中文
相关论文

相关论文: Pacman (II): Application and Statistical Character…

200 篇论文

We propose a new method to calculate Faraday rotation measure maps from multi-frequency polarisation angle data. In order to solve the so called n-pi ambiguity problem which arises from the observationally ambiguity of the polarisation…

天体物理学 · 物理学 2009-11-10 K. Dolag , C. Vogt , T. A. Ensslin

We have observed 37 bright, polarized radio sources with the Allen Telescope Array (ATA) to present a novel analysis of their Faraday rotation properties. Each source was observed during the commissioning phase with 2 to 4 100-MHz bands at…

Using commissioning data from the first year of operation of the Canadian Hydrogen Intensity Mapping Experiment's (CHIME) Pulsar backend system, we conduct a systematic analysis of the Faraday Rotation Measure (RM) of the northern…

天体物理仪器与方法 · 物理学 2020-06-17 C. Ng , A. Pandhi , A. Naidu , E. Fonseca , V. M. Kaspi , K. W. Masui , R. Mckinven , A. Renard , P. Scholz , I. H. Stairs , S. P. Tendulkar , K. Vanderlinde

We aim to summarize the current state of knowledge regarding Galactic Faraday rotation in an all-sky map of the Galactic Faraday depth. For this we have assembled the most extensive catalog of Faraday rotation data of compact extragalactic…

We develop a novel maximum-a-posteriori method to measure magnetic power spectra from Faraday rotation data and implement it in the REALMAF code. A sophisticated model for the magnetic autocorrelation in real space permits us to alleviate…

宇宙学与河外天体物理 · 物理学 2015-05-14 Petr Kuchar , Torsten A. Ensslin

We present a Bayesian maximum likelihood analysis of Faraday rotation measure (RM) maps of extended radio sources to determine magnetic field power spectra in clusters of galaxies. Using this approach, it is possible to determine the…

天体物理学 · 物理学 2009-08-11 Corina Vogt , Torsten A. Ensslin

We compiled a catalog of Faraday rotation measures (RMs) for 4553 extragalactic radio point sources ublished in literature. These RMs were derived from multi-frequency polarization observations. The RM data are compared to those in the NRAO…

星系天体物理 · 物理学 2014-07-30 J. Xu , J. L. Han

We investigate how the imprint of Faraday rotation on radio spectra can be used to determine the geometry of radio sources and the strength and structure of the surrounding magnetic fields. We model spectra of Stokes Q and U for frequencies…

星系天体物理 · 物理学 2015-05-27 D. H. F. M. Schnitzeler , J. K. Banfield , K. J. Lee

The NRAO VLA Sky Survey (NVSS) Rotation Measure (RM) catalogue is invaluable for the study of cosmic magnetism. However, the RM values reported in it can be affected by n$\pi$-ambiguity, resulting in deviations of the reported RM from the…

星系天体物理 · 物理学 2019-05-22 Yik Ki Ma , S. A. Mao , Jeroen Stil , Aritra Basu , Jennifer West , Carl Heiles , Alex S. Hill , S. K. Betti

(Abridged) This paper introduces the formalism which connects between rotation measure ($\RM$) measurements for extragalactic sources and the cosmological magnetic field power spectrum. It is shown that the amplitude and shape of the…

天体物理学 · 物理学 2016-08-30 Tsafrir Kolatt

Faraday Rotation Measure (RM) Synthesis, as a method for analyzing multi-channel observations of polarized radio emission to investigate galactic magnetic fields structures, requires the definition of complex polarized intensity in the…

星系天体物理 · 物理学 2015-05-14 P. Frick , D. Sokoloff , R. Stepanov , R. Beck

Faraday rotation has been seen at millimeter wavelengths in several low luminosity active galactic nuclei, including Event Horizon Telescope (EHT) targets M87* and Sgr A*. The observed rotation measure (RM) probes the density, magnetic…

高能天体物理现象 · 物理学 2020-10-07 Angelo Ricarte , Ben S. Prather , George N. Wong , Ramesh Narayan , Charles Gammie , Michael Johnson

We study the polarization properties of 22 known rotating radio transients (RRATs) with the 64-m Parkes radio telescope and present the Faraday rotation measures (RMs) for the 17 with linearly polarized flux exceeding the off-pulse noise by…

We introduce a new cross-correlation method to detect and verify the astrophysical origin of Faraday Rotation (FR) in multiwavelength surveys. FR is well studied in radio astronomy from radio point sources but the $\lambda^{2}$ suppression…

天体物理仪器与方法 · 物理学 2018-01-18 Matthew Kolopanis , Philip Mauskopf , Judd Bowman

Faraday rotation of radio source polarization provides a measure of the integrated magnetic field along the observational lines of sight. We compare a new, large sample of Faraday rotation measures (RMs) of polarized extragalactic sources…

天体物理学 · 物理学 2009-11-13 Yongzhong Xu , Philipp P. Kronberg , Salman Habib , Quentin W. Dufton

Faraday rotation measure (RM) synthesis is an important tool to study and analyze galactic and extra-galactic magnetic fields. Since there is a Fourier relation between the Faraday dispersion function and the polarized radio emission, full…

天体物理仪器与方法 · 物理学 2015-05-28 Feng Li , Shea Brown , Tim J. Cornwell , Frank de Hoog

Measurements of the polarization of radio emission are subject to a number of depolarization effects such as bandwidth depolarization, which is caused by the averaging effect of a finite channel bandwidth combined with the…

天体物理仪器与方法 · 物理学 2023-02-08 Maxwell A. Fine , Cameron L. Van Eck , Luke Pratley

We present Faraday Rotation Measure (RM) values derived at L- and P-band as well as some 60 Stokes-parameter profiles, both determined from our longstanding Arecibo dual-frequency pulsar polarimetry programs. Many of the RM measurements…

高能天体物理现象 · 物理学 2023-09-27 Joanna Rankin , Arun Venkataraman , Joel M. Weisberg , Alice P. Curtin

We present a catalog of Faraday rotation measures (RMs) and redshifts for 4003 extragalactic radio sources detected at 1.4 GHz, derived by identifying optical counterparts and spectroscopic redshifts for linearly polarized radio sources…

宇宙学与河外天体物理 · 物理学 2020-04-02 Alison M. Hammond , Timothy Robishaw , B. M. Gaensler

The Polarisation Sky Survey of the Universe's Magnetism (POSSUM) will conduct a sensitive $\sim$1 GHz radio polarization survey covering 20 000 square degrees of the Southern sky with the Australian Square Kilometre Array Pathfinder…

‹ 上一页 1 2 3 10 下一页 ›