VLA structure of variable radio sources in the Galactic plane

1988 ◽  
Vol 95 ◽  
pp. 1149 ◽  
Author(s):  
Nebojsa Duric ◽  
P. C. Gregory
Keyword(s):  
Galactic Plane ◽  
Radio Sources ◽  
Variable Radio

scholarly journals VARIABLE RADIO SOURCES IN THE GALACTIC PLANE

2010 ◽  
Vol 140 (1) ◽  
pp. 157-166 ◽  
Author(s):  
Robert H. Becker ◽  
David J. Helfand ◽  
Richard L. White ◽  
Deanne D. Proctor
Keyword(s):  
Galactic Plane ◽  
Radio Sources ◽  
Variable Radio

Millimeter observations of variable radio sources in the Galactic plane

1999 ◽  
Vol 23 (5-6) ◽  
pp. 1019-1023
Author(s):  
T Tsutsumi ◽  
N Duric
Keyword(s):  
Galactic Plane ◽  
Radio Sources ◽  
Variable Radio

H I observations of eight variable radio sources in the galactic plane

1993 ◽  
Vol 106 ◽  
pp. 1087 ◽  
Author(s):  
Gregory B. Taylor ◽  
Douglas A. Roberts
Keyword(s):  
Galactic Plane ◽  
Radio Sources ◽  
Variable Radio

scholarly journals Infrared observations of highly variable radio sources in the galactic plane

1993 ◽  
Vol 260 (4) ◽  
pp. 883-892 ◽  
Author(s):  
A. J. Norton ◽  
M. J. Coe ◽  
S. J. Unger ◽  
B. Margon ◽  
A. C. Phillips
Keyword(s):  
Galactic Plane ◽  
Radio Sources ◽  
Infrared Observations ◽  
Variable Radio

scholarly journals Flux density measurements of variable radio sources at   8.96 mm (33.5 GHz)

1981 ◽  
Vol 194 (4) ◽  
pp. 961-966 ◽  
Author(s):  
A. M. Flett ◽  
C. Henderson
Keyword(s):  
Flux Density ◽  
Radio Sources ◽  
Density Measurements ◽  
Variable Radio

scholarly journals The magnetic structure of our Galaxy: a review of observations

2008 ◽  
Vol 4 (S259) ◽  
pp. 455-466 ◽  
Author(s):  
JinLin Han
Keyword(s):  
Magnetic Fields ◽  
Magnetic Structure ◽  
Large Scale ◽  
Galactic Halo ◽  
Galactic Center ◽  
Galactic Plane ◽  
Galactic Disk ◽  
Dust Emission ◽  
Measure Data ◽  
Radio Sources

AbstractThe magnetic structure in the Galactic disk, the Galactic center and the Galactic halo can be delineated more clearly than ever before. In the Galactic disk, the magnetic structure has been revealed by starlight polarization within 2 or 3 kpc of the Solar vicinity, by the distribution of the Zeeman splitting of OH masers in two or three nearby spiral arms, and by pulsar dispersion measures and rotation measures in nearly half of the disk. The polarized thermal dust emission of clouds at infrared, mm and submm wavelengths and the diffuse synchrotron emission are also related to the large-scale magnetic field in the disk. The rotation measures of extragalactic radio sources at low Galactic latitudes can be modeled by electron distributions and large-scale magnetic fields. The statistical properties of the magnetized interstellar medium at various scales have been studied using rotation measure data and polarization data. In the Galactic center, the non-thermal filaments indicate poloidal fields. There is no consensus on the field strength, maybe mG, maybe tens of μG. The polarized dust emission and much enhanced rotation measures of background radio sources are probably related to toroidal fields. In the Galactic halo, the antisymmetric RM sky reveals large-scale toroidal fields with reversed directions above and below the Galactic plane. Magnetic fields from all parts of our Galaxy are connected to form a global field structure. More observations are needed to explore the untouched regions and delineate how fields in different parts are connected.

Variable Radio Sources at 843 MHz

1994 ◽  
Vol 11 (1) ◽  
pp. 33-38 ◽  
Author(s):  
D. Campbell-Wilson ◽  
R. W. Hunstead
Keyword(s):  
Interstellar Medium ◽  
Flux Density ◽  
Large Amplitude ◽  
Preliminary Report ◽  
Radio Sources ◽  
Amplitude Variability ◽  
Variable Radio

AbstractThis paper is a preliminary report on the flux density monitoring of calibration sources used at the Molonglo Observatory Synthesis Telescope. We show two examples of large amplitude variability at 843 MHz which we attribute to refractive scintillation in the Galactic interstellar medium.

scholarly journals A Catalogue of Galactic Radio Sources

1968 ◽  
Vol 21 (3) ◽  
pp. 369 ◽  
Author(s):  
MJL Kesteven
Keyword(s):  
Flux Density ◽  
Spectral Index ◽  
Galactic Plane ◽  
Radio Sources ◽  
Galactic Radio

The results of a survey of radio sources in the galactic plane in the longitude range 1800 to 400 with the 1 mile Molonglo Cross telescope at 408 MHz are presented. The methods of observation and reduction are described briefly. The catalogue lists the position, flux density, size, and spectral index for 80 sources

Four Southern Intraday Variable Radio Sources

1998 ◽  
Vol 164 ◽  
pp. 271-272 ◽  
Author(s):  
L. L. Kedziora-Chudczer ◽  
D. L. Jauncey ◽  
M. H. Wieringa ◽  
J. E. Reynolds ◽  
A. K. Tzioumis
Keyword(s):  
Flux Density ◽  
Progress Report ◽  
Radio Sources ◽  
High Flux ◽  
Inverted Spectrum ◽  
Spectrum Radio ◽  
Variable Radio

AbstractThis is a progress report on the ATCA IDV survey of compact, flat or inverted spectrum radio sources. We found that four sources: PKS 0405–385, PKS 1034–293, PKS 1144–397, and PKS 1519–273 out of the sample of 125 show high flux density variability on the daily timescale. The characteristics of observed IDV are discussed and we reflect on its possible origin.

scholarly journals Variable Radio Sources

1982 ◽  
Vol 97 ◽  
pp. 317-324 ◽  
Author(s):  
R. Fanti ◽  
L. Padrielli ◽  
M. Salvati
Keyword(s):  
Energy Supply ◽  
Theoretical Models ◽  
Accelerated Expansion ◽  
Radio Sources ◽  
Relativistic Electrons ◽  
Plasma Cloud ◽  
Basic Process ◽  
Continuous Energy ◽  
Galactic Radio ◽  
Variable Radio

Flux variations are a common feature of flat spectrum compact extra-galactic radio sources. Detailed analysis and quantitative comparisons with theoretical models (e.g. van der Laan, 1966) are difficult due to the complex characteristics of the flux variations, which generally appear to consist of different outbursts blended together in time. Nevertheless, the general consensus is that the basic process has been correctly identified and consists in an expansion of a synchrotron radiating plasma cloud of relativistic electrons and magnetic field partially opaque to its own radiation. The main differences between data and predictions of the theory are that the variations propagate too fast and with too large amplitude toward lower frequencies. This behaviour however may be indicative of continuous energy supply and consequent accelerated expansion.

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