Isolating the pre-main sequence in Collinder 34, NGC 3293, NGC 3766 and NGC 6231

Autor:	Saurin, Tiago Abreu, Bica, Eduardo Luiz Damiani, Bonatto, Charles Jose
Jazyk:	angličtina
Rok vydání:	2015
Předmět:	individual: NGC 3766 [Open clusters and associations] Aglomerados estelares Fotometria estelar individual: Collinder 34 [Open clusters and associations] individual: NGC 6231 [Open clusters and associations] individual: NGC 3293 [Open clusters and associations] Formacao de estrelas
Zdroj:	Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS
Popis:	We employed field star decontaminated TwoMicron All Sky Survey photometry to study four nearby optical embedded clusters – Collinder 34, NGC 3293, NGC 3766 and NGC 6231 – obtaining deep colour–magnitude diagrams and stellar radial density profiles. We found what seem to be pre-main sequences detached in different amounts from main sequences in these diagrams. The structural analysis of each cluster revealed different radial distributions for these two sequences. We argued that the detached evolutionary sequences in our sample may be evidence of sequential star formation. Finally, we compared the sample cluster parameters with those of other young clusters in the literature and point out evidence that NGC 3766 and NGC 6231 might be evolving to OB associations.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=od______3056::b5f4a7d4befced69fb843e680a653926 Zobrazit plný text záznamu