J/PASJ/57/165 Lyα emitters in the SUBARU Deep Field (Taniguchi+, 2005)
The SUBARU deep field project: Lyman-α emitters at a redshift of 6.6.
Taniguchi Y., Ajiki M., Nagao T., Shioya Y., Murayama T., Kashikawa N.,
Kodaira K., Kaifu N., Ando H., Karoji H., Akiyama M., Aoki K., Doi M.,
Fujita S.S., Furusawa H., Hayashino T., Iwamuro F., Iye M., Kobayashi N.,
Kodama T., Komiyama Y., Matsuda Y., Miyazaki S., Mizumoto Y., Morokuma T.,
Motohara K., Nariai K., Ohta K., Ohyama Y., Okamura S., Ouchi M.,
Sasaki T., Sato Y., Sekiguchi K., Shimasaku K., Tamura H., Umemura M.,
Yamada T., Yasuda N., Yoshida M.
<Publ. Astron. Soc. Jap., 57, 165-182 (2005)>
=2005PASJ...57..165T 2005PASJ...57..165T
ADC_Keywords: Surveys ; Photometry ; Redshifts ; Equivalent widths
Keywords: cosmology: observations - early universe - galaxies: formation -
galaxies: evolution - galaxies: starburst
Abstract:
We present new results of a deep optical imaging survey using a narrow
band filter (NB921) centered at λ=9196Å together with B, V,
R, i', and z' broadband filters in the sky area of the Subaru Deep
Field, which has been promoted as one of legacy programs of the 8.2m
Subaru Telescope. We obtained a photometric sample of 58 Lyα
emitter candidates at z∼6.5-6.6 among ∼180 strong NB921-excess
(z'-NB921>1.0) objects together with a color criterion of i'-z'>1.3.
We then obtained optical spectra of 20 objects in our NB921-excess
sample, and identified at least nine Lyα emitters at z∼6.5-6.6,
including the two emitters reported by Kodaira et al.
(2003PASJ...55L..17K 2003PASJ...55L..17K). Since our Lyα-emitter candidates are free
from strong amplification of gravitational lensing, we are able to
discuss their observational properties from a statistical point of
view. Based on these new results, we obtained a lower limit of the
star-formation rate density of
rhoSFR∼5.7x10-4h0.7M_☉/yr/Mpc3 at z∼6.6, being consistent
with our previous estimate. We discuss the nature of star-formation
activity in galaxies beyond z=6.
Description:
The data were collected in several observing runs during a period
between 2001 and 2003 with Suprime-Cam, on the 8.2m Subaru Telescope.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 67 58 Photometric properties of the Lyα emitters
(LAEs). The LAEs are not detected in B, V, and R.
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See also:
J/PASJ/57/881 : Imaging of high-redshift Lyman alpha emitters (Yamada+, 2005)
J/A+A/431/793 : Ly-alpha emitters around MRC 0316-257 (Venemans+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [TAN2005] Sequential number
4- 6 A3 --- --- [SDF]
8- 23 A16 --- SDF SDF designation (JHHMMSS.s+DDMMSS)
24 A1 --- n_SDF [S] S: LAE identified in Kodaira et al.
(2003PASJ...55L..17K 2003PASJ...55L..17K)
26 A1 --- l_i'mag Limit flag on i'mag
27- 31 F5.2 mag i'mag i' magnitude (AB mag in a 2" diameter)
32 A1 ---- u_i'mag [)] ): magnitude between the 1σ and
2σ detection levels
34 A1 --- l_z'mag Limit flag on z'mag
35- 39 F5.2 mag z'mag z' magnitude (AB mag in a 2" diameter)
40 A1 --- u_z'mag [)] ): magnitude between the 1σ and
2σ detection levels
42- 46 F5.2 mag NB921 NB921 magnitude (center=919.6nm, FWHM=13.2nm)
(AB magnitude in a 2" diameter)
48 A1 --- l_z9500 Limit flag on z9500
49- 53 F5.2 mag z9500 z9500 magnitude (AB mag in a 2" diameter) (1)
54 A1 --- u_z9500 [)] ): magnitude between the 1σ and
2σ detection levels
56 A1 --- l_EW Limit flag on EW
57- 59 I3 0.1nm EW Observed Lyα equivalent width
62- 66 F5.3 --- z ? Redshift
67 A1 --- u_z [)] Uncertainty flag on z
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Note (1): z9500 is a pure z'-band magnitude.
F(9500)=[960F(z')-92.4F(NB921)]/270, where
F(z') and F(NB921) are the observed z' and NB921 fluxes, respectively.
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Jun-2006