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Does Tiny-Scale Atomic Structure Exist in the Interstellar Medium?
2003
Astrophysical Journal
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We report on preliminary results from the recent multi-epoch neutral hydrogen absorption measurements toward three pulsars, B0823+26, B1133+16 and B2016+28, using the Arecibo telescope. We do not find significant variations in optical depth profiles over periods of 0.3 and 9--10 yr, or on spatial scales of 10--20 and 70--85 AU. The large number of non detections of the tiny scale atomic structure suggests that the AU-sized structure is not ubiquitous in the interstellar medium and could be quite a rare phenomenon.
doi:10.1086/380580
fatcat:fl5cn6dljjbejnvyfdbvbadwvm