Chemical Analysis of the Brightest Star of the Cetus II Ultrafaint Dwarf Galaxy Candidate
dc.date.accessioned | 2024-01-30T18:11:53Z | |
dc.date.available | 2024-01-30T18:11:53Z | |
dc.date.created | 2024-01-15T08:53:22Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | Webber, K.B. Hansen, T.T. Marshall, J.L. Simon, J.D. Pace, A.B. Mutlu-Pakdil, B. Drlica-Wagner, A. Martínez-Vázquez, C.E. Aguena, M. Allam, S.S. Alves, O. Bertin, E. Brooks, D. Carnero Rosell, A. Carretero, J. da Costa, L.N. De Vicente, J. Doel, P. Ferrero, Ismael Friedel, D. Frieman, J. García-Bellido, J. Giannini, G. Gruen, D. Gruendl, R.A. Hinton, S.R. Hollowood, D.L. Honscheid, K. Kuehn, K. Mena-Fernández, J. Menanteau, F. Miquel, R. Ogando, R.L.C. Pereira, M.E.S. Pieres, A. Plazas Malagón, A.A. Sanchez, E. Santiago, B. Smith, J. Allyn Smith, M. Suchyta, E. Tarle, G. To, C. Weaverdyck, N. Yanny, B. . Chemical Analysis of the Brightest Star of the Cetus II Ultrafaint Dwarf Galaxy Candidate. The Astrophysical Journal (ApJ). 2023, 959(2) | |
dc.identifier.uri | http://hdl.handle.net/10852/107286 | |
dc.description.abstract | Abstract We present a detailed chemical abundance analysis of the brightest star in the ultrafaint dwarf (UFD) galaxy candidate Cetus II from high-resolution Magellan/MIKE spectra. For this star, DES J011740.53-173053, abundances or upper limits of 18 elements from carbon to europium are derived. Its chemical abundances generally follow those of other UFD galaxy stars, with a slight enhancement of the α -elements (Mg, Si, and Ca) and low neutron-capture element (Sr, Ba, and Eu) abundances supporting the classification of Cetus II as a likely UFD. The star exhibits lower Sc, Ti, and V abundances than Milky Way (MW) halo stars with similar metallicity. This signature is consistent with yields from a supernova originating from a star with a mass of ∼11.2 M ⊙ . In addition, the star has a potassium abundance of [K/Fe] = 0.81, which is somewhat higher than the K abundances of MW halo stars with similar metallicity, a signature that is also present in a number of UFD galaxies. A comparison including globular clusters and stellar stream stars suggests that high K is a specific characteristic of some UFD galaxy stars and can thus be used to help classify objects as UFD galaxies. | |
dc.language | EN | |
dc.rights | Attribution 4.0 International | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.title | Chemical Analysis of the Brightest Star of the Cetus II Ultrafaint Dwarf Galaxy Candidate | |
dc.title.alternative | ENEngelskEnglishChemical Analysis of the Brightest Star of the Cetus II Ultrafaint Dwarf Galaxy Candidate | |
dc.type | Journal article | |
dc.creator.author | Webber, K.B. | |
dc.creator.author | Hansen, T.T. | |
dc.creator.author | Marshall, J.L. | |
dc.creator.author | Simon, J.D. | |
dc.creator.author | Pace, A.B. | |
dc.creator.author | Mutlu-Pakdil, B. | |
dc.creator.author | Drlica-Wagner, A. | |
dc.creator.author | Martínez-Vázquez, C.E. | |
dc.creator.author | Aguena, M. | |
dc.creator.author | Allam, S.S. | |
dc.creator.author | Alves, O. | |
dc.creator.author | Bertin, E. | |
dc.creator.author | Brooks, D. | |
dc.creator.author | Carnero Rosell, A. | |
dc.creator.author | Carretero, J. | |
dc.creator.author | da Costa, L.N. | |
dc.creator.author | De Vicente, J. | |
dc.creator.author | Doel, P. | |
dc.creator.author | Ferrero, Ismael | |
dc.creator.author | Friedel, D. | |
dc.creator.author | Frieman, J. | |
dc.creator.author | García-Bellido, J. | |
dc.creator.author | Giannini, G. | |
dc.creator.author | Gruen, D. | |
dc.creator.author | Gruendl, R.A. | |
dc.creator.author | Hinton, S.R. | |
dc.creator.author | Hollowood, D.L. | |
dc.creator.author | Honscheid, K. | |
dc.creator.author | Kuehn, K. | |
dc.creator.author | Mena-Fernández, J. | |
dc.creator.author | Menanteau, F. | |
dc.creator.author | Miquel, R. | |
dc.creator.author | Ogando, R.L.C. | |
dc.creator.author | Pereira, M.E.S. | |
dc.creator.author | Pieres, A. | |
dc.creator.author | Plazas Malagón, A.A. | |
dc.creator.author | Sanchez, E. | |
dc.creator.author | Santiago, B. | |
dc.creator.author | Smith, J. Allyn | |
dc.creator.author | Smith, M. | |
dc.creator.author | Suchyta, E. | |
dc.creator.author | Tarle, G. | |
dc.creator.author | To, C. | |
dc.creator.author | Weaverdyck, N. | |
dc.creator.author | Yanny, B. | |
cristin.unitcode | 185,15,3,0 | |
cristin.unitname | Institutt for teoretisk astrofysikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.cristin | 2226242 | |
dc.identifier.bibliographiccitation | info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Astrophysical Journal (ApJ)&rft.volume=959&rft.spage=&rft.date=2023 | |
dc.identifier.jtitle | The Astrophysical Journal (ApJ) | |
dc.identifier.volume | 959 | |
dc.identifier.issue | 2 | |
dc.identifier.pagecount | 11 | |
dc.identifier.doi | https://doi.org/10.3847/1538-4357/ad0385 | |
dc.subject.nvi | VDP::Astrofysikk, astronomi: 438 | |
dc.type.document | Tidsskriftartikkel | |
dc.type.peerreviewed | Peer reviewed | |
dc.source.issn | 0004-637X | |
dc.type.version | PublishedVersion | |
cristin.articleid | 141 | |
dc.relation.project | NFR/287772 |
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