UGC GALAXIES STRONGER THAN 25 MJY AT 4.85 GHZ

被引:119
作者
CONDON, JJ [1 ]
FRAYER, DT [1 ]
BRODERICK, JJ [1 ]
机构
[1] VIRGINIA POLYTECH INST & STATE UNIV,DEPT PHYS,BLACKSBURG,VA 24061
关键词
D O I
10.1086/115692
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
UGC galaxies in the declination band + 5-degrees < delta < + 75-degrees were identified by position coincidence with radio sources stronger than 25 mJy on the Green Bank 4.85 GHz sky maps. Candidate identifications were confirmed or rejected with the aid of published aperture-synthesis maps and new 4.86 GHz VLA maps having 15 or 18 arcsec resolution, resulting in a sample of 347 nearby radio galaxies plus five new quasar-galaxy pairs. The radio energy sources in UGC galaxies were classified as "starbursts" or "monsters" on the basis of their infrared-radio flux ratios, infrared spectral indices, and radio morphologies. The rms scatter in the logarithmic infrared-radio ratio q is not more than sigma-q = 0.16 for starburst galaxies selected at 4.85 GHz. Radio spectral indices were obtained for nearly all of the UGC galaxies, and SO galaxies account for a disproportionate share of the compact flat-spectrum (alpha < 0.5) radio sources. The extended radio jets and lobes produced by monsters are preferentially, but not exclusively, aligned within about 30-degrees of the optical minor axes of their host galaxies. The tendency toward minor-axis ejection appears to be independent of radio-source size and is strongest for elliptical galaxies.
引用
收藏
页码:362 / &
相关论文
共 241 条
  • [1] ALLEN RJ, 1978, ASTRON ASTROPHYS, V62, P397
  • [2] ANDERNACH H, 1988, ASTRON ASTROPHYS SUP, V73, P265
  • [3] VLA MAPS OF 41 RADIO GALAXIES
    ANTONUCCI, RRJ
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1985, 59 (04) : 499 - 511
  • [4] BAARS JWM, 1977, ASTRON ASTROPHYS, V61, P99
  • [5] BAKER JR, 1977, ASTRON ASTROPHYS, V59, P261
  • [6] BALICK B, 1981, ASTRON ASTROPHYS, V96, P271
  • [7] THE GLOBAL SPIRAL STRUCTURE OF M81 - RADIO-CONTINUUM MAPS
    BASH, FN
    KAUFMAN, M
    [J]. ASTROPHYSICAL JOURNAL, 1986, 310 (02) : 621 - &
  • [8] BECK R, 1979, ASTRON ASTROPHYS, V77, P25
  • [9] THE MIT GREEN BANK (MG) 5 GHZ SURVEY
    BENNETT, CL
    LAWRENCE, CR
    BURKE, BF
    HEWITT, JN
    MAHONEY, J
    [J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1986, 61 (01) : 1 - &
  • [10] BERKHUIJSEN EM, 1983, ASTRON ASTROPHYS, V127, P395