J/MNRAS/469/1186ivo://CDS.VizieR/J/MNRAS/469/1186doi:10.26093/cds/vizier.74691186CDSSpeagle J.S.Eisenstein D.J.2024-08-17T20:19:01Z2020-04-21T15:23:44ZCDS support team

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

cds-question@unistra.frgalaxiesultraviolet-photometryline-intensitiesWe propose a method to substantially increase the flexibility and power of template fitting-based photometric redshifts by transforming a large number of galaxy spectral templates into a corresponding collection of 'fuzzy archetypes' using a suitable set of perturbative priors designed to account for empirical variation in dust attenuation and emission-line strengths. To bypass widely separated degeneracies in parameter space (e.g. the redshift-reddening degeneracy), we train self-organizing maps (SOMs) on large 'model catalogues' generated from Monte Carlo sampling of our fuzzy archetypes to cluster the predicted observables in a topologically smooth fashion. Subsequent sampling over the SOM then allows full reconstruction of the relevant probability distribution functions (PDFs). This combined approach enables the multimodal exploration of known variation among galaxy spectral energy distributions with minimal modelling assumptions. We demonstrate the power of this approach to recover full redshift PDFs using discrete Markov chain Monte Carlo sampling methods combined with SOMs constructed from Large Synoptic Survey Telescope ugrizY and Euclid YJH mock photometry.2017MNRAS.469.1186Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/469/1186CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJS/212/18 : An atlas of UV-to-MIR galaxy SEDs (Brown+, 2014)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/469/1186https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/469/1186http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/469/1186https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/469/1186https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/469/1186http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/469/1186GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/469/1186/tablea1 (Emission-line strengths for the 129 Brown et al. (2014, Cat. J/ApJS/212/18) templates)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/469/1186/tablea1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/469/1186/tablea1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/469/1186/tablea1?GETtext/xml+votable180.050000true198.76462524.61883330.0055555555555555566/650 700 764 1701 2167 4447 4993 5116 5181 5492 5617 5750-5751 5799 5816 5950 6011 6034 6042 6098 6104 6348 6605 7281 7424 7552 7743 8266 8492 8562 8673 8997 9133 9791 10144 10281 10379 10401 10465 10475 10561 10716 10752 10761 10841 10901 10925 10991 11027 11029 11101 11180 11263 11355 11457 11908 12537 13522-13523 17252 17594 17612 17748 17754 18209 18212 18387 18398 18406 18714 18809 18897 18932 19619 20060-20061 20118 20177 20208 20388 22721 25083 25594 25946 26028 26198 26267 26271 26971 27030 27514-27515 27555 27677 27718 27765 27773 27830 27857 27861 27907 27913-27914 27936-27938 28015 28035 28039 28123 28147 28167 28496 31081 31158https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/469/1186?format=asciiUVdefaultJ/MNRAS/469/1186/tablea1Emission-line strengths for the 129 Brown et al. (2014, Cat. J/ApJS/212/18) templatesSimbadNameSimbad column added by the CDSmeta.idcharNameNamemeta.id;meta.maincharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintB14Display the Brown et al. (2014, Cat. J/ApJS/212/18) datameta.ref.urlcharID[1/129] ID number, ordered by FUV flux in the GALEX FUV filter after normalizing each template to 1.6ummeta.id;instr.plateintlog10(FUV)FUV flux in the GALEX FUV filterphot.flux;em.UVfloatHalpha+NIIH{alpha}+NII emission-line strength (1)spect.line.intensity;em.line.HalphafloatHbetaH{beta} emission-line strength (1)spect.line.intensity;em.line.HbetafloatHgammaH{gamma} emission-line strength (1)spect.line.intensity;em.line.HgammafloatOIIO[II] emission-line strength (1)spect.line.intensityfloatOIII4O[III]4960 emission-line strength (1)spect.line.intensity;em.line.OIIIfloatOIII5O[III]5008 emission-line strength (1)spect.line.intensity;em.line.OIIIfloat_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.main