ULTRAVIOLET IMAGING OF THE AGN PLUS STARBURST GALAXY NGC-1068

被引:35
作者
NEFF, SG
FANELLI, MN
ROBERTS, LJ
OCONNELL, RW
BOHLIN, R
ROBERTS, MS
SMITH, AM
STECHER, TP
机构
[1] NASA, GODDARD SPACE FLIGHT CTR, HUGHES STX CORP, GREENBELT, MD 20771 USA
[2] UNIV VIRGINIA, DEPT ASTRON, CHARLOTTESVILLE, VA 22903 USA
[3] SPACE TELESCOPE SCI INST, BALTIMORE, MD 21218 USA
[4] NATL RADIO ASTRON OBSERV, CHARLOTTESVILLE, VA 22903 USA
关键词
GALAXIES; ACTIVE; INDIVIDUAL; (NGC-1068); NUCLEI; SEYFERT; ULTRAVIOLET;
D O I
10.1086/174429
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Images of the Seyfert 2 galaxy NGC 1068 were obtained at two ultraviolet wavelengths by the Ultraviolet Imaging Telescope (UIT). These data represent the first detailed UV imagery of a composite (active galactic nucleus + starburst) disk galaxy. NGC 1068 contains multiple components at UV wavelengths: the central active galactic nucleus; a population of very luminous starburst knots; a bright oval inner disk; and a fainter, more circular halo. The most luminous knot, which is located approximately 750 pc from the nucleus at PA 315-degrees, is approximately 80 times the luminosity of 30 Doradus and gives NGC 1068 a ''double nucleus'' appearance in the UV. Significant extended emission is observed throughout the disk, unlike other disk galaxies so far observed in the UV. The radial brightness profile in both UV bandpasses generally follows an exponential decline to approximately 5 kpc. A faint halo extending to approximately 13 kpc is likely to be a galaxian-sized reflection nebula where ambient dust scatters the intense UV continuum from the inner galaxy. UV colors show a striking asymmetric morphology, which is correlated with the observed molecular CO emission.
引用
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页码:545 / +
页数:1
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