Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Heneka, Caroline [VerfasserIn]  |
| Cooray, Asantha [VerfasserIn]  |
| Feng, Chang [VerfasserIn]  |
Titel: | Probing the intergalactic medium with Lyα and 21 cm fluctuations |
Verf.angabe: | Caroline Heneka, Asantha Cooray, and Chang Feng |
E-Jahr: | 2017 |
Jahr: | 2017 October 11 |
Umfang: | 22 S. |
Fussnoten: | Gesehen am 01.09.2020 |
Titel Quelle: | Enthalten in: The astrophysical journal / 1 |
Ort Quelle: | London : Institute of Physics Publ., 1996 |
Jahr Quelle: | 2017 |
Band/Heft Quelle: | 848(2017,1) Artikel-Nummer 52, 22 Seiten |
ISSN Quelle: | 1538-4357 |
Abstract: | We study 21 cm and Ly α fluctuations, as well as H α , while distinguishing between Ly α emission of galactic, diffuse, and scattered intergalactic medium (IGM) origin. Cross-correlation information about the state of the IGM is obtained, testing neutral versus ionized medium cases with different tracers in a seminumerical simulation setup. In order to pave the way toward constraints on reionization history and modeling beyond power spectrum information, we explore parameter dependencies of the cross-power signal between 21 cm and Ly α , which displays a characteristic morphology and a turnover from negative to positive correlation at scales of a couple Mpc −1 . In a proof of concept for the extraction of further information on the state of the IGM using different tracers, we demonstrate the use of the 21 cm and H α cross-correlation signal to determine the relative strength of galactic and IGM emission in Ly α . We conclude by showing the detectability of the 21 cm and Ly α cross-correlation signal over more than one decade in scale at high signal-to-noise ratio for upcoming probes like SKA and the proposed all-sky intensity mapping satellites SPHEREx and CDIM, while also including the Ly α damping tail and 21 cm foreground avoidance in the modeling. |
DOI: | doi:10.3847/1538-4357/aa8eed |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Kostenfrei: Volltext ; Verlag: http://dx.doi.org/10.3847/1538-4357/aa8eed |
| Kostenfrei: Volltext: http://stacks.iop.org/0004-637X/848/i=1/a=52 |
| DOI: https://doi.org/10.3847/1538-4357/aa8eed |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1572646535 |
Verknüpfungen: | → Zeitschrift |
Probing the intergalactic medium with Lyα and 21 cm fluctuations / Heneka, Caroline [VerfasserIn]; 2017 October 11 (Online-Ressource)
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