J/ApJ/903/4 260 Lyα Emitters at Redshift z∼5.7 with M2FS (Ning+, 2020)
The Magellan M2FS Spectroscopic Survey of High-redshift Galaxies:
A Sample of 260 Lyα Emitters at Redshift z∼5.7.
Ning Y., Jiang L., Zheng Z.-Y., Wu J., Bian F., Egami E., Fan X., Ho
L.C., Shen Y., Wang R., Wu X.-B.
<Astrophys. J., 903, 4 (2020)>
=2020ApJ...903....4N 2020ApJ...903....4N
ADC_Keywords: Galaxies; Redshifts; Spectra, infrared
Keywords: High-redshift galaxies ; Lyman-alpha galaxies ; Galaxy properties
Abstract:
We present a spectroscopic survey of Lyα emitters (LAEs) at
z∼5.7 using the multiobject spectrograph M2FS on the Magellan Clay
telescope. This is part of a high-redshift galaxy survey carried out
in several well-studied deep fields. These fields have deep images in
multiple UV/optical bands, including a narrow NB816 band that has
allowed an efficient selection of LAE candidates at z∼5.7. Our sample
consists of 260 LAEs and covers a total effective area of more than
2deg2 on the sky. This is so far the largest (spectroscopically
confirmed) sample of LAEs at this redshift. We use the secure
redshifts and narrowband photometry to measure Lyα luminosities.
We find that these LAEs span a Lyα luminosity range of
∼2x1042-5x1043erg/s and include some of the most luminous galaxies
known at z≥5.7 in terms of Lyα luminosity. Most of them have
rest-frame equivalent widths between 20 and 300Å, and more luminous
Lyα emission lines tend to have broader line widths. We detect a
clear offset of ∼20Å between the observed Lyα wavelength
distribution and the NB816 filter transmission curve, which can be
explained by the intergalactic medium absorption of continua blueward
of Lyα in the high-redshift spectra. This sample is being used
to study the Lyα luminosity function and galaxy properties at
z∼5.7.
Description:
In this paper, we present a spectroscopic sample of 260 Lyα
Emitters (LAEs) at z∼5.7 in five well-studied deep fields. This is
part of our spectroscopic survey of high-redshift galaxies using the
multiobject spectrograph, the Michigan/Magellan Fiber System (M2FS),
on the 6.5m Magellan Clay telescope in 2015-2018. The wavelength
coverage was roughly from 7600 to 9600Å. We binned pixels (2x2)
during our observations, and the spectral dispersion was ∼1Å per
pixel.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 89 260 A sample of 260 LAEs at redshift 5.7
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See also:
J/ApJ/744/110 : LAE galaxies between 2.1=<z≤3.1 (Ciardullo+, 2012)
J/ApJ/753/95 : LAE galaxies in the ECDF-S at z∼2.1 and z∼3.1 (Bond+, 2012)
J/ApJ/760/128 : Lyα emission from 4<z<6 sources COSMOS (Mallery+, 2012)
J/ApJ/769/54 : Spectroscopy of Damped Lyα systems (Neeleman+, 2013)
J/A+A/561/A89 : Optical spectroscopy of 24 Ly-alpha emitters (Atek+, 2014)
J/ApJ/783/119 : z∼1 Lyα emitters I 135 candidates GALEX (Wold+, 2014)
J/ApJ/796/64 : Hβ & Lyα emitting galaxies z∼2 (Ciardullo+, 2014)
J/ApJ/815/57 : Follow-up spectroscopy of Lyα 3<z<7 emitters (U+, 2015)
J/MNRAS/468/1123 : LAE among star-forming galaxies at z=2.5 (Shimakawa+, 2017)
J/MNRAS/471/267 : Lyα fluxes of HDFS 2.91<z<6.64 sources (Drake+, 2017)
J/MNRAS/472/772 : Candidate LAEs at z=5.7 and z=6.6 (Matthee+, 2017)
J/ApJ/852/22 : Lyα forest power spectrum 1.8≤z≤3.4 (Walther+, 2018)
J/ApJ/859/53 : Lyα candidates from MUSE survey of 6AGNs (Marino+, 2018)
J/MNRAS/473/30 : Catalog of Lyα emitters (Caruana+, 2018)
J/MNRAS/477/2817 : Luminous Lyα emitters at z∼2-3 (Sobral+, 2018)
J/A+A/634/A97 : VUDS UV and Lyα luminosity functions (Khusanova+, 2020)
J/A+A/643/A149 : J-PLUS Lyα-emitting candidates (Spinoso+, 2020)
J/MNRAS/504/3662 : Lya-UV Offsets in Galaxies at z∼6 (Lemaux+, 2021)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Num [1/260] Number identifier
5- 6 I2 h RAh [2/22] Hour of Right Ascension (J2000)
8- 9 I2 min RAm Minute of Right Ascension (J2000)
11- 15 F5.2 s RAs Second of Right Ascension (J2000)
17 A1 --- DE- [±] Sign of Declination (J2000)
18- 19 I2 deg DEd Degree of Declination (J2000)
21- 22 I2 arcmin DEm Arcminute of Declination (J2000)
24- 27 F4.1 arcsec DEs Arcsecond of Declination (J2000)
29- 33 F5.3 --- z [5.62/5.76] Spectroscopic redshift (1)
35 A1 --- l_imag Upper limit flag on imag (2)
36- 40 F5.2 mag imag [25.1/28.5] Apparent i-band magnitude
42- 45 F4.2 mag e_imag [0.04/0.6]? Uncertainty in imag
47 A1 --- l_z'mag Upper limit flag on z'mag (2)
48- 52 F5.2 mag z'mag [24.57/27.7] Apparent z'-band magnitude
54- 57 F4.2 mag e_z'mag [0.05/0.6]? Uncertainty in z'mag
59- 63 F5.2 mag NB816 [23.48/25.97] Apparent NB816 band magnitude
65- 68 F4.2 mag e_NB816 [0.01/0.3] Uncertainty in NB816
70- 73 F4.2 10+36W L(Lya) [0.11/4.37] Lyman-alpha luminosity; 1e43erg/s
75- 78 F4.2 10+36W e_L(Lya) [0.02/0.8] Uncertainty in L(Lya)
80- 89 A10 --- ID ID in the M2FS survey
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Note (1): The redshift errors are smaller than 0.001.
Note (2): The upper limits indicate 2σ detections.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 25-Jan-2022