Claes-Erik Rydberg

The Spectral Evolution of the First Galaxies. I. James Webb Space Telescope Detection Limits and Color Criteria for Population III Galaxies

The James Webb Space Telescope (JWST) is expected to revolutionize our understanding of the high-redshift universe, and may be able to test the prediction that the first, chemically pristine (Popul ...

FINDING HIGH-REDSHIFT DARK STARS WITH THE JAMES WEBB SPACE TELESCOPE

The first stars in the history of the universe are likely to form in the dense central regions of similar to 10(5)-10(6) M-circle dot cold dark matter halos at z approximate to 10-50. The annihilat ...

Detection of isolated Population III stars with the James Webb Space Telescope

The first Population III stars are predicted to form in minihaloes at z approximate to 10-30. The James Webb Space Telescope (JWST), tentatively scheduled for launch in 2018, will probably be able ...

Observational constraints on supermassive dark stars

Some of the first stars could be cooler and more massive than standard stellar models would suggest, due to the effects of dark matter annihilation in their cores. It has recently been argued that ...

Metallicity evolution of direct collapse black hole hosts: CR7 as a case study

In this study we focus on the

Hunting for dark halo substructure using submilliarcsecond-scale observations of macrolensed radio jets

z\sim6.6

The onset of star formation 250 million years after the Big Bang

Lyman-

Lyman-Werner escape fractions from the first galaxies

\alpha

Can the James Webb Space Telescope detect isolated population III stars

CR7 consisting of clump A that is host to a potential direct collapse black hole (DCBH), and two metal enriched star forming clumps B and C. In contrast to claims that signatures of metals rule out the existence of DCBHs, we show that metal pollution of A from star forming clumps clumps B and C is inevitable, and that A can form a DCBH well before its metallicity exceeds the critical threshold of

A Search for Population III Galaxies in CLASH. I. Singly-imaged Candidates at High Redshift

10^{-5}-10^{-6}\ \rm Z_{\odot}