Observations of the Neutral Hydrogen in the Barred Spiral Galaxies NGC 3992 and NGC 4731

We report observations of the atomic hydrogen properties of the barred spiral galaxies NGC 3992 and NGC 4731. These systems were observed in 1980 and 1981 with the VLA telescope of the National Radio Astronomy Observatory. In Table 1 we list the systemic parameters of interest.

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Radio Emission Of The Nuclei Of Barred Spiral Galaxies

Australian Journal of Physics ◽

10.1071/ph660883 ◽

1966 ◽

Vol 19 (6) ◽

pp. 883 ◽

Cited By ~ 7

Keyword(s):

Radio Emission ◽

Radio Telescope ◽

Radio Astronomy ◽

Spiral Galaxies ◽

Astronomy Observatory ◽

Radio Observations ◽

Barred Galaxies ◽

Radio Astronomy Observatory ◽

Barred Spiral Galaxies

The results of radio observations of 98 barred galaxies at 11, 21, and 75 cm are presented. The observations were carried out with the 210 ft radio telescope of the Australian National Radio Astronomy Observatory and with the Mills Cross of the Sydney Uni

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A Low Resolution Hydrogen-line Survey of the Magellanic System. I. Observations and Digital Reduction Procedures

Australian Journal of Physics ◽

10.1071/ph630552 ◽

1963 ◽

Vol 16 (4) ◽

pp. 552 ◽

Cited By ~ 9

Author(s):

JV Hindman ◽

RX McGee ◽

AWL Carter ◽

ECJ Holmes ◽

M Beard

Keyword(s):

Radio Telescope ◽

Radio Astronomy ◽

Neutral Hydrogen ◽

Recording System ◽

Digital Recording ◽

Astronomy Observatory ◽

Hydrogen Line ◽

Radio Astronomy Observatory ◽

Line Survey ◽

Magellanic System

A survey of neutral hydrogen in the Clouds of Magellan has been made using a digital recording system in conjunction with a multichannel receiver and a 21 ft aerial. The system has been developed for use with the 210 ft radio telescope of the Australian National Radio Astronomy Observatory at Parkes, N.S.W.

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Design, environmental and sustainability constraints of new African observatories: The example of the Mozambique Radio Astronomy Observatory

2013 Africon ◽

10.1109/afrcon.2013.6757829 ◽

2013 ◽

Author(s):

Domingos Barbosa ◽

Miguel Bergano ◽

Valerio A. R. M. Ribeiro ◽

Anita Loots ◽

Venkatasubramani L. Thondikulam ◽

...

Keyword(s):

Radio Astronomy ◽

Astronomy Observatory ◽

Radio Astronomy Observatory

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On the peculiarities in the spin-down of isolated radio pulsars

Proceedings of the International Astronomical Union ◽

10.1017/s1743921312023666 ◽

2012 ◽

Vol 8 (S291) ◽

pp. 208-208

Author(s):

Augustine Chukwude

Keyword(s):

Radio Astronomy ◽

Time Resolution ◽

Local Phase ◽

Astronomy Observatory ◽

Radio Pulsars ◽

Short Term ◽

Radio Astronomy Observatory ◽

Long Term Changes ◽

Timing Data

AbstractWe investigate the spin-down behaviour of a sample of 25 radio pulsars on decadal timescales (~ 18 years) using a continuous timing data obtained over a period of at Hartebeesthoek Radio Astronomy Observatory (HartRAO). Particular attention is placed on achieving a better time resolution of both the short-term and long-term changes in pulsar spin-down using local phase-coherent measurements of the spin-down rates (). We demonstrate that the spin-down of radio pulsars is generally complicated by a superposition of processes that may or may not be related. Specifically, our results show that (i) for 7 pulsars, the observed spin-down variation is largely stochastic, characterized by random and sustained jumps in of varying amplitudes, (ii) for 9 objects, the spin-down evolution shows dominant monotonic variations in superimposed on short-term stochastic jumps in the parameter, and (iii) for the remaining 9 pulsars, the long-term spin-down evolution is non-monotonic, dominated by some systematic excursion in the measured spin-down rates.

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