2023ApJ...946...47Y

Query : 2023ApJ...946...47Y

2023ApJ...946...47Y - Astrophys. J., 946, 47 (2023/March-3)

Gravothermal Solutions of SIDM Halos: Mapping from Constant to Velocity-dependent Cross Section.

YANG S., DU X., ZENG Z.C., BENSON A., JIANG F., NADLER E.O. and PETER A.H.G.

Abstract (from CDS):

The scale-free gravothermal fluid formalism has long proved effective in describing the evolution of self-interacting dark matter halos with a constant dark matter particle cross section. However, whether the gravothermal fluid solutions match numerical simulations for velocity-dependent cross-section scenarios remains untested. In this work, we provide a fast mapping method that relates the constant-cross-section gravothermal solution to models with arbitrary velocity dependence in the cross section. We show that the gravothermal solutions after mapping are in good agreement with AREPON-body simulation results. We illustrate the power of this approach by applying this fast mapping method to a halo hosting a low-surface-brightness galaxy, UGC 128. We show that this fast mapping method can be used to constrain free parameters in a physically motivated cross-section model and illustrate the parameter space favored by the rotation curve measurement.

Abstract Copyright: © 2023. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Dark matter - Milky Way dark matter halo

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+06-01-019 LSB 00 13 50.90 +35 59 39.0   16.5       ~ 105 1

Query : 2023ApJ...946...47Y

Basic data :
MCG+06-01-019 -- Low Surface Brightness Galaxy
Other object types: otypes_help 		LSB (), G (2018ApJ,UGC,...), AG? (2020MNRAS)
ICRS coord. (ep=J2000) : 		00 13 50.90 +35 59 39.0 (Optical) [ ] C 2020MNRAS.494.1784A
FK4 coord. (ep=B1950 eq=1950) : 		00 11 14.50 +35 42 58.4 [ ]
Gal coord. (ep=J2000) : 		114.46096 -26.25852 [ ]
Radial velocity / Redshift / cz : 		V(km/s) 4531 [3] / z(emission) 0.015230 [0.000010] / cz 4565.76 [3.00]
   (Rad) C 2022ApJS..261...21Y
Morphological type: 		Sd E 2003A&A...412...45P
Angular size (arcmin): 		2.1 1.7 65 (~) D 2007ApJS..173..185G
Fluxes (1) :
B 16.5 [~] E ~
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Identifiers (5) :
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UGC 128 MCG+06-01-019 [M98c] 001112.0+354300
LEDA 913 [BTW2003] J0013+3606

References (105 between 1850 and 2026) (Total 105)
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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Collections of Measurements Description of Measurements

Velocities : 8    Distance : 3   

   

Observing logs
ISO : 4   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : MCG+06-01-019

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UGC 128

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