Opin vísindi

ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization

ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization


Titill: ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization
Höfundur: Lovell, Mark   orcid.org/0000-0001-5609-514X
Zavala Franco, Jesus   orcid.org/0000-0003-4442-908X
Vogelsberger, Mark
Shen, Xuejian
Cyr-Racine, Francis-Yan
Pfrommer, Christoph
Sigurdson, Kris
Boylan-Kolchin, Michael
Pillepich, Annalisa
Útgáfa: 2018-03-28
Tungumál: Enska
Umfang: 2886-2899
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Svið: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Deild: Raunvísindastofnun (HÍ)
Science Institute (UI)
Birtist í: Monthly Notices of the Royal Astronomical Society;477(3)
ISSN: 0035-8711
1365-2966 (eISSN)
DOI: 10.1093/mnras/sty818
Efnisorð: Galaxies; Dark matter; Vetrarbrautir; Stjarneðlisfræði
URI: https://hdl.handle.net/20.500.11815/938

Skoða fulla færslu

Tilvitnun:

Lovell, M. R., Zavala, J., Vogelsberger, M., Shen, X., Cyr-Racine, F.-Y., Pfrommer, C., . . . Pillepich, A. (2018). ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization. Monthly Notices of the Royal Astronomical Society, 477(3), 2886-2899. doi:10.1093/mnras/sty818

Útdráttur:

We contrast predictions for the high-redshift galaxy population and reionization history between cold dark matter (CDM) and an alternative self-interacting dark matter model based on the recently developed ETHOS framework that alleviates the small-scale CDM challenges within the Local Group. We perform the highest resolution hydrodynamical cosmological simulations (a 36 Mpc3 volume with gas cell mass of ∼105M⊙ and minimum gas softening of ∼180 pc) within ETHOS to date – plus a CDM counterpart – to quantify the abundance of galaxies at high redshift and their impact on reionization. We find that ETHOS predicts galaxies with higher ultraviolet (UV) luminosities than their CDM counterparts and a faster build-up of the faint end of the UV luminosity function. These effects, however, make the optical depth to reionization less sensitive to the power spectrum cut-off: the ETHOS model differs from the CDM τ value by only 10 per cent and is consistent with Planck limits if the effective escape fraction of UV photons is 0.1–0.5. We conclude that current observations of high-redshift luminosity functions cannot differentiate between ETHOS and CDM models, but deep James Webb Space Telescope surveys of strongly lensed, inherently faint galaxies have the potential to test non-CDM models that offer attractive solutions to CDM's Local Group problems.

Athugasemdir:

Pre-print (óritrýnt handrit)

Skrár

Þetta verk birtist í eftirfarandi safni/söfnum:


Fletta

Um vefinn

Reikningurinn minn