J/A+A/707/A239ivo://CDS.VizieR/J/A+A/707/A239CDSVaradaraj R.G.Bowler R.A.A.Jarvis M.J.Weaver J.R.Banados E.,Holloway P.Caputi K.I.Wilkins S.M.Yang D.Milvang-Jensen B.,Gabarra L.Oesch P.A.Amara A.Andreon S.Auricchio N.Baccigalupi C.,Baldi M.Bardelli S.Biviano A.Branchini E.Brescia M.Camera S.,Canas-Herrera G.Capobianco V.Carbone C.Carretero J.Castellano M.,Castignani G.Cavuoti S.Chambers K.C.Cimatti A.Colodro-Conde C.,Congedo G.Conselice C.J.Conversi L.Copin Y.Courbin F.,Courtois H.M.Cropper M.Da Silva A.Degaudenzi H.De Lucia G.Dole H.,Dubath F.Duncan C.A.J.Dupac X.Dusini S.Escoffier S.Farina M.,Farinelli R.Faustini F.Ferriol S.Finelli F.Fosalba P.,Fourmanoit N.Frailis M.Franceschi E.Fumana M.Galeotta S.George K.,Gillis B.Giocoli C.Gracia-Carpio J.Grazian A.Grupp F.Guzzo L.,Haugan S.V.H.Hoar J.Hoekstra H.Holmes W.Hook I.M.Hormuth F.,Hornstrup A.Jahnke K.Jhabvala M.Joachimi B.Keihanen E.Kermiche S.,Kiessling A.Kilbinger M.Kubik B.Kummel M.Kunz M.Kurki-Suonio H.,Le Brun A.M.C.Ligori S.Lilje P.B.Lindholm V.Lloro I.Mainetti G.,Maino D.Maiorano E.Mansutti O.Marggraf O.Martinelli M.Martinet N.,Marulli F.Massey R.J.Medinaceli E.Mei S.Melchior M.Mellier Y.,Meneghetti M.Merlin E.Meylan G.Mora A.Moresco M.Moscardini L.,Nakajima R.Neissner C.Niemi S.-M.Padilla C.Paltani S.Pasian F.,Pedersen K.Percival W.J.Pettorino V.Pires S.Polenta G.Poncet M.,Popa L.A.Pozzetti L.Raison F.Renzi A.Rhodes J.Riccio G.,Romelli E.Roncarelli M.Rossetti E.Saglia R.Sakr Z.Sapone D.,Sartoris B.Schirmer M.Schneider P.Schrabback T.Secroun A.,Seidel G.Serrano S.Simon P.Sirignano C.Sirri G.Stanco L.,Starck J.-L.Steinwagner J.Tallada-Crespi P.Taylor A.N.Teplitz H.I.,Tereno I.Tessore N.Toft S.Toledo-Moreo R.Torradeflot F.,Tutusaus I.Valenziano L.Valiviita J.Vassallo T.Veropalumbo A.,Wang Y.Weller J.Zamorani G.Zerbi F.M.Zucca E.Martin-Fleitas J.,Scottez V.Viel M.2026-04-02T06:28:33Z2026-03-09T09:29:48ZCDS support team

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

cds-question@unistra.frgalaxiesastrometryredshiftedline-intensitiesabsolute-magnitudephotometryvisible-astronomyinfrared-astronomyWe present a search for z ~= 7 Lyman-break galaxies using the 1.72 deg^2^ near-infrared UltraVISTA survey in the COSMOS field, reaching 5 {sigma} depths in Y of 26.2. We incorporate deep Euclid optical and Euclid + Spitzer NIR imaging for a full spectral energy distribution (SED) fitting analysis. We find 289 candidate galaxies at 6.5 <= z <= 7.5 covering -22.6 <= MUV <= -20.2, faint enough to overlap with Hubble Space Telescope studies. We conduct a separate selection by including complementary Euclid performance verification imaging (reaching 5 {sigma} depths of 26.3), yielding 140 galaxies in 0.65 deg^2^, with 38 sources unique to this sample. We compute the rest-frame UV luminosity function (UV LF) from our samples, extending below the knee (M*=-21.14). We find that the shape of the UV LF is consistent with both a Schechter function and double-power law (DPL) at the magnitudes probed by this sample, with a DPL preferred at MUV < -22.5 when bright-end results are included. The UltraVISTA+Euclid sample provides a clean measurement of the LF due to the overlapping near-infrared filters identifying molecular absorption features in the SEDs of ultra-cool dwarf interlopers, and a dditional faint galaxies are recovered. A comparison with JWST LFs at z > 7 suggests a gentle evolution in the bright-end slope, although this is limited by a lack of robust bright-end measurements at z > 9. We forecast that in the Euclid Deep Fields, the removal of contaminant ultra-cool dwarfs as point sources will be possible at JE < 24.5. Finally, we present a high-equivalent-width Lyman-{alpha} emitter candidate identified by combining HSC, VISTA, and Euclid broadband photometry, highlighting the synergistic power t hese instruments will have in the Euclid Auxiliary Fields for identifying extreme sources in the Epoch of Reionisation.2026A&A...707A.239Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/707/A239CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/704/A339 : COSMOS2025 (Shuntov+, 2025)J/A+A/697/A16 : Euclid ERO LBG and ERS candidate lists (Weaver+, 2025)J/MNRAS/515/3126 : REBELS. Dust Continuum Detections at z>6.5 (Inami+, 2022)J/MNRAS/440/2810 : Galaxy luminosity function at z =~ 7 (Bowler+, 2014)J/MNRAS/432/2696 : Galaxy luminosity function at z = 7-9 (McLure+, 2013)J/ApJ/975/162 : Spectra of brown dwarf candidates in ONC from JWSTJ/ApJ/810/71 : UV mag of candidate galaxies at 3~<z~<8.5J/ApJ/803/34 : z~4-10 galaxies from HST legacy fields (Bouwens+, 2015)J/ApJ/793/115 : UV-continuum slopes beta for z~4-8 galaxies (Bouwens+, 2014)J/ApJS/259/20 : GOLDRUSH. IV. z~3-7 galaxies (Harikane+, 2022)J/ApJS/258/11 : The COSMOS2020 catalog (Weaver+, 2022)J/ApJS/237/39 : Spitzer survey of UltraVISTA deep Stripes (SMUVS)J/ApJS/224/24 : The COSMOS2015 catalog (Laigle+, 2016)J/ApJS/219/15 : Morphologies of z=0-10 galaxies with HST dataJ/ApJS/218/33 : Spitzer-CANDELS catalog within 5 deep fields (Ashby+, 2015)J/AJ/162/47 : UV luminosity in ~25000 2<z<9 galaxies (Bouwens+, 2021)J/PASJ/70/S10 : GOLDRUSH I. UV magnitudes (Ono+, 2018)III/334 : VISTA Deep Extragalactic Observations (VIDEO) (Jarvis+,2013)II/388 : Euclid final merged catalog. Q1 data releaseII/373 : The fourth UltraVISTA data release (DR4) (Moneti+, 2019)II/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/350 : Gaia EDR3 (Gaia Collaboration, 2020)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/707/A239https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/707/A239http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/707/A239https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/707/A239https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/707/A239http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/707/A239GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/707/A239/uviez7 (UltraVISTA+Euclid selection of LGB candidates for SED fit with HSC+VISTA+Spitzer/IRAC+Euclid (table 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A239/uviez7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A239/uviez7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A239/uviez7?GETtext/xml+votable180.050000true150.22567877873431.84679719171730.005555555555555556Cone search capability for table J/A+A/707/A239/uvistaz7 (UltraVISTA-only selection LGB candidates for SED fit with HSC+VISTA+Spitzer/IRAC without Euclid (table 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/707/A239/uvistaz7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/707/A239/uvistaz7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/707/A239/uvistaz7?GETtext/xml+votable180.050000true149.9123833341451.610633781417220.0055555555555555565/6814 6/27245 27247 27344https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/707/A239?format=asciiOpticalInfrareddefaultJ/A+A/707/A239/uviez7UltraVISTA+Euclid selection of LGB candidates for SED fit with HSC+VISTA+Spitzer/IRAC+Euclid (table 3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (RA)degpos.eq.ra;meta.mainDEJ2000Declination (J2000) (DEC)degpos.eq.dec;meta.maine_UVMagLower uncertainty of UVMag (dMuv_inf)magstat.error;phot.magdoubleFHSCgHSC-SSP flux at g band optical filter (flux_HSC_G)mW.m**-2.Hz**-1phot.flux.density;em.opt.BdoubleSpTypeSpectral type for the stellar model of ultra-cool dwarf interloper solution (Stellar_model)src.spTypecharzphPhotometric redshift of the lyman-break galaxy solution (Zphot)src.redshiftdoubleE_zphUpper uncertainty of zph (dZphot_sup)stat.error;stat.maxdoublee_zphLower uncertainty of zph (dZphot_inf)stat.errordoubleChi2The Chi2 of the best SED fitting process of the lyman-break galaxy z>6.5 solution (Chi2)stat.fit.chi2doublezphsecLow photometric redshift of the low-redshift dusty galaxy secondary solution (Zphot_sec)src.redshift.photfloatChi2secThe Chi2 value from SED fitting process of the low-redshift dusty galaxy secondary solution (Chi2_sec)stat.fit.chi2doubleChi2starThe Chi2 of the best SED fit process of ultra-cool dwarf interloper solution (Chi2_star)stat.fit.chi2doubleEWLya? Computed equivalent width of the Lyman-{alpha} emission line in high-redshift template (Lyman_alpha_EW)0.1nmspect.line.eqWidthdoublenullableUVMagThe measured absolute rest-frame UV magnitude (MUV)magphys.magAbs;em.UVdoubleE_UVMagUpper uncertainty of UVMag (dMuv_sup)magstat.error;stat.maxdoubleFHSCrHSC-SSP flux at r band optical filter (flux_HSC_R)mW.m**-2.Hz**-1phot.flux.density;em.opt.RdoubleFHSCiHSC-SSP flux at i band optical filtermW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFHSCNB0816HSC-SSP flux at NB816 optical filter (flux_HSC_NB0816)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFHSCzHSC-SSP flux at z band filter (flux_HSC_Z)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFHSCNB921HSC-SSP flux at NB921 band filter (flux_HSC_NB0921)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFHSCYHSC-SSP flux at Y band filter (flux_HSC_Y)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFVISIEEuclid VIS flux at I_E_ band filter (flux_IE)mW.m**-2.Hz**-1phot.flux.density;em.opt.RdoubleFNISPYEEuclid NISP flux at Y_E_ band filter (flux_YE)mW.m**-2.Hz**-1phot.flux.density;em.IR.JdoubleFNISPJEEuclid NISP flux at J_E_ band filter (flux_JE)mW.m**-2.Hz**-1phot.flux.density;em.IR.JdoubleFNISPHEEuclid NISP flux at H_E_ band filter (flux_HE)mW.m**-2.Hz**-1phot.flux.density;em.IR.HdoubleFNIRYUltraVISTA flux at Y NIR band (flux_Y)mW.m**-2.Hz**-1phot.flux.density;em.IR.JdoubleFNIRJUltraVISTA flux at J NIR band (flux_J)mW.m**-2.Hz**-1phot.flux.density;em.IR.JdoubleFNIRHUltraVISTA flux at H NIR band (flux_H)mW.m**-2.Hz**-1phot.flux.density;em.IR.HdoubleFNIRKsUltraVISTA flux at Ks NIR band (flux_Ks)mW.m**-2.Hz**-1phot.flux.density;em.IR.KdoubleFIRAC1Spitzer/IRAC flux at IRAC1 IR band (flux_IRAC1)mW.m**-2.Hz**-1phot.flux.density;em.IR.3-4umdoubleFIRAC2Spitzer/IRAC flux at IRAC2 IR band (flux_IRAC2)mW.m**-2.Hz**-1phot.flux.density;em.IR.4-8umdoublee_FHSCgError of FHSCg (err_HSC_G)mW.m**-2.Hz**-1stat.errordoublee_FHSCrError of FHSCr (err_HSC_R)mW.m**-2.Hz**-1stat.errordoublee_FHSCiError of FHSCi (err_HSC_I)mW.m**-2.Hz**-1stat.errordoublee_FHSCNB0816Error of FHSCNB0816 (err_HSC_NB0816)mW.m**-2.Hz**-1stat.errordoublee_FHSCzError of FHSCz (err_HSC_Z)mW.m**-2.Hz**-1stat.errordoublee_FHSCNB921Error of FHSCNB921 (err_HSC_NB0921)mW.m**-2.Hz**-1stat.errordoublee_FHSCYError of FHSCY (err_HSC_Y)mW.m**-2.Hz**-1stat.errordoublee_FVISIEError of FVISIE (err_IE)mW.m**-2.Hz**-1stat.errordoublee_FNISPYEError of FNISPYE (err_YE)mW.m**-2.Hz**-1stat.errordoublee_FNISPJEError of FNISPJE (err_JE)mW.m**-2.Hz**-1stat.errordoublee_FNISPHEError of FNISPHE (err_HE)mW.m**-2.Hz**-1stat.errordoublee_FNIRYError of FNIRY (err_Y)mW.m**-2.Hz**-1stat.errordoublee_FNIRJError of FNIRJ (err_J)mW.m**-2.Hz**-1stat.errordoublee_FNIRHError of FNIRH (err_H)mW.m**-2.Hz**-1stat.errordoublee_FNIRKsError of FNIRKs (err_Ks)mW.m**-2.Hz**-1stat.errordoublee_FIRAC1? Error of FIRAC1 (err_IRAC1)mW.m**-2.Hz**-1stat.errordoublenullablee_FIRAC2? Error of FIRAC2 (err_IRAC2)mW.m**-2.Hz**-1stat.errordoublenullableCOSMOS2020Display the COSMOS2020 catalog of Weaver et al. 2022ApJS..258...11W, Cat. J/ApJS/258/11meta.ref.urlintnullableCOSMOS2025Display the COSMOS2025 catalog of Shuntov et al. 2025A&A...704A.339S, Cat. J/A+A/704/A339meta.ref.urlintnullableEUCLThe euclid source identifier designation as EUCL JHHMMSS.ss+DDMMSS.s (SOURCE_ID)meta.id;meta.maincharJ/A+A/707/A239/uvistaz7UltraVISTA-only selection LGB candidates for SED fit with HSC+VISTA+Spitzer/IRAC without Euclid (table 3)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension (J2000) (RA)degpos.eq.ra;meta.maine_FNIRYError of FNIRY (err_Y)mW.m**-2.Hz**-1stat.errordoublee_FNIRJError of FNIRJ (err_J)mW.m**-2.Hz**-1stat.errordoublee_FNIRHError of FNIRH (err_H)mW.m**-2.Hz**-1stat.errordoublee_FNIRKsError of FNIRKs (err_Ks)mW.m**-2.Hz**-1stat.errordoublee_FIRAC1? Error of FIRAC1 (err_IRAC1)mW.m**-2.Hz**-1stat.errordoublenullablee_FIRAC2? Error of FIRAC2 (err_IRAC2)mW.m**-2.Hz**-1stat.errordoublenullableCOSMOS2020Display the COSMOS2020 catalog of Weaver et al. 2022ApJS..258...11W, Cat. J/ApJS/258/11meta.ref.urlintnullableCOSMOS2025Display the COSMOS2025 catalog of Shuntov et al. 2025A&A...704A.339S, Cat. J/A+A/704/A339meta.ref.urlintnullableDEJ2000Declination (J2000) (DEC)degpos.eq.dec;meta.mainzphPhotometric redshift of the lyman-break galaxy solution (Zphot)src.redshiftdoubleE_zphUpper uncertainty of zph (dZphot_sup)stat.error;stat.maxdoublee_zphLower uncertainty of zph (dZphot_inf)stat.errordoubleChi2The Chi2 of the best SED fitting process of the lyman-break galaxy z>6.5 solution (Chi2)stat.fit.chi2doublezphsecLow photometric redshift of the low-redshift dusty galaxy secondary solution (Zphot_sec)src.redshift.photfloatChi2secThe Chi2 value from SED fitting process of the low-redshift dusty galaxy secondary solution (Chi2_sec)stat.fit.chi2doubleChi2starThe Chi2 of the best SED fit process of ultra-cool dwarf interloper solution (Chi2_star)stat.fit.chi2doubleEWLya? Computed equivalent width of the Lyman-{alpha} emission line in high-redshift template (Lyman_alpha_EW)0.1nmspect.line.eqWidthdoublenullableUVMagThe measured absolute rest-frame UV magnitude (MUV)magphys.magAbs;em.UVdoubleE_UVMagUpper uncertainty of UVMag (dMuv_sup)magstat.error;stat.maxdoublee_UVMagLower uncertainty of UVMag (dMuv_inf)magstat.error;phot.magdoubleFHSCgHSC-SSP flux at g band optical filter (flux_HSC_G)mW.m**-2.Hz**-1phot.flux.density;em.opt.BdoubleFHSCrHSC-SSP flux at r band optical filter (flux_HSC_R)mW.m**-2.Hz**-1phot.flux.density;em.opt.RdoubleFHSCiHSC-SSP flux at i band optical filter (flux_HSC_I)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFHSCNB0816HSC-SSP flux at NB816 optical filter (flux_HSC_NB0816)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFHSCzHSC-SSP flux at z band filter (flux_HSC_Z)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFHSCNB921HSC-SSP flux at NB921 band filter (flux_HSC_NB0921)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFHSCYHSC-SSP flux at Y band filter (flux_HSC_Y)mW.m**-2.Hz**-1phot.flux.density;em.opt.IdoubleFNIRYUltraVISTA flux at Y NIR band (flux_Y)mW.m**-2.Hz**-1phot.flux.density;em.IR.JdoubleFNIRJUltraVISTA flux at J NIR band (flux_J)mW.m**-2.Hz**-1phot.flux.density;em.IR.JdoubleFNIRHUltraVISTA flux at H NIR band (flux_H)mW.m**-2.Hz**-1phot.flux.density;em.IR.HdoubleFNIRKsUltraVISTA flux at Ks NIR band (flux_Ks)mW.m**-2.Hz**-1phot.flux.density;em.IR.KdoubleFIRAC1Spitzer/IRAC flux at IRAC1 IR band (flux_IRAC1)mW.m**-2.Hz**-1phot.flux.density;em.IR.3-4umdoubleFIRAC2Spitzer/IRAC flux at IRAC2 IR band (flux_IRAC2)mW.m**-2.Hz**-1phot.flux.density;em.IR.4-8umdoublee_FHSCgError of FHSCg (err_HSC_G) Column#29 (err_HSC_G)mW.m**-2.Hz**-1stat.errordoublee_FHSCrError of FHSCr (err_HSC_R)mW.m**-2.Hz**-1stat.errordoublee_FHSCiError of FHSCi (err_HSC_I)mW.m**-2.Hz**-1stat.errordoublee_FHSCNB0816Error of FHSCNB0816 (err_HSC_NB0816)mW.m**-2.Hz**-1stat.errordoublee_FHSCzError of FHSCz (err_HSC_Z)mW.m**-2.Hz**-1stat.errordoublee_FHSCNB921Error of FHSCNB921 (err_HSC_NB0921)mW.m**-2.Hz**-1stat.errordoublee_FHSCYError of FHSCY (err_HSC_Y)mW.m**-2.Hz**-1stat.errordoubleUVISTAThe UVISTA source identifier designation as UVISTA JHHMMSS.ss+DDMMSS.s (SOURCE_ID) (1)meta.id;meta.maincharSpTypeSpectral type for the stellar model of ultra-cool dwarf interloper solution (Stellar_model)src.spTypecharJ/A+A/707/A239/listList of fits cutouts of the UltraVISTA+Euclid in the Euclid IE, YE, JE, and HE filtersNxNumber of pixels along X-axismeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintEUCLThe euclid source identifier designation as EUCL JHHMMSS.ss+DDMMSS.s (SOURCE_ID)meta.id;meta.maincharNyNumber of pixels along Y-axismeta.numberintsizeSize of FITS fileKibytephys.size;meta.fitsintFileNameName of FITS file, in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the FITS filemeta.title;meta.fitschar