Shared more. Cited more. Safe forever.
    • advanced search
    • submit works
    • about
    • help
    • contact us
    • login
    View Item 
    •   MOspace Home
    • University of Missouri-Columbia
    • College of Arts and Sciences (MU)
    • Department of Physics and Astronomy (MU)
    • Physics and Astronomy publications (MU)
    • View Item
    •   MOspace Home
    • University of Missouri-Columbia
    • College of Arts and Sciences (MU)
    • Department of Physics and Astronomy (MU)
    • Physics and Astronomy publications (MU)
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    advanced searchsubmit worksabouthelpcontact us

    Browse

    All of MOspaceCommunities & CollectionsDate IssuedAuthor/ContributorTitleIdentifierThesis DepartmentThesis AdvisorThesis SemesterThis CollectionDate IssuedAuthor/ContributorTitleIdentifierThesis DepartmentThesis AdvisorThesis Semester

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular AuthorsStatistics by Referrer

    Progress in Measurements of the Gravitational Bending of Radio Waves Using the VLBA

    Fomalont, Edward B.
    Kopeikin, Sergei M.
    Lanyi, G.
    Benson, J.
    View/Open
    [PDF] ProgressMeasurementsGravitationalBending.pdf (301.5Kb)
    Date
    2009
    Format
    Article
    Metadata
    [+] Show full item record
    Abstract
    We have used the Very Long Baseline Array (VLBA) at 43, 23, and 15 GHz to measure the solar gravitational deflection of radio waves among four radio sources during an 18 day period in 2005 October. Using phase- referenced radio interferometry to fit the measured phase delay to the propagation equation of the parameterized post-Newtonian formalism, we have determined the deflection parameter γ = 0.9998 ± 0.0003 (68% confidence level), in agreement with general relativity. The results come mainly from 43 GHz observations where the refraction effects of the solar corona were negligible beyond 3 deg from the Sun. The purpose of this experiment is three-fold: to improve on the previous results in the gravitational bending experiments near the solar limb; to examine and evaluate the accuracy limits of terrestrial VLBI techniques; and to determine the prospects and outcomes of future experiments. Our conclusion is that a series of improved designed experiments with the VLBA could increase the presented accuracy by at least a factor of 4.
    URI
    http://hdl.handle.net/10355/6818
    Citation
    The Astrophysical Journal, 699:1395-1402, 2009 July 10
    Collections
    • Physics and Astronomy publications (MU)

    Send Feedback
    hosted by University of Missouri Library Systems
     

     


    Send Feedback
    hosted by University of Missouri Library Systems