Back to Search
Start Over
The dust attenuation law in $z\sim 6$ quasars
- Publication Year :
- 2021
-
Abstract
- We investigate the attenuation law in $z\sim 6$ quasars by combining cosmological zoom-in hydrodynamical simulations of quasar host galaxies, with multi-frequency radiative transfer calculations. We consider several dust models differing in terms of grain size distributions, dust mass and chemical composition, and compare the resulting synthetic Spectral Energy Distributions (SEDs) with data from bright, early quasars. We show that only dust models with grain size distributions in which small grains ($a < 0.1~\mu$m, corresponding to $\approx 60\%$ of the total dust mass) are selectively removed from the dusty medium provide a good fit to the data. Removal can occur if small grains are efficiently destroyed in quasar environments and/or early dust production preferentially results in large grains. Attenuation curves for these models are close to flat, and consistent with recent data; they correspond to an effective dust-to-metal ratio $f_d \simeq 0.38$, i.e. close to the Milky Way value.<br />STFC ERC
- Subjects :
- Milky Way
Extinction (astronomy)
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
methods: numerical
Settore FIS/05 - Astronomia e Astrofisica
quasars: general
0103 physical sciences
ISM [Galaxies]
Radiative transfer
010303 astronomy & astrophysics
Dust, extinction
Astrophysics::Galaxy Astrophysics
Physics
numerical [Methods]
010308 nuclear & particles physics
Attenuation
Spectral density
Astronomy and Astrophysics
Quasar
general [Quasars]
Astrophysics - Astrophysics of Galaxies
Grain size
Galaxy
Space and Planetary Science
radiative transfer
Astrophysics of Galaxies (astro-ph.GA)
dust, extinction
Astrophysics::Earth and Planetary Astrophysics
galaxies: ISM
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....d5b00744cb5b7bbfb9a2f1f9208944ec