2022MNRAS.513.1794B

Query : 2022MNRAS.513.1794B

2022MNRAS.513.1794B - Mon. Not. R. Astron. Soc., 513, 1794-1800 (2022/June-3)

Detection of strong scattering close to the eclipse region of PSR B1957+20.

BAI J.T., DAI S., ZHI Q.J., COLES W.A., LI D., ZHU W.W., HOBBS G., QIAO G.J., WANG N., YUAN J.P., FILIPOVIC M.D., WANG J.B., PAN Z.C., SHANG L.H., DANG S.J., WANG S.Q. and MIAO C.C.

Abstract (from CDS):

We present the first measurement of pulse scattering close to the eclipse region of PSR B1957+20, which is in a compact binary system with a low-mass star. We measured pulse scattering time-scales up to 0.2 ms close to the eclipse and showed that it scales with the dispersion measure (DM) excess roughly as τ ∝ ΔDM2. Our observations provide the first evidence of strong scattering due to multipath propagation effects in the eclipsing material. We show that Kolmogorov turbulence in the eclipsing material with an inner scale of ∼100 m and an outer scale of the size of the eclipse region can naturally explain the observation. Our results show that the eclipsing material in such systems can be highly turbulent and suggest that scattering is one of the main eclipsing mechanisms at around 1.4 GHz.

Abstract Copyright: © 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): scattering - binaries: eclipsing - pulsars: general - pulsars: individual: PSR B1957+20

CDS comments: In Introduction : PSR J1744+4937 (Lyne et al. 1990) is a misprint for PSR B1744-24A.

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 XSS J12270-4859 Psr 12 27 58.7476831464 -48 53 42.824592960           ~ 321 0
2 PSR J1544+4937 Psr 15 44 04.166 +49 37 57.45           ~ 89 1
3 FRB 20190520B rB 16 02 04.270 -11 17 17.32           ~ 211 0
4 PSR B1744-24A Psr 17 48 02.249 -24 46 37.65           ~ 235 0
5 PSR J1810+17 Psr 18 10 37.2791131488 +17 44 37.425884136           ~ 147 1
6 PSR J1959+2048 Psr 19 59 36.7643141520 +20 48 14.896407996   21.08 20.16 19.53 18.79 G: 854 3
7 V* LY Aqr Psr 20 51 07.52058 -08 27 37.6100           ~ 236 2

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