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Title: THE CRAB PULSAR AT CENTIMETER WAVELENGTHS. I. ENSEMBLE CHARACTERISTICS

Abstract

We have observed the pulsar in the Crab Nebula at high radio frequencies and high time resolution. We present continuously sampled data at 640 ns time resolution and individual bright pulses recorded at down to 0.25 ns time resolution. Combining our new data with previous data from our group and from the literature shows the dramatic changes in the pulsar’s radio emission between low and high radio frequencies. Below about 5 GHz the mean profile is dominated by the bright Main Pulse and Low-Frequency Interpulse. Everything changes, however, above about 5 GHz; the Main Pulse disappears and the mean profile of the Crab pulsar is dominated by the High-Frequency Interpulse (which is quite different from its low-frequency counterpart) and the two High-Frequency Components. We present detailed observational characteristics of these different components which future models of the pulsar’s magnetosphere must explain.

Authors:
;  [1];
  1. Physics Department, New Mexico Tech, Socorro, NM 87801 (United States)
Publication Date:
OSTI Identifier:
22522010
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 802; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; CRAB NEBULA; GHZ RANGE; PULSARS; RADIOWAVE RADIATION; STAR MODELS; STELLAR MAGNETOSPHERES; WAVELENGTHS

Citation Formats

Hankins, T. H., Eilek, J. A., E-mail: thankins@aoc.nrao.edu, and Jones, G.. THE CRAB PULSAR AT CENTIMETER WAVELENGTHS. I. ENSEMBLE CHARACTERISTICS. United States: N. p., 2015. Web. doi:10.1088/0004-637X/802/2/130.
Hankins, T. H., Eilek, J. A., E-mail: thankins@aoc.nrao.edu, & Jones, G.. THE CRAB PULSAR AT CENTIMETER WAVELENGTHS. I. ENSEMBLE CHARACTERISTICS. United States. doi:10.1088/0004-637X/802/2/130.
Hankins, T. H., Eilek, J. A., E-mail: thankins@aoc.nrao.edu, and Jones, G.. Wed . "THE CRAB PULSAR AT CENTIMETER WAVELENGTHS. I. ENSEMBLE CHARACTERISTICS". United States. doi:10.1088/0004-637X/802/2/130.
@article{osti_22522010,
title = {THE CRAB PULSAR AT CENTIMETER WAVELENGTHS. I. ENSEMBLE CHARACTERISTICS},
author = {Hankins, T. H. and Eilek, J. A., E-mail: thankins@aoc.nrao.edu and Jones, G.},
abstractNote = {We have observed the pulsar in the Crab Nebula at high radio frequencies and high time resolution. We present continuously sampled data at 640 ns time resolution and individual bright pulses recorded at down to 0.25 ns time resolution. Combining our new data with previous data from our group and from the literature shows the dramatic changes in the pulsar’s radio emission between low and high radio frequencies. Below about 5 GHz the mean profile is dominated by the bright Main Pulse and Low-Frequency Interpulse. Everything changes, however, above about 5 GHz; the Main Pulse disappears and the mean profile of the Crab pulsar is dominated by the High-Frequency Interpulse (which is quite different from its low-frequency counterpart) and the two High-Frequency Components. We present detailed observational characteristics of these different components which future models of the pulsar’s magnetosphere must explain.},
doi = {10.1088/0004-637X/802/2/130},
journal = {Astrophysical Journal},
number = 2,
volume = 802,
place = {United States},
year = {Wed Apr 01 00:00:00 EDT 2015},
month = {Wed Apr 01 00:00:00 EDT 2015}
}