New paper: The Birth of a Galaxy – III

We have finally finished the finale in the The Birth of a Galaxy trilogy, where we further analyzed the data first presented in the second paper of the trilogy. In this paper, we convincingly demonstrate that the faintest galaxies play an important role during reionization, which contribute nearly 30% of the ionizing photon budget. This is important because previous studies of reionization usually ignored the smallest galaxies because they are easily suppressed by external and internal feedback. However, we find that they indeed do form at very high redshifts (z > 10), only to be suppressed as the universe is gradually heated and ionized by galaxies. Continue reading New paper: The Birth of a Galaxy – III

26 Mar 2014

  • (abs, pdf) Frebel et al., Segue 1: An Unevolved Fossil Galaxy from the Early Universe
  • (abs, pdf) Wise et al., The Birth of a Galaxy – III. Propelling reionisation with the faintest galaxies
  • (abs, pdf) Übler et al., Why stellar feedback promotes disc formation in simulated galaxies
  • (abs, pdf) Pacucci et al., The X-ray spectra of the first galaxies: 21cm signatures
  • (abs, pdf) Jiang et al., An Algorithm for Radiation Magnetohydrodynamics Based on Solving the Time-dependent Transfer Equation
  • (abs, pdf) Richings et al., Non-equilibrium chemistry and cooling in the diffuse interstellar medium – II. Shielded gas
  • (abs, pdf) Koleva et al., On the origin of bursts in blue compact dwarf galaxies: clues from kinematics and stellar populations
  • (abs, pdf) Lidz & Malloy, On Modeling and Measuring the Temperature of the z~5 IGM

Atlanta Science Festival

Today marks the beginning of the first Atlanta Science Festival, a week-long celebration of science and technology with dozens of activities happening around metro Atlanta. Members from the CRA will be leading a few events in the next week.

  • Tech Talks (Monday, March 24, 2014 – 6:30pm to 8:00pm; Georgia Tech Scheller College of Business Rm. 100): Atlanta science’s version of TedTalks with a competitive edge! Local science students battle one another through sharing short talks that communicate their research to public audiences.
  • Galaxy Collider: Come see the merger of galaxies unfold before your eyes! Throw galaxies at others and see them collide!
  • Spark Chamber: Did you know that there are tiny particles zipping through you all of the time at nearly the speed of light? Use our device to detect these particles and see the paths that they take.

The last two events will be a part of the Exploration Expo at Centennial Olympic Park on Saturday, March 29th, 11-4. Most of my group will be at the Galaxy Collider.  Come and join the fun!