Radio sources and star formation in the local universe

被引:382
作者
Condon, JJ
Cotton, WD
Broderick, JJ
机构
[1] Natl Radio Astron Observ, Charlottesville, VA 22903 USA
[2] Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA
关键词
catalogs; galaxies : evolution; galaxies : general; galaxies : luminosity function; mass function; galaxies : starburst; radio continuum;
D O I
10.1086/341650
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Galaxies from the entire Uppsala Galaxy Catalog (UGC) have been identified with 4583 radio sources stronger than 2.5 mJy at 1.4 GHz from the NRAO VLA Sky Survey (NVSS). The complete sample of 3398 galaxies brighter than m(p) = 14.5 in the area defined by delta > -2degrees30' and \b\ > 20degrees yielded the UGC/NVSS sample of 1966 radio sources. Their dominant energy sources were classified as stars (85%) or active galactic nuclei (15%). The luminosity function of star-forming galaxies agrees well with the far-infrared (FIR) luminosity function converted to 1.4 GHz by the FIR/radio correlation. The spectral power density of star-forming galaxies is U-SF = (1.53 +/- 0.07) x 10(19) W Hz(-1) Mpc(-3) (statistical errors only) if H-o = 70 km s(-1) Mpc(-1). We used a model consistent with the observed FIR/radio correlation to estimate the corresponding star formation rate density within the past tau similar to 3 x 10(8) yr; it is rho(SF)(M > 0.1 M-.) approximate to 0.018 M-. yr(-1) Mpc(-3). The radio sources in star-forming galaxies may be evolving even at moderately low redshifts (z similar to 0.1).
引用
收藏
页码:675 / 689
页数:15
相关论文
共 98 条
[1]  
ANDERNACH H, 1992, ASTRON ASTROPHYS SUP, V93, P331
[2]  
[Anonymous], UPPSALA GEN CATALOG
[3]   3 QUASARS NEAR THE SPIRAL ARMS OF NGC-1073 [J].
ARP, H ;
SULENTIC, JW .
ASTROPHYSICAL JOURNAL, 1979, 229 (02) :496-&
[4]   VLA OBSERVATIONS OF RADIO-SOURCES IN INTERACTING GALAXY PAIRS IN POOR CLUSTERS [J].
BATUSKI, DJ ;
HANISCH, RJ ;
BURNS, JO .
ASTRONOMICAL JOURNAL, 1992, 103 (04) :1077-1083
[5]   RBSC-NVSS sample. I. Radio and optical identifications of a complete sample of 1556 bright X-ray sources [J].
Bauer, FE ;
Condon, JJ ;
Thuan, TX ;
Broderick, JJ .
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2000, 129 (02) :547-562
[6]   TOWARD UNDERSTANDING THE FANAROFF-RILEY DICHOTOMY IN RADIO-SOURCE MORPHOLOGY AND POWER [J].
BAUM, SA ;
ZIRBEL, EL ;
ODEA, CP .
ASTROPHYSICAL JOURNAL, 1995, 451 (01) :88-99
[7]   THE FIRST SURVEY - FAINT IMAGES OF THE RADIO SKY AT 20 CENTIMETERS [J].
BECKER, RH ;
WHITE, RL ;
HELFAND, DJ .
ASTROPHYSICAL JOURNAL, 1995, 450 (02) :559-577
[8]  
BERKHUIJSEN EM, 1984, ASTRON ASTROPHYS, V140, P431
[9]  
BEUERMANN K, 1985, ASTRON ASTROPHYS, V153, P17
[10]   STUDIES OF THE VIRGO CLUSTER .2. A CATALOG OF 2096 GALAXIES IN THE VIRGO CLUSTER AREA [J].
BINGGELI, B ;
SANDAGE, A ;
TAMMANN, GA .
ASTRONOMICAL JOURNAL, 1985, 90 (09) :1681-1758