IS J 133658.3-295105 A RADIO SOURCE AT z ⩾ 1.0 OR AT THE DISTANCE OF M 83? (original) (raw)

RADIO DETECTION OF THE SUPERNOVA REMNANT RX J0852.024622

The X-ray source RX J0852.024622 has been recently proposed as a candidate for a young nearby supernova remnant on the basis of its X-ray (¸1.3 keV) morphology, inferred internal shock velocities, and the clear detection of 44Ti emission lines. In this Letter, we report its detection at radio wavelengths (2.4 and 1.42 GHz). The radio images match the X-ray morphology very well and show a limb-brightened source with some elongated features protruding from the outer shell. These features could be explosion fragments similar to those detected in the Vela supernova remnant. At radio frequencies the source appears to be nonthermal, with an index AaS » 20.3. This synchrotron emission seems to extend up to X-ray energies, implying the existence of very high energy electrons locally accelerated in the remnant.

Radio Observation of J 1035-201 , J 1045-294 and J 1046-293

2005

Radio observations of J1035-201, J1045-294, and J1046-293 were taken in order to characterize their structure on the parsec scale relative to their structure on the kiloparsec scale. All three sources were found to have jets on the kiloparsec scale, while only two exhibited this feature on the parsec scale. For each source, the peak core flux density at the kiloparsec scale was determined to originate almost entirely from a single pointlike source at the parsec scale. The possibility that these sources are black holes was explored and the characteristics of these potential black holes were approximated. Introduction Intense, pointlike radio sources, often accompanied by jets, have been found to exist at the center of some galaxies. These sources are known as quasars. It is hypothesized that these radio sources are supermassive black holes. The intense radio emission is thought to be radiated by matter falling into the black hole from a rapidly spinning accretion disk surrounding the...

Radio study of the extended TeV source VER J1907+062

Monthly Notices of the Royal Astronomical Society, 2019

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\mumuJy 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 o...