J/ApJ/759/133 z=2.4 Lyα emitters in the 53W002 field (Mawatari+, 2012)
Characterization of the distribution of the Lyα emitters in the 53W002
field at z = 2.4.
Mawatari K., Yamada T., Nakamura Y., Hayashino T., Matsuda Y.
<Astrophys. J., 759, 133 (2012)>
=2012ApJ...759..133M 2012ApJ...759..133M
ADC_Keywords: Redshifts ; Equivalent widths ; Galaxies, photometry
Keywords: cosmology: observations; galaxies: evolution; galaxies: formation;
large-scale structure of universe
Abstract:
We present the results of our wide-field narrowband imaging of the
field around the radio galaxy 53W002 at z=2.390 with
Subaru/Suprime-Cam. A custom-made filter, NB413, centered at 4140Å
with a width of 83Å is used to observe the 31'x24' area around the
radio galaxy. We detected 204 Lyα emitters (LAEs) at z=2.4 with
a rest-frame equivalent width larger than 25Å to the depth of 26 AB
mag (in NB413). The entire LAE population in the 53W002 field has an
average number density and distributions of equivalent width and size
that are similar to those of other fields at z∼2. We identify a
significant high-density region (53W002F-HDR) that spreads over
~5'x4' near 53W002, where the LAE number density is nearly four
times as large as the average of the entire field. Using the
probability distribution function of density fluctuation, we evaluate
the rareness probability of 53W002F-HDR to be 0.9+2.4-0.62%, which
corresponds to a moderately rich structure. No notable environmental
dependency at the comoving scale of 10Mpc is found for the
distributions of the Lyα equivalent width and luminosity in the
field. We also detected four Lyα blobs, one of which is newly
discovered. They are all located in the rims of high-density regions.
The biased location and unique morphologies in Lyα suggest that
galaxy interaction plays a key role in their formation.
Description:
In 2009 May 22-23 (UT), we carried out imaging observations of the
53W002 field, centered at RAJ2000=17:14:15.2,DEJ2000=50:15:49, using
the Suprime-Cam equipped on the 8.2m Subaru telescope. We used the
custom narrowband filter NB413, which has a central wavelength of
4140Å. We also used the B-band filter to estimate the continuum
flux.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 204 Properties of the Lyman-α emitters
in the 53W002 field
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See also:
B/subaru : Log of Subaru Prime Focus Camera Exposures (ADAC NAOJ, 2007)
J/A+A/561/A89 : Optical spectroscopy of 24 Ly-alpha emitters (Atek+, 2014)
J/ApJ/753/95 : LAE galaxies in the ECDF-S at z∼2.1 and z∼3.1 (Bond+, 2012)
J/ApJ/751/29 : Lyα profiles of LAEs at z=3.1 (Yamada+, 2012)
J/ApJ/744/110 : LAE galaxies between 2.1=<z≤3.1 (Ciardullo+, 2012)
J/ApJ/743/9 : z=3.1 LAEs morphological properties (Gronwall+, 2011)
J/ApJ/736/31 : HETDEX pilot survey. II. 1.9<z<3.8 LAEs (Blanc+, 2011)
J/A+A/498/13 : Lyman-α emitters from redshifts z∼2-3 (Nilsson+, 2009)
J/ApJ/705/639 : Sizes of Lyman alpha emitters at z=3.1 (Bond+, 2009)
J/ApJ/667/79 : Lyα emission-line galaxies at z=3.1 (Gronwall+, 2007)
J/PASJ/57/881 : Imaging of high-redshift Lyman alpha emitters (Yamada+, 2005)
J/PASJ/57/165 : LAEs in the SUBARU Deep Field (Taniguchi+, 2005)
J/MNRAS/312/442 : UV-selected galaxy redshift survey. II. (Sullivan+, 2000)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- LAE [1/204] 53W002F-LAE identifier number
(<[MYN2012] NNN> in Simbad)
5- 13 F9.5 deg RAdeg [258.1/259] Right ascension (J2000)
15- 22 F8.5 deg DEdeg [50/50.5] Declination (J2000)
24- 29 F6.1 0.1nm EW02 [25.4/7940] Rest-frame equivalent-width from
fixed 2" aperture photometry
31- 38 F8.2 0.1nm EW0K ? Rest-frame equivalent-width from Kron
photometry
39 A1 --- f_EW0K [i] i: infinite (1)
41- 46 F6.3 [10-7W] logLy2 [41.8/43.7] logLLyα from 2" aperture
48 A1 --- f_logLyK [N] N: NAN (1)
49- 54 F6.3 [10-7W] logLyK [41/44.1]? logLLyα from Kron photometry
56- 61 F6.4 arcmin-2 Dens [0.07/0.9] Local density (2)
63- 67 F5.3 --- z [2.3/2.4]? Spectroscopic redshift
69- 86 A18 --- Note Note about class (LAB=Lyman-α Blob (cloud))
88- 97 A10 --- Ref Reference(s) (3)
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Note (1): There are a few artificial values in this table. The EW0(Kron)
of 53W002F-LAE2 and LAE11 are replaced by "i" because our EW0
calculation gives the continuum fluxes of negative values for these
objects. For LAE198, the log LLyα (Kron) is described as "N"
since we obtained the negative LLyα (Kron).
Note (2): The local densities are estimated by smoothing the LAE number
density with a Gaussian kernel with σ=1.5".
Note (3): References as follows:
1 = Windhorst et al. 1991ApJ...380..362W 1991ApJ...380..362W
2 = Pascarelle et al. 1996ApJ...456L..21P 1996ApJ...456L..21P
3 = Pascarelle et al. 1996Natur.383...45P 1996Natur.383...45P
4 = Pascarelle et al. 1998AJ....116.2659P 1998AJ....116.2659P
5 = Keel et al. 1999AJ....118.2547K 1999AJ....118.2547K
6 = Smail et al. 2003ApJ...583..551S 2003ApJ...583..551S
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 15-Jul-2014