Pulsar Slowdown Rates for CP 0328 and HP 1506

Cole, T. W.

doi:10.1038/223487a0

Cited by 14 publications

(6 citation statements)

References 4 publications

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“…Cole 1969;Staelin & Reifenstein 1968;Rankin et al 1970) continued at low radio frequencies (defined here as <300 MHz). However, despite the fact that most pulsars are intrinsically brightest in this frequency range, since then the vast majority of pulsars have been discovered and studied at frequencies in the range 300-2000 MHz; much of our knowledge of the properties of the radio emission mechanism stems from studies at these frequencies and above.…”

Section: Introductionmentioning

confidence: 99%

Observing pulsars and fast transients with LOFAR

Stappers

Hessels

Alexov

et al. 2011

A&A

213

160

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Low frequency radio waves, while challenging to observe, are a rich source of information about pulsars. The LOw Frequency ARray (LOFAR) is a new radio interferometer operating in the lowest 4 octaves of the ionospheric "radio window": 10-240 MHz, that will greatly facilitate observing pulsars at low radio frequencies. Through the huge collecting area, long baselines, and flexible digital hardware, it is expected that LOFAR will revolutionize radio astronomy at the lowest frequencies visible from Earth. LOFAR is a next-generation radio telescope and a pathfinder to the Square Kilometre Array (SKA), in that it incorporates advanced multi-beaming techniques between thousands of individual elements. We discuss the motivation for low-frequency pulsar observations in general and the potential of LOFAR in addressing these science goals. We present LOFAR as it is designed to perform high-time-resolution observations of pulsars and other fast transients, and outline the various relevant observing modes and data reduction pipelines that are already or will soon be implemented to facilitate these observations. A number of results obtained from commissioning observations are presented to demonstrate the exciting potential of the telescope. This paper outlines the case for low frequency pulsar observations and is also intended to serve as a reference for upcoming pulsar/fast transient science papers with LOFAR.

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Section: Introductionmentioning

confidence: 99%

Observing pulsars and fast transients with LOFAR

Stappers

Hessels

Alexov

et al. 2011

A&A

213

160

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show abstract

“…If the goal is compliance, a directed teaching method is the best fit with a syllabus. If the goal is for miners to become grounded in the mining context, an effective teaching method is one that helps workers better understand how to solve problems using the tools and resources at hand in their work environment [Cole 2002].…”

Section: Discussionmentioning

confidence: 99%

“…In essence, direct instruction as an instructional model is not the best way to train workers in higher-order concepts and skills because it "has limitations related to the influences of human thinking and social interaction as these apply to both individual and group behavior. The model is also less adequate for explaining [and changing] behavior in the more open, self-directed situations that describe [dynamic work settings]" [Cole 2002].…”

Section: Using a Syllabusmentioning

confidence: 99%

“…"Under this view, safety education becomes a process of helping…workers to better understand the constraints and plights under which they work and to better identify and use the resources, knowledge, and tools available to their social group. The goal is to help the group become more proactive in improving health and safety within their community of workers" [Cole 2002].…”

Section: Using a Curriculummentioning

confidence: 99%

See 1 more Smart Citation

Guidelines for the development of a new miner training curriculum.

Vaught¹,

Mallett²

2008

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This report is intended to help mine safety trainers better prepare to teach the influx of new underground coal miners who are entering the industry. This is done by identifying two different approaches to instruction and discussing the ways they may affect how well prepared new hires are to deal with a dynamic and hazardous workplace. One approach is based on the use of a syllabus. Those using a syllabus are more likely to rely on lecturing or direct instruction. This is a good way to get across factual information, but does not provide a context within which miners can fit the discrete facts so that they form an integrated whole set of concepts, principles, and skills. The other approach is based on the use of a curriculum. Those using a curriculum may be more likely to help miners integrate concepts and skills that give them an overall picture of the complex mining environment and how they fit into the workplace. This will better prepare them for the decision-making and problem-solving activities that will help them work safely and productively.

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“…The spin-down of pulsars is one of the most prominent features of their rotation (Davies et al 1969, Cole 1969. Considering the magnetic field of a neutron star in a vacuum to have dipolar configuration and assuming that the magnetic axis is misaligned with the rotation axis, it must radiate and lose energy, which contributes to the observed slow down (Gunn & Ostriker 1969).…”

Section: Introductionmentioning

confidence: 99%

Timing of young radio pulsars – II. Braking indices and their interpretation

Parthasarathy

Johnston

Shannon

et al. 2020

Monthly Notices of the Royal Astronomical Society

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In Paper I of this series, we detected a significant value of the braking index (n) for 19 young, high-E radio pulsars using ∼ 10 years of timing observations from the 64-m Parkes radio telescope. Here we investigate this result in more detail using a Bayesian pulsar timing framework to model timing noise and to perform selection to distinguish between models containing exponential glitch recovery and braking index signatures. We show that consistent values of n are maintained with the addition of substantial archival data, even in the presence of glitches. We provide strong arguments that our measurements are unlikely due to exponential recovery signals from unseen glitches even though glitches play a key role in the evolution of a pulsar's spin frequency. We conclude that, at least over decadal time scales, the value of n can be significantly larger than the canonical 3 and discuss the implications for the evolution of pulsars.

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Pulsar Slowdown Rates for CP 0328 and HP 1506

Cited by 14 publications

References 4 publications

Observing pulsars and fast transients with LOFAR

Observing pulsars and fast transients with LOFAR

Guidelines for the development of a new miner training curriculum.

Timing of young radio pulsars – II. Braking indices and their interpretation

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