Precise determination of the distances of galaxies

Details Precise determination of the distances of galaxies Precise determination of the distances of galaxies

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980srst.coll..263t&link_type=abstract

In NASA. Marshall Space Flight Center Sci. Res. with the Space Telescope p 263-293 (SEE N80-22130 12-88)

Other

10

Distance, Galaxies, Hubble Space Telescope, Astronomical Photometry, Hubble Diagram, Red Shift, Supernovae, Velocity Distribution

Scientific paper

The use of the Space Telescope in the determination of the distances of galaxies is examined. The Space Telescope can check the local extragalactic distance scale to within 10-15 percent. The determination of relative distances of cosmic standard candles, viz. brightest M-supergiants and SNe I in E galaxies, is discussed. The M-supergiants map the velocity field out to vo approx. 3000 km s(-1) thus providing a firm basis for the determination of Ho (global) from local distances, and the possibility to derive precise distances of all nearby field galaxies from their recession velocities. Photometry of the SNe I out to z = 0.5 leads to a direct determination of qo via the Hubble diagram, and the form of their light curves offers a fundamental test on the nature of redshifts. Other calculations are discussed.

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