# 31 Dec 2013

• (abs, pdf) Teuben et al., Ideas for Advancing Code Sharing (A Different Kind of Hack Day)
• (abs, pdf) Mushotzky et al., Do Most Active Galactic Nuclei Live in High Star Formation Nuclear Cusps?

# 24 Dec 2013

• (abs, pdf) McKinney et al., Three-Dimensional General Relativistic Radiation Magnetohydrodynamical Simulation of Super-Eddington Accretion, using a new code HARMRAD with M1 Closure
• (abs, pdf) Vanzella et al., LBT/MODS1 spectroscopic confirmation of two faint sources at z=6.4 magnified by the CLASH / Frontier Fields cluster MACSJ0717.5+3745: towards the characterization of star-forming galaxies at the epoch of reionization
• (abs, pdf) Whalen et al., Detecting Ancient Supernovae at z ~ 5 – 12 with CLASH
• (abs, pdf) Inoue et al., Upper Bound on the First Star Formation History

# 20 Dec 2013

• (abs, pdf) Tescari et al., Simulated star formation rate functions at $\bf{z\sim4-7}$, and the role of feedback in high-$\bf{z}$ galaxies
• (abs, pdf) Offner et al., The Origin and Universality of the Stellar Initial Mass Function
• (abs, pdf) Whalen et al., Pair-Instability Supernovae in the Local Universe
• (abs, pdf) Padoan et al., The Star Formation Rate of Molecular Clouds
• (abs, pdf) Bowler et al., The bright end of the galaxy luminosity function at z ~ 7: before the onset of mass quenching?

# 19 Dec 2013

• (abs, pdf) Ali-Haïmoud et al., A new light on 21 cm intensity fluctuations from the dark ages
• (abs, pdf) Regan et al., Numerical resolution effects on simulations of massive black hole seeds
• (abs, pdf) Komiya et al., Current signatures and search for Pop. III stars in the Local Universe

# 18 Dec 2013

• (abs, pdf) Zemp, On Physical Scales of Dark Matter Haloes
• (abs, pdf) Thompson et al., WFIRST Science with a Probe Class Mission

# 17 Dec 2013

• (abs, pdf) Johnson et al., Discovery of a transparent sightline at {\rho} &lt; 20 kpc from an interacting pair of galaxies
• (abs, pdf) Ball, CANFAR+Skytree: A Cloud Computing and Data Mining System for Astronomy
• (abs, pdf) Ball, Focus Demo: CANFAR+Skytree: A Cloud Computing and Data Mining System for Astronomy

# 16 Dec 2013

• (abs, pdf) Kanekar et al., The spin temperature of high-redshift damped Lyman-$\alpha$ systems
• (abs, pdf) Lapi et al., The Coevolution of Supermassive Black Holes and Massive Galaxies at High Redshift

# 13 Dec 2013

• (abs, pdf) Maschberger et al., The relation between accretion rates and the initial mass function in hydrodynamical simulations of star formation
• (abs, pdf) Zhang et al., Radiation Transfer of Models of Massive Star Formation. III. The Evolutionary Sequence
• (abs, pdf) Rémy-Ruyer et al., Gas-to-Dust mass ratios in local galaxies over a 2 dex metallicity range
• (abs, pdf) Fernandez et al., Stars and Reionization: The Cross-Correlation of the 21cm Line and the Near Infrared Background

# 12 Dec 2013

• (abs, pdf) Stacy et al., The Mutual Interaction Between Population III Stars and Self-Annihilating Dark Matter
• (abs, pdf) Cunnama et al., The environmental dependence of neutral hydrogen in the GIMIC simulations
• (abs, pdf) Dobbs et al., Formation of Molecular Clouds and Global Conditions for Star Formation

# New paper: On the contribution of active galactic nuclei to reionization

Reionization is an extended process where the whole universe transitions from neutral to ionized between 300 and 1,000 million years after the Big Bang. While it has been established that galaxies are the main drivers of reionization and that active galactic nuclei (AGN) are unimportant during this process, very few have made an effort to quantify the exact contribution to the reionization history. In our paper, we find that AGN only increases the optical depth to Thomson scattering by ~2% under the most optimal conditions, thus strengthening the need for other sources beyond observed AGN and galaxies to match the observed optical depth by WMAP and Planck. This paper was primarily written by Rachel Grissom, who is a 2nd year graduate student at the CRA, and it is her first paper. Congratulations!