Modelling galaxy clustering: is new physics needed in galaxy formation models?
Identifieur interne : 000128 ( Main/Exploration ); précédent : 000127; suivant : 000129Modelling galaxy clustering: is new physics needed in galaxy formation models?
Auteurs : Han-Seek Kim ; C. M. Baugh ; S. Cole ; C. S. Frenk ; A. J. Benson [États-Unis]Source :
- Monthly Notices of the Royal Astronomical Society [ 0035-8711 ] ; 2009-12-11.
English descriptors
Abstract
The clustering amplitude of galaxies depends on their intrinsic luminosity. We compare the properties of publicly available galaxy formation models with clustering measurements from the Two‐degree Field Galaxy Redshift Survey. The model predictions show the same qualitative behaviour as the data but fail to match the observations at the level of accuracy at which current measurements can be made. We demonstrate that this is due to the model producing too many satellite galaxies in massive haloes. We implement simple models to describe two new processes: satellite–satellite mergers and the tidal dissolution of satellites to investigate their impact on the predicted clustering. We find that both processes need to be included in order to produce a model which matches the observations.
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DOI: 10.1111/j.1365-2966.2009.15560.x
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We compare the properties of publicly available galaxy formation models with clustering measurements from the Two‐degree Field Galaxy Redshift Survey. The model predictions show the same qualitative behaviour as the data but fail to match the observations at the level of accuracy at which current measurements can be made. We demonstrate that this is due to the model producing too many satellite galaxies in massive haloes. We implement simple models to describe two new processes: satellite–satellite mergers and the tidal dissolution of satellites to investigate their impact on the predicted clustering. We find that both processes need to be included in order to produce a model which matches the observations.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Baugh, C M" sort="Baugh, C M" uniqKey="Baugh C" first="C. M." last="Baugh">C. M. Baugh</name><name sortKey="Cole, S" sort="Cole, S" uniqKey="Cole S" first="S." last="Cole">S. Cole</name><name sortKey="Frenk, C S" sort="Frenk, C S" uniqKey="Frenk C" first="C. S." last="Frenk">C. S. Frenk</name><name sortKey="Kim, Han Eek" sort="Kim, Han Eek" uniqKey="Kim H" first="Han-Seek" last="Kim">Han-Seek Kim</name></noCountry><country name="États-Unis"><noRegion><name sortKey="Benson, A J" sort="Benson, A J" uniqKey="Benson A" first="A. J." last="Benson">A. J. Benson</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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