2010A&A...519A.115H


Query : 2010A&A...519A.115H

2010A&A...519A.115H - Astronomy and Astrophysics, volume 519, A115-115 (2010/9-1)

Mapping the ionised gas around the luminous QSO He 1029-1401: evidence for minor merger events?

HUSEMANN B., SANCHEZ S.F., WISOTZKI L., JAHNKE K., KUPKO D., NUGROHO D. and SCHRAMM M.

Abstract (from CDS):

We present VIMOS integral field spectroscopy of the brightest radio-quiet QSO on the southern sky HE 1029-1401 at a redshift of z=0.086. Standard decomposition techniques for broad-band imaging are extended to integral field data in order to deblend the QSO and host emission. We perform a tentative analysis of the stellar continuum, finding a young stellar population (<100Myr) or a featureless continuum embedded in an old stellar population (10Gyr) typical for a massive elliptical galaxy. The stellar velocity dispersion of σ*=320±90km/s and the estimated black hole mass log(MBH/M)=8.7±0.3 are consistent with the local MBH* relation within the errors. For the first time, we map the two-dimensional ionised gas distribution and the gas velocity field around HE 1029-1401. While the stellar host morphology is purely elliptical, we find a highly structured distribution of ionised gas out to 16kpc from the QSO. The gas is highly ionised solely by the QSO radiation and has a significantly lower metallicity than would be expected for the stellar mass of the host, indicating an external origin of the gas most likely due to minor mergers. We find a rotating gas disc around the QSO and a dispersion-dominated non-rotating gas component within the central 3kpc. At larger distances the velocity field is heavily disturbed, which could be interpreted as another signature of past minor merger events. Alternatively, the arc-like structure seen in the ionised gas might also be indicative of a large-scale expanding bubble, centred on and possibly driven by the active nucleus.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: ISM - quasars: emission lines - quasars: individual: HE 1029-1401

Nomenclature: Fig. 1: [HSW2010] SN (Nos S1-S2).

Simbad objects: 12

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Number of rows : 12
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 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2673 2
2 3C 79.0 Sy2 03 10 00.0936589848 +17 05 58.599361932   19.54 18.75     ~ 248 3
3 [HSW2010] S2 PoG 03 51 53.12 -14 16 41.4           ~ 1 0
4 [HSW2010] S1 PoG 03 51 54.32 -14 17 01.4           ~ 1 0
5 Mrk 1506 Sy1 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 1915 2
6 LEDA 75249 Sy1 04 52 30.0811 -29 53 35.226 15.07 17.39 15.35 16.06   ~ 119 0
7 [W94c] 1 G 10 31 54.0 -14 16 51           ~ 2 0
8 [W94c] 2 G 10 31 54.0 -14 16 51           ~ 2 0
9 [W94c] 3 G 10 31 54.0 -14 16 51           ~ 2 0
10 HE 1029-1401 Sy1 10 31 54.3173785536 -14 16 51.378102372   14.08 13.86     ~ 119 0
11 Mrk 231 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 1894 3
12 4C 37.43 Sy1 15 14 43.0683049560 +36 50 50.355436776   17.11 17.01 15.83   ~ 386 1

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2022.05.21-13:57:15

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