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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The mass-size relation of luminous red galaxies from BOSS and DECaLS

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Author(s):
Favole, Ginevra [1] ; Montero-Dorta, Antonio D. [2] ; Prada, Francisco [3] ; Rodriguez-Torres, Sergio A. [4, 5, 6] ; Schlegel, David J. [7]
Total Authors: 5
Affiliation:
[1] ESAC, E-28692 Madrid - Spain
[2] Univ Sao Paulo, Inst Fis, Rua Matao 1371, BR-05508090 Sao Paulo - Brazil
[3] CSIC, IAA, E-18008 Granada - Spain
[4] UAM, CSIC, IFT, E-28049 Madrid - Spain
[5] CSIC, Campus Int Excellence UAM, E-28049 Madrid - Spain
[6] Univ Autonoma Madrid, Dept Fis Teor M8, E-28049 Madrid - Spain
[7] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 - USA
Total Affiliations: 7
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 480, n. 1, p. 1415-1425, OCT 2018.
Web of Science Citations: 2
Abstract

We use the DECaLS DR3 survey photometry matched to the SDSS-III/BOSS DR12 spectroscopic catalogue to investigate the morphology and stellar mass-size relation of luminous red galaxies within the CMASS and LOWZ galaxy samples in the redshift range 0.2 < z < 0.7. The large majority of both samples is composed of early-type galaxies with De Vaucouleurs profiles, while only less than 20 per cent are late-type exponentials. We calibrate DECaLS effective radii using the higher-resolution CFHT/MegaCam observations and optimize the correction for each morphological type. By cross-matching the photometric properties of the early-type population with the Portsmouth stellar mass catalogue, we are able to explore the high-mass end of the distribution using a large sample of 322994 galaxies over 4380 deg(2). We find a clear correlation between the sizes and stellar masses of these galaxies, which appears flatter than previous estimates at lower masses. The sizes of these early-type galaxies do not exhibit significant evolution within the BOSS redshift range, but a slightly declining redshift trend is found when these results are combined with z similar to 0.1 SDSS measurements at the high-mass end. The synergy between BOSS and DECaLS has important applications in other fields, including galaxy clustering and weak lensing. (AU)

FAPESP's process: 16/23567-4 - Unifying galaxy evolution and cosmology with massive dark-energy surveys
Grantee:Antonio David Montero Dorta
Support type: Scholarships in Brazil - Post-Doctorate