Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/32911
DC Field | Value | Language |
---|---|---|
dc.contributor.author | PASQUATO, MARIO | en_US |
dc.contributor.author | DE LUCA, Andrea | en_US |
dc.contributor.author | RAIMONDO, Gabriella | en_US |
dc.contributor.author | CARINI, Roberta | en_US |
dc.contributor.author | Moraghan, Anthony | en_US |
dc.contributor.author | Chung, Chul | en_US |
dc.contributor.author | BROCATO, Enzo | en_US |
dc.contributor.author | Lee, Young-Wook | en_US |
dc.date.accessioned | 2023-01-18T10:34:54Z | - |
dc.date.available | 2023-01-18T10:34:54Z | - |
dc.date.issued | 2014 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32911 | - |
dc.description.abstract | Globular cluster (GC) color-magnitude diagrams (CMDs) are reasonably well understood in terms of standard stellar evolution. However, there are still some open issues, such as fully accounting for the horizontal branch (HB) morphology in terms of chemical and dynamical parameters. Mass loss on the red giant branch (RGB) shapes the mass distribution of the HB stars, and the color distribution in turn. The physical mechanisms driving mass loss are still unclear, as direct observations fail to reveal a clear correlation between mass-loss rate and stellar properties. The HB mass distribution is further complicated by helium-enhanced multiple stellar populations due to differences in the evolving mass along the HB. We present a simple analytical mass-loss model based on tidal stripping through Roche-Lobe overflow during stellar encounters. Our model naturally results in a non-Gaussian mass-loss distribution with high skewness and contains only two free parameters. We fit it to the HB mass distribution of four Galactic GCs, as obtained from fitting the CMD with zero age HB models. The best-fit model accurately reproduces the observed mass distribution. If confirmed on a wider sample of GCs, our results would account for the effects of dynamics in RGB mass-loss processes and provide a physically motivated procedure for synthetic CMDs of GCs. Our physical modeling of mass loss may result in the ability to disentangle the effects of dynamics and helium-enhanced multiple populations on the HB morphology and is instrumental in making HB morphology a probe of the dynamical state of GCs, leading to an improved understanding of their evolution. | en_US |
dc.language.iso | eng | en_US |
dc.title | Stellar Encounter Driven Red-giant Star Mass Loss in Globular Clusters | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1088/0004-637X/789/1/28 | en_US |
dc.identifier.scopus | 2-s2.0-84902595150 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.1088/0004-637X/789/1/28 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 789 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 28 | 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.identifier.adsbibcode | 2014ApJ...789...28P | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering | en_US |
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.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.openairetype | Article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | IASF Milano | - |
crisitem.author.dept | IASF Milano | - |
crisitem.author.dept | O.A. Abruzzo | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | O.A. Abruzzo | - |
crisitem.author.orcid | 0000-0003-3784-5245 | - |
crisitem.author.orcid | 0000-0001-6739-687X | - |
crisitem.author.orcid | 0000-0002-5577-7023 | - |
crisitem.author.orcid | 0000-0003-1604-2064 | - |
crisitem.author.orcid | 0000-0001-7988-8177 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Pasquato_2014_ApJ_789_28.pdf | PDF editoriale | 2.28 MB | Adobe PDF | View/Open |
Page view(s)
36
checked on Aug 31, 2024
Download(s)
246
checked on Aug 31, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.