Study of the Local Interstellar Medium using Pulsar Scintillation

Details Study of the Local Interstellar Medium using Pulsar Scintillation Study of the Local Interstellar Medium using Pulsar Scintillation

1998-02-14

arxiv.org/abs/astro-ph/9802206v1

Lect.Notes Phys. 506 (1999) 211

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures

Scientific paper

10.1007/BFb0104721

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.

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