Supernovae pp 760-765 | Cite as

An Estimate of the Distance to M100 in the Virgo Cluster via VLBI of SN1979C: Updates and Prospects

  • Norbert Bartel
Part of the Santa Cruz Summer Workshops in Astronomy and Astrophysics book series (SANTA CRUZ)


A VLBI determination, at time t after the explosion, of the angular radius, Θ, of a supernova’s radiosphere, coupled with an optical-spectroscopic determination of the radial expansion velocity ν shock, at time t0 after the explosion, of the supernova’s shockfront allows estimates to be made of the distance, D., to the supernova’s host galaxy and of Hubble’s constant (BARTEL [1]; BARTEL et al. [2]; see also BARTEL [3], for a comparison of this method with other methods (e.g., BRANCH [4]) that use supernovae as distance indicators):
$$D = \frac{{vshockt\mu \eta }}{{\Theta m\kappa }}{{\left[ {\frac{t}{{{{t}_{0}}}}} \right]}^{{m - 1}}} $$
$${{H}_{0}} = \frac{{\nu redshift + \nu \inf all}}{D} $$


Radio Emission Deceleration Parameter Expansion Velocity Brightness Distribution Host Galaxy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer-Verlag New York, Inc. 1991

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  • Norbert Bartel

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