Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-30T12:43:09.057Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of the LISM Using Pulsar Scintillation

Published online by Cambridge University Press:  12 April 2016

N.D.R. Bhat ,
Y. Gupta  and
A.P. Rao
N.D.R. Bhat
Affiliation:
National Centre for Radio Astrophysics (TIFR), Pune 411 007, India.
Y. Gupta
Affiliation:
National Centre for Radio Astrophysics (TIFR), Pune 411 007, India.
A.P. Rao
Affiliation:
National Centre for Radio Astrophysics (TIFR), Pune 411 007, India.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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.

Type
Part IV Clouds, Ionized Gas, and Particles in the Local ISM
Information
International Astronomical Union Colloquium , Volume 166: The Local Bubble and Beyond , 1997 , pp. 211 - 214
Copyright
Copyright © Springer-Verlag 1998

References

Armstrong, J.W., Rickett, B.J., Spangler, S.R. (1995): ApJ 443, 209 CrossRefGoogle Scholar
Cordes, J.M., Weisberg, J.M., Boriakoff, V. (1985): ApJ 288, 221 CrossRefGoogle Scholar
Gupta, Y., Rickett, B.J., Lyne, A.G. (1994): MNRAS 269, 1035 CrossRefGoogle Scholar
Rickett, B.J. (1990): Ann. Rev. Astron. Ap. 28, 561 CrossRefGoogle Scholar
Snowden, S.L., Cox, D.R., McCammon, D., Sanders, W.T. (1990): ApJ 354, 211 CrossRefGoogle Scholar
Taylor, J.H., Cordes, J.M. (1993): ApJ 411, 674 CrossRefGoogle Scholar