Keck/KCWI spectroscopy of globular clusters in local volume dwarf galaxies

被引:1
|
作者
Forbes, Duncan A. [1 ]
Lyon, Daniel [2 ]
Gannon, Jonah [1 ]
Romanowsky, Aaron J. [3 ,4 ]
Brodie, Jean P. [1 ,4 ]
机构
[1] Swinburne Univ, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia
[2] Queensland Univ Technol, Sci & Engn Fac, Sch Chem & Phys, Gardens Point Campus, Brisbane, Qld 4001, Australia
[3] San Jose State Univ, Dept Phys & Astron, One Washington Sq, San Jose, CA 95192 USA
[4] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA
基金
美国国家航空航天局;
关键词
galaxies: dwarf; galaxies: star clusters: general; galaxies: halos; galaxies: formation; OUTER HALO; SYSTEMS;
D O I
10.1017/pasa.2024.41
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A number of nearby dwarf galaxies have globular cluster (GC) candidates that require spectroscopic confirmation. Here, we present Keck telescope spectra for 15 known GCs and GC candidates that may be associated with a host dwarf galaxy and an additional 3 GCs in the halo of M31 that are candidates for accretion from a now-disrupted dwarf galaxy. We confirm six star clusters (of intermediate-to-old age) to be associated with NGC 247. The vast bulk of its GC system remains to be studied spectroscopically. We also confirm the GC candidates in F8D1 and DDO190, finding both to be young star clusters. The three M31 halo GCs all have radial velocities consistent with M31 and are old and very metal-poor. Their ages and metallicities are consistent with accretion from a low-mass satellite galaxy. Finally, three objects are found to be background galaxies - two are projected near NGC 247 and one (candidate GCC7) is near the IKN dwarf. The IKN dwarf thus has only five confirmed GCs but still a remarkable specific frequency of 124.
引用
收藏
页数:7
相关论文
共 50 条
  • [31] Keck spectroscopy of globular clusters in the elliptical galaxy NGC 3610
    Strader, J
    Brodie, JP
    Schweizer, F
    Larsen, SS
    Seitzer, P
    ASTRONOMICAL JOURNAL, 2003, 125 (02): : 626 - 633
  • [32] Globular clusters in high-redshift dwarf galaxies: a case study from the Local Group
    Zick, Tom O.
    Weisz, Daniel R.
    Boylan-Kolchin, Michael
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 477 (01) : 480 - 490
  • [33] Ultra compact objects in the Fornax cluster of galaxies: Globular clusters or dwarf galaxies?
    Mieske, S
    Hilker, M
    Infante, L
    ASTRONOMY & ASTROPHYSICS, 2002, 383 (03) : 823 - 837
  • [34] The initial mass spectrum of old globular clusters in dwarf galaxies
    Kruijssen, J. M. Diederik
    Cooper, Andrew P.
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2012, 420 (01) : 340 - 345
  • [35] The formation of ultra compact dwarf galaxies and massive globular clusters
    Jerabkova, T.
    Kroupa, P.
    Dabringhausen, J.
    Hilker, M.
    Bekki, K.
    ASTRONOMY & ASTROPHYSICS, 2017, 608
  • [36] The physical structure of young globular clusters and young dwarf galaxies
    Oliveira, SR
    Opher, R
    Miranda, OD
    de Araujo, JCN
    YOUNG GALAXIES AND QSO ABSORPTION-LINE SYSTEMS, 1997, 114 : 125 - 128
  • [37] CARBON IN RED GIANTS IN GLOBULAR CLUSTERS AND DWARF SPHEROIDAL GALAXIES
    Kirby, Evan N.
    Guo, Michelle
    Zhang, Andrew J.
    Deng, Michelle
    Cohen, Judith G.
    Guhathakurta, Puragra
    Shetrone, Matthew D.
    Lee, Young Sun
    Rizzi, Luca
    ASTROPHYSICAL JOURNAL, 2015, 801 (02):
  • [38] The effects of dwarf galaxies on the orbital evolution of galactic globular clusters
    Garrow, Turner
    Webb, Jeremy J.
    Bovy, Jo
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2020, 499 (01) : 804 - 813
  • [39] Keck spectroscopy of candidate proto-globular clusters in NGC 1275
    Brodie, JP
    Schroder, LL
    Huchra, JP
    Phillips, AC
    Kissler-Patig, M
    Forbes, DA
    ASTRONOMICAL JOURNAL, 1998, 116 (02): : 691 - 706
  • [40] Keck spectroscopy and imaging of globular clusters in the lenticular galaxy NGC 524
    Beasley, MA
    Forbes, DA
    Brodie, JP
    Kissler-Patig, M
    MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 347 (04) : 1150 - 1163