Tracking dispersion measure variations of timing array pulsars with the GMRT

Ujjwal Kumar; Yashwant Gupta; Willem Van Straten; Stefan Osłowski; Jayanta Roy; N. D R Bhat; Matthew Bailes; Michael J. Keith

doi:10.1017/S1743921312024404

Tracking dispersion measure variations of timing array pulsars with the GMRT

Ujjwal Kumar, Yashwant Gupta, Willem Van Straten, Stefan Osłowski, Jayanta Roy, N. D R Bhat, Matthew Bailes, Michael J. Keith

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

We present the results from nearly three years of monitoring of the variations in dispersion measure (DM) along the line-of-sight to 11 millisecond pulsars using the Giant Metrewave Radio Telescope (GMRT). These results demonstrate accuracies of single epoch DM estimates of the order of 5 × 10-4 cm-3 pc. A preliminary comparison with the Parkes Pulsar Timing Array (PPTA) data shows that the measured DM fluctuations are comparable. We show effects of DM variations due to the solar wind and solar corona and compare with the existing models. © 2013 International Astronomical Union.

Original language	English
Title of host publication	Proceedings of the International Astronomical Union\|Proc. Int. Astron. Union
Pages	432-434
Number of pages	2
Volume	8
DOIs	https://doi.org/10.1017/S1743921312024404
Publication status	Published - Aug 2012

Publication series

Name	IAU Symposium

Keywords

(stars:) pulsars: general
ISM: general
Sun: corona

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10.1017/S1743921312024404

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title = "Tracking dispersion measure variations of timing array pulsars with the GMRT",

abstract = "We present the results from nearly three years of monitoring of the variations in dispersion measure (DM) along the line-of-sight to 11 millisecond pulsars using the Giant Metrewave Radio Telescope (GMRT). These results demonstrate accuracies of single epoch DM estimates of the order of 5 × 10-4 cm-3 pc. A preliminary comparison with the Parkes Pulsar Timing Array (PPTA) data shows that the measured DM fluctuations are comparable. We show effects of DM variations due to the solar wind and solar corona and compare with the existing models. {\textcopyright} 2013 International Astronomical Union.",

keywords = "(stars:) pulsars: general, ISM: general, Sun: corona",

author = "Ujjwal Kumar and Yashwant Gupta and {Van Straten}, Willem and Stefan Os{\l}owski and Jayanta Roy and Bhat, {N. D R} and Matthew Bailes and Keith, {Michael J.}",

year = "2012",

month = aug,

doi = "10.1017/S1743921312024404",

language = "English",

isbn = "9781107033801",

volume = "8",

series = "IAU Symposium",

pages = "432--434",

booktitle = "Proceedings of the International Astronomical Union|Proc. Int. Astron. Union",

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TY - GEN

T1 - Tracking dispersion measure variations of timing array pulsars with the GMRT

AU - Kumar, Ujjwal

AU - Gupta, Yashwant

AU - Van Straten, Willem

AU - Osłowski, Stefan

AU - Roy, Jayanta

AU - Bhat, N. D R

AU - Bailes, Matthew

AU - Keith, Michael J.

PY - 2012/8

Y1 - 2012/8

N2 - We present the results from nearly three years of monitoring of the variations in dispersion measure (DM) along the line-of-sight to 11 millisecond pulsars using the Giant Metrewave Radio Telescope (GMRT). These results demonstrate accuracies of single epoch DM estimates of the order of 5 × 10-4 cm-3 pc. A preliminary comparison with the Parkes Pulsar Timing Array (PPTA) data shows that the measured DM fluctuations are comparable. We show effects of DM variations due to the solar wind and solar corona and compare with the existing models. © 2013 International Astronomical Union.

AB - We present the results from nearly three years of monitoring of the variations in dispersion measure (DM) along the line-of-sight to 11 millisecond pulsars using the Giant Metrewave Radio Telescope (GMRT). These results demonstrate accuracies of single epoch DM estimates of the order of 5 × 10-4 cm-3 pc. A preliminary comparison with the Parkes Pulsar Timing Array (PPTA) data shows that the measured DM fluctuations are comparable. We show effects of DM variations due to the solar wind and solar corona and compare with the existing models. © 2013 International Astronomical Union.

KW - (stars:) pulsars: general

KW - ISM: general

KW - Sun: corona

U2 - 10.1017/S1743921312024404

DO - 10.1017/S1743921312024404

M3 - Conference contribution

SN - 9781107033801

VL - 8

T3 - IAU Symposium

SP - 432

EP - 434

BT - Proceedings of the International Astronomical Union|Proc. Int. Astron. Union

ER -

Tracking dispersion measure variations of timing array pulsars with the GMRT

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Keywords

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