The distribution of mass components in simulated disc galaxies

Isabel M. Santos-Santos; Chris B. Brook; Arianna DiCintio; J. Wadsley; R. Domínguez-Tenreiro; Stefan Gottloeber; G. Yepes

doi:10.1093/mnras/stv2335

The distribution of mass components in simulated disc galaxies

Isabel M. Santos-Santos, Chris B. Brook, Arianna DiCintio, J. Wadsley, R. Domínguez-Tenreiro, Stefan Gottloeber, G. Yepes

DARK

Abstract

Using 22 hydrodynamical simulated galaxies in a ΛCDM (Λcold dark matter) cosmological context we recover not only the observed baryonic Tully-Fisher relation, but also the observed 'mass discrepancy-acceleration' relation, which reflects the distribution of the main components of the galaxies throughout their discs. This implies that the simulations, which span the range 52 < V_flat < 222 km s^-1, where V_flat is the circular velocity at the flat part of the rotation curve, and match galaxy scaling relations, are able to recover the observed relations between the distributions of stars, gas and dark matter over the radial range for which we have observational rotation curve data. Furthermore, we explicitly match the observed baryonic to halo mass relation for the first time with simulated galaxies. We discuss our results in the context of the baryon cycle that is inherent in these simulations, and with regards to the effect of baryonic processes on the distribution of dark matter.

Originalsprog	Engelsk
Tidsskrift	Monthly Notices of the Royal Astronomical Society
Vol/bind	455
Udgave nummer	1
Sider (fra-til)	476-483
ISSN	0035-8711
DOI	https://doi.org/10.1093/mnras/stv2335
Status	Udgivet - 1 jan. 2016

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10.1093/mnras/stv2335

stv2335(1)Forlagets udgivne version, 1,19 MB

https://academic.oup.com/mnras/article-pdf/455/1/476/3084836/stv2335.pdf

Citationsformater

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abstract = "Using 22 hydrodynamical simulated galaxies in a ΛCDM (Λcold dark matter) cosmological context we recover not only the observed baryonic Tully-Fisher relation, but also the observed 'mass discrepancy-acceleration' relation, which reflects the distribution of the main components of the galaxies throughout their discs. This implies that the simulations, which span the range 52 < Vflat < 222 km s-1, where Vflat is the circular velocity at the flat part of the rotation curve, and match galaxy scaling relations, are able to recover the observed relations between the distributions of stars, gas and dark matter over the radial range for which we have observational rotation curve data. Furthermore, we explicitly match the observed baryonic to halo mass relation for the first time with simulated galaxies. We discuss our results in the context of the baryon cycle that is inherent in these simulations, and with regards to the effect of baryonic processes on the distribution of dark matter.",

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AU - Santos-Santos, Isabel M.

AU - Brook, Chris B.

AU - DiCintio, Arianna

AU - Wadsley, J.

AU - Domínguez-Tenreiro, R.

AU - Gottloeber, Stefan

AU - Yepes, G.

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Y1 - 2016/1/1

N2 - Using 22 hydrodynamical simulated galaxies in a ΛCDM (Λcold dark matter) cosmological context we recover not only the observed baryonic Tully-Fisher relation, but also the observed 'mass discrepancy-acceleration' relation, which reflects the distribution of the main components of the galaxies throughout their discs. This implies that the simulations, which span the range 52 < Vflat < 222 km s-1, where Vflat is the circular velocity at the flat part of the rotation curve, and match galaxy scaling relations, are able to recover the observed relations between the distributions of stars, gas and dark matter over the radial range for which we have observational rotation curve data. Furthermore, we explicitly match the observed baryonic to halo mass relation for the first time with simulated galaxies. We discuss our results in the context of the baryon cycle that is inherent in these simulations, and with regards to the effect of baryonic processes on the distribution of dark matter.

AB - Using 22 hydrodynamical simulated galaxies in a ΛCDM (Λcold dark matter) cosmological context we recover not only the observed baryonic Tully-Fisher relation, but also the observed 'mass discrepancy-acceleration' relation, which reflects the distribution of the main components of the galaxies throughout their discs. This implies that the simulations, which span the range 52 < Vflat < 222 km s-1, where Vflat is the circular velocity at the flat part of the rotation curve, and match galaxy scaling relations, are able to recover the observed relations between the distributions of stars, gas and dark matter over the radial range for which we have observational rotation curve data. Furthermore, we explicitly match the observed baryonic to halo mass relation for the first time with simulated galaxies. We discuss our results in the context of the baryon cycle that is inherent in these simulations, and with regards to the effect of baryonic processes on the distribution of dark matter.

U2 - 10.1093/mnras/stv2335

DO - 10.1093/mnras/stv2335

M3 - Journal article

SN - 0035-8711

VL - 455

SP - 476

EP - 483

JO - Royal Astronomical Society. Monthly Notices

JF - Royal Astronomical Society. Monthly Notices

IS - 1

ER -

The distribution of mass components in simulated disc galaxies

Abstract

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