On the Possibility of Determining Hubble's Parameter and the Masses of Galaxies from the Gravitational Lens Effect
Open Access
- 1 September 1964
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 128 (4) , 307-310
- https://doi.org/10.1093/mnras/128.4.307
Abstract
The gravitational lens effect is applied to a supernova lying far behind and close to the line of sight through a distant galaxy. The light from the supernova may follow two different paths to the observer, and the difference Δ t in the time of light travel for these two paths can amount to a couple of months or more, and may be measurable. It is shown that Hubble's parameter and the mass of the galaxy can be expressed by Δ t , the red-shifts of the supernova and the galaxy, the luminosities of the supernova “images” and the angle between them. The possibility of observing the phenomenon is discussed.Keywords
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