2017MNRAS.469.2646C

Query : 2017MNRAS.469.2646C

2017MNRAS.469.2646C - Mon. Not. R. Astron. Soc., 469, 2646-2661 (2017/August-2)

Gran Telescopio Canarias observations of an overdense region of Lyman α emitters at z = 6.5.

CHANCHAIWORAWIT K., GUZMAN R., RODRIGUEZ ESPINOSA J.M., CASTRO-RODRIGUEZ N., SALVADOR-SOLE E., CALVI R., GALLEGO J., HERRERO A., MANRIQUE A., MARIN-FRANCH A., MAS-HESSE J.M., ARETXAGA I., CARRASCO E., TERLEVICH E. and TERLEVICH R.

Abstract (from CDS):

We present the results of our search near the end of the Reionization Epoch for faint galaxies. This has been done using very deep OSIRIS images obtained at the Gran Telescopio Canarias (GTC). Our observations focus around two close, massive Lyman α emitters (LAEs) at redshift 6.5, discovered in the SXDS field within a large-scale overdense region. The total GTC observing time in three medium band filters (F883w35, F913w25 and F941w33) is over 34 h covering 7.0 x 8.5 arcmin2 (or ∼30 000 Mpc3 at z = 6.5). In addition to the two spectroscopically confirmed LAEs in the field, we have identified 45 other LAE candidates. The preliminary luminosity function derived from our observations, assuming a spectroscopic confirmation success rate of 2/3 as in previous surveys, suggests this area is about 2 times denser than the general field galaxy population at z = 6.5. If confirmed spectroscopically, our results will imply the discovery of one of the earliest protoclusters in the Universe, which will evolve to resemble the most massive galaxy clusters today.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: distances and redshifts - galaxies: high-redshift - dark ages, reionization, first stars - early Universe - large-scale structure of Universe - cosmology: observations - cosmology: observations

Nomenclature: Table 2: [CGR2017] LAE-C-N-NN (Nos 1-01 to 1-15, 2-16 to 2-47).

Simbad objects: 10

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Number of rows : 10
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 EGGR 382 PM* 00 33 54.4629362352 -12 07 58.775300904 15.511 15.572 14.891 14.467 14.051 DC? 103 0
2 HSCS J021823-043524 EmG 02 18 23.5317 -04 35 24.193           ~ 5 0
3 HSCS J021827-043507 EmG 02 18 27.0289 -04 35 08.216           ~ 9 0
4 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
5 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 731 0
6 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
7 NAME Subaru Deep Field NGP reg 13 24 21.3 +27 29 23           ~ 330 1
8 Ross 640 WD* 16 28 25.0030896166 +36 46 15.846877416   14.01   13.9   DZ6 220 0
9 G 24-9 WD* 20 13 55.6788159161 +06 42 44.827736377 15.733 16.176 15.751 15.476 15.248 DC7 107 0
10 Feige 110 HS* 23 19 58.3996844256 -05 09 56.171142864 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 673 1

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