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
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). 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:
FileName Lrecl Records Explanations
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.
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
Bytes Format Units Label Explanations
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) 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
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.
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Jun-2006
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