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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Wide-band simultaneous observations of pulsars: Disentangling dispersion measure and profile variations
Astronomy and Astrophysics, Volume 543, Article A66, Year 2012
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Description
Dispersion in the interstellar medium is a well known phenomenon that follows a simple relationship, which has been used to predict the time delay of dispersed radio pulses since the late 1960s. We performed wide-band simultaneous observations of four pulsars with LOFAR (at 40-190 MHz), the 76-m Lovell Telescope (at 1400 MHz) and the Effelsberg 100-m Telescope (at 8000 MHz) to test the accuracy of the dispersion law over a broad frequency range. In this paper we present the results of these observations which show that the dispersion law is accurate to better than 1 part in 105 across our observing band. We use this fact to constrain some of the properties of the interstellar medium along the line-of-sight and use the lack of any aberration or retardation effects to determine upper limits on emission heights in the pulsar magnetosphere. We also discuss the effect of pulse profile evolution on our observations, and the implications that it could have for precision pulsar timing projects such as the detection of gravitational waves with pulsar timing arrays. © 2012 ESO.
Authors & Co-Authors
Hassall, Tom E.
United Kingdom, Manchester
The University of Manchester
Stappers, Benjamin W.
United Kingdom, Manchester
The University of Manchester
Hessels, Jason W.T.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Kramer, Michael
United Kingdom, Manchester
The University of Manchester
Germany, Bonn
Max Planck Institute for Radio Astronomy
Alexov, Anastasia
Netherlands, Amsterdam
Universiteit Van Amsterdam
Anderson, Kenneth R.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Coenen, Thijs
Netherlands, Amsterdam
Universiteit Van Amsterdam
Karastergiou, Aris
United Kingdom, Oxford
University of Oxford
Keane, Evan F.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Kondratiev, Vladislav I.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
van Leeuwen, Joeri
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Noutsos, Aristeidis
Germany, Bonn
Max Planck Institute for Radio Astronomy
Serylak, MacIej
France, Nancay
Station de Radioastronomie de Nancay
France, Orleans
Laboratoire de Physique et de Chimie de L'environnement et de L'espace Lpc2e
Sobey, Charlotte A.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Verbiest, Joris P.W.
Germany, Bonn
Max Planck Institute for Radio Astronomy
Weltevrede, Patrick
United Kingdom, Manchester
The University of Manchester
Zagkouris, Kimon
United Kingdom, Oxford
University of Oxford
Fender, Robert P.
United Kingdom, Southampton
University of Southampton
Wijers, Ralph A.M.J.
Netherlands, Amsterdam
Universiteit Van Amsterdam
B̈ahren, Lars
Netherlands, Amsterdam
Universiteit Van Amsterdam
Bell, Martin E.
United Kingdom, Southampton
University of Southampton
Australia, Sydney
The University of Sydney
Broderick, Jess W.
United Kingdom, Southampton
University of Southampton
Corbel, Stéphane
France, Gif-sur-yvette
Astrophysique, Instrumentation et Modélisation de Paris-saclay
France, Paris
Institut Universitaire de France
Dhillon, Vikhram S.
United Kingdom, Sheffield
The University of Sheffield
Eislöffel, Jochen
Unknown Affiliation
Falcke, Heino D.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Germany, Bonn
Max Planck Institute for Radio Astronomy
Netherlands, Nijmegen
Radboud Universiteit
Grießmeier, Jean Mathias
France, Orleans
Laboratoire de Physique et de Chimie de L'environnement et de L'espace Lpc2e
Jonker, Peter G.
Netherlands, Nijmegen
Radboud Universiteit
Netherlands, Utrecht
Sron Netherlands Institute for Space Research
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Law, Casey J.
Netherlands, Amsterdam
Universiteit Van Amsterdam
United States, Berkeley
University of California, Berkeley
Markoff, Sera B.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Miller-Jones, James C.A.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Australia, Perth
Curtin University
Osten, Rachel A.
United States, Baltimore
Space Telescope Science Institute
Rol, Evert
Netherlands, Amsterdam
Universiteit Van Amsterdam
Scaife, Anna M.M.
United Kingdom, Southampton
University of Southampton
Scheers, Bart
Netherlands, Amsterdam
Universiteit Van Amsterdam
Schellart, Pim
Netherlands, Nijmegen
Radboud Universiteit
Spreeuw, Hanno N.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Swinbank, John D.
Netherlands, Amsterdam
Universiteit Van Amsterdam
Ter-Veen, Sander
Netherlands, Nijmegen
Radboud Universiteit
Wise, Michael W.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Wijnands, Rudy
Netherlands, Amsterdam
Universiteit Van Amsterdam
Wucknitz, Olaf
Germany, Bonn
Universität Bonn
Zarka, Philippe M.
France, Paris
Sorbonne Université
Asgekar, Ashish
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Bell, Michael R.
Germany, Garching Bei Munchen
Max Planck Institute for Astrophysics
Bentum, Mark J.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Bernardi, Gianni
United States, Cambridge
Harvard-smithsonian Center for Astrophysics
Best, Phillip N.
United Kingdom, Edinburgh
The University of Edinburgh
Bonafede, Annalisa
Germany, Bremen
Constructor University
Boonstra, Albert Jan
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Brentjens, Michiel A.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Brouw, Willem N.
Netherlands, Groningen
Kapteyn Instituut
Brüggen, Marcus
Germany, Bremen
Constructor University
Butcher, Harvey R.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Australia, Canberra
The Australian National University
Ciardi, Benedetta
Germany, Garching Bei Munchen
Max Planck Institute for Astrophysics
Garrett, Michael A.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Leiden
Universiteit Leiden
Gerbers, Marchel
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Gunst, André W.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
van Haarlem, Michiel P.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Heald, George H.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Hoeft, Matthias
Unknown Affiliation
Holties, Hanno A.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
de Jong, Arie
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Koopmans, Léon V.E.
Netherlands, Groningen
Kapteyn Instituut
Kuniyoshi, Masaya
Germany, Bonn
Max Planck Institute for Radio Astronomy
Kuper, G.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Loose, G. Marcel
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Maat, Peter D.H.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Masters, Joseph S.
United States, Charlottesville
National Radio Astronomy Observatory
McKean, John P.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Meulman, Henri
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Mevius, M.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Munk, H.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Noordam, Jan E.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Orrú, Emanuela
Netherlands, Nijmegen
Radboud Universiteit
Paas, Harm
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Pandey-Pommier, Mamta
France, Saint-genis-laval
Observatoire de Lyon
Pandey, Vishhambhar N.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Pizzo, Roberto F.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Polatidis, Antonios G.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Reich, Wolfganga
Germany, Bonn
Max Planck Institute for Radio Astronomy
R̈ottgering, Huub J.A.R.
Netherlands, Leiden
Universiteit Leiden
Sluman, J. J.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Steinmetz, Matthias
Germany, Potsdam
Leibniz Institute for Astrophysics Potsdam
Tagger, Michel
France, Orleans
Laboratoire de Physique et de Chimie de L'environnement et de L'espace Lpc2e
Tang, Y.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Tasse, Cyril
France, Paris
Sorbonne Université
Vermeulen, René C.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
van Weeren, Reinout J.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Netherlands, Leiden
Universiteit Leiden
Wijnholds, Stefan J.
Netherlands, Dwingeloo
Netherlands Foundation for Research in Astronomy
Yatawatta, Sarod B.
Netherlands, Groningen
Kapteyn Instituut
Statistics
Citations: 86
Authors: 91
Affiliations: 30
Identifiers
Doi:
10.1051/0004-6361/201218970
ISSN:
14320746
Research Areas
Environmental