A 5 GHz VLA survey of the galactic plane

1994 ◽  
Vol 91 ◽  
pp. 347 ◽  
Author(s):  
Robert H. Becker ◽  
Richard L. White ◽  
David J. Helfand ◽  
S. Zoonematkermani
Keyword(s):  
Galactic Plane ◽  
5 Ghz

scholarly journals CORNISH: A 5 GHz VLA survey of the Galactic plane

2009 ◽  
Vol 5 (H15) ◽  
pp. 781-781
Author(s):  
Cormac R. Purcell ◽  
Melvin G. Hoare ◽  
Keyword(s):  
Star Formation ◽  
Galactic Plane ◽  
Radio Continuum ◽  
High Mass ◽  
Mass Star ◽  
Multi Wavelength ◽  
Region 10 ◽  
5 Ghz ◽  
Infrared Survey ◽  
Key Questions

AbstractThe CORNISH (Co-Ordinated Radio ‘N’ Infrared Survey for High-mass star formation) project is the radio continuum part of a series of multi-wavelength surveys of the Galactic Plane that focus on the northern GLIMPSE-I region (10° < l <65°, |b| < 1°) observed by the SPITZER satellite in the mid-infrared (Churchwell et al. 2009). CORNISH has delivered a complementary 5 GHz arcsecond resolution, radio-continuum survey to address key questions in high-mass star formation as well as many other areas of astrophysics.

scholarly journals A Catalogue of 5 GHz Galactic Plane Sources

1979 ◽  
Vol 32 (4) ◽  
pp. 415
Author(s):  
RF Haynes ◽  
JL Caswell ◽  
LWJ Simons
Keyword(s):  
Point Source ◽  
Brightness Temperature ◽  
Galactic Plane ◽  
5 Ghz

A catalogue at 5 GHz of 915 sources in the galactic plane is presented. Sources with a peak beam brightness temperature of at least 0�2 K above the surrounding background are included, except in confused regions; a point source of 0�2 K corresponds to o� 26 Jy.

scholarly journals Radio Stars of the SKA

Universe ◽  
2021 ◽  
Vol 7 (5) ◽  
pp. 119
Author(s):  
Bin Yu ◽  
Albert Zijlstra ◽  
Biwei Jiang
Keyword(s):  
Radio Emission ◽  
Milky Way ◽  
Galactic Plane ◽  
High Sensitivity ◽  
Hii Regions ◽  
Be Stars ◽  
M Dwarfs ◽  
Ob Stars ◽  
5 Ghz ◽  
Radio Stars

Radio emission from stars can be used, for example, to study ionized winds or stellar flares. The radio emission is faint and studies have been limited to few objects. The Square Kilometer Array (SKA) brings a survey ability to the topic of radio stars. In this paper we investigate what the SKA can detect, and what sensitivity will be required for deep surveys of the stellar Milky Way. We focus on the radio emission from OB stars, Be stars, flares from M dwarfs, and Ultra Compact HII regions. The stellar distribution in the Milky Way is simulated using the Besançon model, and various relations are used to predict their radio flux. We find that the full SKA will easily detect all UltraCompact HII regions. At the limit of 10 nJy at 5 GHz, the SKA can detect 1500 Be stars and 50 OB stars per square degree, out to several kpc. It can also detect flares from 4500 M dwarfs per square degree. At 100 nJy, the numbers become about 8 times smaller. SKA surveys of the Galactic plane should be designed for high sensitivity. Deep imaging should consider the significant number of faint flares in the field, even outside the plane of the Milky Way.

Deep Survey of the Radio Continuum Emission along the Southern Galactic Plane at 2·4 GHz

1995 ◽  
Vol 12 (1) ◽  
pp. 54-59 ◽  
Author(s):  
A. R. Duncan ◽  
R. T. Stewart ◽  
R. F. Haynes ◽  
K. L. Jones
Keyword(s):  
Large Scale ◽  
Galactic Plane ◽  
Radio Continuum ◽  
Continuum Emission ◽  
Total Power ◽  
Latitude Range ◽  
Power Maps ◽  
Deep Survey ◽  
5 Ghz ◽  
Linear Polarisation

AbstractWe have just completed the observational stage of a 2·4 GHz survey of the Southern Galactic Plane, using the Parkes radiotelescope, between 238° ≤ l ≤ 365° and with a latitude range of at least |b| ≤ 5° (beamwidth ~9 arcmin). The survey details both continuum emission and linear polarisation down to rms noises of approximately 12 and 4 mJy/beam respectively. It is the most sensitive survey to date of the southern plane at this frequency and should nicely complement the Effelsberg northern plane surveys in addition to the recent southern surveys such as the 843 MHz MOST survey and the 5 GHz PMN survey. The total-power maps are now completed, and reduction of the polarisation data is still in progress. In addition to compact HII regions and extragalactic sources, we are detecting on our total-power images a considerable amount of large-scale structure, and a significant number of new SNR candidates and spur-like features.

scholarly journals A Southern Hemisphere Survey of the Galactic Plane at 5 GHz

1978 ◽  
Vol 31 (4) ◽  
pp. 351
Author(s):  
RF Haynes ◽  
JL Caswell ◽  
LWJ Simons
Keyword(s):  
Detection Limit ◽  
Southern Hemisphere ◽  
Galactic Plane ◽  
Point Sources ◽  
Half Power ◽  
5 Ghz ◽  
Better Than

Seventy five maps are presented showing the 5 GHz emission from the galactic plane in the range I = 190� ~ 360� .... 40� for - 2� < b < 2� (an area of approximately 600 square egrees). The method of observing and the computer reduction of the data are discussed. the telescope resolution is 4'�1 arc to half-power points and the detection limit for point sources is better than 0�5 Jy.

scholarly journals The Boomerang: A Crushed and Re-born PWN?

2004 ◽  
Vol 218 ◽  
pp. 213-214
Author(s):  
Roland Kothes ◽  
Bülent Uyaniker ◽  
Wolfgang Reich
Keyword(s):  
Shock Wave ◽  
Radio Telescope ◽  
Galactic Plane ◽  
Low Frequency ◽  
Radio Spectrum ◽  
Frequency Data ◽  
Radio Luminosity ◽  
Reverse Shock ◽  
Pulsar Wind ◽  
5 Ghz

We present new high radio frequency observations of the Boomerang pulsar wind nebula (PWN) made with the Effelsberg 100-m radio telescope. A comparison with low frequency data from the Canadian Galactic Plane Survey (CGPS; Taylor et al. 2003) reveals a change of the nebula's emission structure with frequency caused by a radial steepening of the radio spectrum above 5 GHz. We also find evidence that the reverse shock of the initial supernova shock wave has driven away or crushed the original PWN which might explain why the current nebula around the pulsar has such a low radio luminosity.

scholarly journals A 10-GHZ Radio Continuum Survey of the Galactic Plane

1987 ◽  
Vol 115 ◽  
pp. 538-539
Author(s):  
T. Handa ◽  
Y. Sofue ◽  
N. Nakai ◽  
H. Hirabayashi ◽  
K. Akabane ◽  
...  
Keyword(s):  
Galactic Plane ◽  
Noise Temperature ◽  
Radio Continuum ◽  
Beam Size ◽  
Calibration Source ◽  
Polarization Component ◽  
Radio Observatory ◽  
System Noise ◽  
Ngc 7027 ◽  
5 Ghz

A radio continuum survey of the galactic plane has been made with the 45-m telescope of the Nobeyama Radio Observatory at 10.55 GHz, which is the highest frequency among such surveys. The sensitivity of the telescope was Tb/S = 0.47 K/Jy and the HPBW was 2!6, which was a great advantage because of the same beam size of the Bonn 5-GHz survey (Altenhoff et al. 1978). The receiver was a cooled parametric amplifier. The instantaneous bandwidth was 500 MHz, and the system noise temperature was about 100 K. The calibration source was NGC 7027, which was assumed to be 6.6 Jy. One circular polarization component was observed. The observational parameters are summarized in Table I.

scholarly journals The coordinated radio and infrared survey for high-mass star formation

2018 ◽  
Vol 615 ◽  
pp. A103 ◽  
Author(s):  
I. E. Kalcheva ◽  
M. G. Hoare ◽  
J. S. Urquhart ◽  
S. Kurtz ◽  
S. L. Lumsden ◽  
...  
Keyword(s):  
Star Formation ◽  
Massive Star ◽  
Galactic Plane ◽  
High Mass ◽  
Spectral Energy ◽  
Mass Star ◽  
Large Area ◽  
Massive Star Formation ◽  
Extended Source ◽  
5 Ghz

A catalogue of 239 ultra-compact H II  regions (UCHIIs) found in the CORNISH survey at 5 GHz and 1.5″ resolution in the region 10° < l < 65°,  |b| < 1° is presented. This is the largest complete and well-selected sample of UCHIIs to date and provides the opportunity to explore the global and individual properties of this key state in massive star formation at multiple wavelengths. The nature of the candidates was validated, based on observational properties and calculated spectral indices, and the analysis is presented in this work. The physical sizes, luminosities and other physical properties were computed by utilising literature distances or calculating the distances whenever a value was not available. The near- and mid-infrared extended source fluxes were measured and the extinctions towards the UCHIIs were computed. The new results were combined with available data at longer wavelengths and the spectral energy distributions (SEDs) were reconstructed for 177 UCHIIs. The bolometric luminosities obtained from SED fitting are presented. By comparing the radio flux densities to previous observational epochs, we find about 5% of the sources appear to be time variable. This first high-resolution area survey of the Galactic plane shows that the total number of UCHIIs in the Galaxy is ~750 – a factor of 3–4 fewer than found in previous large area radio surveys. It will form the basis for future tests of models of massive star formation.

scholarly journals Two New Planetary Nebulae and an AGN in the Galactic Plane

1999 ◽  
Vol 16 (2) ◽  
pp. 134-138 ◽  
Author(s):  
S. H. Beer ◽  
A. E. Vaughan
Keyword(s):  
Radio Emission ◽  
Planetary Nebula ◽  
Galactic Plane ◽  
Angular Size ◽  
Planetary Nebulae ◽  
Optical Spectra ◽  
Radio Flux ◽  
Low Resolution ◽  
5 Ghz

AbstractA search for planetary nebulae was carried out using candidates selected by their infrared colours and 5 GHz radio emission. One new planetary nebula was identified on the basis of its small angular size, strong [O iii] emission and infrared colours. Another object, known as the possible planetary nebula Wray 16–28, is similarly identified as a planetary nebula. An undiscovered AGN was also found, and is classed as a Seyfert 2 galaxy on the basis of its strong O iii emission, linewidths of ∼500 km s−1, and 5 GHz radio flux. Low-resolution optical spectra are presented and distance estimates discussed.

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