2002A&A...383.1067P


Query : 2002A&A...383.1067P

2002A&A...383.1067P - Astronomy and Astrophysics, volume 383, 1067-1075 (2002/3-1)

Towards explanation of pulsar radio spectra.

PETROVA S.A.

Abstract (from CDS):

Refraction of radio waves in the ultrarelativistic highly magnetized pulsar plasma is considered. The influence of the effect on the observed pulsar spectra is studied. It is shown that refraction can cause a marked redistribution of the intensity in the emission beam. For a given sight-line trajectory across the beam this affects not only the apparent profile morphology but also the total intensity detected. As refraction is frequency-dependent, it can modify the pulsar spectrum. The spectral changes are peculiar to both the core and conal components. For the typical parameters of the magnetospheric plasma the effect is found to be efficient at the frequencies above 1GHz. It is demonstrated that refraction can lead to the high-frequency steepening of the core-component spectrum with the subsequent flattening at still higher frequencies. In addition, the effect can account for the inversion of the intensity ratio of the conal components and the consequent break in the spectra of the conal-double pulsars. The high-frequency features of the pulsar spectra are compared with the other observational consequences of refraction. The conclusion is made that at the frequencies above 1 GHz the properties of pulsar radiation are mainly determined by the propagation effects in the magnetospheric plasma.

Abstract Copyright:

Journal keyword(s): plasmas - waves - pulsars: general

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 PSR B0148-06 Psr 01 51 22.7400 -06 35 03.900           ~ 88 0
2 PSR B0355+54 Psr 03 58 53.7165 +54 13 13.727           ~ 400 1
3 PSR B0450-18 Psr 04 52 34.1150 -17 59 23.300           ~ 174 0
4 PSR B0450+55 Psr 04 54 07.709 +55 43 41.51           ~ 152 0
5 PSR B0525+21 Psr 05 28 52.308 +22 00 01.00     14.30     ~ 334 0
6 PSR B0823+26 Psr 08 26 51.4 +26 37 23           ~ 476 1
7 PSR B0834+06 Psr 08 37 05.642 +06 10 14.56           ~ 401 0
8 PSR B1133+16 Psr 11 36 03.0720 +15 51 15.500           ~ 621 0
9 PSR B1237+25 Psr 12 39 40.386 +24 53 49.87           ~ 422 0
10 PSR B1642-03 Psr 16 45 02.0330 -03 17 57.200           ~ 330 0
11 PSR B1706-16 Psr 17 09 26.4470 -16 40 56.200           ~ 205 0
12 PSR B1821+05 Psr 18 23 30.9731 +05 50 24.310           ~ 111 0
13 PSR B1839+56 Psr 18 40 44.608 +56 40 55.47           ~ 94 0
14 PSR B1929+10 Psr 19 32 14.0570 +10 59 33.380           ~ 708 0
15 PSR B1933+16 Psr 19 35 47.7012077756 +16 16 40.025845719           ~ 278 1
16 PSR B2021+51 Psr 20 22 49.8730 +51 54 50.233           ~ 246 1
17 PSR B2045-16 Psr 20 48 35.7700 -16 16 47.000           ~ 291 0
18 PSR B2111+46 Psr 21 13 24.2 +46 44 09           ~ 191 1

    Equat.    Gal    SGal    Ecl

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2021.07.27-20:10:48

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