Academic Journal
Wide-band, low-frequency pulse profiles of 100 radio pulsars with LOFAR
| العنوان: | Wide-band, low-frequency pulse profiles of 100 radio pulsars with LOFAR |
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| المؤلفون: | Pilia, M., Hessels, J.W.T., J, Stappers, B.W, W, Kondratiev, V.I., Kramer, M, M, van Leeuwen, J, J, Weltevrede, P, P, Lyne, A, G, Zagkouris, K, Hassall, T.E., E, Bilous, A.V., A, Breton, R.P., P, Falcke, H, Griessmeier, Jean-Mathias, Keane, E, E, Karastergiou, A, A, Kuniyoshi, M, M, Noutsos, A, A, Osłowski, S., Serylak, M., M, Sobey, C., C, ter Veen, S, V, Alexov, A, A, Anderson, A, J, Asgekar, A, A, Avruch, A, A, Bell, M, E, Bentum, M, J, Bernardi, G, G, Bîrzan, L., Bonafede, A, A, Breitling, B, Broderick, J, J, Brüggen, M, M, Ciardi, C, C, Corbel, Stéphane, C, de Geus, D, D, de Jong, A, J, Deller, A, D, Duscha, S, D, Eislöffel, J, J, Fallows, R, A, Fender, R, Ferrari, C, C, Frieswijk, W, W, Garrett, M.A, G, Gunst, A, G, Hamaker, J.P., J, Heald, H, G, Horneffer, A, A, Jonker, P, J, Juette, J, J, Kuper, G, G, Maat, P, P, Mann, M, G, Markoff, S, M, Mcfadden, R, M, Mckay-Bukowski, D., D, Miller-Jones, C, J, Nelles, A, A, Paas, H., P, Pandey-Pommier, M, P, Pietka, M., P, Pizzo, P, P, Polatidis, P, G, Reich, R, W, Röttgering, R, Rowlinson, A., A, Schwarz, S, D, Smirnov, O, Steinmetz, S, M, Stewart, S, A, Swinbank, S, J, Tagger, Michel, Tang, Y, Tasse, C, C, Thoudam, S, Toribio, C, C, van Der Horst, A, J, Vermeulen, R, V, Vocks, C, C, van Weeren, R, J, Wijers, R.A.M.J, Wijnands, R, W, Wijnholds, S, J, Wucknitz, O, W, Zarka, P, P |
| المساهمون: | Netherlands Institute for Radio Astronomy (ASTRON), Jodrell Bank Centre for Astrophysics, University of Manchester Manchester, Vrije Universiteit Medical Centre (VUMC), Vrije Universiteit Amsterdam Amsterdam (VU), Astronomical Institute Anton Pannekoek (AI PANNEKOEK), University of Amsterdam Amsterdam = Universiteit van Amsterdam (UvA), Oxford Astrophysics, University of Oxford, School of Physics and Astronomy Southampton, University of Southampton, Institute for Mathematics, Astrophysics and Particle Physics (IMAPP), Radboud University Nijmegen, Laboratoire de Physique et Chimie de l'Environnement et de l'Espace (LPC2E), Observatoire des Sciences de l'Univers en région Centre (OSUC), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES), Unité Scientifique de la Station de Nançay (USN), Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Université d'Orléans (UO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre for Astrophysics and Supercomputing Melbourne (CAS), Swinburne University of Technology Melbourne, Department of Physics Oxford, Max-Planck-Institut für Radioastronomie (MPIFR), Universität Bielefeld = Bielefeld University, University of Cape Town, Space Telescope Science Institute (STSci), Epidémiologie et Biostatistique Bordeaux, Université Bordeaux Segalen - Bordeaux 2-Institut National de la Santé et de la Recherche Médicale (INSERM), SRON Netherlands Institute for Space Research (SRON), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University-Smithsonian Institution, Leiden Observatory Leiden, Universiteit Leiden = Leiden University, Universität Hamburg = University of Hamburg (UHH), Leibniz-Institut DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH / Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures (DSMZ), University of Edinburgh (Edin.), Max-Planck-Institut für Astrophysik (MPA), Max-Planck-Gesellschaft, Astrophysique Interprétation Modélisation (AIM (UMR7158 / UMR_E_9005 / UM_112)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Structural Dynamics and Acoustics, University of Twente, Thüringer Landessternwarte Tautenburg (TLS), Institute of Mathematical and Physical Sciences, Department of Astrophysics Oxford, Département de Géologie, Université de Montréal (UdeM), Astronomisches Institut der Ruhr-Universität Bochum, Ruhr University Bochum = Ruhr-Universität Bochum (RUB), Leibniz-Institut für Astrophysik Potsdam (AIP), Department of Physical Sciences, University of Oulu, University of Oulu Finland = Oulun yliopisto Suomi = Université d'Oulu Finlande, Curtin University, University of Groningen Groningen, Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Australia Telescope National Facility (ATNF), Commonwealth Scientific and Industrial Research Organisation Australia (CSIRO), Institute of Farm Animal Genetics (ING), Friedrich-Loeffler-Institut (FLI), SKA South Africa, Ska South Africa, Astrophysikalisches Institut Potsdam (AIP), Department of Physics Dunedin, University of Otago Dunedin, Nouvelle-Zélande, Princeton University, Edinburgh Research Station, Centre for Ecology and Hydrology, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Sciences et Lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Department of Astrophysics Nijmegen, Radboud University Nijmegen -Radboud University Nijmegen, Argelander-Institut für Astronomie (AlfA), Rheinische Friedrich-Wilhelms-Universität Bonn, Alexander von Humboldt Foundation Agence Nationale de la Recherche ANR-09-JCJC-0001-01, ANR-09-JCJC-0001,OPALES(2009), European Project: 337062,EC:FP7:ERC,ERC-2013-StG,DRAGNET(2014), European Project: 617199,EC:FP7:ERC,ERC-2013-CoG,ALERT(2014), European Project: 224838,EC:FP7:PEOPLE,FP7-PEOPLE-2007-4-3-IRG,PULSARS WITH LOFAR(2008) |
| المصدر: | ISSN: 0004-6361. |
| بيانات النشر: | CCSD EDP Sciences |
| سنة النشر: | 2016 |
| المجموعة: | HAL Lyon 1 (University Claude Bernard Lyon 1) |
| مصطلحات موضوعية: | stars: neutron, pulsars: general, [SDU]Sciences of the Universe [physics] |
| الوصف: | International audience ; Context. LOFAR offers the unique capability of observing pulsars across the 10−240 MHz frequency range with a fractional bandwidth of roughly 50%. This spectral range is well suited for studying the frequency evolution of pulse profile morphology caused by both intrinsic and extrinsic effects such as changing emission altitude in the pulsar magnetosphere or scatter broadening by the interstellar medium, respectively. Aims. The magnitude of most of these effects increases rapidly towards low frequencies. LOFAR can thus address a number of open questions about the nature of radio pulsar emission and its propagation through the interstellar medium. Methods. We present the average pulse profiles of 100 pulsars observed in the two LOFAR frequency bands: high band (120–167 MHz, 100 profiles) and low band (15–62 MHz, 26 profiles). We compare them with Westerbork Synthesis Radio Telescope (WSRT) and Lovell Telescope observations at higher frequencies (350 and 1400 MHz) to study the profile evolution. The profiles were aligned in absolute phase by folding with a new set of timing solutions from the Lovell Telescope, which we present along with precise dispersion measures obtained with LOFAR. Results. We find that the profile evolution with decreasing radio frequency does not follow a specific trend; depending on the geometry of the pulsar, new components can enter into or be hidden from view. Nonetheless, in general our observations confirm the widening of pulsar profiles at low frequencies, as expected from radius-to-frequency mapping or birefringence theories. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/1509.06396; info:eu-repo/grantAgreement/EC/FP7/337062/EU/DRAGNET: A high-speed, wide-angle camera for catching extreme astrophysical events/DRAGNET; info:eu-repo/grantAgreement/EC/FP7/617199/EU/ALERT - The Apertif-LOFAR Exploration of the Radio Transient Sky/ALERT; info:eu-repo/grantAgreement/EC/FP7/224838/EU/Radio pulsars with LOFAR: a study of extreme physics laboratories./PULSARS WITH LOFAR; ARXIV: 1509.06396; BIBCODE: 2016A&A.586A.92P |
| DOI: | 10.1051/0004-6361/201425196 |
| الاتاحة: | https://insu.hal.science/insu-01467174 https://insu.hal.science/insu-01467174v1/document https://insu.hal.science/insu-01467174v1/file/aa25196-14.pdf https://doi.org/10.1051/0004-6361/201425196 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.41679C6B |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/0004-6361/201425196 |
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