2015ApJ...799...38K

Query : 2015ApJ...799...38K

2015ApJ...799...38K - Astrophys. J., 799, 38 (2015/January-3)

NIR spectroscopic observation of massive galaxies in the protocluster at z = 3.09.

KUBO M., YAMADA T., ICHIKAWA T., KAJISAWA M., MATSUDA Y. and TANAKA I.

Abstract (from CDS):

We present the results of near-infrared spectroscopic observations of the K-band-selected candidate galaxies in the protocluster at z = 3.09 in the SSA22 field. We observed 67 candidates with KAB< 24 and confirmed redshifts of the 39 galaxies at 2.0 < zspec< 3.4. Of the 67 candidates, 24 are certainly protocluster members with 3.04 ≤ zspec ≤ 3.12, which are massive red galaxies that have been unidentified in previous optical observations of the SSA22 protocluster. Many distant red galaxies (J - KAB> 1.4), hyper extremely red objects (J - KAB> 2.1), Spitzer MIPS 24 µm sources, active galactic nuclei (AGNs) as well as the counterparts of Lyα blobs and the AzTEC/ASTE 1.1 mm sources in the SSA22 field are also found to be protocluster members. The mass of the SSA22 protocluster is estimated to be ∼2-5x1014 M☉, and this system is plausibly a progenitor of the most massive clusters of galaxies in the current universe. The reddest (J - KAB ≥ 2.4) protocluster galaxies are massive galaxies with Mstar∼ 1011 M☉ showing quiescent star formation activities and plausibly dominated by old stellar populations. Most of these massive quiescent galaxies host moderately luminous AGNs detected by X-ray. There are no significant differences in the [O III] λ5007/Hβ emission line ratios and [O III] λ5007 line widths and spatial extents of the protocluster galaxies from those of massive galaxies at z ∼ 2-3 in the general field.

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Journal keyword(s): cosmology: observations - galaxies: clusters: general - galaxies: evolution - galaxies: formation - galaxies: high-redshift

Nomenclature: Table 3: [KYI2015] JHHMMSS.s+DDMMSS.s N=39.

Simbad objects: 45

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Number of rows : 45
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
1 [YMK2012] LAE J221715.7+001906 EmG 22 17 15.70 +00 19 06.2           ~ 2 0
2 [KYI2015] J221716.4+001718.6 G 22 17 16.40 +00 17 18.6           ~ 1 0
3 [KYI2015] J221718.0+001735.6 G 22 17 18.00 +00 17 35.6           ~ 1 0
4 [KYI2015] J221719.4+001657.1 G 22 17 19.40 +00 16 57.1           ~ 1 0
5 [KYI2015] J221720.8+001831.0 G 22 17 20.80 +00 18 31.0           ~ 3 0
6 [KYI2015] J221721.9+001755.5 G 22 17 21.90 +00 17 55.5           ~ 1 0
7 CXOU J221722.3+001640 QSO 22 17 22.273 +00 16 40.02   22.3424 21.0452 21.0689 20.8965 ~ 27 0
8 [KYI2015] J221724.3+001945.1 G 22 17 24.30 +00 19 45.1           ~ 1 0
9 [KYI2015] J221724.6+001836.5 G 22 17 24.60 +00 18 36.5           ~ 1 0
10 [MYH2004] LAB 35 EmG 22 17 24.79 +00 17 17.4       25.51   ~ 19 0
11 [AMH2017] VLA-LAB16 EmG 22 17 24.80 +00 11 16.8       27.00   ~ 17 0
12 [KYI2015] J221724.8+001803.7 G 22 17 24.80 +00 18 03.7           ~ 1 0
13 [KYI2015] J221725.2+001805.7 G 22 17 25.20 +00 18 05.7           ~ 1 0
14 [MII2017b] AGN9 AGN 22 17 25.40 +00 17 16.8     26.267 25.907   ~ 8 0
15 [SCB2004] SMM J221725.70+001238.5 G 22 17 25.70 +00 12 38.7         23.30 ~ 5 0
16 NAME SMM J221726+0013 EmO 22 17 25.97 +00 12 38.9   27   24.49   ~ 112 0
17 [AMH2017] VLA-LAB1b PoG 22 17 26.10 +00 12 32.3       24.58   ~ 12 0
18 [KYI2015] J221726.3+001957.2 G 22 17 26.30 +00 19 57.2           ~ 1 0
19 [KYI2015] J221727.0+001746.4 G 22 17 27.00 +00 17 46.4           ~ 1 0
20 [SAD98] SSA 22a MD31 G 22 17 27.30 +00 18 09.5   24.33 23.60 23.56   ~ 14 0
21 [YMK2012] LAE J221727.8+001737 EmG 22 17 27.78 +00 17 36.9       27.00   ~ 5 0
22 [KYI2015] J221728.3+001954.4 LSB 22 17 28.30 +00 19 54.4       24.4   ~ 2 0
23 [KYI2015] J221728.5+001807.4 G 22 17 28.50 +00 18 07.4           ~ 1 0
24 [KYI2015] J221728.5+001822.2 G 22 17 28.50 +00 18 22.2           ~ 1 0
25 [KYI2015] J221729.6+001918.6 G 22 17 29.60 +00 19 18.6           ~ 1 0
26 [KYI2015] J221729.7+001715.2 G 22 17 29.70 +00 17 15.2           ~ 1 0
27 [KYI2015] J221730.2+001120.7 G 22 17 30.20 +00 11 20.7           ~ 1 0
28 SAS-LBG SSA22a-M28 EmG 22 17 31.69 +00 16 57.6       24.75   ~ 25 0
29 [NSS2011] 23 EmG 22 17 31.73 +00 16 06.9       24.91   ~ 4 0
30 [UTK2017] ADF22.12 G 22 17 32.00 +00 16 55.5           ~ 9 0
31 [KYI2015] J221732.2+001502.3 G 22 17 32.20 +00 15 02.3           ~ 2 0
32 SAS-LBG SSA22a-D3 EmG 22 17 32.40 +00 11 34.1       23.92   ~ 37 0
33 [KYI2015] J221732.5+001131.2 G 22 17 32.50 +00 11 31.2           ~ 2 0
34 [KYI2015] J221732.5+001132.8 G 22 17 32.50 +00 11 32.8           ~ 2 0
35 [KYI2015] J221733.9+001106.5 G 22 17 33.90 +00 11 06.5           ~ 1 0
36 NAME SSA22 Protocluster PCG 22 17 34.0 +00 17 01           ~ 175 0
37 SSA 22 reg 22 17 34.7 +00 15 07           ~ 351 0
38 [KYI2015] J221734.9+001911.8 G 22 17 34.90 +00 19 11.8           ~ 1 0
39 ALMA J221736.54+001622.7 QSO 22 17 36.538 +00 16 22.56 23.9106 22.4187 21.6993 21.3836 21.3640 ~ 32 0
40 [UTK2017] ADF22.16 G 22 17 36.80 +00 18 18.2           ~ 13 0
41 SDSS J221737.02+001820.1 G 22 17 37.025 +00 18 20.17   23.92 23.77 23.45   ~ 5 0
42 [UTK2017] ADF22.8 G 22 17 37.10 +00 17 12.4           ~ 7 0
43 [KYI2015] J221737.3+001816.0 G 22 17 37.30 +00 18 16.0           ~ 9 0
44 [UTK2014] SSA22-Az14c G 22 17 37.30 +00 18 23.2   27.28 26.77 26.57   ~ 9 0
45 [NSS2011] 20 EmG 22 17 37.33 +00 16 31.4       25.45   ~ 4 0

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