J/MNRAS/498/2575ivo://CDS.VizieR/J/MNRAS/498/2575doi:10.26093/cds/vizier/bg-fj-2gfCDSWiseman P.Pursiainen M.Childress M.Swann E.Smith M.Galbany L.,Lidman C.Davis T.M.Gutierrez C.P.Moller A.Thomas B.P.,Frohmaier C.Foley R.J.Hinton S.R.Kelsey L.Kessler R.Lewis G.F.,Sako M.Scolnic D.Sullivan M.Vincenzi M.Abbott T.M.C.Aguena M.,Allam S.Annis J.Bertin E.Bhargava S.Brooks D.Burke D.L.,Carnero Rosell A.Carollo D.Carrasco Kind M.Carretero J.Costanzi M.,da Costa L.N.Diehl H.T.Doel P.Everett S.Fosalba P.Frieman J.,Garcia-Bellido J.Gaztanaga E.Glazebrook K.Gruen D.Gruendl R.A.,Gschwend J.Gutierrez G.Hollowood D.L.Honscheid K.James D.J.,Kuehn K.Kuropatkin N.Lima M.Maia M.A.G.Marshall J.L.Martini P.,Menanteau F.Miquel R.Palmese A.Paz-Chinchon F.Plazas A.A.,Romer A.K.Sanchez E.Scarpine V.Schubnell M.Serrano S.,Sevilla-Noarbe I.Sommer N.E.Suchyta E.Swanson M.E.C.Tarle G.,Tucker B.E.Tucker D.L.Varga T.N.Walker A.R.(The DES Collaboration)2026-08-03T07:30:08Z2023-11-03T12:01:10ZCDS support team

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

cds-question@unistra.frtransient-sourcesgalaxiesastrometryredshiftedchemically-peculiar-starsvisible-astronomyspectroscopyRapidly evolving transients (RETs), also termed fast blue optical transients, are a recently discovered group of astrophysical events that display rapid luminosity evolution. RETs typically rise to peak in less than 10d and fade within 30, a time-scale unlikely to be compatible with the decay of Nickel-56 that drives conventional supernovae (SNe). Their peak luminosity spans a range of -15<M_g_<-22.5, with some events observed at redshifts greater than 1. Their evolution on fast time-scales has hindered high-quality follow-up observations, and thus their origin and explosion/emission mechanism remains unexplained. In this paper, we present the largest sample of RETs to date, comprising 106 objects discovered by the Dark Energy Survey, and perform the most comprehensive analysis of RET host galaxies. Using deep-stacked photometry and emission lines from OzDES spectroscopy, we derive stellar masses and star formation rates (SFRs) for 49 host galaxies, and metallicities ([O/H]) for 37. We find that RETs explode exclusively in star-forming galaxies and are thus likely associated with massive stars. Comparing RET hosts to samples of host galaxies of other explosive transients as well as field galaxies, we find that RETs prefer galaxies with high specific SFRs (<log(sSFR)> ~-9.6), indicating a link to young stellar populations, similar to stripped-envelope SNe. RET hosts appear to show a lack of chemical enrichment, their metallicities akin to long-duration gamma-ray bursts and superluminous SN host galaxies (<12+log(O/H)> ~9.4). There are no clear relationships between mass or SFR of the host galaxies and the peak magnitudes or decline rates of the transients themselves.2020MNRAS.498.2575Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/498/2575CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/498/2575https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/498/2575http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/498/2575https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/498/2575https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/498/2575http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/498/2575GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/498/2575/table1 (Host galaxy information for the 106 RETs in the DES 5-yr sample)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/498/2575/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/498/2575/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/498/2575/table1?GETtext/xml+votable180.050000true51.97076-27.527920.0055555555555555565/4436 8983 6/17669 17671 17679-17680 17683 17686 17688-17689 17691-17694 17712 17750-17753 35388 35390 35475 35927 35931 35953 35956-35957 36104 36106-361072.95118947427764e-19 5.329877840964357e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/498/2575?format=asciiOpticaldefaultJ/MNRAS/498/2575/table1Host galaxy information for the 106 RETs in the DES 5-yr sampleSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMoreLink to Tables 2 and A1meta.ref.urlcharNameTransient name (DESNNANaaaa)meta.id;meta.maincharprimaryRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainrmagr-band magnitude (1)magphot.mag;em.opt.Rfloate_rmagError on rmagmagstat.error;phot.magfloatz? Redshiftsrc.redshiftdoublenullablef_z[cd ] Flag on z (2)meta.codecharSurveySurvey used for observationinstr.setupcharExpTime? Exposure time (3)htime.duration;obs.exposurefloatnullableJ/MNRAS/498/2575/table2Host galaxy properties for the 49 DES RET host galaxies with redshifts and host galaxy spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameTransient name (DESNNANaaaa)meta.id;meta.maincharlogM*Logarithm of the stellar masslog(solMass)phys.massfloate_logM*Lower error on logM*log(solMass)stat.errorfloatE_logM*Upper error on logM*log(solMass)stat.error;stat.maxfloatlogSFRLogarithm of the star formation ratelog(solMass.yr**-1)phys.SFRfloate_logSFRLower error on logSFRlog(solMass.yr**-1)stat.error;phys.SFRfloatE_logSFRUpper error on logSFRlog(solMass.yr**-1)stat.error;stat.maxfloatlogsSFRLogarithm of the specific star formation ratelog(yr**-1)phys.SFRfloate_logsSFRLower error on logsSFRlog(yr**-1)stat.errorfloatE_logsSFRUpper error on logsSFRlog(yr**-1)stat.error;stat.maxfloatOHBest? Best 12+log(O/H) estimation (1)phys.abundfloatnullablee_OHBest? Lower error on OHBeststat.errorfloatnullableE_OHBest? Upper error on OHBeststat.error;stat.maxfloatnullableOHD16? 12+log(O/H) determined using the S2N2 diagnostic of Dopita et al. (2016Ap&SS.361...61D) (D16)phys.abundfloatnullablee_OHD16? Lower error on OHD16stat.errorfloatnullableE_OHD16? Upper error on OHD16stat.error;stat.maxfloatnullableOHN2? 12+log(O/H) determined with the N2 indicator and the calibration of Pettini & Pagel (2004MNRAS.348L..59P) (PP04)phys.abundfloatnullablee_OHN2? Lower error on OHN2stat.errorfloatnullableE_OHN2? Upper error on OHN2stat.error;stat.maxfloatnullableOHO3N2? 12+log(O/H) determined using the O3N2 indicator and the calibration of Pettini & Pagel (2004MNRAS.348L..59P) (PP04)phys.abundfloatnullablee_OHO3N2? Lower error on OHO3N2stat.errorfloatnullableE_OHO3N2? Upper error on OHO3N2stat.error;stat.maxfloatnullableOHR23? 12+log(O/H) determined using the R23 indicator and the calibration from Kobulnicky & Kewley (2004ApJ...617..240K, Cat. J/ApJ/617/240) (KK04)phys.abundfloatnullablee_OHR23? Lower error on OHR23stat.errorfloatnullableE_OHR23? Upper error on OHR23stat.error;stat.maxfloatnullableOHO3N2mean? Weighted average of OHN2, OHO3N2 and OHR23 (2)phys.abundfloatnullablee_OHO3N2mean? Lower error on OHO3N2meanstat.errorfloatnullableE_OHO3N2mean? Upper error on OHO3N2meanstat.error;stat.maxfloatnullableJ/MNRAS/498/2575/tablea1Emission line fluxes for DES RET host galaxiesFHdeltaH{delta} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloate_FHdeltaError on FHdelta0.01W.m**-2.nm**-1stat.errorfloatFHgammaH{gamma} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloate_FHgammaError on FHgamma0.01W.m**-2.nm**-1stat.errorfloatFHbeta? H{beta} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloatnullablee_FHbeta? Error on FHbeta0.01W.m**-2.nm**-1stat.errorfloatnullableFHalpha? H{alpha} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloatnullablee_FHalpha? Error on FHalpha0.01W.m**-2.nm**-1stat.errorfloatnullableNameTransient name (DESNNANaaaa)meta.id;meta.mainchare_FNII6585? Error on FNII65850.01W.m**-2.nm**-1stat.errorfloatnullableFOII3727OII 3727{AA} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloate_FOII3727Error on FOII37270.01W.m**-2.nm**-1stat.errorfloatFOIII4960? OIII 4960{AA} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloatnullablee_FOIII4960? Error on FOIII49600.01W.m**-2.nm**-1stat.errorfloatnullableFOIII5007? OIII 5007{AA} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloatnullablee_FOIII5007? Error on FOIII50070.01W.m**-2.nm**-1stat.errorfloatnullableFNII6549? NII 6549{AA} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloatnullablee_FNII6549? Error on FNII65490.01W.m**-2.nm**-1stat.errorfloatnullableFNII6585? NII 6585{AA} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloatnullableFSII6717? SII 6717{AA} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloatnullablee_FSII6717? Error on FSII67170.01W.m**-2.nm**-1stat.errorfloatnullableFSII6731? SII 6731{AA} emission line flux (1)0.01W.m**-2.nm**-1phot.flux;spect.linefloatnullablee_FSII6731? Error on FSII67310.01W.m**-2.nm**-1stat.errorfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint