University of California, Riverside | 2017 Mar 22
[c][attachment=0]shivaei17[1].jpeg[/attachment][/c][hr][/hr]A UC Riverside-led team of astronomers have taken us a step closer to better understand the formation and destruction mechanisms of dust molecules in the distant universe
A molecule found in car engine exhaust fumes that is thought to have contributed to the origin of life on Earth has made astronomers heavily underestimate the amount of stars that were forming in the early Universe, a University of California, Riverside-led study has found.
That molecule is called polycyclic aromatic hydrocarbon (PAH). On Earth it is also found in coal and tar. In space, it is a component of dust, which along with gas, fills the space between stars within galaxies.
The study ... represents the first time that astronomers have been able to measure variations of PAH emissions in distant galaxies with different properties. It has important implications for the studies of distant galaxies because absorption and emission of energy by dust particles can change astronomers’ views of distant galaxies. ...
The MOSDEF Survey: Metallicity Dependence of PAH Emission at High Redshift and
Implications for 24 μm Inferred IR Luminosities and Star Formation Rates at z ~ 2 - Irene Shivaei et al
- Astrophysical Journal 837(2):157 (10 Mar 2017) DOI: 10.3847/1538-4357/aa619c
arXiv.org > astro-ph > arXiv:1609.04814 > 15 Sep 2016 (v1), 17 Feb 2017 (v2)