2024A&A...689A.150D

Query : 2024A&A...689A.150D

2024A&A...689A.150D - Astronomy and Astrophysics, volume 689A150 (2024/9-1)

Dynamical friction in the quasi-linear formulation of modified Newtonian dynamics (QuMOND).

DI CINTIO P., RE F. and CHIARI C.

Abstract (from CDS):

Aims. We explore the dynamical friction on a test mass in gravitational systems in the quasi-linear formulation of modified Newtonian dynamics (QuMOND).
Methods. Exploiting the quasi-linearity of QuMOND, we derived a simple expression for the dynamical friction in akin to its Newtonian counterpart in the standard Chandrasekhar derivation. Moreover, adopting a mean field approach based on the Liouville equation, we were able to obtain a more rigorous (albeit in integral form) dynamical friction formula that can be evaluated numerically for a given choice of the QuMOND interpolation function.
Results. We find that our results are consistent with those of previous works. We observe that the dynamical friction is stronger in MOND with respect to a baryon-only Newtonian system with the same mass distribution. This amounts to a correction of the Coulomb logarithmic factor via additional terms that are proportional to the MOND radius of the system. Moreover, with the aid of simple numerical experiments, we confirm our theoretical predictions and those of previous works based on MOND.

Abstract Copyright: © The Authors 2024

Journal keyword(s): gravitation - methods: analytical - stars: kinematics and dynamics - galaxies: kinematics and dynamics

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	MCG-06-07-001	G	02 39 59.3	-34 26 57		9.02	7.4			~	1894	1

Query : 2024A&A...689A.150D

Basic data :

MCG-06-07-001 -- Galaxy

G (2008ApJ,ESO,...)

02 39 59.3 -34 26 57 [ 8000 8000 90 ] D 1982ESO...C......0L

02 37 55.0 -34 39 48 [ 8000 8000 90 ]

237.1038 -65.6515 [ 8000 8000 90 ]

0.382 -0.362 [0.002 0.003 90] C 2021ApJ...923...77P

V(km/s) 54.7 [0.2] / z(spectroscopic) 0.000182 [0.000001] / cz 54.70 [0.20] (Opt) A 2021ApJ...923...77P

dSph D 2012AJ....144....4M

27.5000 27.5000 90 (NIR) E 2008MNRAS.389.1924F

B 9.02 [~] C 1989ESOLV.C......0L

V 7.4 [0.3] D 2012AJ....144....4M

K 6.62 [~] D 2008MNRAS.389.1924F

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`NAME Fornax de`	`LEDA 10093`	`NAME For Dwarf Galaxy`	`NAME Fornax Dwarf Spheroidal Galaxy`
`Anon 0237-34`	`LEDA 10074`	`NAME Fornax Dwarf Galaxy`	`SGC 023755-3439.8`
`ESO 356-4`	`MCG-06-07-001`	`NAME Fornax Dwarf Elliptical`	`[FG85] 55`
`ESO-LV 356-0040`	`NAME Fornax dSph`	`NAME Fornax Dwarf Spheroidal`

References (1894 between 1850 and 2026) (Total 1894)
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 : MCG-06-07-001

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ESO-LV 356-0040

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