2018MNRAS.474.4925S

Query : 2018MNRAS.474.4925S

2018MNRAS.474.4925S - Mon. Not. R. Astron. Soc., 474, 4925-4936 (2018/March-2)

Overdensity of galaxies in the environment of quasar pairs.

SANDRINELLI A., FALOMO R., TREVES A., SCARPA R. and USLENGHI M.

Abstract (from CDS):

We report on a study of the galaxy environments of low redshift physical quasars pairs. We selected 20 pairs having projected separation < 0.5 Mpc and difference of systemic velocity < 800 km s–1. Using Sloan Digital Sky Survey images, we evaluated the galaxy overdensity around these quasars in pairs and then compare it with that of a sample of isolated quasars with same redshift and luminosity. It is found that on average there is a systematic larger overdensity of galaxies around quasars in pairs with respect to that of isolated quasars. This may represent a significant link between nuclear activity and galaxy environment. However, at odds with that, the closest quasar pairs seem to inhabit poorer environments. Implications of present results and perspectives for future work are briefly discussed.

Abstract Copyright: © 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: active - galaxies: clusters: general - galaxies: groups: general - quasars: general

Nomenclature: Table 1: [SFT2018] QPNN (Nos 1 to 20).

Simbad objects: 72

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Number of rows : 72
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
2 SDSS J001103.18+005927.2 QSO 00 11 03.1858970880 +00 59 27.231342972   19.91 19.83     ~ 20 0
3 SDSS J001103.48+010032.6 QSO 00 11 03.485 +01 00 32.58           ~ 6 0
4 SDSS J011757.99+002104.1 QSO 01 17 57.9916886256 +00 21 04.107499560   20.12 20.04     ~ 23 0
6 [VV2006] J011758.8+002020 QSO 01 17 58.8368933424 +00 20 21.444292068   18.0 18.66 18.3   ~ 43 0
8 SDSS J015628.41+174957.6 QSO 01 56 28.41832 +17 49 57.7343           ~ 1 0
9 SDSS J015628.97+174940.2 Sy2 01 56 28.97149 +17 49 40.2373           ~ 4 0
10 SDSS J022610.98+003504.0 QSO 02 26 10.986 +00 35 04.00   20.81   20.10 19.66 ~ 7 0
12 SDSS J022612.41+003402.2 QSO 02 26 12.4170959520 +00 34 02.260260480   20.128 19.95 19.634 19.208 ~ 22 0
13 SDSS J023328.44-054604.4 QSO 02 33 28.4511314376 -05 46 04.558509084           ~ 17 0
15 SDSS J023331.05-054550.9 QSO 02 33 31.0514920104 -05 45 51.095995992           ~ 17 0
17 SDSS J074759.02+431805.4 Sy1 07 47 59.0254800456 +43 18 05.402676996   19.64 19.41     ~ 26 0
18 SDSS J074759.65+431811.5 Sy1 07 47 59.6630088864 +43 18 11.533271652   19.86 19.61     ~ 22 0
20 SDSS J074843.02+361258.7 QSO 07 48 43.0216689480 +36 12 58.699514088           ~ 11 0
21 SDSS J074843.12+361219.4 QSO 07 48 43.1250248208 +36 12 19.491363648   20.39 20.28     ~ 14 0
22 [VV2006] J082439.8+235720 QSO 08 24 39.8320402560 +23 57 20.368869084   18.77 18.75     ~ 23 1
24 [VV2006] J082440.6+235709 QSO 08 24 40.6149681864 +23 57 09.942094152   18.5 18.58 18.1   ~ 26 1
26 SDSS J084541.18+071050.3 Sy1 08 45 41.1885480288 +07 10 50.299843080   19.77 19.46     ~ 23 0
27 SDSS J084541.52+071152.3 QSO 08 45 41.5248083208 +07 11 52.297986732   19.02 18.98     ~ 22 0
28 SDSS J085625.62+511137.1 QSO 08 56 25.6362646320 +51 11 37.133907324   18.90 18.77     ~ 30 0
30 SDSS J085626.72+511117.8 Sy1 08 56 26.7176699256 +51 11 17.833225020   19.96 19.68     ~ 25 0
31 SDSS J091442.32+000637.1 Sy2 09 14 42.3165 +00 06 37.174   22.29 21.64     ~ 14 0
33 SDSS J091445.19+000648.7 QSO 09 14 45.1963726091 +00 06 48.781088669           ~ 3 0
34 SDSS J093847.45+462328.2 QSO 09 38 47.4462437640 +46 23 28.175600472           ~ 8 0
36 SDSS J093853.83+462310.8 QSO 09 38 53.8340410080 +46 23 10.786048872           ~ 9 0
37 SDSS J095137.01-004752.9 Sy1 09 51 37.011 -00 47 52.99           ~ 14 0
39 SDSS J095139.39-004828.7 QSO 09 51 39.3954299400 -00 48 28.750887576           ~ 9 0
40 SDSS J103834.84+595725.7 QSO 10 38 34.85943 +59 57 25.3690           ~ 1 0
42 SDSS J103840.56+595710.3 Sy1 10 38 40.5567226896 +59 57 10.412317620           ~ 12 0
44 2QZ J115240.0-003033 Sy1 11 52 40.0874520936 -00 30 32.875783200   20.24 20.11     ~ 12 0
45 [VV2006] J115240.5-003004 QSO 11 52 40.5209629344 -00 30 04.364569548   19.07 18.92     ~ 27 0
46 RX J1158.3+1235A QSO 11 58 22.7728960104 +12 35 18.638800152   19.99 19.83     ~ 5 0
47 RX J1158.3+1235 PaG 11 58 22.85677 +12 35 19.3193           ~ 2 0
48 RX J1158.3+1235B QSO 11 58 22.9792647024 +12 35 20.312150244   20.27 20.09     ~ 5 0
49 SDSS J121336.12+463355.8 QSO 12 13 36.12805 +46 33 55.7634           ~ 1 0
51 SDSS J121339.49+463319.6 Sy1 12 13 39.4992921336 +46 33 19.521840384   19.90 19.64     ~ 21 0
52 SDSS J124031.42+111848.9 Sy1 12 40 31.4182850712 +11 18 48.883236444           ~ 10 0
54 SDSS J124032.67+111959.2 QSO 12 40 32.677 +11 19 59.23           ~ 5 0
55 SDSS J124856.56+471827.7 QSO 12 48 56.5581235728 +47 18 27.799906932   19.67 19.26     ~ 17 1
57 SDSS J124903.34+471906.0 Sy1 12 49 03.3378993624 +47 19 06.081939768   19.57 19.16     ~ 24 1
58 SDSS J125454.86+084652.1 Sy1 12 54 54.8680730184 +08 46 52.107105180   19.44 19.22     ~ 16 0
59 WISE J125455.08+084653.8 IG 12 54 55.08442 +08 46 53.8544           ~ 4 0
60 SDSS J125455.09+084653.9 QSO 12 54 55.0947616632 +08 46 53.910023304   17.60 17.45     ~ 22 0
61 SDSS J133350.40-003309.2 QSO 13 33 50.4081114216 -00 33 09.213758280   20.02 19.93     ~ 4 0
63 SDSS J133351.16-003248.3 QSO 13 33 51.168 -00 32 48.33   20.88 20.68     ~ 4 0
64 SDSS J141855.41+244108.9 QSO 14 18 55.4171660304 +24 41 08.869567920   19.70 19.53     ~ 18 1
65 WISE J141855.46+244107.4 PaG 14 18 55.46900 +24 41 07.4495           ~ 2 0
66 SDSS J141855.53+244104.7 QSO 14 18 55.5368181960 +24 41 04.690671360   20.47 20.16     ~ 5 0
67 RX J1553.5+2229 PaG 15 53 30.0 +22 30 12           ~ 2 0
68 RX J1553.5+2229A QSO 15 53 30.2295282120 +22 30 10.109449476   18.76 18.59     ~ 18 0
69 RX J1553.5+2229B Sy1 15 53 30.5567384544 +22 30 14.299520688           ~ 11 1
70 NVSS J164311+315617 QSO 16 43 11.3392097627 +31 56 18.383807091   19.33 19.15     ~ 54 1
71 WISE J164311.36+315619.6 PaG 16 43 11.36936 +31 56 19.6319           ~ 2 0
72 SDSS J164311.38+315620.6 QSO 16 43 11.3844171219 +31 56 20.652750399           ~ 12 0

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