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A classical morphological analysis of galaxies in the Spitzer Survey of Stellar Structure in Galaxies (S ^(4) G)

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Gil de Paz, Armando (2015) A classical morphological analysis of galaxies in the Spitzer Survey of Stellar Structure in Galaxies (S ^(4) G). Astrophysical journal supplement series, 217 (2). ISSN 0067-0049

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Official URL: http://dx.doi.org/10.1088/0067-0049/217/2/32


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http://iopscience.iop.org/Publisher


Abstract

The Spitzer Survey of Stellar Structure in Galaxies (S(4)G) is the largest available database of deep, homogeneous middle-infrared (mid-IR) images of galaxies of all types. The survey, which includes 2352 nearby galaxies, reveals galaxy morphology only minimally affected by interstellar extinction. This paper presents an atlas and classifications of S(4)G galaxies in the Comprehensive de Vaucouleurs revised Hubble-Sandage (CVRHS) system. The CVRHS system follows the precepts of classical de Vaucouleurs morphology, modified to include recognition of other features such as inner, outer, and nuclear lenses, nuclear rings, bars, and disks, spheroidal galaxies, X patterns and box/peanut structures, OLR subclass outer rings and pseudorings, bar ansae and barlenses, parallel sequence latetypes, thick disks, and embedded disks in 3D early-type systems. We show that our CVRHS classifications are internally consistent, and that nearly half of the S(4)G sample consists of extreme late-type systems (mostly bulgeless, pure disk galaxies) in the range Scd-Im. The most common family classification for mid-IR types S0/a to Sc is SA while that for types Scd to Sm is SB. The bars in these two type domains are very different in mid-IR structure and morphology. This paper examines the bar, ring, and type classification fractions in the sample, and also includes several montages of images highlighting the various kinds of "stellar structures" seen in mid-IR galaxy morphology.


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© 2015. The American Astronomical Society. All rights reserved. Artículo firmado por 25 autores. We thank the anonymous referee for many helpful comments that greatly improved this paper. R.B. acknowledges the support of a grant from the Research Grants Committee of the University of Alabama. K.S. acknowledges the support of the National Radio Astronomy Observatory. The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc. J.H.K. acknowledges financial support from the Spanish MINECO under grant No. AYA2013-41243-P. E.A. and A.B. acknowledge financial support to the DAGAL network from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme FP7/2007-2013/under REA grant agreement number PITN-GA-2011-289313. E.A. and A.B. also acknowledge financial support from the CNES (Centre National d'Etudes Spatiales-France). L.C.H. acknowledges support from the Kavli Foundation, Peking University, and the Chinese Academy of Science through grant No. XDB09030100 (Emergence of Cosmological Structures) from the Strategic Priority Research Program. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

Uncontrolled Keywords:Barred spiral galaxies; Near-infrared atlas; Edge-on galaxies; 3.6 mu-m; Secular evolution; Disk galaxies; S 0 galaxies; Classification-system; Surface photometry; Hubble sequence
Subjects:Sciences > Physics > Astrophysics
Sciences > Physics > Astronomy
ID Code:30769
Deposited On:11 Jun 2015 12:03
Last Modified:10 Dec 2018 15:05

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