Day 261

Friday.  I've changed my policy to: "read the titles carefully, only read abstracts that have interesting-sounding titles.

Vacation -- Berkeley, then Hawaii.

1206.1593

Observational signatures of particle acceleration in supernova remnants

Helder et al

Review of current status of SNe remnants as the sources of Galactic cosmic rays.

1206.1594

Systematic variation of the stellar initial mass function with velocity dispersion in early-type galaxies

Ferreras et al

Letter: present observational evidence of a strong correlation between the slope of the IMF and central velocity dispersion for a comprehensive population of ETGs in the nearby (z<0.1) universe.  From SDSS spectra, stacked.  Results relevant for sigma > 150 km/s.  Gamma = 3.8 log sigma200 + 1.37 (more massive the halo, higher the Gamma, the IMF slope).

1206.1595

Far-infrared spectral energy distribution fitting for galaxies near and far

Casey

Model FIR SED fitting technique joining a modified, single dust temperature greybody, representing the reprocessed starburst emission in the whole galaxy, to a mid-IR power law, which approximates hot-dust emission from AGN heating or clumpy, hot star bursting regions.  Can be used to measure IR luminosities, dust temperatures, and dust masses with 3 to 1-+ FIR photometric measurements.  Comparative study highlights the impact of SED fitting assumptions on the measurement of physical properties such as IR luminosity (and IR-based SFR), dust temperature and dust mass, for both local and high-redshift galaxies.

1206.1596

Field O stars: formed in situ or as runaways?

Gvaramadze, Weidner, Kroupa, Pflamm-Altenburg

What seems like in-situ formation of massive O stars is actually probably runaways (checked by looking for bow shocks around them).

1206.1597

Relaxation and stripping: the evolution of sizes, dispersions and dark matter fractions in major and minor mergers of elliptical galaxies

Hilz, Naab, Ostriker, Thomas, Burkert, Jesseit

Major (1:1) and minor (1:10) mergers of pure bulges (+ embedded in DM haloes): violent relaxation and stripping leads to size evolution and a change of the DM fraction within the observable radius.