J/ApJS/172/523 COSMOS field Lyα emitters at z∼5.7 (Murayama+, 2007)
Lyα emitters at redshift 5.7 in the COSMOS field.
Murayama T., Taniguchi Y., Scoville N.Z., Ajiki M., Sanders D.B.,
Mobasher B., Aussel H., Capak P., Koekemoer A., Shioya Y., Nagao T.,
Carilli C., Ellis R.S., Garilli B., Giavalisco M., Kitzbichler M.G.,
Le Fevre O., Maccagni D., Schinnerer E., Smolcic V., Tribiano S.,
Cimatti A., Komiyama Y., Miyazaki S., Sasaki S.S., Koda J., Karoji H.
<Astrophys. J. Suppl. Ser., 172, 523-544 (2007)>
=2007ApJS..172..523M 2007ApJS..172..523M
ADC_Keywords: Surveys ; Redshifts ; Equivalent widths ; Photometry, SDSS
Keywords: cosmology: observations - cosmology: early Universe -
galaxies: evolution - galaxies: formation
Abstract:
We present results from a narrow-band optical survey of a contiguous
area of 1.95deg2, covered by the Cosmic Evolution Survey (COSMOS).
Both optical narrow-band (λc=8150Å and
δλ=120Å) and broad-band (B, V, g', r', i', and z')
imaging observations were performed with the Subaru prime-focus
camera, Suprime-Cam on the Subaru Telescope. We provide the largest
contiguous narrow-band survey, targeting Lyα emitters (LAEs) at
z∼5.7. We find a total of 119 LAE candidates at z∼5.7. Over the
wide-area covered by this survey, we find no strong evidence for
large-scale clustering of LAEs. We estimate a star formation rate
(SFR) density of ∼7x10-4M☉/yr/Mpc3 for LAEs at z∼5.7 and
compare it with previous measurements.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 119 Photometric properties of the Lymanα
emitters (LAE) candidates at z∼5.7
table2.dat 64 119 Lyα luminosity and star formation rate
for the LAE candidates at z∼5.7
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See also:
II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007)
J/ApJS/172/456 : [OII] emitting gal. in COSMOS + SDF fields (Takahashi+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [MTS2007] Sequential number
4 A1 --- n_[MTS2007] [*] * for statistical sample
6- 13 F8.4 deg RAdeg Right ascension in decimal degrees (J2000)
15- 21 F7.4 deg DEdeg Declination in decimal degrees (J2000)
23- 26 F4.1 mag i'mag i' band 2" aperture magnitude
28- 31 F4.1 mag NB816 ?=99.0 NB816 band 2" aperture magnitude (2)
33- 36 F4.1 mag z'mag ?=99.0 z' band 2" aperture magnitude (2)
38- 41 F4.1 mag izmag ?=99.0 Wavelength-matched "iz" continuum
2" aperture magnitude (2) (3)
43- 46 F4.1 mag NB816a NB816 band 3" aperture magnitude
48- 51 F4.1 mag z'mag3 ?=99.0 z' band 3" aperture magnitude (2)
53- 56 F4.1 10-7Jy F(NB816) Flux density in the NB816 band,
3" aperture (3)
58- 60 F3.1 10-7Jy e_F(NB816) rms uncertainty on F(NB816) (G1)
62 A1 --- l_F(z') Limit flag on F(z') (G1)
63- 66 F4.1 10-7Jy F(z') Flux density in the z' band,
3" aperture (3)
68- 70 F3.1 10-7Jy e_F(z') ? rms uncertainty on F(z') (G1)
72- 74 F3.1 10-20W/m2 F(em) Emission line fluxes estimated from NB816
and z' flux densities in 3" aperture
76- 78 F3.1 10-20W/m2 e_F(em) rms uncertainty on F(em) (G1)
80 A1 --- l_EW Limit flag on EW (G1)
81- 84 I4 0.1nm EW Observed observed equivalent width
estimated from NB816 and Z' flux
densities in 3" aperture
86- 88 I3 0.1nm e_EW ? rms uncertainty on EW (G1)
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Note (2): AB magnitude. An entry of "99.0" indicates that no excess flux
was measured. All of our LAE candidates are undetected in the B-, g'-,
V-, r'-band data.
Note (3): Using the following linear combination (in 10-30erg/cm2/s/Hz):
fiz=0.57fi+0.43fz' where fi and fz' are the
i (i' or i*) and z' flux densities, respectively.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- [MTS2007] Sequential number
4 A1 --- n_[MTS2007] [*] * for statistical sample
6 A1 --- l_EW(Lya) Limit flag on EW(Lya) (G1)
7- 9 I3 0.1nm EW(Lya) Lymanα equivalent width
11- 13 I3 0.1nm e_EW(Lya) ? rms uncertainty on EW(Lya) (G1)
15- 18 F4.1 10+35W L(Lya) Lymanα luminosity (10+42erg/s)
20- 22 F3.1 10+35W e_L(Lya) rms uncertainty on L(Lya) (G1)
24- 27 F4.1 solMass/yr SFR(Lya) Lymanα Stellar Formation Rate
29- 31 F3.1 solMass/yr e_SFR(Lya) rms uncertainty on SFR(Lya) (G1)
33 A1 --- l_L(UV) Limit flag on L(UV) (G1)
34- 37 F4.1 10+21W/Hz L(UV) Luminosity of UV continuum at 1270Å
39- 41 F3.1 10+21W/Hz e_L(UV) ? rms uncertainty on L(UV) (G1)
43 A1 --- l_SFR(UV) Limit flag on SFR(UV) (G1)
44- 47 F4.1 solMass/yr SFR(UV) UV Stellar Formation Rate
49- 52 F4.1 solMass/yr e_SFR(UV) ? rms uncertainty on SFR(UV) (G1)
54 A1 --- l_R(SFR) Limit flag on R(SFR) (G1)
55- 59 F5.2 --- R(SFR) SFR(Lya)/SFR(UV) SFR ratio
61- 64 F4.2 --- e_R(SFR) ? rms uncertainty on R(SFR) (G1)
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Global notes:
Note (G1): Errors and lower-limits represent 1σ significance
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 23-Mar-2008