Galaxy LF with GAMA and KiDS data

In this study, we present a new experimental design using clustering-based redshift inference to measure the evolving galaxy luminosity function (GLF) spanning 5.5 decades from L ~ 10^11.5^ to 10^6^ L_{sun}. We use data from the Galaxy And Mass Assembly (GAMA) survey and the Kilo-Degree Survey (KiDS). We derive redshift distributions in bins of apparent magnitude to the limits of the GAMA- KiDS photometric catalogue: m_r <= 23; more than a decade in luminosity beyond the limits of the GAMA spectroscopic redshift sample via clustering-based redshift inference. This technique uses spatial cross-correlation statistics for a reference set with known redshifts (in our case, the main GAMA sample) to derive the redshift distribution for the target ensemble. For the calibration of the redshift distribution, we use a simple parametrization with an adaptive normalization factor over the interval 0.005 < z < 0.48 to derive the clustering redshift results. We find that the GLF has a relatively constant power-law slope {alpha} =~ -1.2 for -17 <= M_r_ <= -13, and then appears to steepen sharply for -13 <= M_r_ <= -10. This upturn appears to be where globular clusters (GCs) take over to dominate the source counts as a function of luminosity. Thus, we have mapped the GLF across the full range of the z ~ 0 field galaxy population from the most luminous galaxies down to the GC scale.

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/509/5467
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/509/5467
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/509/5467
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/509/5467
Provenance
Creator Karademir G.S.; Taylor E.N.; Blake C.; Baldry I.K.; Bellstedt S.,Bilicki M.; Brown M.J.I.; Cluver M.E.; Driver S.P.; Hildebrandt H.,Holwerda B.W.; Hopkins A.M.; Loveday J.; Phillipps S.; Wright A.H.
Publisher CDS
Publication Year 2024
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics