First evidence of diffuse ultra-steep-spectrum radio emission surrounding the cool core of a cluster [PDF]
, 2018 Diffuse synchrotron radio emission from cosmic-ray electrons is observed at the center of a number of galaxy clusters. These sources can be classified either as giant radio halos, which occur in merging clusters, or as mini halos, which are found only in
A Bonafede +60 more
core +6 more sources
Identification of Spinning Dust in Halpha-Correlated Microwave Emission [PDF]
Astrophys.J.680:1235-1242,2008, 2007 CMB experiments commonly use maps of Halpha intensity as a spatial template for Galactic free-free emission, assuming a power law I_nu \propto nu^-0.15 for the spectrum. Any departure from the assumed free-free spectrum could have a detrimental effect on determination of the primary CMB anisotropy.
arxiv +1 more source
On the Spectrum and Polarization of Magnetar Flare Emission [PDF]
Galaxies, 2017 Bursts and flares are among the distinctive observational manifestations of magnetars, isolated neutron stars endowed with an ultra-strong magnetic field ( B ≈ 10 14 – 10 15 G). It is believed that these events arise in a hot electron-positron plasma, injected in the magnetosphere, due to a magnetic field instability, which remains ...
Roberto Taverna +2 more
openaire +8 more sources
MAGNETIC NANOPARTICLES IN THE INTERSTELLAR MEDIUM: EMISSION SPECTRUM AND POLARIZATION [PDF]
, 2012 The presence of ferromagnetic or ferrimagnetic nanoparticles in the interstellar medium would give rise to magnetic dipole radiation at microwave and submillimeter frequencies.
B. Draine, B. Hensley
semanticscholar +1 more source
Power Spectrum Analysis of the OMC1 Image at 1.1 mm Wavelength [PDF]
, 2012 We present a 1.1mm emission map of the OMC1 region observed with AzTEC, a new large-format array composed of 144 silicon-nitride micromesh bolometers, that was in use at the James Clerk Maxwell Telescope (JCMT).
Kim, Sungeun, Youn, Soyoung
core +1 more source
Quasiclassical approach to synergic synchrotron–Cherenkov radiation in polarized vacuum
New Journal of Physics, 2020 Photon emission by an ultrarelativistic charged particle in extremely strong magnetic field is analyzed, with vacuum polarization and photon recoil taken into account. Vacuum polarization is treated phenomenologically via refractive index.
I I Artemenko +2 more
doaj +1 more source
Revision of the γ-Ray Emission from SNR CTB 109 with the Fermi Large Area Telescope
The Astrophysical Journal, 2023 CTB 109 is a middle-aged shell-type supernova remnant (SNR) with bright thermal X-ray emission. We reanalyze the GeV γ -ray emission from CTB 109 using 13 yr of Pass 8 data recorded by the Fermi Large Area Telescope.
Yuliang Xin, Qizhen Zhao, Xiaolei Guo
doaj +1 more source
The Near-Infrared Broad Emission Line Region of Active Galactic Nuclei -- I. The Observations
, 2007 We present high quality (high signal-to-noise ratio and moderate spectral resolution) near-infrared (near-IR) spectroscopic observations of 23 well-known broad-emission line active galactic nuclei (AGN). Additionally, we obtained simultaneous (within two
Bradley M. Peterson +11 more
core +1 more source
Emission spectrum of V3+-αAl2O3 [PDF]
Journal de Physique Lettres, 1977 Two emission lines of V3+-αAl2O 3 have been obtained in the near infrared region (9 740 cm-1) at 2 K, 10 K and 77 K. Lifetimes of these lines and their behaviour under stress have been analyzed and an interpretation is suggested.
Bernard Champagnon, Eugène Duval
openaire +3 more sources
Relativistic Broadening of Iron Emission Lines in a Sample of AGN
, 2009 We present a uniform X-ray spectral analysis of eight type-1 active galactic nuclei (AGN) that have been previously observed with relativistically broadened iron emission lines.
Behar +40 more
core +1 more source