2015MNRAS.448.1335A

Query : 2015MNRAS.448.1335A

2015MNRAS.448.1335A - Mon. Not. R. Astron. Soc., 448, 1335-1344 (2015/April-1)

Discovery of an overdensity of Lyman alpha emitters around a z ∼ 4 QSO with the Large Binocular Telescope.

ADAMS S.M., MARTINI P., CROXALL K.V., OVERZIER R.A. and SILVERMAN J.D.

Abstract (from CDS):

Measurements of QSO clustering in the SDSS show that z > 4 QSOs are some of the most highly biased objects in the Universe. Their large correlation lengths of r0 ∼ 20h-1 Mpc are comparable to the most massive clusters of galaxies in the Universe today and suggest that these QSOs may mark the locations of massive cluster progenitors at high redshift. We report the discovery of an overdensity of Lyman-break galaxies (LBGs) around QSO SDSSJ 114514.18+394715.9 as part of our survey to identify LBGs around luminous z ∼ 4 QSOs. In this field three of the eight LBGs with secure redshifts are consistent with the redshift of the QSO. We find that the likelihood that this is merely an apparent overdensity due to the chance selection of field galaxies is only 0.02 percent, based on comparisons to simulations and our modelled selection efficiency. Overall, our survey finds 4 of the 15 LBGs with secure redshifts are consistent with the redshifts of their respective QSOs, which is consistent with luminous QSOs residing in larger haloes.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: clusters: general - galaxies: high-redshift - quasars: general - quasars: individual: SDSSJ 114514.18+394715.9 - large-scale structure of Universe

Nomenclature: Table 3: [AMC2015] LBG4 N (Nos LBG4 1 to LBG4 8), [AMC2015] LBG4E N (Nos LBG4E 1 to LBG4E 7). Table 4: [AMC2015] FILL NN (Nos 1-11).

Simbad objects: 37

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Number of rows : 37
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 [AMC2015] FILL 1 G 01 26 46.2 -00 38 58           ~ 1 0
2 [AMC2015] LBG4 1 EmG 01 26 47.2 -00 36 43           ~ 1 0
3 [AMC2015] FILL 3 G 01 26 50.7 -00 35 02           ~ 1 0
4 [AMC2015] LBG4E 1 EmG 01 26 53.8 -00 35 54           ~ 1 0
5 [AMC2015] FILL 4 G 01 26 54.1 -00 34 47           ~ 1 0
6 QSO J0127-0045 QSO 01 27 00.6906783576 -00 45 59.149137528   19.95 18.95     ~ 55 0
7 [AMC2015] FILL 2 G 01 27 03.3 -00 36 13           ~ 1 0
8 QSO J0244-0816 QSO 02 44 47.7940688688 -08 16 05.998665828   20.34 19.22     ~ 31 0
9 QSO J0949+0335 QSO 09 49 32.2676631768 +03 35 31.756872768   20.05 18.97     ~ 38 0
10 SDSS J095723.14+231849.4 QSO 09 57 23.1425607048 +23 18 49.437548028   20.45 19.44     ~ 16 0
11 QSO J0959+1312 QSO 09 59 37.1146924200 +13 12 15.467765616   19.65 18.55     ~ 49 0
12 [AMC2015] LBG4E 2 EmG 10 56 24.3 +19 10 35           ~ 1 0
13 [AMC2015] FILL 5 G 10 56 26.3 +19 11 36           ~ 1 0
14 [AMC2015] FILL 6 G 10 56 31.2 +19 10 02           ~ 1 0
15 [AMC2015] FILL 8 G 10 56 40.5 +19 12 13           ~ 1 0
16 [AMC2015] FILL 7 G 10 56 47.8 +19 11 09           ~ 1 0
17 SDSS J105705.37+191042.8 QSO 10 57 05.3733759528 +19 10 42.850923744   20.93 19.74     ~ 30 0
18 [AMC2015] LBG4E 4 EmG 11 44 28.4 +39 47 11           ~ 1 0
19 [AMC2015] LBG4 2 EmG 11 44 41.3 +39 47 06           ~ 1 0
20 [AMC2015] LBG4 4 EmG 11 44 43.7 +39 51 48           ~ 1 0
21 [AMC2015] LBG4E 3 EmG 11 44 43.8 +39 44 58           ~ 1 0
22 [AMC2015] LBG4 3 G 11 44 58.2 +39 50 45           ~ 1 0
23 SDSS J114514.18+394715.9 QSO 11 45 14.1837448944 +39 47 15.986576472   20.38 19.42     ~ 27 0
24 [AMC2015] FILL 9 G 11 45 29.6 +39 42 53           ~ 1 0
25 [AMC2015] LBG4 5 EmG 11 45 34.1 +39 56 58           ~ 1 0
26 [AMC2015] LBG4E 5 EmG 11 45 36.1 +39 56 28           ~ 1 0
27 [AMC2015] LBG4 6 EmG 11 45 42.2 +39 42 26           ~ 1 0
28 [AMC2015] FILL 10 G 11 45 48.1 +39 42 59           ~ 1 0
29 [AMC2015] LBG4E 7 EmG 12 19 54.6 +25 45 51           ~ 1 0
30 2MASS J12200081+2542306 QSO 12 20 00.8318285520 +25 42 30.657306132   20.17 19.09     ~ 21 0
31 [AMC2015] FILL 11 G 12 20 03.3 +25 46 03           ~ 1 0
32 [AMC2015] LBG4 8 EmG 12 20 07.2 +25 43 17           ~ 1 0
33 [AMC2015] LBG4E 6 EmG 12 20 12.4 +25 44 43           ~ 1 0
34 [AMC2015] LBG4 7 EmG 12 20 14.4 +25 44 50           ~ 1 0
35 NAME Subaru Deep Field NGP reg 13 24 21.3 +27 29 23           ~ 323 1
36 [DBC2004] M03 rG 13 38 26.05 -19 42 30.5       22.4   ~ 99 0
37 [VV2006] J152245.2+024543 QSO 15 22 45.1936929240 +02 45 43.826706396   20.85 19.83     ~ 31 0

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