Sökning: WFRF:(Bhagwat Aniket)
> (2022) >
Cospatial 21 cm and...
Cospatial 21 cm and metal-line absorbers in the epoch of reionization - I. Incidence and observability
-
- Bhagwat, Aniket (författare)
- Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany.
-
- Ciardi, Benedetta (författare)
- Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany.
-
- Zackrisson, Erik (författare)
- Uppsala universitet,Observationell astrofysik
-
visa fler...
-
- Schaye, Joop (författare)
- Leiden Univ, Leiden Observ, Niels Bohrweg 2, NL-2333 CA Leiden, Netherlands.
-
visa färre...
-
Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany Observationell astrofysik (creator_code:org_t)
- 2022-10-13
- 2022
- Engelska.
-
Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press. - 0035-8711 .- 1365-2966. ; 517:2, s. 2331-2342
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Overdense, metal-rich regions, shielded from stellar radiation might remain neutral throughout reionization and produce metal as well as 21 cm absorption lines. Simultaneous absorption from metals and 21 cm can complement each other as probes of underlying gas properties. We use Aurora, a suite of high-resolution radiation-hydrodynamical simulations of galaxy formation, to investigate the occurrence of such 'aligned' absorbers. We calculate absorption spectra for 21 cm, O I , C II , SI II, and FE II. We find velocity windows with absorption from at least one metal and 21 cm, and classify the aligned absorbers into two categories: 'aligned and cospatial absorbers' and 'aligned but not cospatial absorbers'. While 'aligned and cospatial absorbers' originate from overdense structures and can be used to trace gas properties, 'aligned but not cospatial absorbers' are due to peculiar velocity effects. The incidence of absorbers is redshift dependent, as it is dictated by the interplay between reionization and metal enrichment, and shows a peak at z approximate to 8 for the aligned and cospatial absorbers. While aligned but not cospatial absorbers disappear towards the end of reionization because of the lack of an ambient 21 cm forest, aligned and cospatial absorbers are associated with overdense pockets of neutral gas that can be found at lower redshift. We produce mock observations for a set of sightlines for the next generation of telescopes like the ELT and SICA1-LOW, finding that given a sufficiently bright background quasar, these telescopes will be able to detect both types of absorbers throughout reionization.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- intergalactic medium
- quasars: absorption lines
- dark ages
- reionization
- first stars
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas