{ "access": { "embargo": { "active": false, "reason": null }, "files": "public", "record": "public", "status": "open" }, "created": "2021-02-24T12:09:23.129498+00:00", "custom_fields": {}, "deletion_status": { "is_deleted": false, "status": "P" }, "files": { "count": 1, "enabled": true, "entries": { "Poster_CEMPs_v3.pdf": { "checksum": "md5:c24ac8b9f567b3e277a5cf6900baad72", "ext": "pdf", "id": "1bf46eb1-5020-4945-a3be-1f468a8c6359", "key": "Poster_CEMPs_v3.pdf", "metadata": null, "mimetype": "application/pdf", "size": 726099 } }, "order": [], "total_bytes": 726099 }, "id": "4559670", "is_draft": false, "is_published": true, "links": { "access": "https://zenodo.org/api/records/4559670/access", "access_links": "https://zenodo.org/api/records/4559670/access/links", "access_request": "https://zenodo.org/api/records/4559670/access/request", "access_users": "https://zenodo.org/api/records/4559670/access/users", "archive": "https://zenodo.org/api/records/4559670/files-archive", "archive_media": "https://zenodo.org/api/records/4559670/media-files-archive", "communities": "https://zenodo.org/api/records/4559670/communities", "communities-suggestions": "https://zenodo.org/api/records/4559670/communities-suggestions", "doi": "https://doi.org/10.5281/zenodo.4559670", "draft": "https://zenodo.org/api/records/4559670/draft", "files": "https://zenodo.org/api/records/4559670/files", "latest": "https://zenodo.org/api/records/4559670/versions/latest", "latest_html": "https://zenodo.org/records/4559670/latest", "media_files": "https://zenodo.org/api/records/4559670/media-files", "parent": "https://zenodo.org/api/records/4559669", "parent_doi": "https://zenodo.org/doi/10.5281/zenodo.4559669", "parent_html": "https://zenodo.org/records/4559669", "requests": "https://zenodo.org/api/records/4559670/requests", "reserve_doi": "https://zenodo.org/api/records/4559670/draft/pids/doi", "self": "https://zenodo.org/api/records/4559670", "self_doi": "https://zenodo.org/doi/10.5281/zenodo.4559670", "self_html": "https://zenodo.org/records/4559670", "self_iiif_manifest": "https://zenodo.org/api/iiif/record:4559670/manifest", "self_iiif_sequence": "https://zenodo.org/api/iiif/record:4559670/sequence/default", "versions": "https://zenodo.org/api/records/4559670/versions" }, "media_files": { "count": 0, "enabled": false, "entries": {}, "order": [], "total_bytes": 0 }, "metadata": { "creators": [ { "affiliations": [ { "name": "Instituto de Astrof\u00edsica e Ci\u00eancias do Espa\u00e7o (IA)" } ], "person_or_org": { "family_name": "Morgan Deal", "identifiers": [ { "identifier": "0000-0001-6774-3587", "scheme": "orcid" } ], "name": "Morgan Deal", "type": "personal" } }, { "affiliations": [ { "name": "Laboratoire Univers et Particules de Montpellier (LUPM)" } ], "person_or_org": { "family_name": "Olivier Richard", "name": "Olivier Richard", "type": "personal" } }, { "affiliations": [ { "name": "Institut de Recherche en Astrophysique et Plan\u00e9tologie (IRAP)" } ], "person_or_org": { "family_name": "Sylvie Vauclair", "name": "Sylvie Vauclair", "type": "personal" } } ], "description": "
The formation and evolution of light elements in the Universe act as important cosmological constraints. The oldest stars of the Galaxy have long been assumed to display in their outer layers the primordial lithium abundance, although all studies of stellar physics proved that this abundance must have decreased with time. The primordial Li abundance deduced from the observations of the Cosmological Background is indeed larger than the maximum one observed in these stars. Recent observations gave evidence of a large Li abundance dispersion in very metal poor stars.
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During this presentation, we address the general question of the lithium abundance dispersion obtained from observations of metal-poor stars, and how the interplay of atomic diffusion and accretion of matter modifies the element abundances in these metal-poor stars. In particular, we focus on the hydrodynamic processes that could take place after accretion. We consider initial metallicities from [Fe/H]=-2.31 down to [Fe/H]=-5.45.
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We show that the observations of lithium dispersion, associated or not with carbon enrichment, are well accounted for in terms of accretion onto the metal-poor stars, with accreted masses smaller than a few Jupiter masses, when using a lithium initial abundance in accordance with the primordial lithium abundance obtained from latest BBN results.
", "publication_date": "2021-02-24", "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": "Cool Stars on the main sequence" } ], "title": "Lithium abundance dispersion in metal-poor stars" }, "parent": { "access": { "owned_by": { "user": 52721 } }, "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": "4559669", "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.4559669", "provider": "datacite" } } }, "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.4559670", "provider": "datacite" }, "oai": { "identifier": "oai:zenodo.org:4559670", "provider": "oai" } }, "revision_id": 3, "stats": { "all_versions": { "data_volume": 47196435.0, "downloads": 65, "unique_downloads": 63, "unique_views": 86, "views": 92 }, "this_version": { "data_volume": 47196435.0, "downloads": 65, "unique_downloads": 63, "unique_views": 86, "views": 92 } }, "status": "published", "updated": "2021-02-24T14:07:16.843562+00:00", "versions": { "index": 1, "is_latest": true } }