2022MNRAS.516.1170B

Query : 2022MNRAS.516.1170B

2022MNRAS.516.1170B - Mon. Not. R. Astron. Soc., 516, 1170-1182 (2022/October-2)

Red Dragon: a redshift-evolving Gaussian mixture model for galaxies.

BLACK W.K. and EVRARD A.

Abstract (from CDS):

Precision-era optical cluster cosmology calls for a precise definition of the red sequence (RS), consistent across redshift. To this end, we present the Red Dragon algorithm: an error-corrected multivariate Gaussian mixture model (GMM). Simultaneous use of multiple colours and smooth evolution of GMM parameters result in a continuous RS and blue cloud (BC) characterization across redshift, avoiding the discontinuities of red fraction inherent in swapping RS selection colours. Based on a mid-redshift spectroscopic sample of SDSS galaxies, an RS defined by Red Dragon selects quiescent galaxies (low specific star formation rate) with a balanced accuracy of over $90{{\ \rm per\ cent}}$. This approach to galaxy population assignment gives more natural separations between RS and BC galaxies than hard cuts in colour-magnitude or colour-colour spaces. The Red Dragon algorithm is publicly available at bitbucket.org/wkblack/red-dragon-gamma/.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): methods: numerical - techniques: photometric - galaxies: stellar content - large-scale structure of Universe

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 MAGAZ3NE J095924+022537 PCG 09 59 24.0 +02 25 37           ~ 11 0

Query : 2022MNRAS.516.1170B

Basic data :
MAGAZ3NE J095924+022537 -- Proto Cluster of Galaxies
Other object types: otypes_help 		ClG (MAGAZ3NE), PCG (2022ApJ)
ICRS coord. (ep=J2000) : 		09 59 24.0 +02 25 37 [ ] D 2022ApJ...926...37M
FK4 coord. (ep=B1950 eq=1950) : 		09 56 48.7 +02 40 01 [ ]
Gal coord. (ep=J2000) : 		236.3697 +42.0301 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 269912 [~] / z(spectroscopic) 3.3665 [~] / cz 1009251 [~]
   (Opt) D 2022ApJ...926...37M
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MAGAZ3NE J095924+022537

References (11 between 1850 and 2026) (Total 11)
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