| Full text | |
| Author(s): |
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
|
| Affiliation: | [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 |
| Abstract | |
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 Opportunities: | Research Projects - Thematic Grants |