Skip to main content Accessibility help
×
Home
Hostname: page-component-55597f9d44-t4qhp Total loading time: 0.281 Render date: 2022-08-09T05:55:30.528Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "useRatesEcommerce": false, "useNewApi": true } hasContentIssue true

Tracking dispersion measure variations of timing array pulsars with the GMRT

Published online by Cambridge University Press:  20 March 2013

Ujjwal Kumar
Affiliation:
National Centre for Radio Astrophysics, Pune University Campus, Postbag 3, India411007 email: ujjwal@ncra.tifr.res.in
Yashwant Gupta
Affiliation:
National Centre for Radio Astrophysics, Pune University Campus, Postbag 3, India411007 email: ujjwal@ncra.tifr.res.in
Willem van Straten
Affiliation:
Centre for Astrophysics & Supercomputing, Swinburne University of Technology, Australia
Stefan Osłowski
Affiliation:
Centre for Astrophysics & Supercomputing, Swinburne University of Technology, Australia Australia Telescope National Facility, CSIRO, Australia
Jayanta Roy
Affiliation:
National Centre for Radio Astrophysics, Pune University Campus, Postbag 3, India411007 email: ujjwal@ncra.tifr.res.in
N. D. R. Bhat
Affiliation:
Centre for Astrophysics & Supercomputing, Swinburne University of Technology, Australia International Centre for Radio Astronomy Research, Curtin University, Australia
Matthew Bailes
Affiliation:
Centre for Astrophysics & Supercomputing, Swinburne University of Technology, Australia
Michael J. Keith
Affiliation:
Australia Telescope National Facility, CSIRO, Australia
Rights & Permissions[Opens in a new window]

Abstract

HTML view is not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2013

References

Ahuja, A. L., Gupta, Y., Mitra, D., & Kembhavi, A. K. 2005, MNRAS, 357, 1013CrossRefGoogle Scholar
Ahuja, A. L., Mitra, D., & Gupta, Y. 2007, MNRAS, 377, 677CrossRefGoogle Scholar
Backer, D. C., Hama, S., & Van Hook, S. 1993, ApJ, 404, 636CrossRefGoogle Scholar
Hobbs, G. B., Lyne, A. G., Kramer, M., Martin, C. E., & Jordan, C. 2004, MNRAS, 353, 1311CrossRefGoogle Scholar
Manchester, R. N. 2011, astro-ph.HE, arXiv:1101.5202v1Google Scholar
Roy, J., Gupta, Y., Pen, U., et al. 2010, astro-ph.IM, arXiv:0910.1517Google Scholar
You, X. P., Hobbs, G., Coles, W. A., Manchester, R. N., et al. 2007, MNRAS, 378, 493CrossRefGoogle Scholar
You, X. P., Hobbs, G. B., Coles, W. A., et al. 2007, MNRAS, 671, 907Google Scholar
You have Access
1
Cited by

Save article to Kindle

To save this article to your Kindle, first ensure coreplatform@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Tracking dispersion measure variations of timing array pulsars with the GMRT
Available formats
×

Save article to Dropbox

To save this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Dropbox account. Find out more about saving content to Dropbox.

Tracking dispersion measure variations of timing array pulsars with the GMRT
Available formats
×

Save article to Google Drive

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

Tracking dispersion measure variations of timing array pulsars with the GMRT
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *