The ubiquitous radio continuum emission from the most massive early-type galaxies

Michael J I Brown, Buell Tomasson Jannuzi, David J E Floyd, Jeremy R. Mould

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

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 MK < -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.

Original languageEnglish (US)
Article numberL41
JournalAstrophysical Journal Letters
Volume731
Issue number2 PART II
DOIs
StatePublished - Apr 20 2011
Externally publishedYes

Fingerprint

radio
galaxies
continuums
Very Large Array (VLA)
radio telescopes
extremely high frequencies
active galactic nuclei
imagery
star formation
flux density
luminosity
telescopes
distribution

Keywords

  • galaxies: active
  • galaxies: elliptical and lenticular, cD
  • radio continuum: galaxies

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

The ubiquitous radio continuum emission from the most massive early-type galaxies. / Brown, Michael J I; Jannuzi, Buell Tomasson; Floyd, David J E; Mould, Jeremy R.

In: Astrophysical Journal Letters, Vol. 731, No. 2 PART II, L41, 20.04.2011.

Research output: Contribution to journalArticle

Brown, Michael J I ; Jannuzi, Buell Tomasson ; Floyd, David J E ; Mould, Jeremy R. / The ubiquitous radio continuum emission from the most massive early-type galaxies. In: Astrophysical Journal Letters. 2011 ; Vol. 731, No. 2 PART II.
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