2013AJ....145....4W

Query : 2013AJ....145....4W

2013AJ....145....4W - Astron. J., 145, 4 (2013/January-0)

An exponential decline at the bright end of the z = 6 galaxy luminosity function.

WILLOTT C.J., McLURE R.J., HIBON P., BIELBY R., McCRACKEN H.J., KNEIB J.-P., ILBERT O., BONFIELD D.G., BRUCE V.A. and JARVIS M.J.

Abstract (from CDS):

We present the results of a search for the most luminous star-forming galaxies at redshifts z ~ 6 based on Canada-France-Hawaii Telescope Legacy Survey data. We identify a sample of 40 Lyman break galaxies (LBGs) brighter than magnitude z' = 25.3 across an area of almost 4 deg2. Sensitive spectroscopic observations of seven galaxies provide redshifts for four, of which only two have moderate to strong Lyα emission lines. All four have clear continuum breaks in their spectra. Approximately half of the LBGs are spatially resolved in 0.7 arcsec seeing images, indicating larger sizes than lower luminosity galaxies discovered with the Hubble Space Telescope, possibly due to ongoing mergers. The stacked optical and infrared photometry is consistent with a galaxy model with stellar mass ∼1010 M☉. There is strong evidence for substantial dust reddening with a best-fit AV = 0.75 and AV> 0.48 at 2σ confidence, in contrast to the typical dust-free galaxies of lower luminosity at this epoch. The spatial extent and spectral energy distribution suggest that the most luminous z ~ 6 galaxies are undergoing merger-induced starbursts. The luminosity function of z = 5.9 star-forming galaxies is derived. This agrees well with previous work and shows strong evidence for an exponential decline at the bright end, indicating that the feedback processes that govern the shape of the bright end are occurring effectively at this epoch.

Abstract Copyright: ∼

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

Nomenclature: Fig. 1, Table 1: [WMH2013] NN (Nos 1-40). Fig 3, Table 2: [WMH2013] Serendip N=1.

Simbad objects: 45

goto Full paper

goto View the references in ADS

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 CFHQS J021627-045534 QSO 02 16 27.81000 -04 55 34.0997           ~ 27 0
2 [WMH2013] 1 G 02 24 13.79 -04 56 41.4           ~ 1 0
3 [WMH2013] 2 G 02 24 15.10 -04 20 47.0           ~ 1 0
4 [WMH2013] 3 G 02 24 51.14 -04 03 29.4           ~ 1 0
5 [WMH2013] 4 G 02 25 19.64 -04 28 06.8           ~ 1 0
6 [PNL2019] 191313 G 02 26 27.03 -04 52 38.3           ~ 33 0
7 [WMH2013] Serendip G 02 26 37.02 -04 55 20.4           ~ 2 0
8 [WMH2013] 6 G 02 27 18.77 -04 50 08.4           ~ 2 0
9 [WMH2013] 7 G 02 27 29.03 -04 33 04.3           ~ 1 0
10 VIDEO J022746.20-043032.37 G 02 27 46.20 -04 30 32.2           ~ 2 0
11 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1900 0
12 COSMOS2015 719040 G 09 58 45.49 +02 23 24.8           ~ 1 0
13 COSMOS2015 459096 G 09 58 59.84 +01 59 48.8           ~ 1 0
14 COSMOS2015 564593 G 09 59 44.49 +02 09 36.7     27.22 27.28 26.43 ~ 5 0
15 COSMOS2015 745776 G 09 59 52.74 +02 25 53.2           ~ 3 0
16 COSMOS2015 596366 EmG 09 59 56.54 +02 12 27.1         26.73 ~ 11 0
17 CANDELS COSMOS F160W J100019.93+022536.7 G 10 00 19.930 +02 25 36.81 27.30 27.61 26.97 27.46 26.04 ~ 9 0
18 CANDELS COSMOS F160W J100026.36+021346.7 G 10 00 26.37 +02 13 46.8           ~ 8 0
19 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 3639 0
20 CANDELS COSMOS F160W J100030.59+021935.1 EmG 10 00 30.58 +02 19 35.1           ~ 7 0
21 COSMOS2015 603236 G 10 00 50.10 +02 13 03.3           ~ 2 0
22 COSMOS2015 434843 G 10 00 59.82 +01 57 26.6           ~ 2 0
23 COSMOS2015 582392 G 10 01 18.99 +02 11 11.6           ~ 2 0
24 COSMOS2015 595674 G 10 01 21.54 +02 12 22.5           ~ 4 0
25 COSMOS2015 676176 G 10 01 21.94 +02 19 37.6           ~ 3 0
26 COSMOS2015 291568 G 10 01 38.37 +01 43 48.1           ~ 1 0
27 COSMOS2015 772822 G 10 01 38.71 +02 28 20.0           ~ 4 0
28 NAME Subaru Deep Field NGP reg 13 24 21.3 +27 29 23           ~ 330 1
29 [WMH2013] 24 G 14 16 20.38 +52 13 23.4           ~ 1 0
30 [WMH2013] 25 G 14 17 47.97 +52 38 09.4           ~ 1 0
31 [WMH2013] 26 G 14 18 10.47 +52 19 43.4           ~ 1 0
32 [WMH2013] 27 G 14 18 40.04 +52 35 08.2           ~ 1 0
33 [WMH2013] 28 G 14 18 52.23 +53 07 47.3           ~ 1 0
34 CANDELS EGS F160W J141920.5+525238.8 G 14 19 20.53 +52 52 38.7           ~ 4 0
35 [WMH2013] 30 G 14 20 40.80 +52 52 45.3           ~ 1 0
36 [WMH2013] 31 G 14 21 03.74 +52 12 16.2           ~ 1 0
37 [WMH2013] 32 G 22 13 42.68 -17 56 33.2           ~ 1 0
38 [WMH2013] 33 G 22 14 06.97 -17 37 59.7           ~ 1 0
39 [WMH2013] 34 G 22 14 46.63 -17 39 22.2           ~ 1 0
40 [WMH2013] 35 G 22 15 04.28 -17 57 20.5           ~ 1 0
41 [WMH2013] 36 G 22 15 48.91 -17 35 45.7           ~ 1 0
42 [WMH2013] 37 G 22 16 26.67 -18 04 45.0           ~ 1 0
43 [WMH2013] 38 G 22 16 38.04 -17 37 00.9           ~ 1 0
44 [WMH2013] 39 G 22 17 08.83 -17 38 43.9           ~ 1 0
45 [WMH2013] 40 G 22 17 13.55 -18 11 45.7           ~ 1 0

To bookmark this query, right click on this link: simbad:objects in 2013AJ....145....4W and select 'bookmark this link' or equivalent in the popup menu