J/ApJ/902/137ivo://CDS.VizieR/J/ApJ/902/137doi:10.26093/cds/vizier.19020137CDSGuo Y.Jiang L.Egami E.Ning Y.Zheng Z.-Y.Ho L.C.2023-08-16T15:28:28Z2022-05-12T09:30:53ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxiesspectroscopyredshiftedsurveysultraviolet-astronomyvisible-astronomybroad-band-photometryWe present a spectroscopic survey of Ly{alpha} emitters (LAEs) at z~3.1 in the Subaru XMM-Newton Deep Survey Field. This field has deep imaging data in a series of broad and narrow bands, including two adjacent narrow bands NB497 and NB503 that have allowed us to efficiently select LAE candidates at z~3.1. Using spectroscopic observations on MMT Hectospec and Magellan M2FS, we obtained a sample of 166 LAEs at z~3.1 over an effective area of ~1.2deg^2^, including 16 previously known LAEs. This is so far the largest (spectroscopically confirmed) sample of LAEs at this redshift. We make use of the secure redshifts and multiband data to measure spectral properties such as Ly{alpha} luminosity and rest-frame UV slope. We derive a robust Ly{alpha} luminosity function (LF) that spans a luminosity range from ~10^42.0^ to >10^43.5^erg/s. Significant overdense and underdense regions are detected in our sample, but the area coverage is wide enough to largely suppress the effect from such cosmic variance. Our Ly{alpha} LF is generally consistent with those from previous studies at z~3.1. At the brightest end of the LF, there is a tentative detection of a density excess that is not well described by the Schechter function. The comparison with the LFs at other redshifts suggests that the Ly{alpha} LF does not show significant evolution at 2<z<5. Finally, we build the composite spectra of the LAEs and detect the NV{lambda}1239 and CIV{lambda}{lambda}1548,1551 doublet emission lines at significance of ~4{sigma}, suggesting very hard radiation fields in (some of) these LAEs.2020ApJ...902..137Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/902/137CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/671/1227 : Ly{alpha} galaxies at z~4.5 (Dawson+, 2007)J/ApJ/667/79 : Ly{alpha} emission-line galaxies at z=3.1 (Gronwall+, 2007)J/ApJS/176/1 : Subaru/XMM-Newton deep survey (SXDS). II. (Furusawa+, 2008)J/ApJS/176/301 : Subaru/XMM-Newton deep survey IV. (SXDS) (Ouchi+, 2008)J/ApJ/736/31 : HETDEX pilot survey. II. 1.9<z<3.8 LAEs (Blanc+, 2011)J/ApJ/744/110 : LAE galaxies between 2.1=<z<=3.1 (Ciardullo+, 2012)J/ApJ/751/29 : Ly{alpha} profiles of LAEs at z=3.1 (Yamada+, 2012)J/ApJ/783/119 : z~1 Ly{alpha} emitters. I. Cand. from GALEX (Wold+, 2014)J/MNRAS/471/267 : Ly{alpha} fluxes of HDFS 2.91<z<6.64 sources (Drake+, 2017)J/MNRAS/466/1242 : CALYMHA survey. I. (Sobral+, 2017)J/MNRAS/476/4725 : SC4K catalogue of candidate LAEs (Sobral+, 2018)J/A+A/621/A107 : MUSE-Wide Ly alpha luminosity function 3<z<6 (Herenz+, 2019)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/902/137https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/902/137http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/902/137https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/902/137https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/902/137http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/902/137GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/902/137/table2 (The Ly{alpha} emitter (LAE) sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/902/137/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/902/137/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/902/137/table2?GETtext/xml+votable180.050000true34.75003-5.117290.0055555555555555566/17677 17679 17688 176903.1913271392865877e-19 5.21690004175582e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/902/137?format=asciiUVOpticaldefaultJ/ApJ/902/137/table2The Ly{alpha} emitter (LAE) samplerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/166] Running sequence numbermeta.id;meta.mainintRAJ2000[34.16/35.12] Right Ascension (J2000)degpos.eq.ra;meta.mainDEJ2000[-5.6/-4.6] Declination (J2000)degpos.eq.dec;meta.mainz[3/3.161] Spectroscopic redshift (1)src.redshiftfloatL(Lya)[1/36.4]? Lya luminosity; 10^42^erg/s units1e+35Wphys.luminosity;em.UVfloatnullableNB497[22.73/25.84]? Subaru/Suprime-Cam apparent NB497 AB magnitude (2)magphot.mag;em.optfloatnullablee_NB497[0.01/0.12]? Uncertainty in NB497magstat.errorfloatnullableNB503[22.4/25]? Subaru/Suprime-Cam apparent NB503 AB magnitude (2)magphot.mag;em.optfloatnullablee_NB503[0.01/0.14]? Uncertainty in NB503magstat.errorfloatnullablel_Bmag[<] Upper limit flag on Bmag (3)meta.code.errorcharBmag[24.2/29.02] Subaru/Suprime-Cam apparent B band AB magnitudemagphot.mag;em.opt.Bfloate_Bmag[0.01/0.51]? Uncertainty in Bmagmagstat.error;phot.magfloatnullablel_Vmag[<] Upper limit flag on Vmag (3)meta.code.errorchare_Vmag[0.01/0.21]? Uncertainty in Bmagmagstat.error;phot.magfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlcharVmag[23.38/28.51] Subaru/Suprime-Cam apparent V band AB magnitudemagphot.mag;em.opt.Vfloat