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- W3099395836 endingPage "047" @default.
- W3099395836 startingPage "047" @default.
- W3099395836 abstract "In this paper, we study how the presence of bulge formation in galaxies influence their inner density profile, by means of an extended version of the Del Popolo (2009) semi-analytical model. As in Del Popolo (2009), the model takes into account the effect of baryons adiabatic contraction, ordered and random angular momentum, dynamical friction, and adds to the previous the effect of gas cooling, star formation, supernova feedback, and reionization. Our model shows that dwarf galaxies are bulgeless, in agreement with observations showing that the large majority of them has no stellar bulges, and are characterized by a flat profile well described by a Burkert profile. {We then studied the effect of a bulge, added to the {cored} DM halo, on the density profile}. In the case of a galaxy having a mass $10^{11} M_{odot}$ the inner density profile has a slope $alpha simeq 0.65$, for a bulge of $4.5 times 10^{9} M_{odot}$, while if bulge formation is not considered, the slope would be $alpha simeq 0.55$. If the bulge is larger, $6.5 times 10^{9} M_{odot}$ the slope is $alpha simeq 0.7$. In the case of a larger galaxy with $10^{12} M_{odot}$ the slope is $alpha simeq 0.85$, while in absence of bulge it is $alpha simeq 0.75$. We finally study how the inner slope $alpha$ changes with the bulge mass, and we find a correlation among the two quantities. The result shows that bulge formation has an important role in shaping the inner DM density profile in agreement with Inoue & Saitoh (2011) result. The result implies that going from Sc to SO Hubble type the slope is slightly steepening due to the bulge formation, and due to the fact that early type galaxies have larger bulges." @default.
- W3099395836 created "2020-11-23" @default.
- W3099395836 creator A5035112429 @default.
- W3099395836 creator A5090182049 @default.
- W3099395836 date "2014-01-29" @default.
- W3099395836 modified "2023-10-06" @default.
- W3099395836 title "Cusps and cores in the presence of galactic bulges" @default.
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- W3099395836 doi "https://doi.org/10.1088/1475-7516/2014/01/047" @default.
- W3099395836 hasPublicationYear "2014" @default.
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