THE UBIQUITOUS RADIO CONTINUUM EMISSION FROM THE MOST MASSIVE EARLY-TYPE GALAXIES

被引：70

作者：

Brown, Michael J. I. ^{[1
]}

Jannuzi, Buell T. ^{[2
]}

Floyd, David J. E. ^{[3
]}

Mould, Jeremy R. ^{[3
,4
]}

机构：

[1] Monash Univ, Sch Phys, Clayton, Vic 3800, Australia

[2] Natl Opt Astron Observ, Tucson, AZ 85726 USA

[3] Univ Melbourne, Sch Phys, Parkville, Vic, Australia

[4] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Melbourne, Vic 3122, Australia

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2011年 / 731卷 / 02期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

galaxies: active; galaxies: elliptical and lenticular; cD; radio continuum: galaxies; ACTIVE GALACTIC NUCLEI; MHZ SKY SURVEY; STAR-FORMATION; COOLING FLOWS; BLACK-HOLES; ORIGIN; MAPS; GAS; LUMINOSITIES; CATALOG;

D O I：

10.1088/2041-8205/731/2/L41

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the radio continuum emission of 396 early-type galaxies brighter than K = 9, using 1.4 GHz imagery from the NRAO Very Large Array Sky Survey, Green Bank 300 ft Telescope, and 64 m Parkes Radio Telescope. For M-K < -24 early-type galaxies, the distribution of radio powers at fixed absolute magnitude spans four orders of magnitude and the median radio power is proportional to K-band luminosity to the power 2.78 +/- 0.16. The measured flux densities of M-K < -25.5 early-type galaxies are greater than zero in all cases. It is thus highly likely that the most massive galaxies always host an active galactic nucleus or have recently undergone star formation.

引用

页数：5

共 42 条

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