2004A&A...424..455L


Query : 2004A&A...424..455L

2004A&A...424..455L - Astronomy and Astrophysics, volume 424, 455-464 (2004/9-3)

On-axis spectroscopy of the z=0.144 radio-loud quasar HE 1434-1600: an elliptical host with a highly ionized ISM.

LETAWE G., COURBIN F., MAGAIN P., HILKER M., JABLONKA P., JAHNKE K. and WISOTZKI L.

Abstract (from CDS):

VLT on-axis optical spectroscopy of the z=0.144 radio-loud quasar HE 1434-1600 is presented. The spatially resolved spectra of the host galaxy are deconvolved and separated from those of the central quasar in order to study the dynamics of the stars and gas as well as the physical conditions of the ISM. We find that the host of HE 1434-1600 is an elliptical galaxy that resides in a group of at least 5 member galaxies, and that most likely experienced a recent collision with its nearest companion. Compared with other quasar host galaxies, HE 1434-1600 has a highly ionized ISM. The ionization state corresponds to that of typical Seyferts, but the ionized regions are not distributed in a homogeneous way around the QSO, and are located preferentially several kiloparsecs away from it. While the stellar absorption lines do not show any significant velocity field, the gas emission lines do. The observed gas velocity field is hard to reconcile with dynamical models involving rotating disk, modified Hubble laws or power laws, that all require extreme central masses (M>109M) to provide only poor fit to the data. Power law models, which best fit the data, provide a total mass of M(<10kpc)=9.2x1010M. We conclude that the recent interaction between HE 1434-1600 and its closest companion has strongly affected the gas velocity and ionization state, from the center of the galaxy to its most external parts.

Abstract Copyright:

Journal keyword(s): galaxies: kinematics and dynamics - galaxies: interactions - galaxies: quasars: individual: HE 1434-1600 - techniques: image processing - techniques: spectroscopic

Nomenclature: Fig.1, Table 4: [LCM2004] GN (Nos G1-G5).

Simbad objects: 13

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Number of rows : 13
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 Mrk 110 Sy1 09 25 12.8479065576 +52 17 10.386311208   16.82 16.41     ~ 544 0
2 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 748 1
3 NGC 4041 SyG 12 02 12.2376697152 +62 08 14.096124312   11.6       ~ 238 1
4 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6644 3
5 NAME Centaurus A Sy2 13 25 27.6039817176 -43 01 09.493008456   8.18 6.84 6.66   ~ 4230 3
6 NGC 5252 Sy2 13 38 15.8707724328 +04 32 33.521265600   15.21 14.21     ~ 448 0
7 [LCM2004] G5 G 14 36 41.9 -16 12 49           ~ 1 0
8 [LCM2004] G3 G 14 36 45.8 -16 14 44           ~ 1 0
9 [LCM2004] G2 G 14 36 47.8 -16 14 19           ~ 1 0
10 [LCM2004] G4 G 14 36 48.9 -16 14 44           ~ 1 0
11 [LCM2004] G1 G 14 36 49 -16 13.7           ~ 1 1
12 HE 1434-1600 QSO 14 36 49.6204486608 -16 13 41.196438048   17.08 15.8 16.00   ~ 49 1
13 LEDA 3096406 Sy1 15 06 10.5025321344 +02 16 50.063643732   16.60 16.38     ~ 42 0

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2022.05.22-01:34:42

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