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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003658naa a2200565 4500
001oai:DiVA.org:su-153893
003SwePub
008180307s2018 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1538932 URI
0247 a https://doi.org/10.1093/mnras/stx25562 DOI
040 a (SwePub)su
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Martocchia, S.4 aut
2451 0a Age as a major factor in the onset of multiple populations in stellar clusters
264 c 2017-10-02
264 1b Oxford University Press (OUP),c 2018
338 a print2 rdacarrier
520 a It is now well established that globular clusters (GCs) exhibit star-to-star light-element abundance variations (known as multiple populations, MPs). Such chemical anomalies have been found in (nearly) all the ancient GCs (more than 10 Gyr old) of our Galaxy and its close companions, but so far no model for the origin of MPs is able to reproduce all the relevant observations. To gain new insights into this phenomenon, we have undertaken a photometric Hubble Space Telescope survey to study clusters with masses comparable to that of old GCs, where MPs have been identified, but with significantly younger ages. Nine clusters in the Magellanic Clouds with ages between similar to 1.5 and 11 Gyr have been targeted in this survey. We confirm the presence of MPs in all clusters older than 6 Gyr and we add NGC 1978 to the group of clusters for which MPs have been identified. With an age of similar to 2 Gyr, NGC 1978 is the youngest cluster known to host chemical abundance spreads found to date. We do not detect evident star-to-star variations for slightly younger massive clusters (similar to 1.7 Gyr), thus pointing towards an unexpected age dependence for the onset of MPs. This discovery suggests that the formation of MPs is not restricted to the early Universe and that GCs and young massive clusters share common formation and evolutionary processes.
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
653 a stars: abundances
653 a Hertzsprung-Russell and colour-magnitude diagrams
653 a galaxies: clusters: individual: NGC 1978
653 a galaxies: individual: LMC
7001 a Cabrera-Ziri, I.4 aut
7001 a Lardo, C.4 aut
7001 a Dalessandro, E.4 aut
7001 a Bastian, N.4 aut
7001 a Kozhurina-Platais, V.4 aut
7001 a Usher, C.4 aut
7001 a Niederhofer, F.4 aut
7001 a Cordero, M.4 aut
7001 a Geisler, D.4 aut
7001 a Hollyhead, Katherineu Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)kathh
7001 a Kacharov, N.4 aut
7001 a Larsen, S.4 aut
7001 a Li, C.4 aut
7001 a Mackey, D.4 aut
7001 a Hilker, M.4 aut
7001 a Mucciarelli, A.4 aut
7001 a Platais, I.4 aut
7001 a Salaris, M.4 aut
7102 a Stockholms universitetb Institutionen för astronomi4 org
7730 t Monthly notices of the Royal Astronomical Societyd : Oxford University Press (OUP)g 473:2, s. 2688-2700q 473:2<2688-2700x 0035-8711x 1365-2966
8564 u https://academic.oup.com/mnras/article-pdf/473/2/2688/21588263/stx2556.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-153893
8564 8u https://doi.org/10.1093/mnras/stx2556

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