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Observations of cosmic microwave background polarisation, essential for probing a potential phase of inflation in the early universe, suffer from contamination by polarised emission from the Galactic interstellar medium. This work combines…

Cosmology and Nongalactic Astrophysics · Physics 2024-09-25 Jacques Delabrouille

Filamentary structures in neutral hydrogen (HI) emission are well aligned with the interstellar magnetic field, so HI emission morphology can be used to construct templates that strongly correlate with measurements of polarized thermal dust…

Astrophysics of Galaxies · Physics 2024-09-04 George Halal , Susan E. Clark , Ari Cukierman , Dominic Beck , Chao-Lin Kuo

We have obtained the polarization data cube of the VRO 42.05.01 supernova remnant at 1240 MHz using the Five-hundred-meter Aperture Spherical radio Telescope (FAST). Three-dimensional Faraday Synthesis is applied to the FAST data to derive…

Astrophysics of Galaxies · Physics 2023-06-05 Li Xiao , Ming Zhu , Xiao-Hui Sun , Peng Jiang , Chun Sun

The Radio Arc is one of the brightest systems of non-thermal filaments (NTFs) in the Galactic Center, located near several prominent HII regions (Sickle and Pistol) and the Quintuplet stellar cluster. We present observations of the Arc NTFs…

Astrophysics of Galaxies · Physics 2019-11-06 Dylan M. Paré , Cornelia C. Lang , Mark R. Morris , Hailey Moore , Sui Ann Mao

The Sun is an active star that often produces numerous bursts of electromagnetic radiation at radio wavelengths. Low frequency radio bursts have recently been brought back to light with the advancement of novel radio interferometers.…

We present ISOPHOT observations between 60 and 200 microns and a near-infrared extinction map of LDN 1780. We have used the ISOPHOT data together with the 25, 60 and 100 microns IRIS maps to disentangle the warm and cold components of large…

Astrophysics · Physics 2009-11-11 C. del Burgo , L. Cambresy

An analysis of structure in rotation measure (RM) across the sky based on the RM catalog of Taylor et al. (2009) is presented. Several resolved RM structures are identified with structure in the local ISM, including radio loops I, II, and…

Astrophysics of Galaxies · Physics 2015-05-20 J. M. Stil , A. R. Taylor , C. Sunstrum

Context. HI filaments are closely related to dusty magnetized structures that are observable in the far infrared (FIR). Recently it was proposed that the coherence of oriented HI structures in velocity traces the line of sight magnetic…

Astrophysics of Galaxies · Physics 2022-05-04 P. M. W. Kalberla , J. Kerp , U. Haud

Cosmological simulations predict the presence of warm hot thermal gas in the cosmic filaments that connect galaxy clusters. This gas is thought to constitute an important part of the missing baryons in the Universe. In addition to the…

We present the first degree-scale tomography map of the dusty magnetized interstellar medium (ISM) from stellar polarimetry and distance measurements. We used the RoboPol polarimeter at Skinakas Observatory to conduct a survey of starlight…

Magnetic fields permeate the diffuse interstellar medium (ISM) of the Milky Way, and are essential to explain the dynamical evolution and current shape of the Galaxy. Magnetic fields reveal themselves via their influence on the surrounding…

Astrophysics of Galaxies · Physics 2024-10-23 Sebastian Hutschenreuter , Marijke Haverkorn , Philipp Frank , Nergis C. Raycheva , Torsten A. Enßlin

Resolved studies of the correlation between the radio and far-infrared (FIR) emission from galaxies at different frequencies can unveil the interplay between star formation and relativistic interstellar medium (ISM). Thanks to the LOFAR…

[Abridged] We present the analysis of ISOCAM-CVF and NIR photometry data of the HII region complex N4 in LMC. The aim is twofold: 1) to study the connection between the ISM and the star content of this region; 2)to investigate the effects…

Astrophysics · Physics 2009-11-13 A. Contursi , M. Rubio , M. Sauvage , D. Cesarsky , R. Barba , F. Boulanger

Galaxy and occupies perhaps a quarter of the volume of the Galactic disk. Decoding the spectrum of the Galactic diffuse ionizing field is of fundamental interest. This can be done via direct measurements of ionization fractions of various…

Astrophysics of Galaxies · Physics 2023-03-07 S. R. Kulkarni , Charles Beichman , Michael E. Ressler

Polarized thermal emission from Galactic dust is the dominant foreground for CMB polarization measurements at high frequencies, with its statistical properties set by the interplay between turbulence and magnetic fields in the multiphase…

Astrophysics of Galaxies · Physics 2026-01-27 Yue Hu , Bao Truong , Thiem Hoang , Le Ngoc Tram

This review describes where we are today in light of the dust and gas properties and their relation to star formation, in low metallicity galaxies of the local universe following recent surveys from sensitive infrared space telescopes,…

Astrophysics of Galaxies · Physics 2019-11-06 Suzanne C. Madden , Diane Cormier

The design and performance of a wide bandwidth linear polarization modulator based on the Faraday effect is described. Faraday Rotation Modulators (FRMs) are solid-state polarization switches that are capable of modulation up to ~10 kHz.…

Comparison of the ISM properties of a wide range of metal-poor galaxies with normal metal-rich galaxies reveals striking differences. We find that the combination of the low dust abundance and the active star formation results in a very…

Astrophysics of Galaxies · Physics 2017-01-11 Suzanne C. Madden , Diane Cormier , Aurelie Remy-Ruyer

New phenomenon of temporal oscillations of nonlinear Faraday rotation in a driven four-level system is predicted. We show that in this system with one upper level, under the conditions of electromagnetically induced transparency created by…

Quantum Physics · Physics 2007-05-23 Malakyan Yu. P

Radio synchrotron emission, its polarization and its Faraday rotation are powerful tools to study the strength and structure of interstellar magnetic fields. In the Milky Way, Faraday rotation of the polarized emission from pulsars and…

Instrumentation and Methods for Astrophysics · Physics 2010-08-24 R. Beck