J/A+A/634/A97ivo://CDS.VizieR/J/A+A/634/A97doi:10.26093/cds/vizier.36340097CDSKhusanova Y.Le Fevre O.Cassata P.Cucciati O.Lemaux B.C.,Tasca L.A.M.Thomas R.Garilli B.Le Brun V.Maccagni D.,Pentericci L.Zamorani G.Amorin R.Bardelli S.Castellano M.,Cassara L.P.Cimatti A.Giavalisco M.Hathi N.P.Ilbert O.,Koekemoer A.M.Marchi F.Pforr J.Ribeiro B.Schaerer D.Tresse L.,Vergani D.Zucca E.2020-10-05T08:21:56Z2020-06-13T10:52:29ZCDS support team

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

cds-question@unistra.frgalaxiescatalogsredshiftedultraviolet-astronomyThe star formation rate density (SFRD) evolution presents an area of great interest in the studies of galaxy evolution and reionization. The current constraints of SFRD at z>5 are based on the rest-frame UV luminosity functions with the data from photometric surveys. The VIMOS UltraDeep Survey (VUDS) was designed to observe galaxies at redshifts up to ~6 and opened a window for measuring SFRD at z>5 from a spectroscopic sample with a well-controlled selection function. We establish a robust statistical description of the star-forming galaxy population at the end of cosmic HI reionization (5.0<=z<=6.6) from a large sample of 49 galaxies with spectroscopically confirmed redshifts. We determine the rest-frame UV and Ly{alpha} luminosity functions and use them to calculate SFRD at the median redshift of our sample z=5.6. We selected a sample of galaxies at 5.0<=z_spec_<=6.6 from the VUDS. We cleaned our sample from low redshift interlopers using ancillary photometric data. We identified galaxies with Ly{alpha} either in absorption or in emission, at variance with most spectroscopic samples in the literature where Ly{alpha} emitters (LAE) dominate. We determined luminosity functions using the 1/V_max_ method. The galaxies in this redshift range exhibit a large range in their properties. A fraction of our sample shows strong Ly{alpha} emission, while another fraction shows Ly{alpha} in absorption. UV-continuum slopes vary with luminosity, with a large dispersion. We find that star-forming galaxies at these redshifts are distributed along the main sequence in the stellar mass vs. SFR plane, described with a slope {alpha}=0.85+/-0.05. We report a flat evolution of the specific SFR compared to lower redshift measurements. We find that the UV luminosity function is best reproduced by a double power law, while a fit with a Schechter function is only marginally inferior. The Ly{alpha} luminosity function is best fitted with a Schechter function. We derive a logSFRD_UV_(M_{sun}_/yr/Mpc^3^)=-1.45^+0.06^_-0.08_ and logSFRD_Ly{alpha}_(M_{sun}_/yr/Mpc^3^)=-1.40^+0.07^_-0.08_. The SFRD derived from the Ly{alpha} luminosity function is in excellent agreement with the UV-derived SFRD after correcting for IGM absorption.Conclusions. Our new SFRD measurements at a mean redshift of z=5.6 are ~0.2dex above the mean SFRD reported in Madau & Dickinson (2014ARA&A..52..415M), but in excellent agreement with results from Bouwens et al. (2015ApJ...803...34B). These measurements confirm the steep decline of the SFRD at z>2. The bright end of the Ly{alpha} luminosity function has a high number density, indicating a significant star formation activity concentrated in the brightest LAE at these redshifts. LAE with equivalent width EW>25{AA} contribute to about 75% of the total UV-derived SFRD. While our analysis favors low dust content in 5.0<z<6.6, uncertainties on the dust extinction correction and associated degeneracy in spectral fitting will remain an issue, when estimating the total SFRD until future surveys extending spectroscopy to the NIR rest-frame spectral domain, such as with JWST.2020A&A...634A..97Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/634/A97CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/600/A110 : VIMOS Ultra Deep Survey (VUDS) DR1 (Tasca+, 2017)http://cesam.lam.fr/vuds : VUDS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/634/A97https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/634/A97http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/634/A97https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/634/A97https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/634/A97http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/634/A97GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapUVdefaultJ/A+A/634/A97/tablea2Summary of the selection criteriarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/49] Sequential numbermeta.recordintNameGalaxy namemeta.id;meta.maincharzspSpectroscopic redshiftsrc.redshiftfloatFlagFlag (G1)meta.code.errorintCodea[Yes/No -] No detection below 912{AA}meta.codecharCodeb[Yes/No -] No or faint detection between 912{AA} and Ly{alpha}meta.codecharCodec[Yes/No -] At least one detection at position of Ly{alpha} or after Ly{alpha}meta.codechardz/sigma? Redshift error to redshift dispersion ratiostat.errorfloatnullablechi2? chi^2^ valuestat.fit.chi2;stat.valuefloatnullableCoded[Yes/No -] Signs of contamination in photometry or bad sky subtractionmeta.codecharComCommentsmeta.notecharJ/A+A/634/A97/tablea1Physical parameters of galaxies in our sampleNameGalaxy namemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintzspSpectroscopic redshiftsrc.redshiftfloatFlagFlag (G1)meta.code.errorintMFUV? Absolute FUV magnitudemagphys.magAbsfloatnullableFLya? Lyman{alpha} flux (in 10^-16^erg/s/cm^2^/{AA})1e-20W.m**-2.nm**-1phot.fluxfloatnullableE_FLya? Error on FLya (upper value)1e-20W.m**-2.nm**-1stat.error;stat.maxfloatnullablee_FLya? Error on FLya (lower value)1e-20W.m**-2.nm**-1stat.errorfloatnullableS/NEL? Signal-to-noise ratiostat.snrfloatnullableAge? AgeMyrtime.agefloatnullableE_Age? Error on Age (upper value)Myrstat.error;stat.maxfloatnullablee_Age? Error on Age (lower value)Myrstat.error;time.agefloatnullablelogMass? Masslog(solMass)phys.massfloatnullableE_logMass? Error on Mass (upper value)log(solMass)stat.error;stat.maxfloatnullablee_logMass? Error on Mass (lower value)log(solMass)stat.error;phys.massfloatnullablelogSFR? Star formation ratesolMass/yrphys.SFRfloatnullableE_logSFR? Error on logSFR (upper value)solMass/yrstat.error;stat.maxfloatnullablee_logSFR? Error on logSFR (lower value)solMass/yrstat.error;phys.SFRfloatnullablelogsSFR? Specific star formation ratelog(Gyr**-1)phys.SFRfloatnullableE_logsSFR? Error on logsSFR (upper value)log(Gyr**-1)stat.error;stat.maxfloatnullablee_logsSFR? Error on logsSFR (lower value)log(Gyr**-1)stat.errorfloatnullable