Day 543

Monday.  Still need to catch up a week.

1311.0850
Using large galaxy surveys to distinguish z~0.5 quiescent galaxy models
Cohn, White

Consider how observations might distinguish different galaxy quenching scenarios.  Combine N-body sim and various prescriptions from literature to create several quiescent galaxy mock catalogues.  Each prescription uses a different set of galaxy properties (history, environment, centrality) to assign galaxies as quiescent.  Find how and how much the resulting quiescent galaxy distributions differ from each other, both intrinsically and observationally.  In addition to tracing observational consequences of different quenching mechanisms, results indicate which sorts of quenching models might be most readily disentangled by upcoming observations and which combinations of observational quantities might provide the most discriminatory power.

1311.0856
The AMIGA sample of isolated galaxies XII. revision of the isolation degree for AMIGA galaxies using the SDSS
Argudo-Fernández, et al

Isolation criteria: check [how?] within projected area of 1Mpc; 426 meet criteria; 347 fulfill the CIG (Catalogue of Isolated Galaxies) isolation criteria when a criterion about redshift difference is added.  Use of SDSS permits one to identify fainter and smaller-size satellites than in previous AMIGA works.  About 50% of the neighbors considered as potential companions in the photometric study are in fact background objects.  Find that about 92% of the neighbor galaxies that show recession velocities similar to the corresponding CIG galaxy are not considered by the CIG isolation criteria [CIG criteria in paper by Karachentseva, 1973] as potential companions, which may have a considerable influence on the evolution of the CIG galaxy.