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SIBELIUS-DARK :
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McAlpine, Stuart
(författare)
SIBELIUS-DARK : a galaxy catalogue of the local volume from a constrained realization simulation
- Artikel/kapitelEngelska2022
Förlag, utgivningsår, omfång ...
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2022-02-08
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Oxford University Press (OUP),2022
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:su-204809
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https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-204809URI
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https://doi.org/10.1093/mnras/stac295DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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We present SIBELIUS-DARK, a constrained realization simulation of the local volume to a distance of 200 Mpc from the Milky Way. SIBELIUS-DARK is the first study of the ‘Simulations Beyond The Local Universe’ (SIBELIUS) project, which has the goal of embedding a model Local Group-like system within the correct cosmic environment. The simulation is dark-matter-only, with the galaxy population calculated using the semi-analytic model of galaxy formation, GALFORM. We demonstrate that the large-scale structure that emerges from the SIBELIUS constrained initial conditions matches well the observational data. The inferred galaxy population of SIBELIUS-DARK also match well the observational data, both statistically for the whole volume and on an object-by-object basis for the most massive clusters. For example, the K-band number counts across the whole sky, and when divided between the northern and southern Galactic hemispheres, are well reproduced by SIBELIUS-DARK. We find that the local volume is somewhat unusual in the wider context of ΛCDM: it contains an abnormally high number of supermassive clusters, as well as an overall large-scale underdensity at the level of ≈5 per cent relative to the cosmic mean. However, whilst rare, the extent of these peculiarities does not significantly challenge the ΛCDM model. SIBELIUS-DARK is the most comprehensive constrained realization simulation of the local volume to date, and with this paper we publicly release the halo and galaxy catalogues at z = 0, which we hope will be useful to the wider astronomy community.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Helly, John C.
(författare)
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Schaller, Matthieu
(författare)
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Sawala, Till
(författare)
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Lavaux, Guilhem
(författare)
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Jasche, JensStockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)(Swepub:su)jeja4711
(författare)
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Frenk, Carlos S.
(författare)
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Jenkins, Adrian
(författare)
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Lucey, John R.
(författare)
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Johansson, Peter H.
(författare)
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Stockholms universitetFysikum
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Monthly notices of the Royal Astronomical Society: Oxford University Press (OUP)512:4, s. 5823-58470035-87111365-2966
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McAlpine, Stuart
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Helly, John C.
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Schaller, Matthi ...
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Sawala, Till
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Lavaux, Guilhem
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Jasche, Jens
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visa fler...
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Frenk, Carlos S.
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Jenkins, Adrian
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Lucey, John R.
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Johansson, Peter ...
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Stockholms universitet