Rotation measure variations for 20 millisecond pulsars

Yan, W. M.; Manchester, R. N.; Hobbs, G.; Straten, W. van; Reynolds, John E.; Wang, Na; Bailes, M.; Burke-Spolaor, S.; Champion, D. J.; Chaudhary, A.; Coles, W. A.; Hotan, A. W.; Khoo, J.; Osłowski, S.; Sarkissian, John; Yardley, D. R. B.

doi:10.1007/s10509-011-0756-0

Cited by 23 publications

(34 citation statements)

References 26 publications

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“…The observational evidences, discussed in Section 3 allow us to define a mathematical model to describe the contributions to the observed RM time series with timescale shorter than a year. As will be pointed out in Section 4, the interstellar contribution RM IISM is very small, and typically only visible on timescales of order of several years (Yan et al 2011a). We have restricted the dataset considered in this section to only several months (Table 1), so we can assume this parameter to be constant and, thus, the contribution RM IISM will not bias the estimates of the parameters of the systematics.…”

Section: Analysis Of Rm Residuals On Timescales Up To One Yearmentioning

confidence: 99%

Testing the accuracy of the ionospheric Faraday rotation corrections through LOFAR observations of bright northern pulsars

Porayko

Noutsos

Tiburzi

et al. 2018

Monthly Notices of the Royal Astronomical Society

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Faraday rotation of polarized emission from pulsars measured at radio frequencies provides a powerful tool to investigate the interstellar and interplanetary magnetic fields. However, besides being sensitive to the astrophysical media, pulsar observations in radio are affected by the highly time-variable ionosphere. In this article, the amount of ionospheric Faraday rotation has been computed by assuming a thin layer model. For this aim, ionospheric maps of the free electron density (based on Global Positioning System data) and semi-empirical geomagnetic models are needed. Through the data of five highly polarized pulsars observed with the individual German LOw-Frequency ARray stations, we investigate the performances of the ionospheric modelling. In addition, we estimate the parameters of the systematics and the correlated noise generated by the residual unmodelled ionospheric effects, and show the comparison of the different free-electron density maps. For the best ionospheric maps, we have found that the rotation measure corrections on one-year timescales after subtraction of diurnal periodicity are accurate to ∼ 0.06-0.07 rad m −2 .

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Section: Analysis Of Rm Residuals On Timescales Up To One Yearmentioning

confidence: 99%

Testing the accuracy of the ionospheric Faraday rotation corrections through LOFAR observations of bright northern pulsars

Porayko

Noutsos

Tiburzi

et al. 2018

Monthly Notices of the Royal Astronomical Society

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“…angle and derived constraint on g. The observational data of the pulsar PSR J0437-4715 [46] was used in [18]. During the whole 1609 days of observation, there were 393 data points of the polarization angle with a typical variance of a few degrees, which resulted in the constraint g 10 −12 GeV −1 × (m a /10 −21 eV).…”

Section: Radio Sourcesmentioning

confidence: 99%

Signals of axion like dark matter in time dependent polarization of light

2020

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We consider the search for axion-like particles (ALPs) by using time series data of the polarization angle of the light. If the condensation of an ALP plays the role of dark matter, the polarization plane of the light oscillates as a function of time and we may be able to detect the signal of the ALP by continuously observing the polarization. In particular, we discuss that the analysis of the Fourier-transformed data of the time-dependent polarization angle is powerful to find the signal of the ALP dark matter. We pay particular attention to the light coming from astrophysical sources such as protoplanetary disks, supernova remnants, the foreground emission of the cosmic microwave background, and so on. We show that, for the ALP mass of ∼ 10 −22 -10 −19 eV, ALP searches in the Fourier space may reach the parameter region which is unexplored by other searches yet.

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“…Also derived are the 1.4-GHz luminosities of each pulsar, L1400 = S1400 ×d 2 , where d is the 24 Barycentric Coordinate Time 25 https://ssd.jpl.nasa.gov/?ephemerides#planets 26 Recorded as part of the Parkes Pulsar Timing Array (PPTA) project (see e.g. Yan et al 2011). Table 5.…”

Section: Telescopementioning

confidence: 99%

The High Time Resolution Universe Pulsar Survey – XVI. Discovery and timing of 40 pulsars from the southern Galactic plane

Cameron

Champion

Bailes

et al. 2020

Monthly Notices of the Royal Astronomical Society

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We present the results of processing an additional 44 % of the High Time Resolution Universe South Low Latitude (HTRU-S LowLat) pulsar survey, the most sensitive blind pulsar survey of the southern Galactic plane to date. Our partially-coherent segmented acceleration search pipeline is designed to enable the discovery of pulsars in short, highly-accelerated orbits, while our 72-min integration lengths will allow us to discover pulsars at the lower end of the pulsar luminosity distribution. We report the discovery of 40 pulsars, including three millisecond pulsar-white dwarf binary systems (PSRs J1537−5312, J1547−5709 and J1618−4624), a black-widow binary system (PSR J1745−23) and a candidate black-widow binary system (PSR J1727−2951), a glitching pulsar (PSR J1706−4434), an eclipsing binary pulsar with a 1.5-yr orbital period (PSR J1653−45), and a pair of long spin-period binary pulsars which display either nulling or intermittent behaviour (PSRs J1812−15 and J1831−04). We show that the total population of 100 pulsars discovered in the HTRU-S LowLat survey to date represents both an older and lower-luminosity population, and indicates that we have yet to reach the bottom of the luminosity distribution function. We present evaluations of the performance of our search technique and of the overall yield of the survey, considering the 94 % of the survey which we have processed to date. We show that our pulsar yield falls below earlier predictions by approximately 25 % (especially in the case of millisecond pulsars), and discuss explanations for this discrepancy as well as future adaptations in RFI mitigation and searching techniques which may address these shortfalls.

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Rotation measure variations for 20 millisecond pulsars

Cited by 23 publications

References 26 publications

Testing the accuracy of the ionospheric Faraday rotation corrections through LOFAR observations of bright northern pulsars

Testing the accuracy of the ionospheric Faraday rotation corrections through LOFAR observations of bright northern pulsars

Signals of axion like dark matter in time dependent polarization of light

The High Time Resolution Universe Pulsar Survey – XVI. Discovery and timing of 40 pulsars from the southern Galactic plane

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