Jeremy Bailin

TL;DR: In this paper, the angular momenta of galaxy and cluster mass halos point parallel to filaments, while those of group and cluster masses halos show a very strong tendency to point perpendicular to the filaments.

TL;DR: The Parkes Galactic All-Sky Survey (GASS) as discussed by the authors is a survey of Galactic atomic hydrogen (HI) emission in the Southern sky covering declinations $2π$ steradians with an effective angular resolution of ~16', at a velocity resolution of 1.0 km/s, and with an rms brightness temperature noise of 57 mK.

TL;DR: In this article, the two spiral arms appear to start at the ends of a bar in the nuclear region and extend beyond the star-forming ring, and the star forming ring is very circular except for a region near M32 where it splits.

TL;DR: In this article, the authors examined radial and vertical metallicity gradients using a suite of disk galaxy hydrodynamical simulations, supplemented with two classic chemical evolution approaches to reconcile the differences existing between extant models and observations within the canonical “inside-out” disk growth paradigm.

TL;DR: In this paper, the alignment of the disk and inner halo appears to take place simultaneously through their joint evolution, and the lack of connection between these two regions of the halo should be taken into account when modeling tidal streams in the halos of disk galaxies and when calculating intrinsic alignments of disk galaxy based on the properties of dark matter halos.