Merger

You are currently browsing articles tagged Merger.

Star-formation in the HI bridge between M81 and M82

November 20, 2007 by Thomas | No comments

de Mello et al.
http://arxiv.org/abs/0711.2685
They found both old and young stars in the region between the two galaxies and conclude that the former were flung out of either of the two while the latter have formed in the tidal tail.

Overall, there seems to be quite little going on there compared to other tidal tails (e.g. of mergers) where active star formation is often seen.

Tags: Galaxies, HST, Merger, Star Formation, Stellar Populations, UV

The MW is an exceptionnally quiet galaxy: implications for spiral formation

November 20, 2007 by Thomas | No comments

Puech et al.
http://arxiv.org/abs/0711.2881

Conference proceeding on how the MW is special in the sense that it forms little stars and therefore cannot have undergone a merger for a long time.

Tags: Galaxies, Kinematics, Merger, MilkyWay, TullyFisher

The role of minor mergers in the recent star formation history of early-type galaxies

November 12, 2007 by Thomas | No comments

Kaviraj et al.
http://arxiv.org/abs/0711.1493
Simulations on how minor mergers can explain the variation in UV-fluxes of ellipticals.

They say they cannot “rule out” gas accretion, but I wonder where the dividing line goes between a gas-rich dwarf being eaten and infall of gas.

Tags: Dwarf, Elliptical, Galaxies, Merger, Simulation, UltraViolet

2-Dimensional Kinematics of Simulated Disc Merger Remnants

October 31, 2007 by Thomas | No comments

Jesseit et al.
http://arxiv.org/abs/astro-ph/0606144

“real” simulations are the way to go for understanding the complex velocity fields of our BCGs.

Tags: BCG, Galaxies, Kinematics, Merger, Simulation