The M87 globular cluster system revisited

被引:34
作者
Elson, RAW
Santiago, BX
机构
[1] Institute of Astronomy, Cambridge CB3 0HA, Madingley Road
关键词
globular clusters; general; galaxies; individual; M87; star clusters;
D O I
10.1093/mnras/280.3.971
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present V and I photometry for a sample of 220 globular cluster candidates in the Virgo galaxy M87. The sample is essentially complete to V = 26. We confirm the bimodal colour distribution found by Elson & Santiago (Paper I), and find peaks at (V -I) = 0.92 and 1.23. A comparison with the colour distribution of globular clusters in the Milky Way shows that M87 contains a large population of red clusters that is virtually absent in our Galaxy. We also confirm the suggestion in Paper I that the luminosity functions of the red and blue clusters are different. The brighter clusters are predominantly blue, while the fainter clusters are roughly equally divided between red and blue. The presence of two distinct subpopulations with different mean luminosities casts doubt on the common assumption of a universal luminosity function for globular clusters.
引用
收藏
页码:971 / 976
页数:6
相关论文
共 20 条
  • [1] VRI PHOTOMETRY OF GLOBULAR-CLUSTERS IN VIRGO AND LEO ELLIPTICALS
    AJHAR, EA
    BLAKESLEE, JP
    TONRY, JL
    [J]. ASTRONOMICAL JOURNAL, 1994, 108 (06) : 2087 - 2101
  • [2] THE FORMATION OF GLOBULAR-CLUSTERS IN MERGING AND INTERACTING GALAXIES
    ASHMAN, KM
    ZEPF, SE
    [J]. ASTROPHYSICAL JOURNAL, 1992, 384 (01) : 50 - 61
  • [3] OXYGEN-ENHANCED MODELS FOR GLOBULAR-CLUSTER STARS .2. ISOCHRONES AND LUMINOSITY FUNCTIONS
    BERGBUSCH, PA
    VANDENBERG, DA
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1992, 81 (01) : 163 - 220
  • [4] EXTRAGALACTIC GLOBULAR-CLUSTERS .3. METALLICITY COMPARISONS AND ANOMALIES
    BRODIE, JP
    HUCHRA, JP
    [J]. ASTROPHYSICAL JOURNAL, 1991, 379 (01) : 157 - 167
  • [5] BVI PHOTOMETRY OF GLOBULAR-CLUSTERS IN M87
    COUTURE, J
    HARRIS, WE
    ALLWRIGHT, JWB
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1990, 73 (04) : 671 - 683
  • [6] DJORGOVSKI SG, 1993, ASP C SER, V50, P3
  • [7] The globular clusters in M87: A bimodal, colour distribution
    Elson, RAW
    Santiago, BX
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1996, 278 (02) : 617 - 624
  • [8] CCD PHOTOMETRY OF THE GLOBULAR-CLUSTER SYSTEMS IN NGC-4494 AND NGC-4565
    FLEMING, DEB
    HARRIS, WE
    PRITCHET, CJ
    HANES, DA
    [J]. ASTRONOMICAL JOURNAL, 1995, 109 (03) : 1044 - 1054
  • [9] DISTANCE TO THE VIRGO CLUSTER GALAXY M100 FROM HUBBLE-SPACE-TELESCOPE OBSERVATIONS OF CEPHEIDS
    FREEDMAN, WL
    MADORE, BF
    MOULD, JR
    HILL, R
    FERRARESE, L
    KENNICUTT, RC
    SAHA, A
    STETSON, PB
    GRAHAM, JA
    FORD, H
    HOESSEL, JG
    HUCHRA, J
    HUGHES, SM
    ILLINGWORTH, GD
    [J]. NATURE, 1994, 371 (6500) : 757 - 762
  • [10] HUBBLE-SPACE-TELESCOPE MEDIUM DEEP SURVEY WITH THE WIDE-FIELD AND PLANETARY CAMERA .1. METHODOLOGY AND RESULTS ON THE FIELD NEAR 3C-273
    GRIFFITHS, RE
    RATNATUNGA, KU
    NEUSCHAEFER, LW
    CASERTANO, S
    IM, M
    WYCKOFF, EW
    ELLIS, RS
    GILMORE, GF
    ELSON, RAW
    GLAZEBROOK, K
    SCHADE, DJ
    WINDHORST, RA
    SCHMIDTKE, PC
    GORDON, JM
    PASCARELLE, SM
    ILLINGWORTH, GD
    KOO, DC
    BERSHADY, MA
    FORBES, DA
    PHILLIPS, AC
    GREEN, RF
    SARAJEDINI, V
    HUCHRA, JP
    TYSON, AJ
    [J]. ASTROPHYSICAL JOURNAL, 1994, 437 (01) : 67 - 82