FREDDIE Extragalactic Discussion Group

Monday 3:30-4:30
in the Moon Room

Institute for Astronomy:
University of Hawai‘i at Mānoa

Speaker Next Week:


Jaime Forero-Romero: Universidad de los Andes; Bogota, Columbia

We are not the 99%: The Local Group in a Cosmological Context

The Milky Way and M31, the two dominant galaxies in the Local Group, have a series of characteristics that make them an atypical pair. Two of the most outstanding features are their kinematics and highly planar satellite distributions. We use these two attributes to place the Local Group in an explicit cosmological context provided by simulations performed in the Cold Dark Matter structure formation paradigm. In this context the Local Group turns out to be an extreme outlier at the current moment in cosmic history. This result can be used either to constrain the detailed formation history of our Galaxy or to challenge the ability of LCDM to describe small scale structures in the Universe.

Papers to Discuss:

Barrows+17: Observational Constraints on Correlated Star Formation and Active Galactic Nuclei in Late-Stage Galaxy Mergers

Kauffmann17: The Physical Properties of Galaxies with Unusually Red Mid-Infrared Colours

Kocevski+17: CANDELS: Elevated Black Hole Growth in the Progenitors of Compact Quiescent Galaxies at z~2

Nick Lee+17: The fine line between normal and starburst galaxies

Terrazas+2017: Supermassive Black Holes as the Regulators of Star Formation in Central Galaxies

Eales+2017: The New Galaxy Evolution Paradigm Revealed by the Herschel Surveys