2011MNRAS.414.3298N

Query : 2011MNRAS.414.3298N

2011MNRAS.414.3298N - Mon. Not. R. Astron. Soc., 414, 3298-3306 (2011/July-2)

Radial-orbit instability in modified newtonian dynamics.

NIPOTI C., CIOTTI L. and LONDRILLO P.

Abstract (from CDS):

The stability of radially anisotropic spherical stellar systems in modified Newtonian dynamics (MOND) is explored by means of numerical simulations performed with the N-body code N-MODY. We find that Osipkov–Merritt MOND models require for stability larger minimum anisotropy radii than equivalent Newtonian systems (ENSs) with the dark matter, and also than purely baryonic Newtonian models with the same density profile. The maximum value for stability of the Fridman–Polyachenko–Shukhman parameter in MOND models is lower than in ENSs, but higher than in Newtonian models with no dark matter. We conclude that MOND systems are substantially more prone to radial-orbit instability than ENSs with dark matter, while they are able to support a larger amount of kinetic energy stored in radial orbits than purely baryonic Newtonian systems. An explanation of these results is attempted and their relevance to the MOND interpretation of the observed kinematics of globular clusters, dwarf spheroidal and elliptical galaxies is briefly discussed.

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

Journal keyword(s): gravitation - instabilities - globular clusters: general - galaxies: kinematics and dynamics - 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	NGC 2419	GlC	07 38 08.51	+38 52 54.9			10.05			~	998	0

Query : 2011MNRAS.414.3298N

Basic data :

NGC 2419 -- Globular Cluster

GlC (2013A&A,GCl), Cl* (C,[KPS2012]), * ([HMT98])

07 38 08.51 +38 52 54.9 [ ] D 2006MNRAS.365.1357D

07 34 45.50 +38 59 44.3 [ ]

180.36964 +25.24161 [ ]

-0.02 -0.57 [0.02 0.01 90] C 2019MNRAS.482.5138B

V(km/s) -20.6 [0.2] / z(spectroscopic) -0.000069 [0.000001] / cz -20.60 [0.20] (Opt) A 2018MNRAS.478.1520B

0.003 [0.017] C 2021MNRAS.505.5978V

4.1 4.1 90 (Opt) D 1989Sci...246.1066D

V 10.05 [~] D 2012AJ....144..126D

K 7.82 [~] D 2008MNRAS.389.1924F

g (AB) 11.198 [0.009] C 2014MNRAS.437.1725V

r (AB) 10.727 [0.009] C 2014MNRAS.437.1725V

i (AB) 10.473 [0.009] C 2014MNRAS.437.1725V

z (AB) 10.371 [0.010] C 2014MNRAS.437.1725V

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`NGC 2419`	`GCl 12`	`[KPS2012] MWSC 1290`
`C 0734+390`	`[HMT98] AS 17-0`

References (998 between 1850 and 2026) (Total 998)
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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