The GALAH survey: Chemical homogeneity of the Orion complex

dc.contributor.authorKos, Janez
dc.contributor.authorBland-Hawthorn, Joss
dc.contributor.authorBuder, Sven
dc.contributor.authorNordlander, Thomas
dc.contributor.authorSpina, L.
dc.contributor.authorBeeson, Kevin
dc.contributor.authorLind, Karin
dc.contributor.authorAsplund, Martin
dc.contributor.authorFreeman, Kenneth
dc.contributor.authorHayden, Michael
dc.contributor.authorLewis, Geraint
dc.contributor.authorMartell, Sarah
dc.contributor.authorSharma, Sanjib
dc.contributor.authorTing, Yuan-Sen
dc.date.accessioned2023-01-19T01:15:39Z
dc.date.available2023-01-19T01:15:39Z
dc.date.issued2021
dc.date.updated2021-11-28T07:37:02Z
dc.description.abstractDue to its proximity, the Orion star forming region is often used as a proxy to study processes related to star formation and to observe young stars in the environment they were born in. With the release of Gaia DR2, the distance measurements to the Orion complex are now good enough that the 3D structure of the complex can be explored. Here we test the hypothesis that, due to non-trivial structure and dynamics, and age spread in the Orion complex, the chemical enrichment of youngest stars by early core-collapse supernovae can be observed. We obtained spectra of 794 stars of the Orion complex with the HERMES spectrograph at the Anglo Australian telescope as a part of the GALAH and GALAH-related surveys. We use the spectra of ~300 stars to derive precise atmospheric parameters and chemical abundances of 25 elements for 15 stellar clusters in the Orion complex. We demonstrate that the Orion complex is chemically homogeneous and that there was no self-pollution of young clusters by core-collapse supernovae from older clusters; with a precision of 0.02 dex in relative alpha-elements abundance and 0.06 dex in oxygen abundance we would have been able to detect pollution from a single supernova, given a fortunate location of the SN and favourable conditions for ISM mixing. We estimate that the supernova rate in the Orion complex was very low, possibly producing no supernova by the time the youngest stars of the observed population formed (from around 21 to 8 Myr ago).en_AU
dc.description.sponsorshipFunding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.issn0035-8711en_AU
dc.identifier.urihttp://hdl.handle.net/1885/283845
dc.language.isoen_AUen_AU
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/24618/..."published version can be archived in institutional repository" from Sherpa/Romeo site as at 19/01/2023en_AU
dc.publisherBlackwell Publishing Ltden_AU
dc.rights© 2021 The authorsen_AU
dc.sourceMonthly Notices of the Royal Astronomical Societyen_AU
dc.subjectastrochemistryen_AU
dc.subjectstars: abundancesen_AU
dc.subjectstars: formationen_AU
dc.subjectopen clusters and associations :generalen_AU
dc.titleThe GALAH survey: Chemical homogeneity of the Orion complexen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
local.bibliographicCitation.issue3en_AU
local.bibliographicCitation.lastpage4250en_AU
local.bibliographicCitation.startpage4232en_AU
local.contributor.affiliationKos, Janez, The University of Sydneyen_AU
local.contributor.affiliationBland-Hawthorn, Joss, University of Sydneyen_AU
local.contributor.affiliationBuder, Sven, College of Science, ANUen_AU
local.contributor.affiliationNordlander, Thomas, College of Science, ANUen_AU
local.contributor.affiliationSpina, L, INAFen_AU
local.contributor.affiliationBeeson, Kevin, University of Ljubljanaen_AU
local.contributor.affiliationLind, Karin, Uppsala Universityen_AU
local.contributor.affiliationAsplund, Martin, Max Planck Institute for Astrophysicsen_AU
local.contributor.affiliationFreeman, Kenneth, College of Science, ANUen_AU
local.contributor.affiliationHayden, Michael, University of Sydneyen_AU
local.contributor.affiliationLewis, Geraint, University of Sydneyen_AU
local.contributor.affiliationMartell, Sarah, University of New South Walesen_AU
local.contributor.affiliationSharma, Sanjib, University of Sydneyen_AU
local.contributor.affiliationTing, Yuan-Sen, College of Science, ANUen_AU
local.contributor.authoremailu7000399@anu.edu.auen_AU
local.contributor.authoruidBuder, Sven, u1054434en_AU
local.contributor.authoruidNordlander, Thomas, u1019177en_AU
local.contributor.authoruidFreeman, Kenneth, u7000399en_AU
local.contributor.authoruidTing, Yuan-Sen, u5043815en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor510109 - Stellar astronomy and planetary systemsen_AU
local.identifier.absfor510106 - High energy astrophysics and galactic cosmic raysen_AU
local.identifier.absfor510199 - Astronomical sciences not elsewhere classifieden_AU
local.identifier.absseo280120 - Expanding knowledge in the physical sciencesen_AU
local.identifier.ariespublicationU6645980xPUB47en_AU
local.identifier.citationvolume506en_AU
local.identifier.doi10.1093/mnras/stab1767en_AU
local.identifier.uidSubmittedByU6645980en_AU
local.publisher.urlhttps://academic.oup.com/en_AU
local.type.statusPublished Versionen_AU

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