dc.contributor |
Háskóli Íslands |
dc.contributor |
University of Iceland |
dc.contributor.author |
Lovell, Mark |
dc.contributor.author |
Zavala Franco, Jesus |
dc.contributor.author |
Vogelsberger, Mark |
dc.contributor.author |
Shen, Xuejian |
dc.contributor.author |
Cyr-Racine, Francis-Yan |
dc.contributor.author |
Pfrommer, Christoph |
dc.contributor.author |
Sigurdson, Kris |
dc.contributor.author |
Boylan-Kolchin, Michael |
dc.contributor.author |
Pillepich, Annalisa |
dc.date.accessioned |
2018-12-05T12:54:20Z |
dc.date.available |
2018-12-05T12:54:20Z |
dc.date.issued |
2018-03-28 |
dc.identifier.citation |
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 |
dc.identifier.issn |
0035-8711 |
dc.identifier.issn |
1365-2966 (eISSN) |
dc.identifier.uri |
https://hdl.handle.net/20.500.11815/938 |
dc.description |
Pre-print (óritrýnt handrit) |
dc.description.abstract |
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. |
dc.description.sponsorship |
MRL is supported by a COFUND/Durham Junior
Research Fellowship under EU grant 609412. MRL and
JZ acknowledge support by a Grant of Excellence from the
Icelandic Research Fund (grant number 173929051). MV
acknowledges support through an MIT RSC award, the support
of the Alfred P. Sloan Foundation, and support by
NASA ATP grant NNX17AG29G. MBK acknowledges support
from NSF grant AST-1517226 and from NASA grants
NNX17AG29G and HST-AR-13888, HST-AR-13896, HSTAR-
14282, and HST-AR-14554 from the Space Telescope
Science Institute, which is operated by AURA, Inc., under
NASA contract NAS5-26555. F.-Y. C.-R. acknowledges
the support of the National Aeronautical and Space Administration
ATP grant NNX16AI12G at Harvard University.
Some numerical calculations were run on using allocation
TG-AST140080 granted by the Extreme Science and Engineering
Discovery Environment (XSEDE), which is supported
by the NSF. |
dc.format.extent |
2886-2899 |
dc.language.iso |
en |
dc.publisher |
Oxford University Press (OUP) |
dc.relation.ispartofseries |
Monthly Notices of the Royal Astronomical Society;477(3) |
dc.rights |
info:eu-repo/semantics/openAccess |
dc.subject |
Galaxies |
dc.subject |
Dark matter |
dc.subject |
Vetrarbrautir |
dc.subject |
Stjarneðlisfræði |
dc.title |
ETHOS – an effective theory of structure formation: predictions for the high-redshift Universe – abundance of galaxies and reionization |
dc.type |
info:eu-repo/semantics/article |
dc.description.version |
Pre-Print |
dc.identifier.journal |
Monthly Notices of the Royal Astronomical Society |
dc.identifier.doi |
10.1093/mnras/sty818 |
dc.relation.url |
http://academic.oup.com/mnras/article-pdf/477/3/2886/24802986/sty818.pdf |
dc.contributor.department |
Raunvísindastofnun (HÍ) |
dc.contributor.department |
Science Institute (UI) |
dc.contributor.school |
Verkfræði- og náttúruvísindasvið (HÍ) |
dc.contributor.school |
School of Engineering and Natural Sciences (UI) |