Claire Lackner

TL;DR: This work presents a grasp planner that can consider the full range of parameters of a real hand and an arbitrary object, including physical and material properties as well as environmental obstacles and forces, and produce an output grasp that can be immediately executed.

TL;DR: The GRavitational lEnsing Accuracy Testing 3 (GREAT3) challenge as discussed by the authors is the third in a series of image analysis challenges, with a goal of testing and facilitating the development of methods for analyzing astronomical images that will be used to measure weak gravitational lensing.

Abstract: We examine galaxy formation in a cosmological AMR simulation, which includes two high resolution boxes, one centered on a 3 × 10 14 M⊙ cluster, and one centered on a void. We examine the evolution of 611 massive (M∗ > 10 10 M⊙) galaxies. We find that the fraction of the final stellar mass which is accreted from other galaxies is between 15 and 40% and increases with stellar mass. The accreted fraction does not depend strongly on environment at a given stellar mass, but the galaxies in groups and cluster environments are older and underwent mergers earlier than galaxies in lower density environments. On average, the accreted stars are � 2.5 Gyrs older, and � 0.15 dex more metal poor than the stars formed in-situ. Accreted stellar material typically lies on the outskirts of galaxies; the average half-light radius of the accreted stars is 2.6 times larger than that of the in-situ stars. This leads to radial gradients in age and metallicity for massive galaxies, in qualitative agreement with observations. Massive galaxies grow by mergers at a rate of approximately 2.6%/Gyr −1 . These mergers have a median (mass-weighted) mass ratio less than 0.26 ± 0.21, with an absolute lower limit of 0.20, for galaxies with M∗ � 10 12 M⊙. This suggests that major mergers do not dominate in the accretion history of massive galaxies. All of these results agree qualitatively with results from SPH simulations by Oser et al. (2010, 2012).

TL;DR: In this paper, a set of bulge-disc decompositions for a sample of 71,825 main-sample galaxies in the redshift range 0.003 < z < 0.05 were presented.

TL;DR: In this paper, the authors revisited a mechanism proposed by Ogilvie and Lin for tidal forcing of inertial waves, which are short-wavelength, low-frequency disturbances restored primarily by Coriolis rather than buoyancy forces.