2025MNRAS.537..723B

Query : 2025MNRAS.537..723B

2025MNRAS.537..723B - Mon. Not. R. Astron. Soc., 537, 723-729 (2025/February-3)

Anomalous thermal relaxation in warm ion plasmas.

BARBA-GONZALEZ D., ALBERTUS C. and PEREZ-GARCIA M.A.

Abstract (from CDS):

We perform microscopic simulations of the thermal relaxation of warm neutral plasmas of astrophysical importance. Using molecular dynamics we study the thermal relaxation of a hot neutral fluid of finite-size neutron-rich ions kept in a fixed-wall cool box. We show how the interplay among particle size, Yukawa interaction range, and density are key to understand the features of the time-dependent thermal relaxation curve $T(t)$. We show that, under certain conditions, these systems exhibit faster cooling from increasingly larger initial temperature values. They also display non-Newtonian thermal behaviour, including oscillations, that can be effectively interpreted as the consequence of the existence of a non-trivial system memory function. Finally, we consider the impact of multicomponent admixtures in the simulated system. We discuss these results and their possible extensions to astrophysical scenarios, where screened plasmas with Yukawa-like electrostatic potentials are usually involved.

Abstract Copyright: © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): dense matter - plasmas - stars: neutron

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 UCAC4 456-107541 WD* 20 04 45.4936693608 +01 09 29.210538168       16.44   DA 13 0

Query : 2025MNRAS.537..723B

Basic data :
UCAC4 456-107541 -- White Dwarf
Other object types: otypes_help 		* (UCAC4,HD,...), WD* (2020MNRAS), WD? (2018MNRAS), NIR (2MASS), Opt (SDSS)
ICRS coord. (ep=J2000) : 		20 04 45.4936693608 +01 09 29.210538168 (Optical) [ 0.0512 0.0376 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		20 02 12.8036442628 +01 00 56.337975315 [ 0.0512 0.0376 90 ]
Gal coord. (ep=J2000) : 		042.5811520132452 -15.7011514060349 [ 0.0512 0.0376 90 ]
Proper motions mas/yr : 		-0.664 -28.166 [0.065 0.048 90] A 2020yCat.1350....0G
Parallaxes (mas): 		30.911 [0.0628] A 2020yCat.1350....0G
Spectral type: 		DA D 2020MNRAS.497..130T
Fluxes (9) :
R 16.44 [0.04] D 2012yCat.1322....0Z
G 16.720922 [0.002832] C 2020yCat.1350....0G
J 15.114 [0.332] D 2003yCat.2246....0C
H 15.590 [0.402] D 2003yCat.2246....0C
u (AB) 24.635 [9.793] E 2015ApJS..219...12A
g (AB) 16.847 [0.012] C 2015ApJS..219...12A
r (AB) 24.802 [6.816] E 2015ApJS..219...12A
i (AB) 16.227 [0.006] C 2015ApJS..219...12A
z (AB) 22.827 [4.084] E 2015ApJS..219...12A
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Identifiers (8) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

UCAC4 456-107541 2MASS J20044557+0109289 SDSS J200445.49+010929.0 Gaia DR3 4237555506083389568
HD 190412C SDSS J200445.49+010929.1 TIC 345571993 Gaia DR2 4237555506083389568

References (13 between 1850 and 2026) (Total 13)
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

Distance : 2    Fe/H : 1    Plx : 2    PM : 2    SpT : 3   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : UCAC4 456-107541

Link by name to the catalogue in VizieR :

UCAC4 456-107541 HD 190412C 2MASS J20044557+0109289 SDSS J200445.49+010929.1 SDSS J200445.49+010929.0
Gaia DR3 4237555506083389568 Gaia DR2 4237555506083389568

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