A populous intermediate-age open cluster and evidence of an embedded cluster among the FSR globular cluster candidates
dc.contributor.author | Bica, Eduardo Luiz Damiani | pt_BR |
dc.contributor.author | Bonatto, Charles Jose | pt_BR |
dc.date.accessioned | 2014-04-03T01:51:27Z | pt_BR |
dc.date.issued | 2008 | pt_BR |
dc.identifier.issn | 0035-8711 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/90273 | pt_BR |
dc.description.abstract | We study the nature of the globular cluster (GC) candidates FSR 1603 and FSR 1755 selected from the catalogue of Froebrich, Scholz & Raftery. Their properties are investigated with Two-Micron All-Sky Survey field-star decontaminated photometry, which is used to build colour–magnitude diagrams (CMDs) and stellar radial density profiles. FSR 1603 has the open cluster Ruprecht 101 as optical counterpart, and we show it to be a massive intermediate-age cluster. Relevant parameters of FSR 1603 are the age ≈ 1 Gyr, distance from the Sun dʘ ≈ 2.7 kpc, Galactocentric distance RGC ≈ 6.4 kpc, core radius RC ≈ 1.1 pc, mass function slope χ ≈ 1.8, observed stellar mass (for stars with mass in the range 1.27 ≤ m ≤ 2.03 Mʘ) Mobs ≈ 500Mʘ and a total (extrapolated to m = 0.08Mʘ) stellar mass Mtot ≈ 2300Mʘ. FSR 1755, on the other hand, is not a populous cluster. It may be a sparse young cluster embedded in the H II region Sh 2-3, subject to an absorption AV ≈ 4.1, located at dʘ ≈ 1.3 kpc. Important fieldstar contamination, spatially variable heavy dust obscuration, even in Ks, and gas emission characterize its field. A nearly vertical, sparse blue stellar sequence shows up in the CMDs. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Monthly notices of the royal astronomical society. Oxford. Vol. 384, no. 4 (Mar. 2008), p. 1733-1740 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Aglomerados abertos e associações | pt_BR |
dc.subject | Open clusters and associations: general | en |
dc.subject | Galaxy: structure | en |
dc.subject | Aglomerados globulares | pt_BR |
dc.subject | Propriedades das galaxias | pt_BR |
dc.subject | Estruturas galaticas | pt_BR |
dc.subject | Fotometria astronômica | pt_BR |
dc.title | A populous intermediate-age open cluster and evidence of an embedded cluster among the FSR globular cluster candidates | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000674027 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
Este item está licenciado na Creative Commons License
-
Artigos de Periódicos (39558)Ciências Exatas e da Terra (6036)