TY - JOUR

T1 - Positive Lynden-Bell derivative as a ticket to the bar trap?

AU - Зозуля, Виктор Дмитриевич

AU - Смирнов, Антон Александрович

AU - Сотникова, Наталья Яковлевна

PY - 2024/3/8

Y1 - 2024/3/8

N2 - We have translated the results of N-body simulations of one barred model into the language of action variables and frequencies. Using this language, we analysed the behaviour of all orbits in the model on a large time-scale at the stage of a mature bar. We show that the orbits join the bar while preserving their adiabatic invariant, which takes into account the three-dimensional structure of the orbits. This allows us to apply the concept of the Lynden-Bell derivative for each of these orbits and trace how the sign of the derivative changes; i.e. how asynchronous changes in angular momentum Lz and orbital precession rate.

AB - We have translated the results of N-body simulations of one barred model into the language of action variables and frequencies. Using this language, we analysed the behaviour of all orbits in the model on a large time-scale at the stage of a mature bar. We show that the orbits join the bar while preserving their adiabatic invariant, which takes into account the three-dimensional structure of the orbits. This allows us to apply the concept of the Lynden-Bell derivative for each of these orbits and trace how the sign of the derivative changes; i.e. how asynchronous changes in angular momentum Lz and orbital precession rate.

KW - galaxies: bar

KW - galaxies: evolution

KW - galaxies: kinematics and dynamics

KW - methods: numerical

UR - https://www.mendeley.com/catalogue/bd4e2579-afcc-3362-abf0-e381726fce67/

U2 - 10.1093/mnras/stae702

DO - 10.1093/mnras/stae702

M3 - Article

VL - 529

SP - 4405

EP - 4424

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

IS - 4

ER -