J/ApJ/725/394 High-redshift Lyα emitters (Hu+, 2010)
An atlas of z = 5.7 and z = 6.5 Lyα emitters.
Hu E.M., Cowie L.L., Barger A.J., Capak P., Kakazu Y., Trouille L.
<Astrophys. J., 725, 394-423 (2010)>
=2010ApJ...725..394H 2010ApJ...725..394H
ADC_Keywords: Galaxies, spectra ; Redshifts ; Surveys ; Ultraviolet ;
Photometry, infrared
Keywords: cosmology: observations - galaxies: distances and redshifts -
galaxies: evolution - galaxies: formation - galaxies: high-redshift -
galaxies: luminosity function, mass function
Abstract:
We present an atlas of 88 z∼5.7 and 30 z∼6.5 Lyα emitters
obtained from a wide-field narrowband survey. We combined deep
narrowband imaging in 120Å bandpass filters centered at 8150Å
and 9140Å with deep BVRIz broadband imaging to select high-redshift
galaxy candidates over an area of 4180arcmin2. The goal was to
obtain a uniform selection of comparable depth over the seven targeted
fields in the two filters. For the GOODS-North region of the Hubble
Deep Field-North field, we also selected candidates using a 120Å
filter centered at 9210Å. We made spectroscopic observations with
Keck DEIMOS of nearly all the candidates to obtain the final sample of
Lyα emitters. At the 3.3Å resolution of the DEIMOS
observations the asymmetric profile for Lyα emission can be
clearly seen in the spectra of nearly all the galaxies. We show that
the spectral profiles are surprisingly similar for many of the
galaxies and that the composite spectral profiles are nearly identical
at z=5.7 and z=6.5.
Description:
Here we present the results of a wide-field, narrowband survey with
highly complete spectroscopic follow-up. We used the 34'x27'
field-of-view SuprimeCam mosaic CCD camera on the Subaru 8.2m
telescope to observe seven different target fields to search for
Lyα emitters at z∼5.7 (NB816) and z∼6.5 (NB912, NB921).
We have spectroscopically observed nearly all the photometrically
selected objects with the DEep Imaging Multi-Object Spectrograph
(DEIMOS) on the Keck II 10m telescope. We made the observations during
a number of runs in the 2005-2010 period, with a typical range of
∼5900-9700Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 81 88 z=5.7 Lyα emitters
table6.dat 81 27 z=6.5 Lyα emitters
table7.dat 75 3 z=6.5 Lyα emitters (GOODS-N)
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See also:
II/261 : GOODS initial results (Giavalisco+, 2004)
J/ApJ/711/928 : Low-redshift Lyα galaxies from GALEX (Cowie+, 2010)
J/A+A/498/13 : Lyman-α emitters from redshifts z∼2-3 (Nilsson+, 2009)
J/ApJS/176/301 : Subaru/XMM-Newton deep survey IV. (SXDS) (Ouchi+, 2008)
J/A+A/461/823 : Candidate Lyα emitting galaxies (Venemans+, 2007)
J/ApJ/671/1227 : Lyα galaxies at z∼4.5 (Dawson+, 2007)
J/ApJ/667/79 : Lyα emission-line galaxies at z=3.1 (Gronwall+, 2007)
J/ApJS/172/523 : COSMOS field Lyα emitters at z∼5.7 (Murayama+, 2007)
J/ApJ/668/853 : Spectroscopy of UltraStrong Emission Line galaxies (Kakazu+,
2007)
J/PASJ/58/313 : Lyα emitters in the SUBARU Deep Field (Shimasaku+, 2006)
J/ApJ/648/7 : LAEs at z=6.5 in Subaru Deep Field (Kashikawa+, 2006)
J/PASJ/57/165 : Lyα emitters in the SUBARU Deep Field (Taniguchi+, 2005)
Byte-by-byte Description of file: table5.dat table6.dat table7.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq Running sequence number
4- 5 A2 --- --- [HC]
6- 18 A13 --- [HCB2010] HC name (HHMMSS+DDMMSS; J2000); errors fixed
at CDS, see the "History" section below
20- 29 F10.6 deg RAdeg Right ascension in decimal degrees (J2000)
31- 41 F11.8 deg DEdeg Declination in decimal degrees (J2000)
43- 47 F5.2 mag Nmag Narrowband AB magnitude in the selection
filter (1)
49- 54 F6.2 mag Cmag Corresponding continuum AB magnitude (1)
56- 61 F6.4 --- z Spectroscopic redshift
63 I1 h Exp Exposure time
65 I1 --- q_z [1/3] Quality flag on z (1=secure) (2)
67- 70 F4.2 0.1nm FWHM Full width at half maximum of the line
72- 75 F4.2 0.1nm e_FWHM 1σ error on FWHM
77- 81 F5.2 [10-7W] logL ? Log of the luminosity in the line in erg/s
(not for table 7)
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Note (1): Filter characteristics:
* NB816 centered at λ=815nm, FWHM=12nm (table5, z∼5.7)
* NB912 centered at λ=914nm, FWHM=12nm (table6, z∼6.5)
* NB921 centered at λ=912nm, FWHM=12nm (table7, GOODS-N)
Note (2): Quality flag as follows:
1 = secure
2 = clear emission line but redshift may be more questionable
3 = weak emission line
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History:
* 07-Aug-2012: From electronic version of the journal
* 09-Dec-2012: HC names in the SSA22 fields were originally written
with a minus sign, but all sources of these fields have a positive
J2000 declination. The correction affects 48 sources: 36 sources
in table 5 and 12 in table6.
(End) Emmanuelle Perret [CDS] 07-Aug-2012