NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-20 T16:04:34 PDT
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For refcode 2011A&A...525A.157H:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2011A&A...525A.157H 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.; Sanchez Almeida, J. Abstract. We present an automated morphological classification in 4 types (E, S0, Sab, Scd) of ~700 000 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* and soon from the CasJobs database. Key words: catalogs, astronomical databases: miscellaneous, Galaxy: fundamental parameters, galaxies: evolution, Galaxy: formation
There are 696701 NED objects in this reference.
Please click here for ADS abstract

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