2006MNRAS.366L...1V

Query : 2006MNRAS.366L...1V

2006MNRAS.366L...1V - Mon. Not. R. Astron. Soc., 366, L1-L5 (2006/February-2)

VIMOS-VLT and Spitzer observations of a radio galaxy at z= 2.5.

VILLAR-MARTIN M., SANCHEZ S.F., DE BREUCK C., PELETIER R., VERNET J., RETTURA A., SEYMOUR N., HUMPHREY A., STERN D., DI SEREGO ALIGHIERI S. and FOSBURY R.

Abstract (from CDS):

We present: (i) a kinematic and morphological study of the giant Lyα nebula associated with the radio galaxy MRC 2104-242 (z= 2.49) based on integral field spectroscopic Visible Multiobject Spectrograph (VIMOS) data from the Very Large Telescope (VLT), and (ii) a photometric study of the host (proto{quest}) galaxy based on Spitzer Space Telescope data. The galaxy appears to be embedded in a giant (≳120 kpc) gas reservoir that surrounds it completely. The kinematic properties of the nebula suggest that it is a rotating structure, which would imply a lower limit to the dynamical mass of ∼3x10¹¹M_☉. An alternate scenario is that the gas is infalling. Such a process would be able to initiate and sustain significant central starburst activity, although it is likely to contribute with less than 10 per cent of the total stellar mass.

The near- to mid-infrared spectral energy distribution of the radio galaxy suggests the existence of a reddened, E(B-V) = 0.4±0.1, evolved stellar population of age ≳1.8 Gyr and mass (5±2)x10¹¹M_☉. The implied formation redshift is z_f≳ 6. This stellar mass is similar to the stellar masses found for massive early-type galaxies at z∼ 2 in deep, near-infrared surveys.

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: individual: MRC 2104-242

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	PMN J2106-2404	rG	21 06 58.463	-24 05 06.11		23.0				~	79	2

Query : 2006MNRAS.366L...1V

Basic data :

PMN J2106-2404 -- Radio Galaxy

rG (), Rad (PMN,GLEAM,...), AGN ([HB91]), G (LEDA)

21 06 58.463 -24 05 06.11 (Radio) [ 2000 2000 90 ] D 1996AJ....111.1945D

21 04 03.981 -24 17 11.77 [ 2000 2000 90 ]

023.117226 -39.722348 [ 2000 2000 90 ]

V(km/s) 254325 [~] / z(~) 2.491000 [~] / cz 746783.01 [~] D 1991ApJS...75..297H

B 23.0 [~] E ~

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`PMN J2106-2404`	`MRC 2104-242`	`TXS 2104-242`	`[HB91] 2104-242`
`GLEAM J210658-240505`	`NVSS J210658-240504`	`VLSSr J210657.4-240510`
`1Jy 2104-242`	`SPASS J210703-240440`	`WISH B2104.0-2417`
`LEDA 2830749`	`TGSSADR J210658.3-240504`	`[DVR2000] TN J2106-2405`

References (79 between 1850 and 2026) (Total 79)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Data at NED - NASA/IPAC Extragalactic Database : PMN J2106-2404

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PMN J2106-2404 NVSS J210658-240504 WISH B2104.0-2417

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