New Paper: Population III observational signatures in the First Galaxies?

Earlier this week, we submitted a new paper (arXiv), led by Kirk Barrow, on possible Population III observational signatures in the first galaxies, working off the Renaissance Simulations. While most metal-free stars might be tens of solar masses, intermediate-mass stars (1-8 solar masses) are still possible.  Alone, they wouldn’t contribute significantly to the overall spectrum of the galaxy. However if they are part of a binary system, its material might overflow onto a companion black hole as it enters the giant phase. This is called a high-mass X-ray binary and might have observational consequences as they could occur more frequently in Population III. We look at a few case studies in simulation data, while also providing statistics on the overall population of early galaxies. For more information, take a look at the paper!

14 Sept 2017

  • (abs, pdf) Nakajima et al., The VIMOS Ultra Deep Survey: On the nature, ISM properties, and ionizing spectra of CIII]1909 emitters at z=2-4
  • (abs, pdf) Vallini et al., CO line emission from galaxies in the Epoch of Reionization
  • (abs, pdf) Hoag et al., HST Grism Observations of a Gravitationally Lensed Redshift 10 Galaxy
  • (abs, pdf) Levinson & Nakar, Limits on the growth rate of supermassive black holes at early cosmic epochs
  • (abs, pdf) Onoue et al., Minor Contribution of Quasars to Ionizing Photon Budget at z~6: Update on Quasar Luminosity Function at the Faint-end with Subaru/Suprime-Cam

13 Sept 2017

  • (abs, pdf) Chevallard et al., The ionization properties of extreme nearby star-forming regions
  • (abs, pdf) Schreiber et al., Jekyll & Hyde: quiescence and extreme obscuration in a pair of massive galaxies 1.5 Gyr after the Big Bang
  • (abs, pdf) Smith et al., Supernova feedback in numerical simulations of galaxy formation: separating physics from numerics
  • (abs, pdf) Reggiani et al., Constraining cosmic scatter in the Galactic halo through a differential analysis of metal-poor stars
  • (abs, pdf) Natale et al., Ray-tracing 3D dust radiative transfer with DART-Ray: code upgrade and public release