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High-precision Photometric Redshifts from Spitzer/IRAC: Extreme [3.6]-[4.5] Colors Identify Galaxies in the Redshift Range z~6.6-6.9
Renske Smit, Rychard J. Bouwens, Marijn Franx +7
One of the most challenging aspects of studying galaxies in the z>~7 universe is the infrequent confirmation of their redshifts through spectroscopy, a phenomenon thought to occur…
Morphology parameters: substructure identification in X-ray galaxy clusters
Viral Parekh, Kurt van der Heyden, Chiara Ferrari +2
In recent years multi-wavelength observations have shown the presence of substructures related to merging events in a high fraction of galaxy clusters. Clusters can be roughly grou…
The Mass Profile and Shape of Bars in the Spitzer Survey of Stellar Structure in Galaxies (S4G): Search for an Age Indicator for Bars
Taehyun Kim, Kartik Sheth, Dimitri A. Gadotti +24
We have measured the radial light profiles and global shapes of bars using two-dimensional 3.6 image decompositions for 144 face-on barred galaxies from the Spitzer Survey of…
Globular Cluster Populations: First Results from SG Early-Type Galaxies
Dennis Zaritsky, Manuel Aravena, E. Athanassoula +14
Using 3.6m images of 97 early-type galaxies, we develop and verify methodology to measure globular cluster populations from the SG survey images. We find that 1) the ratio,…
SNIa Host Galaxy Properties and the Dust Extinction Distribution
B. W. Holwerda, A. Reynolds, M. Smith +1
Supernovae Type Ia display a complex relation with their host galaxies. An important prior to the fit of the supernovae's lightcurve is the distribution of host galaxy extinction v…
Evidence for the concurrent growth of thick discs and central mass concentrations from SG imaging
Sébastien Comerón, Bruce G. Elmegreen, Heikki Salo +3
We have produced vertically integrated radial luminosity profiles of 69 edge-on galaxies from the Spitzer Survey of Stellar Structure in Galaxies (SG)…