2018MNRAS.478.3890B


C.D.S. - SIMBAD4 rel 1.7 - 2021.06.25CEST02:56:57

2018MNRAS.478.3890B - Mon. Not. R. Astron. Soc., 478, 3890-3934 (2018/August-2)

The COS-AGN survey: revealing the nature of circumgalactic gas around hosts of active galactic nuclei.

BERG T.A.M., ELLISON S.L., TUMLINSON J., OPPENHEIMER B.D., HORTON R., BORDOLOI R. and SCHAYE J.

Abstract (from CDS):

Active galactic nuclei (AGN) are thought to play a critical role in shaping galaxies, but their effect on the circumgalactic medium (CGM) is not well studied. We present results from the COS-AGN survey: 19 quasar sightlines that probe the CGM of 20 optically selected AGN host galaxies with impact parameters 80<ρimp<300 kpc. Absorption lines from a variety of species are measured and compared to a stellar mass and impact parameter matched sample of sightlines through non-AGN galaxies. Amongst the observed species in the COS-AGN sample (Ly α, C II, Si II, Si III, C IV, Si IV, N V), only Ly α shows a high covering fraction (94+6–23per cent for rest-frame equivalent widths EW>=124 mÅ) while many of the metal ions are not detected in individual sightlines. A sightline-by-sightline comparison between COS-AGN and the control sample yields no significant difference in EW distribution. However, stacked spectra of the COS-AGN and control samples show significant (>3σ) enhancements in the EW of both Ly α and Si III at impact parameters >164 kpc by a factor of +0.45 ± 0.05 and >+0.75 dex, respectively. The lack of detections of both high-ionization species near the AGN and strong kinematic offsets between the absorption systemic galaxy redshifts indicate that neither the AGN's ionization nor its outflows are the origin of these differences. Instead, we suggest that the observed differences could result from either AGN hosts residing in haloes with intrinsically distinct gas properties, or that their CGM has been affected by a previous event, such as a starburst, which may also have fuelled the nuclear activity.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: evolution - quasars: absorption lines - galaxies: Seyfert

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 19

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Number of rows : 19

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PB 8488 QSO 00 42 22.2910586608 -10 37 43.823652636   16.83 16.61     ~ 37 0
2 2MASS J01162298+1429408 Sy1 01 16 23.0523718481 +14 29 40.611942357   18.11 17.85     ~ 25 0
3 [VV2006] J084349.5+411741 QSO 08 43 49.4976449374 +41 17 41.598281988   17.66 17.41     ~ 36 1
4 QSO B0847+429 QSO 08 51 16.1419601093 +42 43 28.830016485   17.92 17.75     ~ 26 0
5 2MASS J08525922+0313207 Sy1 08 52 59.2208420603 +03 13 20.633305853   16.59 16.37     ~ 37 0
6 2MASS J08533423+4349023 Sy1 08 53 34.2441726669 +43 49 02.333804505   17.15 16.91     ~ 92 0
7 [VV2006] J094840.1+580038 QSO 09 48 40.0819686753 +58 00 39.206370457   18.93 18.80     ~ 19 0
8 Ton 576 Sy1 11 17 54.3258589805 +26 34 16.601128908   17.23 17.07     ~ 29 0
9 LB 10203 Sy1 11 27 36.3878313918 +26 54 50.571152960   17.0 17.0     ~ 36 0
10 QSO B1139+305 QSO 11 42 12.3216954429 +30 16 13.316800634   17.48 17.31     ~ 25 0
11 QSO J1155+2922 QSO 11 55 52.7986186273 +29 22 38.437056559   18.39 18.32     ~ 15 0
12 LBQS 1211+0841 QSO 12 14 30.5540199365 +08 25 08.128788272   17.26 17.17     ~ 35 0
13 QSO J1404+3353 QSO 14 04 28.2859862742 +33 53 42.642557370   18.68 18.59     ~ 22 0
14 QSO J1419+0606 QSO 14 19 49.3927892482 +06 06 53.970142973   17.68 17.57     ~ 23 0
15 QSO J1454+3046 QSO 14 54 24.3376140526 +30 46 58.387654973   18.63 18.51     ~ 14 0
16 2MASS J15364492+1412293 QSO 15 36 44.9063778850 +14 12 29.818074736   17.85 17.77     ~ 13 0
17 2MASS J16070989+1334190 Sy1 16 07 09.8857833114 +13 34 19.016700291   18.31 18.06     ~ 14 0
18 2MASS J21335790-0712173 Sy1 21 33 57.8911719551 -07 12 17.397125979   18.54 18.30     ~ 23 0
19 2MASX J23230004-0053588 Sy1 23 22 59.9924801303 -00 53 59.252360305   17.83 17.45     ~ 33 0

    Equat.    Gal    SGal    Ecl

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2021.06.25-02:56:57

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