Please use this identifier to cite or link to this item:
http://hdl.handle.net/2289/6062
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bhat, N.D.R. | - |
dc.contributor.author | Ord, S.M. | - |
dc.contributor.author | Tremblay, S.E. | - |
dc.contributor.author | Deshpande, A.A. | - |
dc.contributor.author | Prabu, T. | - |
dc.contributor.author | Udaya Shankar, N. | - |
dc.contributor.author | Srivani, K.S. | - |
dc.contributor.author | Subrahmanyan, Ravi | - |
dc.contributor.author | +25 Co-authors | - |
dc.date.accessioned | 2014-12-11T10:03:05Z | - |
dc.date.available | 2014-12-11T10:03:05Z | - |
dc.date.issued | 2014-08-20 | - |
dc.identifier.citation | Astrophysical Journal Letters, 791, L32, 2014 | - |
dc.identifier.issn | 2041-8205 | - |
dc.identifier.issn | 2041-8213 (Online) | - |
dc.identifier.uri | http://hdl.handle.net/2289/6062 | - |
dc.description | Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations) | en |
dc.description.abstract | We report on the detection of the millisecond pulsar PSR J0437–4715 with the Murchison Wide-field Array (MWA) at a frequency of 192 MHz. Our observations show rapid modulations of pulse intensity in time and frequency that arise from diffractive scintillation effects in the interstellar medium (ISM), as well as prominent drifts of intensity maxima in the time-frequency plane that arise from refractive effects. Our analysis suggests that the scattering screen is located at a distance of ~80-120 pc from the Sun, in disagreement with a recent claim that the screen is closer (~10 pc). Comparisons with higher frequency data from Parkes reveal a dramatic evolution of the pulse profile with frequency, with the outer conal emission becoming comparable in strength to that from the core and inner conal regions. As well as demonstrating the high time resolution science capabilities currently possible with the MWA, our observations underscore the potential to conduct low-frequency investigations of timing-array millisecond pulsars, which may lead to increased sensitivity in the detection of nanoHertz gravitational waves via the accurate characterization of ISM effects | en |
dc.language.iso | en | en |
dc.relation.uri | http://adsabs.harvard.edu/abs/2014ApJ...791L..32B | en |
dc.relation.uri | http://arxiv.org/abs/1407.4745 | en |
dc.relation.uri | http://dx.doi.org/10.1088/2041-8205/791/2/L32 | en |
dc.rights | 2014 American Astronomical Society | en |
dc.subject | instrumentation: interferometers | en |
dc.subject | methods: observational | en |
dc.subject | pulsars: individual | en |
dc.subject | 24months | en |
dc.title | The low-frequency characteristics of PSR J0437–4715 observed with the Murchison wide-field array | en |
dc.type | Article | en |
Appears in Collections: | Research Papers (A&A) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2014_APhyJL_791_L32.pdf Restricted Access | Restricted Access | 405.81 kB | Adobe PDF | View/Open Request a copy |
Items in RRI Digital Repository are protected by copyright, with all rights reserved, unless otherwise indicated.