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Morphological Parameters of Spitzer Survey of Stellar Structure in Galaxies (S4G)
B. W. Holwerda, J-C. Munoz-Mateos, S. Comeron +21
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), relativ…
X-ray nuclear activity in S4G barred galaxies: No link between bar strength and co-occurrent supermassive black hole fueling
Mauricio Cisternas, Dimitri Gadotti, Johan H. Knapen +23
Stellar bars can lead to gas inflow toward the center of a galaxy and stimulate nuclear star formation. However, there is no compelling evidence on whether they also feed a central…
Inner rings in disc galaxies: dead or alive
Sébastien Comerón
In this Letter, I distinguish "passive" inner rings as those with no current star formation, as distinct from "active" inner rings that have undergone recent star formation. I buil…
On the Origin of Lopsidedness in Galaxies as Determined from the Spitzer Survey of Stellar Structure in Galaxies (S4G)
Dennis Zaritsky, Heikki Salo, Eija Laurikainen +23
We study the m=1 distortions (lopsidedness) in the stellar components of 167 nearby galaxies that span a wide range of morphologies and luminosities. We confirm the previous findin…
The impact of bars on disk breaks as probed by S4G imaging
J. C. Muñoz-Mateos, K. Sheth, A. Gil de Paz +25
We have analyzed the radial distribution of old stars in a sample of 218 nearby face-on disks, using deep 3.6um images from the Spitzer Survey of Stellar Structure in Galaxies (S4G…
Breaks in thin and thick discs of edge-on galaxies imaged in the Spitzer Survey of Stellar Structure in Galaxies (S4G)
Sébastien Comerón, Bruce G. Elmegreen, Heikki Salo +17
Breaks in the radial luminosity profiles of galaxies have been until now mostly studied averaged over discs. Here we study separately breaks in thin and thick discs in 70 edge-on g…