Morphological Parameters of a Spitzer Survey of Stellar Structure in Galaxies
| Autor: | Sharon E. Meidt, Dennis Zaritsky, Jarkko Laine, S. Comeron, T. Mizusawa, Heikki Salo, Nor Pirzkal, J. H. Knapen, Benne W. Holwerda, Mark Seibert, J. L. Hinz, Michael W. Regan, Karín Menéndez-Delmestre, J. C. Muñoz-Mateos, Kartik Sheth, A. Gil-de-Paz, S. Erroz-Ferrer, A. Bosma, Seppo Laine, Eija Laurikainen, Dimitri A. Gadotti, Tae Jung Kim, Luis C. Ho, E. Athanassoula |
|---|---|
| Přispěvatelé: | Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Astrofísica
H I MORPHOLOGY MAJOR MERGER FRACTION statistics [galaxies] MIDINFRARED EMISSION Stellar mass stellar [galaxies] media_common.quotation_subject Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Parameter space irregular [galaxies] 01 natural sciences Asymmetry STAR-FORMATION cD POLYCYCLIC AROMATIC-HYDROCARBONS SEEING GALAXIES 0103 physical sciences Galaxy formation and evolution Stellar structure content EDGE-ON GALAXIES HUBBLE-SPACE 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics media_common Physics Smoothness (probability theory) [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] 010308 nuclear & particles physics Astronomy and Astrophysics Galaxy Astronomía Moment (mathematics) spiral [galaxies] Physics and Astronomy Space and Planetary Science LUMINOSITY FUNCTION structure [galaxies] SPIRAL GALAXIES elliptical and lenticular [galaxies] general [galaxies] |
| Zdroj: | ASTROPHYSICAL JOURNAL E-Prints Complutense: Archivo Institucional de la UCM Universidad Complutense de Madrid The Astrophysical Journal The Astrophysical Journal, American Astronomical Society, 2014, 781 (1), ⟨10.1088/0004-637X/781/1/12⟩ E-Prints Complutense. Archivo Institucional de la UCM instname The Astrophysical Journal, 2014, 781 (1), ⟨10.1088/0004-637X/781/1/12⟩ |
| ISSN: | 0004-637X 1538-4357 |
| DOI: | 10.1088/0004-637X/781/1/12⟩ |
| Popis: | International audience; 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 (M-20), ellipticity (E), and the Gini index of the second-order moment (G(M)) 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 mu m 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 (C-82) and M-20 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 M-20, G(M), C, and M-20, respectively, select outliers in morphological parameter space, but each selects different subsets of galaxies. Two criteria (G(M) \textgreater 0.6, G \textgreater -0.115 x M-20 + 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 M-20. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|