Morphological parameters of a spitzer survey of stellar structure in galaxies

B. W. Holwerda, J. C. Muñoz-Mateos, S. Comerón, S. Meidt, K. Sheth, S. Laine, J. L. Hinz, M. W. Regan, A. Gil De Paz, K. Menéndez-Delmestre, M. Seibert, T. Kim, T. Mizusawa, E. Laurikainen, H. Salo, J. Laine, D. A. Gadotti, Dennis F Zaritsky, S. Erroz-Ferrer, L. C. HoJ. H. Knapen, E. Athanassoula, A. Bosma, N. Pirzkal

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The morphology of galaxies can be quantified to some degree using a set of scale-invariant parameters. Concentration (C), asymmetry (A), smoothness (S), the Gini index (G), the relative contribution of the brightest pixels to the second-order moment of the flux (M20), ellipticity (E), and the Gini index of the second-order moment (GM) have all been applied to morphologically classify galaxies at various wavelengths. Here, we present a catalog of these parameters for the Spitzer Survey of stellar structure in Galaxies, a volume-limited, near-infrared (NIR) imaging survey of nearby galaxies using the 3.6 and 4.5 μm channels of the Infrared Array Camera on board the Spitzer Space Telescope. Our goal is to provide a reference catalog of NIR quantified morphology for high-redshift studies and galaxy evolution models with enough detail to resolve stellar mass morphology. We explore where normal, non-interacting galaxies-those typically found on the Hubble tuning fork-lie in this parameter space and show that there is a tight relation between concentration (C82) and M20 for normal galaxies. M 20 can be used to classify galaxies into earlier and later types (i.e., to separate spirals from irregulars). Several criteria using these parameters exist to select systems with a disturbed morphology, i.e., those that appear to be undergoing a tidal interaction. We examine the applicability of these criteria to Spitzer NIR imaging. We find that four relations, based on the parameters A and S, G and M20, GM, C, and M20, respectively, select outliers in morphological parameter space, but each selects different subsets of galaxies. Two criteria (GM > 0.6, G >-0.115 × M20 + 0.384) seem most appropriate to identify possible mergers and the merger fraction in NIR surveys. We find no strong relation between lopsidedness and most of these morphological parameters, except for a weak dependence of lopsidedness on concentration and M20.

Original languageEnglish (US)
Article number12
JournalAstrophysical Journal
Volume781
Issue number1
DOIs
StatePublished - Jan 20 2014

Fingerprint

stellar structure
galaxies
near infrared
merger
catalogs
moments
parameter
outlier
forks
Space Infrared Telescope Facility
asymmetry
ellipticity
pixel
stellar mass
set theory
wavelength
pixels
cameras
tuning

Keywords

  • galaxies: elliptical and lenticular, cD
  • galaxies: general
  • galaxies: irregular
  • galaxies: spiral
  • galaxies: statistics
  • galaxies: stellar content
  • galaxies: structure

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Holwerda, B. W., Muñoz-Mateos, J. C., Comerón, S., Meidt, S., Sheth, K., Laine, S., ... Pirzkal, N. (2014). Morphological parameters of a spitzer survey of stellar structure in galaxies. Astrophysical Journal, 781(1), [12]. https://doi.org/10.1088/0004-637X/781/1/12

Morphological parameters of a spitzer survey of stellar structure in galaxies. / Holwerda, B. W.; Muñoz-Mateos, J. C.; Comerón, S.; Meidt, S.; Sheth, K.; Laine, S.; Hinz, J. L.; Regan, M. W.; Gil De Paz, A.; Menéndez-Delmestre, K.; Seibert, M.; Kim, T.; Mizusawa, T.; Laurikainen, E.; Salo, H.; Laine, J.; Gadotti, D. A.; Zaritsky, Dennis F; Erroz-Ferrer, S.; Ho, L. C.; Knapen, J. H.; Athanassoula, E.; Bosma, A.; Pirzkal, N.

In: Astrophysical Journal, Vol. 781, No. 1, 12, 20.01.2014.

Research output: Contribution to journalArticle

Holwerda, BW, Muñoz-Mateos, JC, Comerón, S, Meidt, S, Sheth, K, Laine, S, Hinz, JL, Regan, MW, Gil De Paz, A, Menéndez-Delmestre, K, Seibert, M, Kim, T, Mizusawa, T, Laurikainen, E, Salo, H, Laine, J, Gadotti, DA, Zaritsky, DF, Erroz-Ferrer, S, Ho, LC, Knapen, JH, Athanassoula, E, Bosma, A & Pirzkal, N 2014, 'Morphological parameters of a spitzer survey of stellar structure in galaxies', Astrophysical Journal, vol. 781, no. 1, 12. https://doi.org/10.1088/0004-637X/781/1/12
Holwerda BW, Muñoz-Mateos JC, Comerón S, Meidt S, Sheth K, Laine S et al. Morphological parameters of a spitzer survey of stellar structure in galaxies. Astrophysical Journal. 2014 Jan 20;781(1). 12. https://doi.org/10.1088/0004-637X/781/1/12
Holwerda, B. W. ; Muñoz-Mateos, J. C. ; Comerón, S. ; Meidt, S. ; Sheth, K. ; Laine, S. ; Hinz, J. L. ; Regan, M. W. ; Gil De Paz, A. ; Menéndez-Delmestre, K. ; Seibert, M. ; Kim, T. ; Mizusawa, T. ; Laurikainen, E. ; Salo, H. ; Laine, J. ; Gadotti, D. A. ; Zaritsky, Dennis F ; Erroz-Ferrer, S. ; Ho, L. C. ; Knapen, J. H. ; Athanassoula, E. ; Bosma, A. ; Pirzkal, N. / Morphological parameters of a spitzer survey of stellar structure in galaxies. In: Astrophysical Journal. 2014 ; Vol. 781, No. 1.
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AU - Sheth, K.

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AU - Salo, H.

AU - Laine, J.

AU - Gadotti, D. A.

AU - Zaritsky, Dennis F

AU - Erroz-Ferrer, S.

AU - Ho, L. C.

AU - Knapen, J. H.

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