New radio observations of the composite supernova remnant G29.7-0.3

1984 ◽  
Vol 283 ◽  
pp. 154 ◽  
Author(s):  
R. H. Becker ◽  
D. J. Helfand
Keyword(s):  
Supernova Remnant ◽  
Radio Observations ◽  
New Radio

scholarly journals Radio study of the extended TeV source VER J1907+062

2019 ◽  
Vol 491 (4) ◽  
pp. 5732-5739
Author(s):  
L Duvidovich ◽  
A Petriella ◽  
E Giacani
Keyword(s):  
Atomic Hydrogen ◽  
Molecular Clouds ◽  
Supernova Remnant ◽  
Molecular Gas ◽  
Radio Observations ◽  
Very Large Array ◽  
X Ray ◽  
New Radio ◽  
Γ Ray ◽  
Pulsar Wind

ABSTRACT This paper aims to provide new insights on the origin of the TeV source VER J1907+062 through new high-quality radio observations. We used the Karl G. Jansky Very Large Array (VLA) to observe the whole extension of VER J1907+062 at 1.5 GHz with a mosaicking technique and the PSR J1907+0602 in a single pointing at 6 GHz. These data were used together with 12CO and atomic hydrogen observations obtained from public surveys to investigate the interstellar medium in the direction of VER J1907+062. The new radio observations do not show any evidence of a pulsar wind nebula (PWN) driven by the pulsars present in the field and no radio counterpart to the proposed X-ray PWN powered by PSR J1907+0602 is seen in the new VLA image at 6 GHz down to a noise level of 10 $\mu$Jy beam−1. Molecular clouds were discovered over the eastern, southern, and western borders of the radio shell of G40.5−0.5, suggesting an association with this supernova remnant. We explored several scenarios for the origin of VER J1907+062. We propose as the most probable scenario one in which the TeV emission is produced by two separated γ-ray sources located at different distances: one of leptonic origin and associated with a PWN powered by PSR J1907+0602 at ∼3.2 kpc and another of hadronic origin and produced by the interaction between G40.5−0.5 and the surrounding molecular gas at ∼8.7 kpc.

Supernova Remnant Searches at Molonglo

1984 ◽  
Vol 5 (4) ◽  
pp. 537-540 ◽  
Author(s):  
A. J. Turtle ◽  
B. Y. Mills
Keyword(s):  
Supernova Remnants ◽  
Supernova Remnant ◽  
Magellanic Clouds ◽  
Radio Observations ◽  
X Ray

A catalogue of 38 supernova remnants (SNRs) identified in the Large and Small Magellanic Clouds from X-ray, optical and radio observations has recently been presented by Mills et al. (1984). One important consideration is the completeness of this catalogue and of the Galactic catalogues with which it is compared. These are currently being investigated.

scholarly journals Some Observations of Shell-type Galactic Radio Sources

1967 ◽  
Vol 20 (3) ◽  
pp. 297 ◽  
Author(s):  
ER Hill
Keyword(s):  
Radio Emission ◽  
Spherical Symmetry ◽  
Supernova Remnants ◽  
Supernova Remnant ◽  
Milky Way ◽  
Radio Sources ◽  
Radio Observations ◽  
Shell Type ◽  
Rosette Nebula ◽  
Galactic Radio

Radio evidence for two new supernova remnants in the Southern Milky Way is presented. Some new observations of the known supernova remnant, source 1439-62, and of the Rosette nebula, a shell source but not a supernova remnant, are also presented. The problem of finding model shells to fit the radio observations is considered and it is shown that the radio emission from 1439-62 is unlikely to originate in a shell with spherical symmetry.

scholarly journals G18.95-1.1, A Composite Supernova Remnant Interacting with the Ambient Interstellar Medium

1988 ◽  
Vol 101 ◽  
pp. 253-256
Author(s):  
E. Fürst ◽  
W. Reich ◽  
E. Hummel ◽  
Y. Sofue
Keyword(s):  
Spectral Line ◽  
Interstellar Medium ◽  
Radio Source ◽  
Supernova Remnant ◽  
Radio Continuum ◽  
New Radio ◽  
Galactic Radio

AbstractNew radio continuum and spectral line observations of the Galactic radio source G18.95-1.1 are reported. The distance to G18.95-1.1 is 2 kpc as derived from HI-21 cm spectral line observations. These data also indicate an interaction with the interstellar medium. The radio continuum observations classify G18.95-1.1 as a composite supernova remnant.

scholarly journals High supernova rate and enhanced star-formation triggered in M81-M82 encounter

2006 ◽  
Vol 2 (S237) ◽  
pp. 391-391
Author(s):  
B. Arbutina ◽  
D. Urošević ◽  
B. Vukotić
Keyword(s):  
Star Formation ◽  
Supernova Remnant ◽  
Close Encounter ◽  
Nearby Galaxy ◽  
Radio Observations ◽  
General Belief ◽  
Normal Galaxies

It is a general belief that the starburst activity of a nearby galaxy M82 was triggered in a close encounter with its massive companion M81, a few tens of million years ago. Despite the lack of supernovae observed, multiwavelength radio observations of M82 discovered a considerable number of compact supernova remnant candidates. We use these remnants to estimate the supernova rate (SNR) and the enhanced star-formation (SFR) rate in M82, and compare them with rates in normal galaxies.

scholarly journals Multifrequency radio observations of a SNR in the LMC: The case of SNR J0527-6549 (DEM l204)

2010 ◽  
pp. 43-49 ◽  
Author(s):  
L.M. Bozzetto ◽  
M.D. Filipovic ◽  
E.J. Crawford ◽  
I.S. Bojicic ◽  
J.L. Payne ◽  
...  
Keyword(s):  
Spectral Index ◽  
Supernova Remnant ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
High Order ◽  
Older Age ◽  
Radio Observations ◽  
Large Size ◽  
Peak Value ◽  
Compact Array

We present a detailed study and results of new Australia Telescope Compact Array (ATCA) observations of supernova remnant SNR J0527-6549. This Large Magellanic Cloud (LMC) object follows a typical supernova remnant (SNR) horseshoe morphology with a diameter of D=(66?58)?1 pc which is among the largest SNRs in the LMC. Its relatively large size indicates older age while a steeper than expected radio spectral index of ?=-0.92?0.11 is more typical of younger and energetic SNRs. Also, we report detections of regions with a high order of polarization at a peak value of ~54%?17% at 6 cm.

scholarly journals SNR G320.4-01.2 and PSR B1509-58: new radio observations of a complex interacting system

1999 ◽  
Vol 305 (3) ◽  
pp. 724-736 ◽  
Author(s):  
B. M. Gaensler ◽  
K. T. S. Brazier ◽  
R. N. Manchester ◽  
S. Johnston ◽  
A. J. Green
Keyword(s):  
Radio Observations ◽  
New Radio

VLBA ASTROMETRY OF LS 5039 AND PSR J1825-1446: WHICH SOURCE IS RELATED TO SNR G016.8-01.1?

2012 ◽  
Vol 08 ◽  
pp. 372-375
Author(s):  
J. MOLDÓN ◽  
M. RIBÓ ◽  
J. M. PAREDES ◽  
W. BRISKEN ◽  
M. KRAMER ◽  
...  
Keyword(s):  
Binary System ◽  
Proper Motion ◽  
Supernova Remnant ◽  
Gamma Ray ◽  
Compact Object ◽  
Radio Observations ◽  
First Results

The supernova remnant SNR G016.8-01.1 is close to the gamma-ray binary system LS 5039, one of the five gamma-ray binaries currently known. LS 5039 appears to have been born in the SNR G016.8-01.1 just ~ 105 yr ago, as indicated by its proper motion. This association would provide direct implications on the nature and properties of the unknown compact object in the binary system. However, there is another source close to SNR G016.8-01.1 that could have been born during the SN explosion: the pulsar PSR J1825-1446, for which the proper motion is unknown. We are measuring the proper motion of both sources by means of VLBI radio observations in order to constrain their origin. Here we present the first results of a VLBA campaign on PSR J1825-1446 to measure its proper motion. We discuss the possible kinematical age of this pulsar, and the possible association of LS 5039 and PSR J1825-1446 with the supernova remnant.

scholarly journals Observations of magnetic fields in intracluster medium

2012 ◽  
Vol 10 (H16) ◽  
pp. 404-405
Author(s):  
Federica Govoni
Keyword(s):  
Magnetic Fields ◽  
Galaxy Clusters ◽  
Intracluster Medium ◽  
Radio Observations ◽  
New Techniques ◽  
New Radio

AbstractThe presence of μG-level magnetic fields associated with the intracluster medium of galaxy clusters is now widely acknowledged. Our knowledge of their properties has greatly improved in the recent years thanks to both new radio observations and the developments of new techniques to interpret data.

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