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We discuss observations of the linearly polarized component of the diffuse galactic radio background. These observations, with an angular resolution of 4', were made with the Westerbork Synthesis Radio Telescope (WSRT) in 5 frequency bands…

Astrophysics · Physics 2007-05-23 M. Haverkorn , P. Katgert , A. G. de Bruyn

It is not yet clear whether magnetic fields play an essential role in shaping planetary nebulae (PNe), or whether stellar rotation alone and/or a close binary companion can account for the variety of the observed nebular morphologies. In a…

Solar and Stellar Astrophysics · Physics 2014-10-22 M. Steffen , S. Hubrig , H. Todt , M. Schöller , W. -R. Hamann , C. Sandin , D. Schönberner

We aim to study the polarization and magnetic field properties of the SNR HB 9 using new 21-cm continuum cube data from the Five-hundred-meter Aperture Spherical radio telescope (FAST). We computed the Faraday depth at 21 cm, and…

Astrophysics of Galaxies · Physics 2025-05-21 Li Xiao , Ming Zhu , Xiao-Hui Sun , Wolfgang Reich , Patricia Reich , Peng Jiang , Chun Sun

Imaging polarimetry of the 0.85mm continuum emission in the NGC 7538 region, obtained with the SCUBA Polarimeter, is presented. The polarization map is interpreted in terms of thermal radiation by magnetically aligned dust grains. Two…

Astrophysics · Physics 2009-11-06 M. Momose , M. Tamura , O. Kameya , J. S. Greaves , A. Chrysostomou , J. H. Hough , J. -I. Morino

We present the first interferometric polarization map of the W51 e1/e2 molecular cores obtained with the BIMA array at 1.3 mm wavelength with approximately 3 arcsecond resolution. The polarization angle varies smoothly across the double…

Astrophysics · Physics 2009-11-06 Shih-Ping Lai , Richard M. Crutcher , Jose M. Girart , Ramprasad Rao

Magnetic fields play important roles in many astrophysical processes. However, there is no universal diagnostic for the magnetic fields in the interstellar medium (ISM) and each magnetic tracer has its limitation. Any new detection method…

Astrophysics of Galaxies · Physics 2017-12-19 Heshou Zhang , Huirong Yan

We describe IXPE polarization observations of the Pulsar Wind Nebula (PWN) MSH15-52, the `Cosmic Hand'. We find X-ray polarization across the PWN, with B field vectors generally aligned with filamentary X-ray structures. High significance…

High Energy Astrophysical Phenomena · Physics 2023-09-29 Roger W. Romani , Josephine Wong , Niccolo Di Lalla , Nicola Omodei , Fei Xie , C. -Y. Ng , Riccardo Ferrazzoli , Alessandro Di Marco , Niccolo Bucciantini , Maura Pilia , Patrick Slane , Martin C. Weisskopf , Simon Johnston , Marta Burgay , Deng Wei , Yi-Jung Yang , Shumeng Zhang , Lucio A. Antonelli , Matteo Bachetti , Luca Baldini , Wayne H. Baumgartner , Ronaldo Bellazzini , Stefano Bianchi , Stephen D. Bongiorno , Raffaella Bonino , Alessandro Brez , Fiamma Capitanio , Simone Castellano , Elisabetta Cavazzuti , Chien-Ting Chen , Nicolo Cibrario , Stefano Ciprini , Enrico Costa , Alessandra De Rosa , Ettore Del Monte , Laura Di Gesu , Immacolata Donnarumma , Victor Doroshenko , Michal Dovčiak , Steven R. Ehlert , Teruaki Enoto , Yuri Evangelista , Sergio Fabiani , Javier A. Garcia , Shuichi Gunji , Kiyoshi Hayashida , Jeremy Heyl , Wataru Iwakiri , Ioannis Liodakis , Philip Kaaret , Vladimir Karas , Dawoon E. Kim , Takao Kitaguchi , Jeffery J. Kolodziejczak , Henric Krawczynski , Fabio La Monaca , Luca Latronico , Grzegorz Madejski , Simone Maldera , Alberto Manfreda , Frederic Marin , Andrea Marinucci , Alan P. Marscher , Herman L. Marshall , Francesco Massaro , Giorgio Matt , Riccardo Middei , Ikuyuki Mitsuishi , Tsunefumi Mizuno , Fabio Muleri , Michela Negro , Stephen L. O'Dell , Chiara Oppedisano , Luigi Pacciani , Alessandro Papitto , George G. Pavlov , Matteo Perri , Melissa Pesce-Rollins , Pierre-Olivier Petrucci , Andrea Possenti , Juri Poutanen , Simonetta Puccetti , Brian D. Ramsey , John Rankin , Ajay Ratheesh , Oliver J. Roberts , Carmelo Sgro , Paolo Soffitta , Gloria Spandre , Douglas A. Swartz , Toru Tamagawa , Fabrizio Tavecchio , Roberto Taverna , Yuzuru Tawara , Allyn F. Tennant , Allyn F. Tennant , Francesco Tombesi , Alessio Trois , Sergey Tsygankov , Roberto Turolla , Jacco Vink , Kinwah Wu , Silvia Zane

Pulsars moving through ISM produce bow shocks detected in hydrogen H$\alpha$ line emission. The morphology of the bow shock nebulae allows one to probe the properties of ISM on scales $\sim 0.01$ pc and smaller. We performed 2D RMHD…

High Energy Astrophysical Phenomena · Physics 2020-06-17 Maxim Barkov , Maxim Lyutikov , Dmitry Khangulyan

The polarization of SN 2002ic interacting with a dense circumstellar envelope is calculated in the context of the asymmetric version of a previously proposed spherical interaction model. The circumstellar envelope is taken to be oblate. The…

Astrophysics · Physics 2008-11-26 Nikolai N. Chugai , Roger A. Chevalier

Cometary globules, dense molecular gas structures exposed to the UV radiation, are found inside HII regions. Understanding the nature and origin of these structures through a kinematic study of the molecular gas is useful to advance in our…

Astrophysics of Galaxies · Physics 2020-01-08 M. E. Ortega , S. Paron , M. B. Areal , M. Rubio

The NIKA2 polarization channel at 260 GHz (1.15 mm) has been proposed primarily to observe galactic star-forming regions and probe the critical scales between 0.01-0.05 pc at which magnetic field lines may channel the matter of interstellar…

Within four nearby (d < 160 pc) molecular clouds, we statistically evaluate the structure of the interstellar magnetic field, projected on the plane of the sky and integrated along the line of sight, as inferred from the polarized thermal…

In soft X-rays, the Monogem ring is an object with a diameter of 25{\deg} located in the Galactic anti-centre. It is believed to be a faint, evolved, local supernova remnant. The ring is also visible in the far-ultraviolet, and a few…

Astrophysics of Galaxies · Physics 2020-09-23 Wolfgang Reich , Patricia Reich , Xiaohui Sun

To study some characteristics of the interstellar medium, observational data of pulsars with large Faraday rotation values (|RM|> 300 rad / m2) were used. It was suggested and justified that large |RM| values can be due to the contribution…

Astrophysics of Galaxies · Physics 2018-08-13 R. R. Andreasyan , H. R. Andreasyan , G. M. Paronyan

We present a statistical analysis of the interstellar medium (ISM) polarization from the largest compilation available of starlight data, which comprises ~ 5500 stars. The measured correlation between the mean polarization degree and…

Astrophysics · Physics 2014-10-13 Pablo Fosalba , Alex Lazarian , Simon Prunet , Jan A. Tauber

Many pulsars propagate through the interstellar medium (ISM) with supersonic velocities, and their pulsar winds interact with the interstellar medium (ISM), forming bow shocks and magnetotails (PWN). We model the propagation of pulsars…

High Energy Astrophysical Phenomena · Physics 2019-01-23 O. D. Toropina , M. M. Romanova , R. V. E. Lovelace

Here we aim to study the physical and kinematical characteristics of the unstudied old planetary nebula (PN) PN G342.0-01.7, which shows evidence of interaction with its surrounding interstellar medium. We used Integral Field Spectra from…

Astrophysics of Galaxies · Physics 2015-11-04 Alaa Ali , Morsi A. Amer , M. A. Dopita , F. P. A. Vogt , H. M. Basurah

We aim to study the spatial distribution of the physical and chemical properties of the X-ray emitting plasma of the supernova remnant G272.2-3.2, in order to get important constraints on its ionization stage, on the progenitor supernova…

High Energy Astrophysical Phenomena · Physics 2015-06-12 E. Sánchez-Ayaso , J. A. Combi , F. Bocchino , J. F. Albacete-Colombo , J. López-Santiago , J. Martí , E. Castro

We report the detection of near-IR H$_2$ emission from the low-ionization structures (knots) in two planetary nebulae. The deepest ever, high-angular resolution H$_2$ 1-0 S(1) at 2.122$\mu$, H$_2$ 2-1 S(1) at 2.248$\mu$ and Br$\gamma$…

Solar and Stellar Astrophysics · Physics 2016-12-21 Stavros Akras , Denise R. Gonçalves , Gerardo Ramos-Larios
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