2007MNRAS.382.1729H

Query : 2007MNRAS.382.1729H

2007MNRAS.382.1729H - Mon. Not. R. Astron. Soc., 382, 1729-1737 (2007/December-3)

UV and optical emission lines from the z ∼ 2.6 radio galaxy 0828+193: spatially resolved measurements.

HUMPHREY A., IWAMURO F., VILLAR-MARTIN M., BINETTE L., FOSBURY R. and DI SEREGO ALIGHIERI S.

Abstract (from CDS):

We present an investigation into the spatial variation of the rest-frame ultraviolet (UV) and optical line and continuum emission along the radio axis of the z ∼ 2.6 radio galaxy 0828+193, using long-slit spectra from the Keck II and Subaru telescopes. Line brightnesses, line ratios and electron temperatures are examined, and their relationship with the arm-length asymmetry of the radio source is also investigated. We find that on the side of the nucleus with the shortest radio lobe, the gas covering factor is higher, and the ionization parameter is lower. The contrasts in environmental density required to explain the asymmetries in the line brightness and the radio arm-length asymmetries are in fair agreement with each other. These results add further weight to the conclusion of McCarthy, van Breugel & Kapahi - lobe distance asymmetries in powerful radio sources are the result of an asymmetry in the environmental density.

We also note that the brightness of both the UV and optical continuum emission shows a similar spatial asymmetry to that shown by the line emission. While the UV continuum asymmetry can be wholly explained by the expected asymmetry in the nebular continuum, the optical continuum asymmetry cannot. We argue that, at least at optical wavelengths, the starlight and/or the scattered light must also be strongly spatially asymmetric.

Journal keyword(s): galaxies: active - galaxies: evolution - galaxies: high-redshift - galaxies: ISM - galaxies: jets

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	NVSS J083053+191314	rG	08 30 53.507	+19 13 15.49						~	74	1

Query : 2007MNRAS.382.1729H

Basic data :

NVSS J083053+191314 -- Radio Galaxy
Other object types:	`Rad (NVSS,GB6,...)`, `rG (2013ApJ)`
ICRS coord. (ep=J2000) :	`08 30 53.507 +19 13 15.49 (Radio) [ 2000 2000 90 ] D 1996AJ....111.1945D`
FK4 coord. (ep=B1950 eq=1950) :	`08 28 01.166 +19 23 23.64 [ 2000 2000 90 ]`
Gal coord. (ep=J2000) :	`205.486543 +30.229043 [ 2000 2000 90 ]`
Radial velocity / Redshift / cz :	`V(km/s) 256215 [600] / z(~) 2.572000 [0.002000] / cz 771066.20 [599.58] D 1997A&A...326..505R`

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`NVSS J083053+191314`	`TGSSADR J083053.5+191315`	`VLSSr J083053.2+191315`
`GB6 B0828+1923`	`TXS 0828+193`	`VLSS J0830.8+1913`
`GLEAM J083053+191313`	`USS 0828+193`	`[RLM94] 0828+193`

References (74 between 1850 and 2026) (Total 74)
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