J/ApJS/176/301 Subaru/XMM-Newton deep survey IV. (SXDS) (Ouchi+, 2008)
The Subaru/XMM-Newton deep survey (SXDS).
IV. Evolution of Lyα emitters from z=3.1 to 5.7 in the 1 deg2 field:
luminosity functions and AGN.
Ouchi M., Shimasaku K., Akiyama M., Simpson C., Saito T., Ueda Y.,
Furusawa H., Sekiguchi K., Yamada T., Kodama T., Kashikawa N., Okamura S.,
Iye M., Takata T., Yoshida M., Yoshida M.
<Astrophys. J. Suppl. Ser., 176, 301-330 (2008)>
=2008ApJS..176..301O 2008ApJS..176..301O
ADC_Keywords: Redshifts ; Photometry ; Equivalent widths
Keywords: cosmology: observations - galaxies: formation
galaxies: high-redshift
Abstract:
We present luminosity functions (LFs) and various properties of
Lyα emitters (LAEs) at z=3.1, 3.7, and 5.7, in a 1deg2 sky
of the Subaru/XMM-Newton Deep Survey (SXDS) Field. We obtain a
photometric sample of 858 LAE candidates based on deep Subaru
Suprime-Cam imaging data and a spectroscopic sample of 84 confirmed
LAEs from Subaru FOCAS and VLT VIMOS spectroscopy in a survey volume
of ∼106Mpc3 with a limiting Lyα luminosity of
∼3x1042ergs/s. We derive the LFs of the Lyα and UV continuum
(∼1500Å) for each redshift, taking into account the statistical
error and the field-to-field variation. We identify six LAEs with AGN
activities from our spectra combined with VLA, Spitzer, and XMM-Newton
data. Among the photometrically selected LAEs at z=3.1 and 3.7,
only ∼1% show AGN activities, while the brightest LAEs with
logL(Lyα)≳43.4-43.6ergs/s appear to always host AGNs.
Our LAEs are bluer in UV-continuum color than dropout galaxies,
suggesting lower extinction and/or younger stellar populations.
Description:
We carried out narrowband imaging with Subaru/Suprime-Cam on seven
nights during 2003 September 28-30, October 22-24, and 26.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 125 84 Lyα emitters with spectroscopic redshifts
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See also:
J/ApJ/648/7 : Lyα emitters at z=6.5 in Subaru DF (Kashikawa+, 2007)
J/MNRAS/381/1369 : Redshifts in Subaru/XMM Deep Field (Geach+, 2007)
J/PASJ/58/313 : Lyα emitters in SUBARU Deep Field (Shimasaku+, 2006)
J/PASJ/57/165 : Lyα emitters in SUBARU Deep Field (Taniguchi+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- [OSA2008] Name (NBNNN-A-NNNNNN)
16- 18 F3.1 --- zgr Redshift group (3.1, 3.7, or 5.7)
20- 21 I2 h RAh Hour of right ascension (J2000)
23- 24 I2 min RAm Minute of right ascension (J2000)
26- 31 F6.3 s RAs Second of right ascension (J2000)
33 A1 --- DE- Declination sign (J2000)
34- 35 I2 deg DEd Degree of declination (J2000)
37- 38 I2 arcmin DEm Arcminute of declination (J2000)
40- 44 F5.2 arcsec DEs Arcsecond of declination (J2000)
46- 50 F5.3 --- z Redshift
51 A1 --- u_z [u] uncertain spectroscopic identification
53- 56 F4.1 mag NBmag Narrow Band magnitude (1)
58 A1 --- l_BBmag Limit flag on Broad Band magnitude
59- 62 F4.1 mag BBmag Broad band magnitude (B, V, R, i' or z')
64- 65 A2 --- l_NBs [≲ ] Limit flag on SNB
66- 68 F3.1 kpc NBs ?=- Half of FWHMs in the narrow band
69 A1 --- f_NBs [c] confusion flag (2)
71- 72 A2 --- l_BBs [≲ ] Limit flag on SBB
73- 76 F4.1 kpc BBs ?=- Half of FWHMs in the broad band
77 A1 --- f_BBs [c] confusion flag (2)
79- 83 F5.1 10+35W L(Lya) Lyα luminosity
85- 88 F4.1 10+35W e_L(Lya) Error on Lyα luminosity
90- 94 F5.1 0.1nm EW Rest-frame apparent Equivalent Width of
Lyα emission line
96-101 F6.1 0.1nm E_EW Positive error on EW
103-107 F5.1 0.1nm e_EW Negative error on EW
109-113 F5.1 mag UVMAG UV absolute magnitude (see section 5.2)
115-119 F5.1 solMass/yr SFR Star Formation Rate estimated from the UV
total magnitude
120 A1 --- u_SFR [:] SFR is a formal estimation for
AGNs or confused objects
122-124 A3 --- Note AGN Classification and note
125 A1 --- f_Note [b] Object has a marginal CIV detection,
NB503-N-42377, see section 4.1
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Note (1): Narrow bands are, respectively, NB503, NB570 and NB816
for z=3.1, 3.7 and 5.7 LAEs; central wavelengths and
Δλ are respectively, in Å:
(5029,74), (5703,69) and (8150,120)0
Note (2): "c" indicates sources confused by neighboring object(s),
which do not give an accurate FWHM (Full Width at Half Maximum).
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History:
From electronic version of the journal
References:
Sekiguchi et al., Paper I. 2004AAS...205.8105S 2004AAS...205.8105S
Furusawa et al., Paper II. 2008ApJS..176....1F 2008ApJS..176....1F
Ueda et al., Paper III. 2008ApJS..179..124U 2008ApJS..179..124U, Cat. J/ApJS/179/124
Morokuma et al., Paper V. 2008ApJ...676..163M 2008ApJ...676..163M
Morokuma et al., Paper VI. 2008ApJ...676..121M 2008ApJ...676..121M
Yoshida et al., Paper VII. 2008ApJ...679..269Y 2008ApJ...679..269Y
(End) Emmanuelle Perret [CDS] 09-Jul-2009