2011MNRAS.415.2969D

Query : 2011MNRAS.415.2969D

2011MNRAS.415.2969D - Mon. Not. R. Astron. Soc., 415, 2969-2973 (2011/August-2)

The effect of a single supernova explosion on the cuspy density profile of a small-mass dark matter halo.

DE SOUZA R.S., RODRIGUES L.F.S., ISHIDA E.E.O. and OPHER R.

Abstract (from CDS):

Some observations of galaxies, and in particular dwarf galaxies, indicate a presence of cored density profiles in apparent contradiction with cusp profiles predicted by dark matter N-body simulations. We constructed an analytical model, using particle distribution functions (DFs), to show how a supernova (SN) explosion can transform a cusp density profile in a small-mass dark matter halo into a cored one. Considering the fact that an SN efficiently removes matter from the centre of the first haloes, we study the effect of mass removal through an SN perturbation in the DFs. We find that the transformation from a cusp into a cored profile occurs even for changes as small as 0.5 per cent of the total energy of the halo, which can be produced by the expulsion of matter caused by a single SN explosion.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): supernovae: general - galaxies: haloes - dark matter

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	ESO 323-64	GiC	13 01 10.6243152528	-38 54 56.238077664		15.72		14.24		~	14	0

Query : 2011MNRAS.415.2969D

Basic data :

ESO 323-64 -- Galaxy towards a Cluster of Galaxies

G (2016A&A,ESO,...), GiC ([DCL86]), * (Gaia)

13 01 10.6243152528 -38 54 56.238077664 (Optical) [ 4.1184 6.2582 90 ] C 2020yCat.1350....0G

12 58 23.0192636327 -38 38 47.692877060 [ 4.1184 6.2582 90 ]

305.0041425263574 +23.9169368266632 [ 4.1184 6.2582 90 ]

V(km/s) 14830 [11] / z(~) 0.050754 [0.000037] / cz 15215.65 [11.00] D 2011MNRAS.416.2840L

1.0 D 1989ESOLV.C......0L

0.443 0.310 45 (NIR) C 2006AJ....131.1163S

B 15.72 [~] C 1989ESOLV.C......0L

R 14.24 [~] C 1989ESOLV.C......0L

G 20.341307 [0.025024] C 2020yCat.1350....0G

J 12.336 [0.077] C 2006AJ....131.1163S

H 11.744 [0.098] C 2006AJ....131.1163S

K 11.121 [0.108] C 2006AJ....131.1163S

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`ESO 323-64`	`LEDA 44874`	`[DCL86] 458`
`ESO-LV 323-0640`	`2MASX J13011061-3854567`	`Gaia DR3 6141915800080103552`

References (14 between 1850 and 2026) (Total 14)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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Data at NED - NASA/IPAC Extragalactic Database : ESO 323-64

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ESO-LV 323-0640 2MASX J13011061-3854567 Gaia DR3 6141915800080103552

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