Abstract
We present here the results from an extensive scintillation study of twenty pulsars in the dispersion measure (DM) range 3 – 35 pc cm−3 carried out using the Ooty Radio Telescope, to investigate the distribution of ionized material in the local interstellar medium (LISM). Our analysis reveals several anomalies in the scattering strength, which suggest that the distribution of scattering material in the solar neighborhood is not uniform. Our model suggests the presence of a low density bubble surrounded by a shell of much higher density fluctuations. We are able to put some constraints on geometrical and scattering properties of such a structure, and find it to be morphologically similar to the local bubble known from other studies.
This is a preview of subscription content, log in via an institution to check access.
Preview
Unable to display preview. Download preview PDF.
References
Armstrong, J.W., Rickett, B.J., Spangler, S.R. (1995): ApJ 443, 209
Cordes, J.M., Weisberg, J.M., Boriakoff, V. (1985): ApJ 288, 221
Gupta, Y., Rickett, B.J., Lyne, A.G. (1994): MNRAS 269, 1035
Rickett B.J. (1990): Ann. Rev. Astron. Ap. 28, 561
Snowden, S.L., Cox, D.P., McCammon, D., Sanders, W.T. (1990): ApJ 354, 211
Taylor, J.H., Cordes, J.M. (1993): ApJ 411, 674
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1998 Springer-Verlag
About this paper
Cite this paper
Bhat, N.D.R., Gupta, Y., Rao, A.P. (1998). Study of the LISM using pulsar scintillation. In: Breitschwerdt, D., Freyberg, M., Trümper, J. (eds) The Local Bubble and Beyond Lyman-Spitzer-Colloquium. Lecture Notes in Physics, vol 506. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0104721
Download citation
DOI: https://doi.org/10.1007/BFb0104721
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-64306-7
Online ISBN: 978-3-540-69726-8
eBook Packages: Springer Book Archive