RT Journal Article
T1 A unified picture of breaks and truncations in spiral galaxies from SDSS and S^(4)G imaging
A1 Gil De Paz, Armando
AB The mechanism causing breaks in the radial surface brightness distribution of spiral galaxies is not yet well known. Despite theoretical efforts, there is not a unique explanation for these features and the observational results are not conclusive. In an attempt to address this problem, we have selected a sample of 34 highly inclined spiral galaxies present both in the Sloan Digital Sky Survey and in the Spitzer Survey of Stellar Structure in Galaxies. We have measured the surface brightness profiles in the five Sloan optical bands and in the 3.6µm Spitzer band. We have also calculated the color and stellar surface mass density profiles using the available photometric information, finding two differentiated features: an innermost break radius at distances of ∼ 8 ± 1 kpc [0.77 ± 0.06 R_25] and a second characteristic radius, or truncation radius, close to the outermost optical extent (∼ 14 ± 2 kpc [1.09 ± 0.05 R_25]) of the galaxy. We propose in this work that the breaks might be a phenomena related to a threshold in the star formation, while truncations are more likely a real drop in the stellar mass density of the disk associated with the maximum angular momentum of the stars.
PB Wiley
SN 0035-8711
YR 2012
FD 2012-12
LK https://hdl.handle.net/20.500.14352/44846
UL https://hdl.handle.net/20.500.14352/44846
LA eng
NO © 2012 RAS. Artículo firmado por 24 autores. This work has been supported by the Programa Nacional de Astronomía y Astrofísica of the Spanish Ministry of Science and Innovation under grant AYA2010-21322-C03-02. We acknowledge financial support from 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.Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation and the US Department of Energy Office of Science. The SDSS-III web site is http://www.sdss3.org/. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, University of Cambridge, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington and Yale University.
NO Unión Europea. FP7
NO Ministerio de Economía y Competitividad (MINECO)
NO Programa Nacional de Astronomía y Astrofísica, España
NO Alfred P. Sloan Foundation
NO National Science Foundation (NFS), EE.UU.
NO US Department of Energy Office of Science
NO University of Arizona
NO Carnegie Mellon University
NO Brookhaven National Laboratory
NO University of Cambridge
NO University of Florida
NO French Participation Group
NO German Participation Group
NO Brazilian Participation Group
NO Harvard University
NO Instituto de Astrofísica de Canarias (IAC)
NO Michigan State/Notre Dame/JINA Participation Group
NO Johns Hopkins University
NO Lawrence Berkeley National Laboratory
NO Max Planck Institute for Astrophysics
NO Max Planck Institute for Extraterrestrial Physics
NO New Mexico State University
NO New York University
NO Ohio State University
NO Pennsylvania State University
NO University of Portsmouth
NO Princeton University
NO Spanish Participation Group
NO University of Tokyo
NO University of Utah
NO Vanderbilt University
NO University of Virginia
NO University of Washington
NO Yale University
DS Docta Complutense
RD 17 abr 2025