NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-27 T05:22:41 PDT
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For refcode 2012MNRAS.427.1102M:
Retrieve 34 NED objects in this reference.
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NED Abstract

Copyright by Royal Astronomical Society. 2012MNRAS.427.1102M A unified picture of breaks and truncations in spiral galaxies from SDSS and S^4^G imaging Martin-Navarro, Ignacio; Bakos, Judit; Trujillo, Ignacio; Knapen, Johan H.; Athanassoula, E.; Bosma, Albert; Comeron, Sebastien; Elmegreen, Bruce G.; Erroz-Ferrer, Santiago; Gadotti, Dimitri A.; Gil de Paz, Armando; Hinz, Joannah L.; Ho, Luis C.; Holwerda, Benne W.; Kim, Taehyun; Laine, Jarkko; Laurikainen, Eija; Menendez-Delmestre, Karin.; Mizusawa, Trisha; Munoz-Mateos, Juan-Carlos; Regan, Michael W.; Salo, Heikki; Seibert, Mark; Sheth, Kartik Abstract. 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 in both the Sloan Digital Sky Survey (SDSS) and the Spitzer Survey of Stellar Structure in Galaxies (S^4^G). We have measured the surface-brightness profiles in the five Sloan optical bands and in the 3.6-micron Spitzer band. We have also calculated the colour 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 breaks might be phenomena related to a threshold in the star formation, while truncations are more likely a real drop in the stellar mass density of the disc associated with the maximum angular momentum of the stars. Key words: galaxies: formation, galaxies: fundamental parameters, galaxies: photometry, galaxies: spiral, galaxies: structure
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