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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.)

Gradient pattern analysis applied to galaxy morphology

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Rosa, R. R. [1] ; de Carvalho, R. R. [2] ; Sautter, R. A. [1] ; Barchi, P. H. [1] ; Stalder, D. H. [1, 3] ; Moura, T. C. [2] ; Rembold, S. B. [4] ; Morell, D. R. F. [5] ; Ferreira, N. C. [1]
Total Authors: 9
[1] Natl Inst Space Res INPE, Lab Comp & Appl Math, BR-12245970 Sao Jose Dos Campos - Brazil
[2] Natl Inst Space Res INPE, Astrophys Div, BR-12245970 Sao Jose Dos Campos - Brazil
[3] NIDTEC FP UNA, San Lorenzo 2169000 - Paraguay
[4] Univ Fed Santa Maria, Dept Fis, CCNE, BR-97105900 Santa Maria, RS - Brazil
[5] Univ Estadual Santa Cruz, DCET, BR-45662900 Ilheus - Brazil
Total Affiliations: 5
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 477, n. 1, p. L101-L105, JUN 2018.
Web of Science Citations: 0

Gradient pattern analysis (GPA) is a well-established technique for measuring gradient bilateral asymmetries of a square numerical lattice. This paper introduces an improved version of GPA designed for galaxy morphometry. We show the performance of the new method on a selected sample of 54 896 objects from the SDSS-DR7 in common with Galaxy Zoo 1 catalogue. The results suggest that the second gradient moment, G(2), has the potential to dramatically improve over more conventional morphometric parameters. It separates early-from late-type galaxies better (similar to 90 per cent) than the CAS system (C similar to 79 per cent, A similar to 50 per cent, S similar to 43 per cent) and a benchmark test shows that it is applicable to hundreds of thousands of galaxies using typical processing systems. (AU)

FAPESP's process: 14/11156-4 - What drives the stellar mass growth of Early-Type galaxies? Born or made: the saga continues
Grantee:Reinaldo Ramos de Carvalho
Support type: Research Projects - Thematic Grants