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相关论文: A New Model For The Loop-I (The North Polar Spur) …

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We have analyzed 16 years of observations dedicated to the Crab (pulsar + nebula) with the INTEGRAL SPI instrument to investigate its polarization properties. We find that the source presents a substantially polarized emission (PF = 24%) in…

高能天体物理现象 · 物理学 2019-09-25 E. Jourdain , J. P. Roques

The maps of intensity and polarization of the radio synchrotron emission from shell-type supernova remnants (SNRs) contain a considerable amount of information, although of not easy interpretation. With the aim of deriving constraints on…

高能天体物理现象 · 物理学 2016-03-23 Rino Bandiera , Oleh Petruk

The Sun is located inside an extremely low density and quite irregular volume of the interstellar medium, known as the Local Cavity (LC). It has been widely believed that some kind of interaction could be occurring between the LC and Loop…

星系天体物理 · 物理学 2012-05-18 Fábio P. Santos , Wagner Corradi , Wilson Reis

We present total-intensity and polarized-intensity images of the Cygnus Loop supernova remnant (SNR) observed by the Five-hundred-meter Aperture Spherical radio Telescope (FAST). The high angular-resolution and high-sensitivity images…

星系天体物理 · 物理学 2022-11-30 X. H. Sun , X. Y. Gao , W. Reich , P. Jiang , D. Li , H. Yan , X. H. Li

We present polarisation observations of five pulsars whose profiles exhibit two distinct emission regions separated by close to 180 degrees of longitude. We fitted the position angle of the linear polarisation using the rotating vector…

太阳与恒星天体物理 · 物理学 2015-05-14 M. J. Keith , S. Johnston , M. Kramer , P. Weltevrede

The recent confirmation of the bipolarity of the eROSITA bubbles suggests that the well-known North Polar Spur (NPS)/Loop I probably is a 10 kpc sized relic in the Galactic halo and not a small local structure near the Sun. By virtue of…

高能天体物理现象 · 物理学 2023-08-02 Guobin Mou , Jianhao Wu , Yoshiaki Sofue

Super-sensitive observations of bright pulsars by the Five-hundred-meter Aperture Spherical radio Telescope (FAST) have revealed weak radio emission continuously emerged in the rotation phases between the main pulse and interpulse of an…

高能天体物理现象 · 物理学 2025-04-10 P. F. Wang , J. L. Han

The North Polar Spur (NPS) is one of the largest structures observed in the Milky Way in both the radio and soft x-rays. While several predictions have been made regarding the origin of the NPS, modelling the structure is difficult without…

星系天体物理 · 物理学 2020-10-28 Kaustav K. Das , Catherine Zucker , Joshua S. Speagle , Alyssa Goodman , Gregory M. Green , João Alves

Neutron stars generate powerful winds of relativistic particles that form bright synchrotron nebulae around them. Polarimetry provides a unique insight into the geometry and magnetic configuration of the wind, but high-energy measurements…

天体物理学 · 物理学 2009-11-13 M. Forot , Philippe Laurent , I A. Grenier , C. Gouiffes , F. Lebrun

A variety of intriguing polarization patterns are created when polarization observations of the single pulses from radio pulsars are displayed in a two-dimensional projection of the Poincare sphere. In many pulsars, the projections produce…

天体物理学 · 物理学 2011-02-11 Mark M. McKinnon

A number of Anomalous X-ray Pulsars (AXPs) have recently been detected in the optical/IR wavelengths. We use their inferred brightness to place general constraints on any model for this emission within the magnetar framework. We find that…

天体物理学 · 物理学 2007-05-23 Feryal Ozel

We present detailed scattering models confirming that distinctive variations in polarization across the broad Halpha line, which are observed in a significant fraction of Seyfert 1 galaxies, can be understood in terms of a rotating…

天体物理学 · 物理学 2014-10-13 J. E. Smith , A. Robinson , S. Young , D. J. Axon , Elizabeth A. Corbett

Although the planetary nebula NGC 6781 appears to possess an elliptical morphology, its kinematic and emission characteristics are in many ways unusual, and it is possible that it may represent a bipolar source oriented close to the line of…

太阳与恒星天体物理 · 物理学 2011-06-21 J. P. Phillips , Gerardo Ramos-Larios , Martin A. Guerrero

The Stokes parameters of the pulsed synchrotron radiation produced in the striped pulsar wind model are computed and compared with optical observations of the Crab pulsar. We assume the main contribution to the wind emissivity comes from a…

天体物理学 · 物理学 2009-11-11 J. Petri , J. Kirk

We study linear polarization of optical emission from white dwarf (WD) binary system AR~Scorpii. The optical emission from this binary is modulating with the beat frequency of the system, and it is highly polarized, with the degree of the…

高能天体物理现象 · 物理学 2019-05-01 J. Takata , K. S. Cheng

Polarized radio emission has been mapped with great detail in several Galactic supernova remnants (SNRs), but has not yet been exploited to the extent it deserves. We have developed a method to model maps of the Stokes parameters for…

高能天体物理现象 · 物理学 2017-07-04 O. Petruk , R. Bandiera , V. Beshley , S. Orlando , M. Miceli

Synchrotron X-ray emission components were recently detected in many young supernova remnants (SNRs). There is even an emerging class - SN1006, RXJ1713.72-3946, Vela Jr, and others - that is dominated by non-thermal emission in X-rays, also…

高能天体物理现象 · 物理学 2015-05-13 A. M. Bykov , Yu. A. Uvarov , J. B. G. M. Bloemen , J. W. den Herder , J. S. Kaastra

We report a correspondence between giant, polarized microwave structures emerging north from the Galactic plane near the Galactic center and a number of GeV gamma-ray features, including the eastern edge of the recently-discovered northern…

高能天体物理现象 · 物理学 2012-02-17 David I. Jones , Roland M. Crocker , Wolfgang Reich , Jürgen Ott , Felix A. Aharonian

Neutron stars (NS's) with their strong magnetic fields and hot dense cores could be powerful probes of axions, a classic benchmark of feebly-coupled new particles, through abundant production of axions with the axion-nucleon coupling and…

高能物理 - 唯象学 · 物理学 2025-11-26 JiJi Fan , Lingfeng Li , Chen Sun

The polarized component of the diffuse radio synchrotron emission of our Galaxy shows structure, which is apparently unrelated to the structure in total intensity, on many scales. The structure in the polarized emission can be due to…

天体物理学 · 物理学 2009-11-10 M. Haverkorn , P. Katgert , A. G. de Bruyn