Publication Details:
Journal or Publication Title:
Աստղաֆիզիկա = Астрофизика = Astrophysics
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Title:
О квазипериодических вариациях производной периода пульсаров
Other title:
On The Quasi-Periodic Variations Of Period Derivative Of Pulsars
Creator:
Contributor(s):
Գլխավոր խմբ․՝ Վ․ Հ․ Համբարձումյան (1965-1987) ; Լ․ Վ․ Միրզոյան (1988-1999) ; Դ․ Մ․ Սեդրակյան (2000-2017) ; Ա․ Գ․ Նիկողոսյան (2018-2024) ; Գ․ Տ․ Տեր-Ղազարյան (2025-)
Subject:
Uncontrolled Keywords:
вариации производной периода ; колебания Ткаченко
Coverage:
Abstract:
Observed data about quasi-periodic variations of period derivative of pulsars is considered. Characteristic radii of superfluid regions of pulsars are derived under the assumption that these variations are collective elastic oscillations of the superfliud vortex lattice (Tkachenko oscil-lations). The found values of radii are compared with values derived from X-ray data NICER and XMM-Newton X-ray satellites. These values are also compared with the values, obtained from equation of state. Simple model of Tkachenko oscillations requires further clarification. This method can be used for the approximate evaluation of radii of some pulsars.
Place of publishing:
Երևան