ULTRAVIOLET IMAGING OF OLD POPULATIONS IN NEARBY GALAXIES

被引：63

作者：

OCONNELL, RW

BOHLIN, RC

COLLINS, NR

CORNETT, RH

HILL, JK

HILL, RS

LANDSMAN, WB

ROBERTS, MS

SMITH, AM

STECHER, TP

机构：

[1] SPACE TELESCOPE SCI INST,BALTIMORE,MD 21218

[2] NASA,GODDARD SPACE FLIGHT CTR,HUGHES STX CORP,GREENBELT,MD 20771

[3] NATL RADIO ASTRON OBSERV,CHARLOTTESVILLE,VA 22903

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 395卷 / 01期

关键词：

GALAXIES; INDIVIDUAL; (M31; M32; M81; NGC-1339); PHOTOMETRY; STELLAR CONTENT; ULTRAVIOLET; GENERAL;

D O I：

10.1086/186485

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze UV imagery of two Sb bulges and two E galaxies obtained with the Ultraviolet Imaging Telescope during the Astro-1 mission. The UV brightness of these systems is not produced by recent massive star formation. Instead, it must originate in relatively low-luminosity objects, probably low-mass, post-giant-branch stars. We find extended, large-amplitude UV color gradients, which are probably related to abundance gradients within the galaxies. M32 has a color gradient opposite to the other three objects, possibly because of an intermediate-age population.

引用

页码：L45 / L48

页数：4

共 33 条

[1] IUE OBSERVATIONS OF NGC 4649, AN ELLIPTICAL GALAXY WITH A STRONG ULTRAVIOLET FLUX [J].