The application of multiview methods for high-precision astrometric space VLBI at low frequencies

Richard Dodson, Maria Rioja, Y. Asaki, H. Imai, X.-Y. Hong, Z. Shen

    Research output: Contribution to journalArticle

    7 Citations (Scopus)

    Abstract

    High-precision astrometric space very long baseline interferometry (S-VLBI) at the low end of the conventional frequency range, i.e., 20 cm, is a requirement for a number of high-priority science goals. These are headlined by obtaining trigonometric parallax distances to pulsars in pulsar-black hole pairs and OH masers anywhere in the Milky Way and the Magellanic Clouds. We propose a solution for the most difficult technical problems in S-VLBI by the MultiView approach where multiple sources, separated by several degrees on the sky, are observed simultaneously. We simulated a number of challenging S-VLBI configurations, with orbit errors up to 8 m in size and with ionospheric atmospheres consistent with poor conditions. In these simulations we performed MultiView analysis to achieve the required science goals. This approach removes the need for beam switching requiring a Control Moment Gyro, and the space and ground infrastructure required for high-quality orbit reconstruction of a space-based radio telescope. This will dramatically reduce the complexity of S-VLBI missions which implement the phase-referencing technique. © 2013. The American Astronomical Society. All rights reserved.
    Original languageEnglish
    Pages (from-to)11pp
    JournalAstronomical Journal
    Volume145
    Issue number6
    DOIs
    Publication statusPublished - 2013

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