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Unveiling the Structure of Barred Galaxies at 3.6 with the Spitzer Survey of Stellar Structure in Galaxies (SG): I. Disk Breaks
Taehyun Kim, Dimitri A. Gadotti, Kartik Sheth +24
We have performed two-dimensional multicomponent decomposition of 144 local barred spiral galaxies using 3.6 images from the Spitzer Survey of Stellar Structure in Galax…
Embedded Star Formation in S4G Galaxy Dust Lanes
Debra M. Elmegreen, Bruce G. Elmegreen, Santiago Erroz-Ferrer +22
Star-forming regions that are visible at 3.6 microns and Halpha but not in the u,g,r,i,z bands of the Sloan Digital Sky survey (SDSS), are measured in five nearby spiral galaxies t…
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…
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…