SIMBAD references

2015ApJS..221....8H - Astrophys. J., Suppl. Ser., 221, 8 (2015/November-0)

A catalog of visual-like morphologies in the 5 CANDELS fields using deep learning.

HUERTAS-COMPANY M., GRAVET R., CABRERA-VIVES G., PEREZ-GONZALEZ P.G., KARTALTEPE J.S., BARRO G., BERNARDI M., MEI S., SHANKAR F., DIMAURO P., BELL E.F., KOCEVSKI D., KOO D.C., FABER S.M. and McINTOSH D.H.

Abstract (from CDS):

We present a catalog of visual-like H-band morphologies of ∼50.000 galaxies (Hf160w< 24.5) in the 5 CANDELS fields (GOODS-N, GOODS-S, UDS, EGS, and COSMOS). Morphologies are estimated using Convolutional Neural Networks (ConvNets). The median redshift of the sample is <z> ∼ 1.25. The algorithm is trained on GOODS-S, for which visual classifications are publicly available, and then applied to the other 4 fields. Following the CANDELS main morphology classification scheme, our model retrieves for each galaxy the probabilities of having a spheroid or a disk, presenting an irregularity, being compact or a point source, and being unclassifiable. ConvNets are able to predict the fractions of votes given to a galaxy image with zero bias and ∼10% scatter. The fraction of mis-classifications is less than 1%. Our classification scheme represents a major improvement with respect to Concentration-Asymmetry-Smoothness-based methods, which hit a 20%-30% contamination limit at high z. The catalog is released with the present paper via the Rainbow database (http://rainbowx.fis.ucm.es/Rainbow_navigator_public/).

Abstract Copyright:

Journal keyword(s): catalogs - galaxies: high-redshift - galaxies: structure - surveys

Simbad objects: 5

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