Anomalous scattering of highly dispersed pulsars

Authors
Lohmer, O Kramer, M Mitra, D Lorimer, DR Lyne, AG
Citation
O. Lohmer et al., Anomalous scattering of highly dispersed pulsars, ASTROPHYS J, 562(2), 2001, pp. L157-L161
Citations number
25
Categorie Soggetti
Space Sciences
Journal title
ASTROPHYSICAL JOURNAL
ISSN journal
0004637X → ACNP
Volume
562
Issue
2
Year of publication
2001
Part
2
Pages
L157 - L161
Database
ISI
SICI code
0004-637X(200112)562:2<L157:ASOHDP>2.0.ZU;2-U
Abstract
We report multifrequency measurements of scatter-broadening times for nine highly dispersed pulsars over a wide frequency range (0.6-4.9 GHz). We find the scatter-broadening times to be larger than expected and to scale with frequency with an average power-law index of 3.44 +/- 0.13, i.e., significa ntly less than that expected from standard theories. Such possible discrepa ncies have been predicted very recently by Cordes and Lazio.