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Victor Herrero Radio Astronomy Blog

Interferometric study of PSR B0329+54 and the interstellar medium, at 324 MHz, with maximum baselines near 1 light second

12 Jul 2015, 21:49 UTC
Interferometric study of PSR B0329+54 and the interstellar medium, at 324 MHz, with maximum baselines near 1 light second
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With many thanks, I refer to:"PSR B0329+54: Substructure in the scatter-broadened image discovered with RadioAstron on baselines of up to 235,000 km"    Popov, M. V.; Andrianov, A. S.; Bartel, N.; Gwinn, C. R.; Johnson, M. D.; Joshi, B. C.; Kardashev, N. S.; Karuppusamy, R.; Kovalev, Y. Y.; Kramer, M.; Rudnitskii, A. G.; Safutdinov, E. R.; Shishov, V. I.; Smirnova, T. V.; Soglasnov, V. A.; Zensus, J. A.; Zhuravlev, V. I.http://arxiv.org/abs/1501.0444925 references at:http://adsabs.harvard.edu/cgi-bin/nph-ref_query?bibcode=2015arXiv150104449P&refs=REFERENCES&db_key=PREAbstract: "We studied scattering properties of the pulsar PSR B0329+54 with a ground-space radio interferometer RadioAstron which included the 10-m Space Radio Telescope, the 110-m Green Bank Telescope, the 14x25-m Westerbork Synthesis Radio Telescope, and the 64-m Kalyazin Radio Telescope. The observations were performed at 324 MHz on baselines of up to 235,000 km in November 2012 and January 2014. At short ground-space baselines of less than about 20,000 km, the visibility amplitude decreases with the projected baseline length, providing a direct measurement of the diameter of the scattering disk of 4.7±0.9 mas. The size of the diffraction spot near Earth is 15,000±3,000 km. At longer baselines of up to 235,000 km, where no interferometric detection of the scattering disk would be expected, significant visibilities were observed with amplitudes ...

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