Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations
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 Lov...
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| Veröffentlicht in: | Astronomy and astrophysics (Berlin) 2012-07, Vol.543, p.A66 |
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| creator | Hassall, T. E. Stappers, B. W. Hessels, J. W. T. Kramer, M. Alexov, A. Anderson, K. Coenen, T. Karastergiou, A. Keane, E. F. Kondratiev, V. I. Lazaridis, K. van Leeuwen, J. Noutsos, A. Serylak, M. Sobey, C. Verbiest, J. P. W. Weltevrede, P. Zagkouris, K. Fender, R. Wijers, R. A. M. J. Bähren, L. Bell, M. E. Broderick, J. W. Corbel, S. Daw, E. J. Dhillon, V. S. Eislöffel, J. Falcke, H. Grießmeier, J.-M. Jonker, P. Law, C. Markoff, S. Miller-Jones, J. C. A. Osten, R. Rol, E. Scaife, A. M. M. Scheers, B. Schellart, P. Spreeuw, H. Swinbank, J. ter Veen, S. Wise, M. W. Wijnands, R. Wucknitz, O. Zarka, P. Asgekar, A. Bell, M. R. Bentum, M. J. Bernardi, G. Best, P. Bonafede, A. Boonstra, A. J. Brentjens, M. Brouw, W. N. Brüggen, M. Butcher, H. R. Ciardi, B. Garrett, M. A. Gerbers, M. Gunst, A. W. van Haarlem, M. P. Heald, G. Hoeft, M. Holties, H. de Jong, A. Koopmans, L. V. E. Kuniyoshi, M. Kuper, G. Loose, G. M. Maat, P. Masters, J. McKean, J. P. Meulman, H. Mevius, M. Munk, H. Noordam, J. E. Orrú, E. Paas, H. Pandey-Pommier, M. Pandey, V. N. Pizzo, R. Polatidis, A. Reich, W. Röttgering, H. Sluman, J. Steinmetz, M. Sterks, C. G. M. Tagger, M. Tang, Y. Tasse, C. Vermeulen, R. van Weeren, R. J. Wijnholds, S. J. Yatawatta, S. |
| 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. |
| doi_str_mv | 10.1051/0004-6361/201218970 |
| format | Article |
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M. ; Scheers, B. ; Schellart, P. ; Spreeuw, H. ; Swinbank, J. ; ter Veen, S. ; Wise, M. W. ; Wijnands, R. ; Wucknitz, O. ; Zarka, P. ; Asgekar, A. ; Bell, M. R. ; Bentum, M. J. ; Bernardi, G. ; Best, P. ; Bonafede, A. ; Boonstra, A. J. ; Brentjens, M. ; Brouw, W. N. ; Brüggen, M. ; Butcher, H. R. ; Ciardi, B. ; Garrett, M. A. ; Gerbers, M. ; Gunst, A. W. ; van Haarlem, M. P. ; Heald, G. ; Hoeft, M. ; Holties, H. ; de Jong, A. ; Koopmans, L. V. E. ; Kuniyoshi, M. ; Kuper, G. ; Loose, G. M. ; Maat, P. ; Masters, J. ; McKean, J. P. ; Meulman, H. ; Mevius, M. ; Munk, H. ; Noordam, J. E. ; Orrú, E. ; Paas, H. ; Pandey-Pommier, M. ; Pandey, V. N. ; Pizzo, R. ; Polatidis, A. ; Reich, W. ; Röttgering, H. ; Sluman, J. ; Steinmetz, M. ; Sterks, C. G. M. ; Tagger, M. ; Tang, Y. ; Tasse, C. ; Vermeulen, R. ; van Weeren, R. J. ; Wijnholds, S. 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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.</description><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>ISM: general</subject><subject>magnetic fields</subject><subject>Physics</subject><subject>pulsars: general</subject><subject>Sciences of the Universe</subject><subject>telescopes</subject><issn>0004-6361</issn><issn>1432-0746</issn><issn>1432-0756</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNo9kEtr3DAUhUVJIJPHL8jGm24Kbq4eluTsQmiawtCmJSFLIVvSVI3HNrrjIf33lXHx6nK43zmLj5BrCp8pVPQGAEQpuaQ3DCijulbwgWyo4KwEJeQJ2azEGTlH_JNjxviG7F6j82Vje1dg3E_dwfZ-mLAYGvTpaA9x6HMIxTh1aBPeFi6i7zO162K_m9PoE2aq2HuLU_LFPDWmIcTOF0eb4rJxSU6D7dBf_b8X5OXhy_P9Y7n98fXb_d22bIXkh9I5pRoqtXWtpK6mLLQatBDgGleBqAKADrWvNWNMW-WUhoZqx13wtJIh8Avyadn9bTszpri36a8ZbDSPd1sTe5xMFlTxmrEjzTBf4DYNiMmHtUHBzGLNrM3M2swqNrc-Lq3RYmu7kGzfRlyrTAqupBCZKxcu4sG_r3-b3oxUXFVGw6v5CfCLPz0p853_A5kYiLo</recordid><startdate>20120701</startdate><enddate>20120701</enddate><creator>Hassall, T. 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A.</creator><creator>Gerbers, M.</creator><creator>Gunst, A. W.</creator><creator>van Haarlem, M. P.</creator><creator>Heald, G.</creator><creator>Hoeft, M.</creator><creator>Holties, H.</creator><creator>de Jong, A.</creator><creator>Koopmans, L. V. E.</creator><creator>Kuniyoshi, M.</creator><creator>Kuper, G.</creator><creator>Loose, G. M.</creator><creator>Maat, P.</creator><creator>Masters, J.</creator><creator>McKean, J. P.</creator><creator>Meulman, H.</creator><creator>Mevius, M.</creator><creator>Munk, H.</creator><creator>Noordam, J. E.</creator><creator>Orrú, E.</creator><creator>Paas, H.</creator><creator>Pandey-Pommier, M.</creator><creator>Pandey, V. N.</creator><creator>Pizzo, R.</creator><creator>Polatidis, A.</creator><creator>Reich, W.</creator><creator>Röttgering, H.</creator><creator>Sluman, J.</creator><creator>Steinmetz, M.</creator><creator>Sterks, C. G. M.</creator><creator>Tagger, M.</creator><creator>Tang, Y.</creator><creator>Tasse, C.</creator><creator>Vermeulen, R.</creator><creator>van Weeren, R. J.</creator><creator>Wijnholds, S. J.</creator><creator>Yatawatta, S.</creator><general>EDP Sciences</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0003-2816-9492</orcidid><orcidid>https://orcid.org/0000-0002-5068-4581</orcidid><orcidid>https://orcid.org/0000-0003-3362-7996</orcidid><orcidid>https://orcid.org/0000-0003-1672-9878</orcidid><orcidid>https://orcid.org/0000-0003-2962-3220</orcidid></search><sort><creationdate>20120701</creationdate><title>Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations</title><author>Hassall, T. E. ; Stappers, B. W. ; Hessels, J. W. T. ; Kramer, M. ; Alexov, A. ; Anderson, K. ; Coenen, T. ; Karastergiou, A. ; Keane, E. F. ; Kondratiev, V. I. ; Lazaridis, K. ; van Leeuwen, J. ; Noutsos, A. ; Serylak, M. ; Sobey, C. ; Verbiest, J. P. W. ; Weltevrede, P. ; Zagkouris, K. ; Fender, R. ; Wijers, R. A. M. J. ; Bähren, L. ; Bell, M. E. ; Broderick, J. W. ; Corbel, S. ; Daw, E. J. ; Dhillon, V. S. ; Eislöffel, J. ; Falcke, H. ; Grießmeier, J.-M. ; Jonker, P. ; Law, C. ; Markoff, S. ; Miller-Jones, J. C. A. ; Osten, R. ; Rol, E. ; Scaife, A. M. M. ; Scheers, B. ; Schellart, P. ; Spreeuw, H. ; Swinbank, J. ; ter Veen, S. ; Wise, M. W. ; Wijnands, R. ; Wucknitz, O. ; Zarka, P. ; Asgekar, A. ; Bell, M. R. ; Bentum, M. J. ; Bernardi, G. ; Best, P. ; Bonafede, A. ; Boonstra, A. J. ; Brentjens, M. ; Brouw, W. N. ; Brüggen, M. ; Butcher, H. R. ; Ciardi, B. ; Garrett, M. A. ; Gerbers, M. ; Gunst, A. W. ; van Haarlem, M. P. ; Heald, G. ; Hoeft, M. ; Holties, H. ; de Jong, A. ; Koopmans, L. V. E. ; Kuniyoshi, M. ; Kuper, G. ; Loose, G. M. ; Maat, P. ; Masters, J. ; McKean, J. P. ; Meulman, H. ; Mevius, M. ; Munk, H. ; Noordam, J. E. ; Orrú, E. ; Paas, H. ; Pandey-Pommier, M. ; Pandey, V. N. ; Pizzo, R. ; Polatidis, A. ; Reich, W. ; Röttgering, H. ; Sluman, J. ; Steinmetz, M. ; Sterks, C. G. M. ; Tagger, M. ; Tang, Y. ; Tasse, C. ; Vermeulen, R. ; van Weeren, R. J. ; Wijnholds, S. J. ; Yatawatta, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c463t-dd77b168adc61d912fc808440dbd5045f008f9e982228a7d780b18d3dfe156ff3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Astronomy</topic><topic>Astrophysics</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>ISM: general</topic><topic>magnetic fields</topic><topic>Physics</topic><topic>pulsars: general</topic><topic>Sciences of the Universe</topic><topic>telescopes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hassall, T. E.</creatorcontrib><creatorcontrib>Stappers, B. W.</creatorcontrib><creatorcontrib>Hessels, J. W. T.</creatorcontrib><creatorcontrib>Kramer, M.</creatorcontrib><creatorcontrib>Alexov, A.</creatorcontrib><creatorcontrib>Anderson, K.</creatorcontrib><creatorcontrib>Coenen, T.</creatorcontrib><creatorcontrib>Karastergiou, A.</creatorcontrib><creatorcontrib>Keane, E. F.</creatorcontrib><creatorcontrib>Kondratiev, V. I.</creatorcontrib><creatorcontrib>Lazaridis, K.</creatorcontrib><creatorcontrib>van Leeuwen, J.</creatorcontrib><creatorcontrib>Noutsos, A.</creatorcontrib><creatorcontrib>Serylak, M.</creatorcontrib><creatorcontrib>Sobey, C.</creatorcontrib><creatorcontrib>Verbiest, J. P. W.</creatorcontrib><creatorcontrib>Weltevrede, P.</creatorcontrib><creatorcontrib>Zagkouris, K.</creatorcontrib><creatorcontrib>Fender, R.</creatorcontrib><creatorcontrib>Wijers, R. A. M. J.</creatorcontrib><creatorcontrib>Bähren, L.</creatorcontrib><creatorcontrib>Bell, M. E.</creatorcontrib><creatorcontrib>Broderick, J. W.</creatorcontrib><creatorcontrib>Corbel, S.</creatorcontrib><creatorcontrib>Daw, E. J.</creatorcontrib><creatorcontrib>Dhillon, V. S.</creatorcontrib><creatorcontrib>Eislöffel, J.</creatorcontrib><creatorcontrib>Falcke, H.</creatorcontrib><creatorcontrib>Grießmeier, J.-M.</creatorcontrib><creatorcontrib>Jonker, P.</creatorcontrib><creatorcontrib>Law, C.</creatorcontrib><creatorcontrib>Markoff, S.</creatorcontrib><creatorcontrib>Miller-Jones, J. C. A.</creatorcontrib><creatorcontrib>Osten, R.</creatorcontrib><creatorcontrib>Rol, E.</creatorcontrib><creatorcontrib>Scaife, A. M. M.</creatorcontrib><creatorcontrib>Scheers, B.</creatorcontrib><creatorcontrib>Schellart, P.</creatorcontrib><creatorcontrib>Spreeuw, H.</creatorcontrib><creatorcontrib>Swinbank, J.</creatorcontrib><creatorcontrib>ter Veen, S.</creatorcontrib><creatorcontrib>Wise, M. W.</creatorcontrib><creatorcontrib>Wijnands, R.</creatorcontrib><creatorcontrib>Wucknitz, O.</creatorcontrib><creatorcontrib>Zarka, P.</creatorcontrib><creatorcontrib>Asgekar, A.</creatorcontrib><creatorcontrib>Bell, M. R.</creatorcontrib><creatorcontrib>Bentum, M. J.</creatorcontrib><creatorcontrib>Bernardi, G.</creatorcontrib><creatorcontrib>Best, P.</creatorcontrib><creatorcontrib>Bonafede, A.</creatorcontrib><creatorcontrib>Boonstra, A. J.</creatorcontrib><creatorcontrib>Brentjens, M.</creatorcontrib><creatorcontrib>Brouw, W. N.</creatorcontrib><creatorcontrib>Brüggen, M.</creatorcontrib><creatorcontrib>Butcher, H. R.</creatorcontrib><creatorcontrib>Ciardi, B.</creatorcontrib><creatorcontrib>Garrett, M. A.</creatorcontrib><creatorcontrib>Gerbers, M.</creatorcontrib><creatorcontrib>Gunst, A. W.</creatorcontrib><creatorcontrib>van Haarlem, M. P.</creatorcontrib><creatorcontrib>Heald, G.</creatorcontrib><creatorcontrib>Hoeft, M.</creatorcontrib><creatorcontrib>Holties, H.</creatorcontrib><creatorcontrib>de Jong, A.</creatorcontrib><creatorcontrib>Koopmans, L. V. E.</creatorcontrib><creatorcontrib>Kuniyoshi, M.</creatorcontrib><creatorcontrib>Kuper, G.</creatorcontrib><creatorcontrib>Loose, G. M.</creatorcontrib><creatorcontrib>Maat, P.</creatorcontrib><creatorcontrib>Masters, J.</creatorcontrib><creatorcontrib>McKean, J. P.</creatorcontrib><creatorcontrib>Meulman, H.</creatorcontrib><creatorcontrib>Mevius, M.</creatorcontrib><creatorcontrib>Munk, H.</creatorcontrib><creatorcontrib>Noordam, J. E.</creatorcontrib><creatorcontrib>Orrú, E.</creatorcontrib><creatorcontrib>Paas, H.</creatorcontrib><creatorcontrib>Pandey-Pommier, M.</creatorcontrib><creatorcontrib>Pandey, V. N.</creatorcontrib><creatorcontrib>Pizzo, R.</creatorcontrib><creatorcontrib>Polatidis, A.</creatorcontrib><creatorcontrib>Reich, W.</creatorcontrib><creatorcontrib>Röttgering, H.</creatorcontrib><creatorcontrib>Sluman, J.</creatorcontrib><creatorcontrib>Steinmetz, M.</creatorcontrib><creatorcontrib>Sterks, C. G. M.</creatorcontrib><creatorcontrib>Tagger, M.</creatorcontrib><creatorcontrib>Tang, Y.</creatorcontrib><creatorcontrib>Tasse, C.</creatorcontrib><creatorcontrib>Vermeulen, R.</creatorcontrib><creatorcontrib>van Weeren, R. J.</creatorcontrib><creatorcontrib>Wijnholds, S. J.</creatorcontrib><creatorcontrib>Yatawatta, S.</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Astronomy and astrophysics (Berlin)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hassall, T. E.</au><au>Stappers, B. W.</au><au>Hessels, J. W. T.</au><au>Kramer, M.</au><au>Alexov, A.</au><au>Anderson, K.</au><au>Coenen, T.</au><au>Karastergiou, A.</au><au>Keane, E. F.</au><au>Kondratiev, V. I.</au><au>Lazaridis, K.</au><au>van Leeuwen, J.</au><au>Noutsos, A.</au><au>Serylak, M.</au><au>Sobey, C.</au><au>Verbiest, J. P. W.</au><au>Weltevrede, P.</au><au>Zagkouris, K.</au><au>Fender, R.</au><au>Wijers, R. A. M. J.</au><au>Bähren, L.</au><au>Bell, M. E.</au><au>Broderick, J. W.</au><au>Corbel, S.</au><au>Daw, E. J.</au><au>Dhillon, V. S.</au><au>Eislöffel, J.</au><au>Falcke, H.</au><au>Grießmeier, J.-M.</au><au>Jonker, P.</au><au>Law, C.</au><au>Markoff, S.</au><au>Miller-Jones, J. C. A.</au><au>Osten, R.</au><au>Rol, E.</au><au>Scaife, A. M. M.</au><au>Scheers, B.</au><au>Schellart, P.</au><au>Spreeuw, H.</au><au>Swinbank, J.</au><au>ter Veen, S.</au><au>Wise, M. W.</au><au>Wijnands, R.</au><au>Wucknitz, O.</au><au>Zarka, P.</au><au>Asgekar, A.</au><au>Bell, M. R.</au><au>Bentum, M. J.</au><au>Bernardi, G.</au><au>Best, P.</au><au>Bonafede, A.</au><au>Boonstra, A. J.</au><au>Brentjens, M.</au><au>Brouw, W. N.</au><au>Brüggen, M.</au><au>Butcher, H. R.</au><au>Ciardi, B.</au><au>Garrett, M. A.</au><au>Gerbers, M.</au><au>Gunst, A. W.</au><au>van Haarlem, M. P.</au><au>Heald, G.</au><au>Hoeft, M.</au><au>Holties, H.</au><au>de Jong, A.</au><au>Koopmans, L. V. E.</au><au>Kuniyoshi, M.</au><au>Kuper, G.</au><au>Loose, G. M.</au><au>Maat, P.</au><au>Masters, J.</au><au>McKean, J. P.</au><au>Meulman, H.</au><au>Mevius, M.</au><au>Munk, H.</au><au>Noordam, J. E.</au><au>Orrú, E.</au><au>Paas, H.</au><au>Pandey-Pommier, M.</au><au>Pandey, V. N.</au><au>Pizzo, R.</au><au>Polatidis, A.</au><au>Reich, W.</au><au>Röttgering, H.</au><au>Sluman, J.</au><au>Steinmetz, M.</au><au>Sterks, C. G. M.</au><au>Tagger, M.</au><au>Tang, Y.</au><au>Tasse, C.</au><au>Vermeulen, R.</au><au>van Weeren, R. J.</au><au>Wijnholds, S. J.</au><au>Yatawatta, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations</atitle><jtitle>Astronomy and astrophysics (Berlin)</jtitle><date>2012-07-01</date><risdate>2012</risdate><volume>543</volume><spage>A66</spage><pages>A66-</pages><issn>0004-6361</issn><eissn>1432-0746</eissn><eissn>1432-0756</eissn><coden>AAEJAF</coden><abstract>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.</abstract><cop>Les Ulis</cop><pub>EDP Sciences</pub><doi>10.1051/0004-6361/201218970</doi><orcidid>https://orcid.org/0000-0003-2816-9492</orcidid><orcidid>https://orcid.org/0000-0002-5068-4581</orcidid><orcidid>https://orcid.org/0000-0003-3362-7996</orcidid><orcidid>https://orcid.org/0000-0003-1672-9878</orcidid><orcidid>https://orcid.org/0000-0003-2962-3220</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-6361 |
| ispartof | Astronomy and astrophysics (Berlin), 2012-07, Vol.543, p.A66 |
| issn | 0004-6361 1432-0746 1432-0756 |
| language | eng |
| recordid | cdi_hal_primary_oai_HAL_insu_01253922v1 |
| source | Bacon EDP Sciences France Licence nationale-ISTEX-PS-Journals-PFISTEX; EDP Sciences; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Astronomy Astrophysics Earth, ocean, space Exact sciences and technology ISM: general magnetic fields Physics pulsars: general Sciences of the Universe telescopes |
| title | Wide-band simultaneous observations of pulsars: disentangling dispersion measure and profile variations |
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