in the red stars of Type-II GCs and the present-day mass of the cluster. Nevertheless, most Type II GCs retained a small fraction of Fe produced by SNe II, lower than the 2%; NGC6273, M54 and omega Centauri are remarkable exceptions. In the appendix, we infer for the first time chemical abundances of Lanthanum, assumed as representative of the s-elements, in M54, the GC located in the nucleus of the Sagittarius dwarf galaxy. Red-sequence stars are marginally enhanced in [La/Fe] by 0.10\pm0.06 dex, in contrast with the large [La/Fe] spread of most Type II GCs. We suggest that different processes are responsible for the enrichment in iron and s-elements in Type-II GCs. | en_US |
dc.language.iso | eng | en_US |
dc.title | Spectroscopy and photometry of the least-massive Type-II globular clusters: NGC1261 AND NGC6934 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/ac282c | en_US |
dc.identifier.scopus | 2-s2.0-85121785832 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/ac282c | en_US |
dc.identifier.url | http://arxiv.org/abs/2106.15978v1 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 923 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 22 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.orcid | 0000-0002-1276-5487 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Marino_2021_ApJ_923_22.pdf | PDF editoriale | 1.96 MB | Adobe PDF | View/Open |
Page view(s)
13
checked on Aug 4, 2024
Download(s)
7
checked on Aug 4, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.