GCRT J1745—3009: a precessing radio pulsar?

Zhu, W. W.; Xu, R. X.

doi:10.1111/j.1745-3933.2005.00117.x

Cited by 21 publications

(5 citation statements)

References 29 publications

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“…SSs can explain many observational phenomena in astrophysics, including pulsar glitches, sub-pulse drifts, the presence of extremely strong magnetic fields, and the transient bursts of GCRT J1745−3009 [10,23,[68][69][70][71], even for fast radio bursts related to galactic magnetars [72,73]. The tidal deformability of merging binary SSs, along with the analysis of ejecta and light curves, has been investigated in previous works [74][75][76].…”

Section: Strangeon Starmentioning

confidence: 99%

Asteroseismology of Compact Stars

Li,

Gao,

Shao

et al. 2024

Universe

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Compact stars have been perceived as natural laboratories of matter at an extremely high density. The uncertainties of the equation of state (EOS) of matter can be constrained by observing compact stars. In this review, we investigate the EOSs, global structure, and elastic properties of compact stars. We focus in detail on how to constrain the above properties of compact stars via asteroseismology. Observations that include studies of quasi-periodic oscillations from giant flares of soft gamma-ray repeaters and gravitational waves provide information about the elastic properties and internal compositions of compact stars.

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Section: Strangeon Starmentioning

confidence: 99%

Asteroseismology of Compact Stars

Li,

Gao,

Shao

et al. 2024

Universe

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“…This led its discoverers to conclude that it was beaming coherent emission to us. Second, as a transient source, it was very unusual since no other transient radio source has been observed to produce pulses with such regularity, unless one wishes to interpret it as an extreme nulling pulsar as have Zhu and Xu [33]. A third unusual feature is its unusually long period of 77 minutes.…”

Section: A Possible Messagementioning

confidence: 99%

Are Radio Pulsars Extraterrestrial Communication Beacons?

LaViolette¹

2015

Astrobiol Outreach

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Evidence is presented that radio pulsars may be artificially engineered beacons of extraterrestrial intelligence (ETI) origin. It is proposed that they are beaming signals to various targeted Galactic locations including our solar system and that their primary purpose may be for interstellar navigation. More significantly, about half a dozen pulsars appear to be marking key sky locations that convey a message intended for our Galactic locale. One of these, the Millisecond Pulsar (PSR1937 + 21), appears to make reference to the center of our Galaxy, which would be a logical shared reference point for any interstellar communication. It is noted that of all pulsars, this one comes closest to the point that lie one-radian from the Galactic center along the galactic plane. The chance that a pulsar would be positioned at this key location, as seen from our viewing perspective, and also display the highly unique attention-getting characteristics of the Millisecond Pulsar is estimated to be one chance in 7.6 trillion. Other pulsars that appear to be involved in conveying this Galactic center message include the Eclipsing Binary Millisecond pulsar (1957 + 20) and PSR 1930 + 22, both of which make highly improbable alignments relative to the Millisecond Pulsar position, the Crab and Vela pulsars, and PSR 0525 + 21. All display one or more unusual attention-getting characteristics. A method is proposed whereby a civilization might magnetically modulates the cosmic ray flux of a neutron star to produce one or more stationary, broadband, targeted synchrotron beams having pulsar-like signal characteristics. Also a lower tech approach is proposed that would instead modulate the relativistic electron beam from a linear particle accelerator to produce a pulsed free electron laser beam.

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“…We simply don't know what it is. Many reasonable natural explanations have been proposed and are currently undergoing peer review [12,9], but the question remains as to how does one definitively say that a seemingly coherent, narrow band radio transient is natural or not. Given the possible kilo-parsec distances from which this signal may emanate and the natural forces that distort it along a path to us, the answer is not certain and demands that we apply a genuine conservatism when building a probabilistic case for extraterrestrial intelligence based upon the collection of large numbers of provocative radio transients.…”

Section: Searching For Extraterrestrial Radio Transientsmentioning

confidence: 99%

Provocative radio transients and base rate bias: A Bayesian argument for conservatism

Hair

2013

Acta Astronautica

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Most searches for alien radio transmission have focused on finding omni-directional or purposefully earth-directed beams of enduring duration. However, most of the interesting signals so far detected have been transient and non-repeatable in nature. These signals could very well be the first data points in an ever-growing data base of such signals used to construct a probabilistic argument for the existence of extraterrestrial intelligence. This paper looks at the effect base rate bias could have on deciding which signals to include in such an archive based upon the likely assumption that our ability to discern natural from artificial signals will be less than perfect.

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GCRT J1745—3009: a precessing radio pulsar?

Cited by 21 publications

References 29 publications

Asteroseismology of Compact Stars

Asteroseismology of Compact Stars

Are Radio Pulsars Extraterrestrial Communication Beacons?

Provocative radio transients and base rate bias: A Bayesian argument for conservatism

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