272 citations · 2k across the 34 of their papers we have counts for
8 papers · 1 filter
Massive star formation in galaxies with excess UV emission
Santiago Erroz-Ferrer, Johan H. Knapen, Elena A. N. Mohd Noh Velastín +2
From an analysis of almost 2000 GALEX images of galaxies with morphological types ranging from E to Sab, we have found a significant subset (28%) that show UV emission outside $R_{…
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…
A unified picture of breaks and truncations in spiral galaxies from SDSS and S^{4}G imaging
Ignacio Martín-Navarro, Judit Bakos, Ignacio Trujillo +21
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…
Hα Kinematics of S4G spiral galaxies-I. NGC 864
Santiago Erroz-Ferrer, Johan H. Knapen, Joan Font +22
We present a study of the kinematics of the isolated spiral galaxy NGC 864, using Hα Fabry-Perot data obtained with the GHαFaS instrument at the William Herschel Telescope in La Pa…
Early type galaxies with tidal debris and their scaling relations in the Spitzer Survey of Stellar Structure in Galaxies (S4G)
Taehyun Kim, Kartik Sheth, Joannah L. Hinz +21
Tidal debris around galaxies can yield important clues on their evolution. We have identified tidal debris in 11 early type galaxies (T \leq 0) from a sample of 65 early types draw…