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THE SNAPSHOT HUBBLE...
THE SNAPSHOT HUBBLE U-BAND CLUSTER SURVEY (SHUCS). II. THE STAR CLUSTER POPULATION OF NGC 2997
- Artikel/kapitelEngelska2014
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2014-07-09
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American Astronomical Society,2014
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LIBRIS-ID:oai:DiVA.org:su-106726
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-106726URI
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https://doi.org/10.1088/0004-6256/148/2/33DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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AuthorCount:9;
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We study the star cluster population of NGC 2997, a giant spiral galaxy located at 9.5 Mpc and targeted by the Snapshot Hubble U-band Cluster Survey (SHUCS). Combining our U-band imaging from SHUCS with archival BVI imaging from the Hubble Space Telescope, we select a high confidence sample of clusters in the circumnuclear ring and disk through a combination of automatic detection procedures and visual inspection. The cluster luminosity functions in all four filters can be approximated by power laws with indices of -1.7 to -2.3. Some deviations from pure power-law shape are observed, hinting at the presence of a high-mass truncation in the cluster mass function. However, upon inspection of the cluster mass function, we find it is consistent with a pure power law of index -2.2 +/- 0.2 despite a slight bend at similar to 2.5 x 10(4) M-circle dot. No statistically significant truncation is observed. From the cluster age distributions, we find a low rate of disruption(zeta similar to -0.1) in both the disk and circumnuclear ring. Finally, we estimate the cluster formation efficiency (Gamma) over the last 100 Myr in each region, finding 7% +/- 2% for the disk, 12% +/- 4% for the circumnuclear ring, and 10% +/- 3% for the entire UBVI footprint. This study highlights the need for wide-field UBVI coverage of galaxies to study cluster populations in detail, though a small sample of clusters can provide significant insight into the characteristics of the population.
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Adamo, AngelaStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)anad2127
(författare)
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Bastian, N.
(författare)
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Smith, L. J.
(författare)
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Gallagher, J. S. , I I I
(författare)
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Konstantopoulos, I. S.
(författare)
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Larsen, S.
(författare)
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Silva-Villa, E.
(författare)
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Zackrisson, ErikStockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)erza6638
(författare)
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Stockholms universitetInstitutionen för astronomi
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Astronomical Journal: American Astronomical Society148:2, s. 33-0004-62561538-3881
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