The NANOGrav 11 yr data set: Solar wind sounding through pulsar timing

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The NANOGrav 11 yr data set: Solar wind sounding through pulsar timing

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dc.contributor.author Madison, D. R.
dc.contributor.author Cordes, J. M.
dc.contributor.author Arzoumanian, Z.
dc.contributor.author Chatterjee, S.
dc.contributor.author Crowter, K.
dc.contributor.author DeCesar, M. E.
dc.contributor.author Demorest, P. B.
dc.contributor.author Dolch, T.
dc.contributor.author Ellis, J. A.
dc.contributor.author Ferdman, R. D.
dc.contributor.author Ferrara, E. C.
dc.contributor.author Fonseca, E.
dc.contributor.author Gentile, P. A.
dc.contributor.author Jones, G.
dc.contributor.author Jones, M. L.
dc.contributor.author Lam, M. T.
dc.contributor.author Levin, L.
dc.contributor.author Lorimer, D. R.
dc.contributor.author Lynch, R. S.
dc.contributor.author McLaughlin, M. A.
dc.contributor.author Mingarelli, C. M. F.
dc.contributor.author Ng, C.
dc.contributor.author Nice, David J.
dc.contributor.author Pennucci, T. T.
dc.contributor.author Ransom, S. M.
dc.contributor.author Ray, P. S.
dc.contributor.author Spiewak, R.
dc.contributor.author Stairs, I. H.
dc.contributor.author Stovall, K.
dc.contributor.author Swiggum, J. K.
dc.contributor.author Zhu, W. W.
dc.date.accessioned 2019-03-07T14:18:57Z
dc.date.available 2019-03-07T14:18:57Z
dc.date.issued 2019-02-20
dc.identifier.citation Madison, D. R., et al. (2019 Feb 20) "The NANOGrav 11 yr data set: Solar wind sounding through pulsar timing." Astrophysical Journal 872 (2): Article 150. en_US
dc.identifier.uri http://hdl.handle.net/10385/2839
dc.description.abstract The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) has observed dozens of millisecond pulsars for over a decade. We have accrued a large collection of dispersion measure (DM) measurements sensitive to the total electron content between Earth and the pulsars at each observation. All lines of sight cross through the solar wind (SW), which produces correlated DM fluctuations in all pulsars. We develop and apply techniques for extracting the imprint of the SW from the full collection of DM measurements in the recently released NANOGrav 11 yr data set. We filter out long-timescale DM fluctuations attributable to structure in the interstellar medium and carry out a simultaneous analysis of all pulsars in our sample that can differentiate the correlated signature of the wind from signals unique to individual lines of sight. When treating the SW as spherically symmetric and constant in time, we find the electron number density at 1 au to be 7.9 +/- 0.2 cm(-3). We find our data to be insensitive to long-term variation in the density of the wind. We argue that our techniques paired with a high-cadence, low-radio-frequency observing campaign of near-ecliptic pulsars would be capable of mapping out large-scale latitudinal structure in the wind. en_US
dc.publisher Astrophysical Journal en_US
dc.subject ISM: structure en_US
dc.subject pulsars: general en_US
dc.subject solar wind en_US
dc.title The NANOGrav 11 yr data set: Solar wind sounding through pulsar timing en_US
dc.type Article en_US
dc.identifier.doi 10.3847/1538-4357/ab01fd

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