2001A&A...368..230K


Query : 2001A&A...368..230K

2001A&A...368..230K - Astronomy and Astrophysics, volume 368, 230-238 (2001/3-2)

No low-frequency turn-over in the spectra of millisecond pulsars.

KUZMIN A.D. and LOSOVSKY B.Y.

Abstract (from CDS):

We present the results of the first low frequency measurements of the flux densities of a large sample of millisecond pulsars (MSPs) at 102 and 111MHz. Combining our observations with data at higher frequencies borrowed from the literature, we constructed the spectra of 30 MSPs in the 0.1 to 4.8GHz frequency range. Our flux density measurements extend the known spectra of MSPs to the lowest frequency to date. The coverage of a low frequency range allows us to search for low frequency turn-over, which is often observed for normal pulsars. We find that spectra of MSPs differ from those of normal pulsars, showing no low-frequency turn-over typical of normal pulsars. We suggest that the geometry of the radio emission region of MSPs differs from that of normal pulsars: the magnetic field configuration in MSPs' magnetospheres may deviate from that of a pure dipole and/or the radio emission region may be radially compressed. Monochromatic luminosities at this low frequency and the integral luminosity over the 0.1-4.8GHz frequency range were determined and their dependence on other pulsar parameters analyzed.

Abstract Copyright:

Journal keyword(s): stars: pulsars: general - stars: magnetic fields stars: neutrons - radio continuum: stars

Simbad objects: 32

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Number of rows : 32
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 J0030+0451 Psr 00 30 27.4277 +04 51 39.710           ~ 292 1
2 PSR J0034-05 Psr 00 34 21.8281 -05 34 36.620           ~ 163 0
3 PSR J0218+42 Psr 02 18 06.3604 +42 32 17.365           ~ 306 2
4 PSR B0613-02.0 Psr 06 13 43.9759 -02 00 47.228           ~ 213 1
5 PSR J0621+10 Psr 06 21 22.11108 +10 02 38.7410           ~ 98 1
6 PSR J0751+1807 Psr 07 51 09.1539 +18 07 38.335           ~ 261 1
7 PSR J1012+5307 Psr 10 12 33.4341531837 +53 07 02.564526788     19.5     DA 330 1
8 PSR J1022+10 Psr 10 22 58.011 +10 01 52.85           ~ 189 2
9 PSR J1024-0719 Psr 10 24 38.697 -07 19 19.07           ~ 194 0
10 PSR B1257+12 Psr 13 00 03.1075 +12 40 55.155           ~ 484 1
11 PSR J1312+1810 Psr 13 12 55 +18 10.0           ~ 40 1
12 M 53 GlC 13 12 55.25 +18 10 05.4   8.95 7.79     ~ 750 0
13 PSR J1518+4904 Psr 15 18 16.832 +49 04 34.19           ~ 163 1
14 PSR B1534+11 Psr 15 37 09.9603 +11 55 55.554           ~ 403 1
15 PSR B1620-26 Psr 16 23 38.2218 -26 31 53.769     21.30     ~ 276 2
16 PSR J1640+2224 Psr 16 40 16.74231 +22 24 08.9413           ~ 139 0
17 PSR B1639+36A Psr 16 41 40.880 +36 27 15.44           ~ 41 1
18 M 13 GlC 16 41 41.634 +36 27 40.75     5.8     ~ 2063 0
19 PSR J1713+0447 Psr 17 13 49.53053 +07 47 37.5264           ~ 378 1
20 PSR J1730-2304 Psr 17 30 21.6483 -23 04 31.400           ~ 119 1
21 PSR J1744-1134 Psr 17 44 29.4172 -11 34 54.710           ~ 219 1
22 PSR B1855+09 Psr 18 57 36.39161 +09 43 17.2322           DA 488 1
23 PSR J1911-11 Psr 19 11 49.2927 -11 14 22.330           ~ 66 1
24 PSR J2019+24 Psr 20 19 31.94900 +24 25 15.3038           ~ 125 1
25 PSR J2033+1736 Psr 20 33 16.9140125568 +17 37 48.044242017   11.59 10.50     ~ 49 0
26 V* LY Aqr Psr 20 51 07.5145 -08 27 37.795           ~ 172 2
27 PSR J2129+1209C Psr 21 30 01.2030 +12 10 38.159           ~ 175 2
28 PSR B2145-07.8 Psr 21 45 50.45590 -07 50 18.5900           ~ 233 0
29 PSR J2229+26 Psr 22 29 50.8864 +26 43 57.785           ~ 86 1
30 PSR J2235+1506 Psr 22 35 43.7001 +15 06 49.060           ~ 35 0
31 PSR J2317+1439 Psr 23 17 09.230 +14 39 31.18           ~ 156 1
32 PSR J2322+2057 Psr 23 22 22.35595 +20 57 02.9390           ~ 88 1

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2021.08.06-05:11:54

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