Compact galaxies and the size-mass galaxy distribution from a colour-selected sample at 0.04 < z < 0.15 supplemented by ugrizYJHK photometric redshifts
Autor: | Baldry, Ivan K., Sullivan, Tricia, Rani, Raffaele, Turner, Sebastian |
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Rok vydání: | 2020 |
Předmět: | |
Zdroj: | Mon.Not.Roy.Astron.Soc. 500 (2021) 1557-1574 |
Druh dokumentu: | Working Paper |
DOI: | 10.1093/mnras/staa3327 |
Popis: | The size-mass galaxy distribution is a key diagnostic for galaxy evolution. Massive compact galaxies are potential surviving relics of a high-redshift phase of star formation. Some of these could be nearly unresolved in SDSS imaging and thus not included in galaxy samples. To overcome this, a sample was selected from the combination of SDSS and UKIDSS photometry to r<17.8. This was done using colour-colour selection, and then by obtaining accurate photometric redshifts (photo-z) using scaled flux matching (SFM). Compared to spectroscopic redshifts (spec-z), SFM obtained a 1-sigma scatter of 0.0125 with only 0.3% outliers (Delta:ln(1+z)>0.06). A sample of 163186 galaxies was obtained with 0.04 Comment: 15 pages (+4 pages appendix), 16 figures (+4 figs appendix), accepted by MNRAS |
Databáze: | arXiv |
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