SIMBAD references

2009MNRAS.395L..16N - Mon. Not. R. Astron. Soc., 395, L16-L20 (2009/May-1)

CO line emission in the halo of a radio galaxy at z = 2.6.

NESVADBA N.P.H., NERI R., DE BREUCK C., LEHNERT M.D., DOWNES D., WALTER F., OMONT A., BOULANGER F. and SEYMOUR N.

Abstract (from CDS):

We report the detection of luminous CO(3-2) line emission in the halo of the z = 2.6 radio galaxy (HzRG) TXS0828+193, which has no detected counterpart at optical to mid-infrared wavelengths implying a stellar mass ≲ few x109M and relatively low star formation rates. With the IRAM Plateau de Bure Interferometer (PdBI), we find two CO emission-line components at the same position at ∼80 kpc distance from the HzRG along the axis of the radio jet, with different blueshifts of few 100 km/s relative to the HzRG and a total luminosity of ∼2x1010 K.km/s/pc2 detected at a total significance of ∼8σ. HzRGs have significant galaxy overdensities and extended haloes of metal-enriched gas often with embedded clouds or filaments of denser material, and likely trace very massive dark matter haloes. The CO emission may be associated with a gas-rich, low-mass satellite galaxy with very little ongoing star formation, in contrast to all previous CO detections of galaxies at similar redshifts. Alternatively, the CO may be related to a gas cloud or filament and perhaps jet-induced gas cooling in the outer halo, somewhat in analogy with extended CO emission found in low-redshift galaxy clusters.

Abstract Copyright: © 2009 The Authors. Journal compilation © 2009 RAS

Journal keyword(s): galaxies: high-redshift - galaxies: individual: TXS0828+193 - radio lines: galaxies

Simbad objects: 6

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2019.10.19-18:08:00

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