Can H0 be determined from giant luminous arcs?

Details Can H0 be determined from giant luminous arcs? Can H0 be determined from giant luminous arcs?

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...243...23s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 243, no. 1, March 1991, p. 23-27.

Astronomy and Astrophysics

Astrophysics

15

Galactic Clusters, Galactic Evolution, Galactic Radiation, Hubble Constant, Arcs, Galactic Rotation, Gravitational Lenses, Quasars, Red Shift

Scientific paper

A new methodology for determining the Hubble constant is proposed, which utilizes the gravitational magnification effect of rich clusters of galaxies on distant background galaxies (arcs). The gravitational magnification is in some cases great enough to detect the intrinsic rotational velocity of the source galaxy in an emission line of the spectrum of the arc. From the corresponding photometric data corrected for cosmological redshift and gravitational magnification, the apparent magnitude of the source is determined. By interpreting the velocity gradient observed along the arc in terms of rotation for the background galaxy the methodology and the dependence of various parameters on the Hubble constant are discussed.

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