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Related papers: All sky angular power spectrum: I. Estimating brig…

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We derive the angular power spectra of intensity and polarization of Galactic synchrotron emission in the range 36 < l < 10^3 from the Parkes survey mapping the southern Galactic plane at 2.4 GHz. The polarization spectra of both electric…

Astrophysics · Physics 2009-10-31 M. Tucci , E. Carretti , S. Cecchini , R. Fabbri , M. Orsini , E. Pierpaoli

We present for the first time a coherent model of the polarized Galactic synchrotron and thermal dust emissions which are the main diffuse foreground for the measurement of the polarized power spectra of the CMB fluctuations with the Planck…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 L. Fauvet , J. F. Macías-Pérez , J. Aumont , F. X. Désert , T. R. Jaffe , A. J. Banday , M. Tristram , A. H. Waelkens , D. Santos

We have analysed the Rhodes/HartRAO survey at 2326 MHz and derived the global angular power spectrum of Galactic continuum emission. In order to measure the angular power spectrum of the diffuse component, point sources were removed from…

Astrophysics · Physics 2009-11-06 G. Giardino , A. J. Banday , P. Fosalba , K. M. Gorski , J. L. Jonas , W. O'Mullane , J. Tauber

We analyze the Southern Sky emission in linear polarization at 2.3 GHz as observed by the S-band Polarization All Sky Survey S-PASS. Our purpose is to study the properties of the diffuse Galactic polarized synchrotron as a contaminant to…

We derive the synchrotron distribution in the Milky Way disk from HII region absorption observations over -40{\deg} < l < 40{\deg} at six frequencies of 76.2, 83.8, 91.5, 99.2, 106.9, and 114.6 MHz with the GaLactic and Extragalactic…

Synchrotron emission pervades the Galactic plane at low radio frequencies, originating from cosmic ray electrons interacting with the Galactic magnetic field. Using a low-frequency radio telescope, the Murchison Widefield Array (MWA), we…

Angular power spectra are calculated and presented for the entirety of the Canadian Galactic Plane Survey polarization dataset at 1.4 GHz covering an area of 1060 deg$^2$. The data analyzed are a combination of data from the 100-m…

Astrophysics of Galaxies · Physics 2015-06-19 R. A. Stutz , E. W. Rosolowsky , R. Kothes , T. Landecker

We study the angular power spectra of polarized Galactic synchrotron in the range 10<l<800, at several frequencies between 0.4 and 2.7 GHz and at several Galactic latitudes up to near the North Galactic Pole. Electric- and magnetic-parity…

Astrophysics · Physics 2009-11-07 M. Bruscoli , M. Tucci , V. Natale , E. Carretti , R. Fabbri , C. Sbarra , S. Cortiglioni

The characteristic outer scale of turbulence and the ratio of the random to ordered components of the magnetic field are key parameters to characterise magnetic turbulence in the interstellar gas, which affects the propagation of cosmic…

We have analysed the angular power spectra of the Parkes radio continuum and polarisation survey of the Southern galactic plane at 2.4 GHz. We have found that in the multipole range l=40-250 the angular power spectrum of the polarised…

Astrophysics · Physics 2009-11-07 G. Giardino , A. J. Banday , K. M. Gorski , K. Bennett , J. L. Jonas , J. Tauber

The interpretation of Galactic synchrotron observations is complicated by the degeneracy between the strength of the magnetic field perpendicular to the line of sight (LOS), $B_\perp$, and the cosmic-ray electron (CRe) spectrum. Depending…

High Energy Astrophysical Phenomena · Physics 2021-07-28 Marco Padovani , Andrea Bracco , Vibor Jelić , Daniele Galli , Elena Bellomi

It is important to correctly subtract point sources from radio-interferometric data in order to measure the power spectrum of diffuse radiation like the Galactic synchrotron or the Epoch of Reionization 21-cm signal. It is computationally…

Cosmology and Nongalactic Astrophysics · Physics 2016-08-29 Samir Choudhuri , Somnath Bharadwaj , Nirupam Roy , Abhik Ghosh , Sk. Saiyad Ali

Cosmic rays (CRs) and magnetic fields are dynamically important components in the Galaxy, and their energy densities are comparable to that of the turbulent interstellar gas. The interaction of CRs and Galactic magnetic fields produces…

Astrophysics of Galaxies · Physics 2019-01-23 I. M. Polderman , M. Haverkorn , T. R. Jaffe , M. I. R. Alves

We study the angular clustering of point sources in The GMRT (Giant Meter Wave Telescope) Sky Survey (TGSS). The survey at 150 MHz with delta > -53.5 degrees has a sky coverage of 3.6 pi steradians, i.e., 90% of the whole sky. We created…

Astrophysics of Galaxies · Physics 2019-06-04 Sandeep Rana , J. S. Bagla

We present the first results from a series of observations conducted with the Westerbork telescope in the 140--160 MHz range with a 2 arcmin resolution aimed at characterizing the properties of the foregrounds for epoch of reionization…

Synchrotron diffuse radiation (SDR) emission is one of the major Galactic components, in the 100 MHz up to 100 GHz frequency range. Its spectrum and sky map provide valuable measure of the galactic cosmic ray electrons (GCRE) in the…

High Energy Astrophysical Phenomena · Physics 2018-11-08 Giuseppe Di Bernardo , Dario Grasso , Carmelo Evoli , Daniele Gaggero

The C-Band All-Sky Survey (C-BASS) is an all-sky full-polarisation survey at a frequency of 5 GHz, designed to provide complementary data to the all-sky surveys of WMAP and Planck, and future CMB B-mode polarization imaging surveys. The…

The Galactic diffuse soft gamma-ray (30-800 keV) emission has been measured from the Galactic Center by the HIREGS balloon-borne germanium spectrometer to determine the spectral characteristics and origin of the emission. The resulting…

Astrophysics · Physics 2009-10-31 S. E. Boggs , R. P. Lin , S. Slassi-Sennou , W. Coburn , R. M. Pelling

We present 3D models of the Galactic magnetic field including regular and turbulent components, and of the distribution of matter in the Galaxy including relativistic electrons and dust grains. By integrating along the line of sight, we…

Astrophysics of Galaxies · Physics 2013-03-26 L. Fauvet , J. F. Macías-Pérez , F. X. Désert

Diffuse Galactic light has been observed in the optical since the 1930s. We propose that, when observed in the optical with deep imaging surveys, it can be used as a tracer of the turbulent cascade in the diffuse interstellar medium (ISM),…

Astrophysics of Galaxies · Physics 2016-08-31 M. -A. Miville-Deschenes , P. -A. Duc , F. Marleau , J. -C. Cuillandre , P. Didelon , S. Gwyn , E. Karabal