Observations of some further Pulsed Radio Sources

Pilkington, J. D. H.; Hewish, A.; Bell, S.; Cole, T. W.

doi:10.1038/218126a0

Cited by 119 publications

(40 citation statements)

References 4 publications

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“…Wheeler (1966) wrote "In all the physics of the postwar era it is difficult to name any situation more enveloped in paradox than the phenomenon of gravitational collapse". Then, in the following year (1967), more than three decades after the initial prediction of neutron stars, pulsars were discovered, finally signalling the existence of neutron stars Pilkington et al 1968;Hewish 1970). Not surprisingly, this bolstered belief in the existence of stellar mass black holes (e.g.…”

Section: Historical Development: Frommentioning

confidence: 99%

Galaxy Bulges and Their Massive Black Holes: A Review

Graham

2016

Astrophysics and Space Science Library

121

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With references to both key and oft-forgotten pioneering works, this article starts by presenting a review into how we came to believe in the existence of massive black holes at the centres of galaxies. It then presents the historical development of the near-linear (black hole)-(host spheroid) mass relation, before explaining why this has recently been dramatically revised. Past disagreement over the slope of the (black hole)-(velocity dispersion) relation is also explained, and the discovery of substructure within the (black hole)-(velocity dispersion) diagram is discussed. As the search for the fundamental connection between massive black holes and their host galaxies continues, the competing array of additional black hole mass scaling relations for samples of predominantly inactive galaxies are presented.

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Section: Historical Development: Frommentioning

confidence: 99%

Galaxy Bulges and Their Massive Black Holes: A Review

Graham

2016

Astrophysics and Space Science Library

121

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“…This is another of the original four pulsars discovered at Cambridge (Pilkington et al 1968) that has a classic two-component profile and has been studied at many different frequencies. At low radio frequencies, the two components are of comparable amplitude (Bilous et al 2016) but, as Fig.…”

Section: Psr J1136+1551 (B1133+16)mentioning

confidence: 99%

“…This famous pulsar, one of the original four pulsars discovered at Cambridge (Pilkington et al 1968), has been extensively studied over a wide frequency range. The profile has a weak interpulse and bridge emission with the separation of the main component and interpulse close to 150…”

Section: Psr J0659+1414 (B0656+14)mentioning

confidence: 99%

TMRT Observations of 26 Pulsars at 8.6 GHz

Zhao

Yan

et al. 2017

ApJ

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Integrated pulse profiles at 8.6 GHz obtained with the Shanghai Tian Ma Radio Telescope (TMRT) are presented for a sample of 26 pulsars. Mean flux densities and pulse width parameters of these pulsars are estimated. For eleven pulsars these are the first high-frequency observations and for a further four, our observations have a better signal-to-noise ratio than previous observations. For one (PSRs J0742−2822) the 8.6 GHz profiles differs from previously observed profiles. A comparison of 19 profiles with those at other frequencies shows that in nine cases the separation between the outmost leading and trailing components decreases with frequency, roughly in agreement with radius-to-frequency mapping, whereas in the other ten the separation is nearly constant. Different

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“…For approximately one hour the flux density of the pulsar increased and peaked at Smax = 16.4 Jy (see Table 2). PSR J0953+0755 (Pilkington et al 1968) has a low dispersion measure (DM) of 2.95 cm −3 pc and spin period of 0.25 s (Hobbs et al 2004a). This pulsar is known to scintillate at low frequencies, for example, Phillips & Clegg (1992) report observations consistent with diffractive scintillation.…”

Section: Psr J0953+0755 (B0950+08)mentioning

confidence: 99%

Time-domain and spectral properties of pulsars at 154 MHz

Bell

Murphy

Johnston

et al. 2016

Mon. Not. R. Astron. Soc.

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We present 154 MHz Murchison Widefield Array imaging observations and variability information for a sample of pulsars. Over the declination range −80• < δ < 10• we detect 17 known pulsars with mean flux density greater than 0.3 Jy. We explore the variability properties of this sample on timescales of minutes to years. For three of these pulsars, PSR J0953+0755, PSR J0437−4715 and PSR J0630−2834 we observe interstellar scintillation and variability on timescales of greater than 2 minutes. One further pulsar, PSR J0034−0721, showed significant variability, the physical origins of which are difficult to determine. The dynamic spectra for PSR J0953+0755 and PSR J0437−4715 show discrete time and frequency structure consistent with diffractive interstellar scintillation and we present the scintillation bandwidth and timescales from these observations. The remaining pulsars within our sample were statistically non-variable. We also explore the spectral properties of this sample and find spectral curvature in pulsars PSR J0835−4510, PSR J1752−2806 and PSR J0437−4715.

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Observations of some further Pulsed Radio Sources

Cited by 119 publications

References 4 publications

Galaxy Bulges and Their Massive Black Holes: A Review

Galaxy Bulges and Their Massive Black Holes: A Review

TMRT Observations of 26 Pulsars at 8.6 GHz

Time-domain and spectral properties of pulsars at 154 MHz

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