Discovery of shell-like radio-structure in SN1993J
Article Abstract:
The radio observations of supernova SN1993J in the M81 galaxy reveal the development of a shell structure in the supernova. The radio observations are performed using very-long-baseline interferometry. The radio shell is only eight months old and exhibits a spherical symmetry. The variations in the brightness of the different regions in the shell indicate that the density of the shell may not be uniform. The radio observations also help study the development of the supernova remnant and its reaction to the nearby interstellar medium.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
A magnetic switch that determines the speed of astrophysical jets
Article Abstract:
Many schemes are proposed for astrophysical jet production, but Blandford and Payne's magnetized accretion disk model is applicable to all systems. However the source of variation in jet morphology is still unclear. Time-dependent numerical simulations of jet formation are reported, indicating that the jet character and speed relies on the domination of magnetic forces over gravity in the accretion disk corona. This explains the existence of known extragalactic radio sources and the variations in their properties.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Relativistic motion in a nearby bright X-ray source
Article Abstract:
The study of high-resolution radio observations of second Galactic superluminal radio source GRO J1655-40 reveals the relativistic motion between two components of the radio source. The two components are moving away from each other at speeds, greater than that of the speed of light. This relativistic motion between the two objects is attributed to the ejection of material from these two astronomical objects, at relativistic speeds in the course of accretion into a blackhole.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1995
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Use of implanted radiotransmitters to estimate survival of greater sage-grouse chicks. Total plasma protein and re nesting by greater sage-grouse
- Abstracts: Severe neuropathies in mice with targeted mutations in the ErbB3 receptor. Tha mammalian sodium channel BNC1 is required for normal touch sensation
- Abstracts: Coupling of surface temperatures and atmospheric [CO.sub.2] concentrations during the Paleozoic era. Evidence for decoupling of atmospheric CO2 and global climate during the Phanerozoic eon
- Abstracts: Expect more delays. A stability limit for the atmospheres of giant extrasolar planets
- Abstracts: Holliday junctions cleaved by Rad1? Structure of a multisubunit complex that promotes DNA branch migration. DNA helicases get physical