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Tracing the Giant Outer Halo of the Mysterious Massive Disk Galaxy M104. I. Photometry of the Extended Globular Cluster Systems
DC Field | Value | Language |
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dc.contributor.author | Kang, Jisu | - |
dc.contributor.author | Lee, Myung Gyoon | - |
dc.contributor.author | Jang, In Sung | - |
dc.contributor.author | Ko, Youkyung | - |
dc.contributor.author | Sohn, Jubee | - |
dc.contributor.author | Hwang, Narae | - |
dc.contributor.author | Park, Byeong-Gon | - |
dc.date.accessioned | 2024-01-24T05:50:40Z | - |
dc.date.available | 2024-01-24T05:50:40Z | - |
dc.date.created | 2022-11-25 | - |
dc.date.created | 2022-11-25 | - |
dc.date.issued | 2022-11 | - |
dc.identifier.citation | Astrophysical Journal, Vol.939 No.2, p. 74 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.uri | https://hdl.handle.net/10371/198939 | - |
dc.description.abstract | M104 (NGC 4594, the Sombrero galaxy) is a mysterious massive early-type galaxy that shows a dominant bulge and a prominent disk. However, the presence of a halo in M104 has been elusive, and it is not yet known howM104 has acquired such a peculiar structure. Using wide (similar to 2 deg(2)) and deep ugi images of M104 obtained with the CFHT/Mega Cam, we detect a large number of globular clusters (GCs) found out to R asymptotic to 35' (similar to 100 kpc). The color distribution of these GCs shows two subpopulations: a blue (metal-poor) system and a red (metal-rich) system. The total number of GCs is estimated to be N-GC= 1610 +/- 30 and the specific frequency to be S-N=1.8 +/- 0.1. The radial number density profile of the GCs is steep in the inner region at R < 20' and becomes shallow in the outer region at 20' < R < 35'. The outer region is dominated by blue GCs and is extended out toR35 & raquo;cent. This shows clearly the existence of a giant metal-poor halo in M104. The inner region is composed of a bulge hosting a disk, corresponding to a metal-rich halo as seen in early-type galaxies. At least two clumps of blue GCs are found in the outer region. One clump is overlapped with a faint stellar stream located in the southwest, indicating that it may be a remnant of a disrupted dwarf galaxy. Our results imply that the metal-rich inner halo ofM104 formed first via major mergers, and the metal-poor outer halo grew via numerous minor mergers | - |
dc.language | 영어 | - |
dc.publisher | University of Chicago Press | - |
dc.title | Tracing the Giant Outer Halo of the Mysterious Massive Disk Galaxy M104. I. Photometry of the Extended Globular Cluster Systems | - |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/ac9670 | - |
dc.citation.journaltitle | Astrophysical Journal | - |
dc.identifier.wosid | 000882466800001 | - |
dc.identifier.scopusid | 2-s2.0-85142030305 | - |
dc.citation.number | 2 | - |
dc.citation.startpage | 74 | - |
dc.citation.volume | 939 | - |
dc.description.isOpenAccess | Y | - |
dc.contributor.affiliatedAuthor | Lee, Myung Gyoon | - |
dc.contributor.affiliatedAuthor | Sohn, Jubee | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.subject.keywordPlus | SOMBRERO GALAXY | - |
dc.subject.keywordPlus | METALLICITY DISTRIBUTION | - |
dc.subject.keywordPlus | CATALOG | - |
dc.subject.keywordPlus | KINEMATICS | - |
dc.subject.keywordPlus | DWARF | - |
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