The central velocity dispersion of the lensing galaxy in the quadruple lens system Q2237 + 0305

Details The central velocity dispersion of the lensing galaxy in the quadruple lens system Q2237 + 0305 The central velocity dispersion of the lensing galaxy in the quadruple lens system Q2237 + 0305

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...386l..43f&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 386, Feb. 20, 1992, p. L43-L45. Research supported by NSERC.

Astronomy and Astrophysics

Astrophysics

35

Gravitational Lenses, Spiral Galaxies, Velocity Distribution, Astronomical Spectroscopy, Charge Coupled Devices, Galactic Bulge, Galactic Nuclei, Telescopes

Scientific paper

A measurement of the projected central velocity dispersion for the lensing galaxy in the quadruple gravitational lens system Q2237 + 0305 is reported. Observations of the galaxy nucleus taken in superb seeing conditions with the 4.2-m William Herschel Telescope produce a value for the central velocity dispersion of 215 +/-30 km/s. The value is consistent with the predictions of theoretical models of the lensing galaxy's mass distribution, but the measurement suggests there is evidence for some degree of anisotropy in the velocity dispersion of the galaxy bulge.

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