• Possible Alternatives to the Supermassive Black Hole at the Galactic Center

    • Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/036/04/0539-0553

    • Keywords

       

      Black holes; supermassive black holes; gravitational lensing; the Galactic Center; large telescopes; VLBI interferometry.

    • Abstract

       

      Now there are two basic observational techniques to investigate a gravitational potential at the Galactic Center, namely,

        bullet

      At the moment, one can use a small relativistic correction approach for stellar orbit analysis (however, in the future the approximation will not be precise enough due to enormous progress of observational facilities) while for smallest structure analysis in VLBI observations one really needs a strong gravitational field approximation. We discuss results of observations, their conventional interpretations, tensions between observations and models and possible hints for a new physics from the observational data and tensions between observations and interpretations. We discuss an opportunity to use a Schwarzschild metric for data interpretation or we have to use more exotic models such as Reissner–Nordstrom or Schwarzschild–de-Sitter metrics for better fits.

    • Author Affiliations

       

      A. F. Zakharov1 2 3 4 5

      1. National Astronomical Observatories of Chinese Academy of Sciences, Datun Road 20A, Beijing, 100012 China.
      2. Institute of Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218 Moscow, Russia.
      3. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna, Russia.
      4. National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409, Moscow, Russia.
      5. North Carolina Central University, Durham, NC 27707, USA.
    • Dates

       
  • Journal of Astrophysics and Astronomy | News

    • Continuous Article Publication

      Posted on January 27, 2016

      Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

© 2017-2019 Indian Academy of Sciences, Bengaluru.