All posts by John Wise

Assistant Professor in Physics at Georgia Tech

16 Jun 2017

  • (abs, pdf) Stefanon et al., HST imaging of the brightest z~8-9 galaxies from UltraVISTA: the extreme bright end of the UV luminosity function
  • (abs, pdf) Smit et al., Measurement of rotation in two galaxies in the Epoch of Reionization from ALMA-detected [CII] emission
  • (abs, pdf) Rey & Pontzen, Quadratic genetic modifications: a streamlined route to cosmological simulations with controlled merger history
  • (abs, pdf) Matsuno et al., High-resolution spectroscopy of extremely metal-poor stars from SDSS/SEGUE. III. Unevolved Stars with $[\mathrm{Fe/H}]\lesssim -3.5$

12 Jun 2017

  • (abs, pdf) van der Burg et al., The abundance of ultra-diffuse galaxies from groups to clusters: UDGs are relatively more common in more massive haloes
  • (abs, pdf) Peñarrubia et al., Stellar envelopes of globular clusters embedded in dark mini-haloes
  • (abs, pdf) Smith et al., Radiative effects during the assembly of direct collapse black holes
  • (abs, pdf) Placco et al., RAVE J203843.2-002333: The first highly r-process-enhanced star identified in the RAVE survey

New Paper: Lyman-alpha trapping in massive BH formation

Last week, Qi Ge and I submitted a new paper (arXiv) on the importance of Lyman-alpha radiation trapping during the initial phases of massive black hole (BH) formation. Here we used a Monte Carlo method to trace photons in a pre-galactic cloud to see how they can suppress cooling that aids the gravitational collapse. We found that gas temporarily heats to 50,000 K from 10,000 K as it collapses, only to cool back down to its original 10,000 K temperature. This heating could change the characteristic mass scales of massive BH seeds and perhaps the initial BH spin. Continue reading New Paper: Lyman-alpha trapping in massive BH formation