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06:14
Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
Published on: July 30, 2020
Pulsating Radio Sources near the Crab Nebula.
Science (New York, N.Y.)
|December 27, 1968
Summary
Two new sporadic radio sources, NP 0527 and NP 0532, were discovered near the Crab Nebula. Their pulse dispersions suggest significant electron densities along their lines of sight.
Area of Science:
- Astronomy and Astrophysics
- Radio Astronomy
Background:
- Pulsating radio sources, or pulsars, are rapidly rotating neutron stars emitting beams of electromagnetic radiation.
- The Crab Nebula is a supernova remnant known to contain a pulsar (the Crab Pulsar).
Purpose of the Study:
- To report the discovery of new radio sources near the Crab Nebula.
- To characterize the nature of these newly discovered radio sources.
Main Methods:
- Radio telescope observations were used to detect and locate the radio sources.
- Analysis of pulse dispersion measures was performed to estimate electron densities.
Main Results:
- Two new sporadic pulsating radio sources, NP 0527 and NP 0532, were identified.
- These sources are potentially coincident with the Crab Nebula.
- Pulse dispersion measurements indicated electron densities of 1.58 x 10^20 and 1.74 x 10^20 electrons per square centimeter for NP 0527 and NP 0532, respectively.
- No periodicities were detected for either source.
Conclusions:
- The discovery of NP 0527 and NP 0532 adds to the known population of radio sources in the vicinity of the Crab Nebula.
- The high pulse dispersions suggest these sources are located within or behind a dense ionized medium, possibly related to the Crab Nebula itself.
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