Radio pulsars two old questions in blessed memory of Ya.N.Istomin Vasily Beskin12

2025-04-26 0 0 317.53KB 5 页 10玖币

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Radio pulsars — two old questions

(in blessed memory of Ya.N.Istomin)

Vasily Beskin1,2

1P.N.Lebedev Physical Institute, Moscow 119991, Russia,

beskin@lpi.ru

2Moscow Institute of Physics and Technology, Dolgoprudny 141701, Russia

Abstract. We draw attention to two unanswered questions in radio

pulsars’ theory. The ﬁrst one concerns the inclination angles χbetween

magnetic and rotation axes. We show that the very existence of interpulse

pulsars indicates that all possible angles are realized. The second one is

the question of the break of the death line on the P˙

P-diagram. We show

that this break can be easily explained by a very mechanism of secondary

plasma generation.

Keywords: neutron stars, radio pulsars.

1 Introduction

More than 50 years have passed since the discovery of radio pulsars. However,

we still do not know the mechanism of their coherent radio emission, e.g., the

direction of evolution of the inclination angle χ. Some questions, formulated in

the early years, were not further discussed. Here we outline the solution to one of

such forgotten questions connecting with the possible range of inclination angles.

The second question concerns the so-called death line, i.e., the line limiting

from below the population of pulsars on the P˙

P-diagram that has a break at

P≈0.1 s. As we show, this break can be easily explained by the well-known

feature of secondary plasma This work is dedicated to the blessed memory of

Ya.N. Istomin, as well as B.V. Komberg, with whom we discussed these issues

back in the 70s.

2 Inclination angle

If we take almost any catalog of the inclination angles χ, we ﬁnd that these

angles lie in a range of 0 < χ < 90◦. But this does not mean that there are no

arXiv:2210.05720v3 [astro-ph.HE] 3 Feb 2025

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Radiopulsars—twooldquestions(inblessedmemoryofYa.N.Istomin)VasilyBeskin1,21P.N.LebedevPhysicalInstitute,Moscow119991,Russia,beskin@lpi.ru2MoscowInstituteofPhysicsandTechnology,Dolgoprudny141701,RussiaAbstract.Wedrawattentiontotwounansweredquestionsinradiopulsars’theory.Thefirstoneconcernstheinclinat...

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Radio pulsars two old questions in blessed memory of Ya.N.Istomin Vasily Beskin12

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