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Ephrem Nastasio", "name": "J. Ephrem Nastasio", "type": "personal" } }, { "affiliations": [ { "name": "Univesit\u00e0 di Padova" } ], "person_or_org": { "family_name": "Maria Vittoria Legnardi", "name": "Maria Vittoria Legnardi", "type": "personal" } } ], "description": "
Poster for the Cool stars 20.5 virtual conference.
\n\nAbstract:
\n\nThe amount of mass lost by stars during the red-giant branch (RGB) phase is one of the main parameters to correctly study later stages of stellar evolution. In spite of its importance, a fully-comprehensive understanding of this phenomenon is still missing and we mostly rely on empirical formulations. The Galactic Globular Clusters (GCs) are ideal targets to derive such formulations of mass loss, but the presence of multiple populations has been a major challenge.
\nWe combine Hubble Space Telescope photometry with stellar evolutionary models, to analyse the horizontal branch (HB) stars in 53 GCs. We constrained the helium abundance for the first and the “extreme” second generations stars using independent measurements based on the RGB. With these new constrains the parameters degeneracy traditionally associated to these stars has been broken for the first time.
Our main results are: the mass loss of first generation stars is tightly correlated with cluster metallicity; the location of helium enriched stars on the HB is reproduced only by adopting a higher RGB mass loss, compared to the first generation; and, finally, the difference in mass loss tightly correlates with helium enhancement and cluster mass.
\n\n", "funding": [ { "award": { "acronym": "GALFOR", "id": "00k4n6c32::716082", "identifiers": [ { "identifier": "https://cordis.europa.eu/projects/716082", "scheme": "url" } ], "number": "716082", "program": "H2020", "title": { "en": "The formation of the Galaxy: constraints from globular clusters" } }, "funder": { "id": "00k4n6c32", "name": "European Commission" } } ], "publication_date": "2021-02-26", "publisher": "Zenodo", "resource_type": { "id": "poster", "title": { "de": "Poster", "en": "Poster" } }, "rights": [ { "description": { "en": "The Creative Commons Attribution license allows re-distribution and re-use of a licensed work on the condition that the creator is appropriately credited." }, "icon": "cc-by-icon", "id": "cc-by-4.0", "props": { "scheme": "spdx", "url": "https://creativecommons.org/licenses/by/4.0/legalcode" }, "title": { "en": "Creative Commons Attribution 4.0 International" } } ], "subjects": [ { "subject": "Stars" }, { "subject": "Horizontal Branch" }, { "subject": "Globula clusters" } ], "title": "Mass-loss from multiple populations: hint of a universal mass loss-law for Pop II stars?" }, "parent": { "access": { "owned_by": { "user": 199610 } }, "communities": { "default": "3a36ebe6-61f3-417e-a308-74ef84ccb263", "entries": [ { "access": { "member_policy": "open", "members_visibility": "public", "record_policy": "open", "review_policy": "open", "visibility": "public" }, "children": { "allow": false }, "created": "2021-01-13T17:28:36.286355+00:00", "custom_fields": {}, "deletion_status": { "is_deleted": false, "status": "P" }, "id": "3a36ebe6-61f3-417e-a308-74ef84ccb263", "links": {}, "metadata": { "curation_policy": "
Contributions are accepted from participants that presented invited plenary session reviews, contributed plenary session talks, short "Haiku" talks and contributed posters. In addition, individual and collective contributions from (parallel) Topical Interest Rooms are welcome. If you would like to submit a typical conference proceeding, there are no formal page limits. For guidance we recommend you limit yourself to 4-8 pages for contributed talks and 10-15 pages for invited talks. Those wishing to submit a written conference proceeding are encouraged to format the document using the CS20 LaTeX template (available on https://github.com/CoolStars20/proceedings/releases/latest). All such submissions should be made as PDFs and will be reviewed for content by the SOC and we may suggest edits.
\r\n\r\nSubmission of presentation slides from speakers and full posters are also encouraged. PDF versions of these documents are the preferred format for Zenodo contributions to permit the documents to be previewed in a web browser. For maximum impact, a written contribution may be provided with presentation slides and/or a poster to provide greater context. Contributions will be checked for the proper metadata. Instructions about how to prepare your contribution are available on http://coolstars20.cfa.harvard.edu/contributions.html
\r\n", "description": "Proceedings from the Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, - Virtually Cool: hosted by Smithsonian Astrophysical Observatory Cambridge, Massachusetts from 2 \u2013 4 March 2021.", "page": "", "title": "The 20th (and a half) Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun" }, "revision_id": 0, "slug": "coolstars20half", "updated": "2021-03-01T20:54:17.302650+00:00" } ], "ids": [ "3a36ebe6-61f3-417e-a308-74ef84ccb263" ] }, "id": "4564645", "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.4564645", "provider": "datacite" } } }, "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.4567560", "provider": "datacite" }, "oai": { "identifier": "oai:zenodo.org:4567560", "provider": "oai" } }, "revision_id": 2, "stats": { "all_versions": { "data_volume": 95158674.0, "downloads": 85, "unique_downloads": 77, "unique_views": 107, "views": 128 }, "this_version": { "data_volume": 69409806.0, "downloads": 62, "unique_downloads": 60, "unique_views": 92, "views": 101 } }, "status": "published", "updated": "2021-02-27T00:27:15.939402+00:00", "versions": { "index": 2, "is_latest": true } }