High plasma cut-off frequency blocks the radio emission from accreting millisecond X-ray pulsar SAX J1808.4-3658

doi:10.1007/s10509-020-03762-0

	High plasma cut-off frequency blocks the radio emission from accreting millisecond X-ray pulsar SAX J1808.4-3658
	Wang, S. Q.1,4; Zhang, C. M.2,4; Wang, D. H.3; Wang, N.1; Wang, J. B.1
刊名	Astrophysics and Space Science
	2020-03-01
卷号	365 期号:3 页码:47
关键词	(Stars:) pulsar: individual: SAX J1808.4-3658 Stars neutron X-rays stars X-rays binaries X-rays: general neutron-star magnetic-field optical counterpart xmm-newton binary evolution constraints transient sax-j1808.4-3658 oscillations Astronomy & Astrophysics
ISSN号	0004-640X
DOI	10.1007/s10509-020-03762-0
产权排序	1
文献子类	Article
英文摘要	SAX J1808.4-3658 is the first discovered transient accreting millisecond X-ray pulsar (AMXP) with a spin frequency of 401 Hz. It has been proposed that its radio pulses should be detected during the low state of X-ray emission, however there is no any successful evidence for its occurring a radio pulsar state with the sensitive radio telescopes. In this paper, we present a calculation of the plasma cut-off oscillation frequency of the accreting plasma above the magnetosphere of SAX J1808.4-3658, and obtain a limiting value of about similar to 5.9 GHz, corresponding to the lowest X-ray luminosity, which is higher than the favorite "search window" (e.g. 1.4 GHz) of radio pulsar surveys. Moreover, after comparing the pressure of the dipole electromagnetic radiation with that of the accreting matter, we find that the transformational condition from the accretion-powered to rotational-powered pulsar state implies a critical X-ray luminosity of 4.57x1033 ergs. We propose the observational suggestion for searching the radio pulsar state of SAX J1808.4-3658 is that the radio astronomers should use the telescope with high frequency receivers to search the transition from AMXP to radio MSP during the low X-ray luminosity phase (e.g. quiescence).
URL标识	查看原文
语种	英语
WOS记录号	WOS:000519722000001
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3893]
专题	新疆天文台_射电天文研究室
通讯作者	Wang, S. Q.; Zhang, C. M.
作者单位	1.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi, Xinjiang 830011, China; 2.CAS Key Lab of FAST, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China; 3.School of Physics and Electronic Science, Guizhou Normal University, Guiyang 550001, China 4.University of Chinese Academy of Sciences, Beijing 100049, China;
推荐引用方式 GB/T 7714	Wang, S. Q.,Zhang, C. M.,Wang, D. H.,et al. High plasma cut-off frequency blocks the radio emission from accreting millisecond X-ray pulsar SAX J1808.4-3658[J]. Astrophysics and Space Science,2020,365(3):47.
APA	Wang, S. Q.,Zhang, C. M.,Wang, D. H.,Wang, N.,&Wang, J. B..(2020).High plasma cut-off frequency blocks the radio emission from accreting millisecond X-ray pulsar SAX J1808.4-3658.Astrophysics and Space Science,365(3),47.
MLA	Wang, S. Q.,et al."High plasma cut-off frequency blocks the radio emission from accreting millisecond X-ray pulsar SAX J1808.4-3658".Astrophysics and Space Science 365.3(2020):47.