2011A&A...525A.157H


Query : 2011A&A...525A.157H

2011A&A...525A.157H - Astronomy and Astrophysics, volume 525A, 157-157 (2011/1-1)

Revisiting the Hubble sequence in the SDSS DR7 spectroscopic sample: a publicly available Bayesian automated classification.

HUERTAS-COMPANY M., AGUERRI J.A.L., BERNARDI M., MEI S. and SANCHEZ ALMEIDA J.

Abstract (from CDS):

We present an automated morphological classification in 4 types (E, S0, Sab, Scd) of ∼700000 galaxies from the SDSS DR7 spectroscopic sample based on support vector machines. The main new property of the classification is that we associate a probability to each galaxy of being in the four morphological classes instead of assigning a single class. The classification is therefore better adapted to nature where we expect a continuous transition between different morphological types. The algorithm is trained with a visual classification and then compared to several independent visual classifications including the Galaxy Zoo first-release catalog. We find a very good correlation between the automated classification and classical visual ones. The compiled catalog is intended for use in different applications and is therefore freely available through a dedicated webpage "http://gepicom04.obspm.fr/sdss_morphology/Morphology_2010.html" and soon from the CasJobs database.

Abstract Copyright:

Journal keyword(s): catalogs - astronomical databases: miscellaneous - Galaxy: fundamental parameters - galaxies: evolution - Galaxy: formation

VizieR on-line data: <Available at CDS (J/A+A/525/A157): catalog.dat classes.dat catalog.fit>

Simbad objects: 0

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2021.07.25-06:36:51

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