Miguel Querejeta

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The mid-infrared is an optimal window to trace stellar mass in nearby galaxies and the 3.6 m m IRAC band has been exploited to this effect, but such mass estimates can be biased by dust emission. We present our pipeline to reveal the old stellar flux at 3.6 μm and obtain stellar mass maps for more than 1600 galaxies available from the Spitzer Survey of(More)
The Spitzer Survey of Stellar Structure in Galaxies is a volume, magnitude, and size-limited survey of 2352 nearby galaxies with deep imaging at 3.6 and 4.5 μm. In this paper, we describe our surface photometry pipeline and showcase the associated data products that we have released to the community. We also identify the physical mechanisms leading to(More)
We describe and execute a novel approach to observationally estimate the lifetimes of giant molecular clouds (GMCs). We focus on the cloud population in the zone between the two main spiral arms in M51, i.e. the inter-arm region, where cloud destruction via shear and star formation feedback dominates over cloud formation processes. By monitoring the change(More)
The Spitzer Survey of Stellar Structure in Galaxies (S4G, Sheth et al. 2010) is a deep 3.6 and 4.5 μm imaging survey of 2352 nearby (< 40 Mpc) galaxies. We describe the S4G data analysis pipeline 4, which is dedicated to 2-dimensional structural surface Dept. of Physics, University of Oulu, FI-90014, Finland Finnish Centre for Astronomy with ESO (FINCA),(More)
The cloud-scale density, velocity dispersion, and gravitational boundedness of the interstellar medium (ISM) vary within and among galaxies. In turbulent models, these properties play key roles in the ability of gas to form stars. New high fidelity, high resolution surveys offer the prospect to measure these quantities across galaxies. We present a simple(More)
A number of simulators have argued that major mergers can sometimes preserve discs, but the possibility that they could explain the emergence of lenticular galaxies (S0s) has been generally neglected. In fact, observations of S0s reveal a strong structural coupling between their bulges and discs, which seems difficult to reconcile with the idea that they(More)
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