Derives analytical solutions and fitting formulae for Lyα spectra under cylindrical geometry including recoil and velocity gradients, validated against Monte Carlo simulations.
The transition from Population III to normal galaxies: Ly-a and HeII 1640 emission and the ionising properties of high redshift starburst galaxies
4 Pith papers cite this work. Polarity classification is still indexing.
4
Pith papers citing it
abstract
We examine spectral properties of the ionising continua, the Lyman-break, and the Ly-a and HeII 1640 recombination lines in starbursts. The transition from primordial galaxies to currently observed metallicities, is examined. For the average properties of starbursts, the main findings are: 1) The Lyman continuum flux increases with decreasing metallicity. For a universal Salpeter IMF from 1-100 Msun the enhancement reaches typically a factor of ~3 between solar metallicity and Pop III objects. 2) While for metallicities Z >~ 1/50 Zsun the amplitude of the Lyman-break depends little on Z, a reduction by a factor ~2 is found at lower Z, due to the strong increase of the average stellar temperature. 3) Using theoretical models and empirical constraints we discuss the expected evolution of the hardness of He+ to H ionising photons with metallicity and possible uncertainties. We also provide a simple estimate of the possible impact of hot WR like stars on Q(He+)/Q(H) at very low metallicities. 4) Calibrations for star formation rate determinations from various recombination lines at all metallicities and for various IMFs are derived. For young bursts the maximum Ly-a equivalent width is shown to increase strongly with decreasing metallicity for the same IMF. However, for well known reasons, the Ly-a emission predicted likely represents an upper limit. Non-negligible HeII 1640 emission due to stellar photoionisation appears to be limited to very low metallicities and Population III objects.(abridged abstract)
years
2026 4verdicts
UNVERDICTED 4representative citing papers
FIRE-2 simulations show per-galaxy tidal disruption rates peak near z=2.5 at 4e-4 per year, correlate with SFR and central density, and remain high in satellite galaxies at early times.
Pixel-by-pixel SBI modeling recovers young massive Pop III clumps at up to 90 percent rate in favorable JWST-like configurations while integrated analyses fail due to contamination.
Analysis of JWST/NIRSpec Prism spectra for 25 z>=10 galaxies finds burstiness correlates with strong UV lines, short depletion times, and DLA-induced redshift biases of 0.39 and 0.14 with marginal impact on UV luminosity density.
citing papers explorer
-
Analytical and fitting formulae for solutions to Lyman-alpha radiative transfer equations: the effects of geometry, recoil, and velocity gradients
Derives analytical solutions and fitting formulae for Lyα spectra under cylindrical geometry including recoil and velocity gradients, validated against Monte Carlo simulations.
-
TDEs on FIRE: Illuminating the Cosmic Evolution of Tidal Disruption Rates
FIRE-2 simulations show per-galaxy tidal disruption rates peak near z=2.5 at 4e-4 per year, correlate with SFR and central density, and remain high in satellite galaxies at early times.
-
A Pixel-by-Pixel Path to Population III Discovery with JWST
Pixel-by-pixel SBI modeling recovers young massive Pop III clumps at up to 90 percent rate in favorable JWST-like configurations while integrated analyses fail due to contamination.
-
JWST spectroscopy of galaxies at $z>10$: Damped Ly$\alpha$ absorbers reveal efficient star formation and hidden redshift biases
Analysis of JWST/NIRSpec Prism spectra for 25 z>=10 galaxies finds burstiness correlates with strong UV lines, short depletion times, and DLA-induced redshift biases of 0.39 and 0.14 with marginal impact on UV luminosity density.