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Dual-frequency single-pulse study of PSR B0950+08

Bilous, A. V. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Grießmeier, J.M. (author)
Universite d'Orleans,University of Orléans,Station de Radioastronomie de Nançay
Pennucci, T. (author)
National Radio Astronomy Observatory,Eötvös Loránd University (ELTE)
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Wu, Z. (author)
Universität Bielefeld,Bielefeld University
Bondonneau, L. (author)
Universite d'Orleans,University of Orléans,Centre national de la recherche scientifique (CNRS)
Kondratiev, V. (author)
Netherlands Institute for Radio Astronomy (ASTRON),Russian Academy of Sciences
van Leeuwen, J. (author)
Anton Pannekoek Institute for Astronomy
Maan, Y. (author)
Netherlands Institute for Radio Astronomy (ASTRON),National Centre for Radio Astrophysics India
Connor, L. (author)
California Institute of Technology (Caltech),Anton Pannekoek Institute for Astronomy
Oostrum, L. C. (author)
Netherlands eScience Center,Netherlands Institute for Radio Astronomy (ASTRON)
Petroff, E. (author)
McGill University,Anton Pannekoek Institute for Astronomy
Verbiest, J. P.W. (author)
Universität Bielefeld,Bielefeld University,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
Vohl, D. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Mckee, J. W. (author)
Institut canadien d'astrophysique théorique,Canadian Institute for Theoretical Astrophysics
Shaifullah, G. (author)
Universita' degli Studi di Milano-Bicocca,University of Milano-Bicocca
Theureau, G. (author)
Universite d'Orleans,University of Orléans,LUTH - Laboratoire de l'Univers et de ses Theories,Station de Radioastronomie de Nançay
Ulyanov, O. M. (author)
National Academy of Sciences in Ukraine
Cecconi, B. (author)
Centre national de la recherche scientifique (CNRS)
Coolen, A. H.W.M. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Corbel, S. (author)
Station de Radioastronomie de Nançay,Le Commissariat à l’Énergie Atomique et aux Énergies Alternatives (CEA),The French Alternative Energies and Atomic Energy Commission (CEA)
Damstra, Sieds (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Dénes, H. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Girard, J. N. (author)
Centre national de la recherche scientifique (CNRS)
Hut, B. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Ivashina, Marianna, 1975 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Konovalenko, O. O. (author)
National Academy of Sciences in Ukraine
Kutkin, A. M. (author)
Russian Academy of Sciences,Netherlands Institute for Radio Astronomy (ASTRON)
Loose, G. M. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Mulder, H. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Ruiter, Mark (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Smits, R. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Tokarsky, P. L. (author)
National Academy of Sciences in Ukraine
Vermaas, N. (author)
Netherlands Institute for Radio Astronomy (ASTRON)
Zakharenko, V. V. (author)
National Academy of Sciences in Ukraine
Zarka, P.M. (author)
Centre national de la recherche scientifique (CNRS)
Ziemke, J. (author)
Netherlands Institute for Radio Astronomy (ASTRON),Universitetet i Oslo,University of Oslo
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 (creator_code:org_t)
2022-02-11
2022
English.
In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 658
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • PSR B0950+08 is a bright nonrecycled pulsar whose single-pulse fluence variability is reportedly large. Based on observations at two widely separated frequencies, 55 MHz (NenuFAR) and 1.4 GHz (Westerbork Synthesis Radio Telescope), we review the properties of these single pulses. We conclude that they are more similar to ordinary pulses of radio emission than to a special kind of short and bright giant pulses, observed from only a handful of pulsars. We argue that a temporal variation of the properties of the interstellar medium along the line of sight to this nearby pulsar, namely the fluctuating size of the decorrelation bandwidth of diffractive scintillation makes an important contribution to the observed single-pulse fluence variability. We further present interesting structures in the low-frequency single-pulse spectra that resemble the "sad trombones"seen in fast radio bursts (FRBs); although for PSR B0950+08 the upward frequency drift is also routinely present. We explain these spectral features with radius-to-frequency mapping, similar to the model developed by Wang et al. (2019, ApJ, 876, L15) for FRBs. Finally, we speculate that μs-scale fluence variability of the general pulsar population remains poorly known, and that its further study may bring important clues about the nature of FRBs.

Subject headings

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
NATURVETENSKAP  -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)

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