Resonance Rings in Galaxies as New Tertiary Distance Indicators

Details Resonance Rings in Galaxies as New Tertiary Distance Indicators Resonance Rings in Galaxies as New Tertiary Distance Indicators

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aj....137.3455w&link_type=abstract

The Astronomical Journal, Volume 137, Issue 3, pp. 3455-3478 (2009).

Statistics

1

Distance Scale, Galaxies: Elliptical And Lenticular, Cd, Galaxies: Spiral, Galaxies: Statistics

Scientific paper

Recently, statistical correlations were found between near-infrared luminosities and ring sizes in field resonance-ringed galaxies. These correlations are proposed as a new class of tertiary distance indicators in the nearby universe (where redshifts lsim30, 000kms-1). The most suitable application of the indicators will be to measure the Hubble constant. Detailed formulae are derived to evaluate distances to field ringed galaxies and H 0, as well as the error levels involved in using this method. Numerical simulations show that through the measurements of over a thousand nearby ringed galaxies the method can yield a value of H 0 with its root-mean-square random error within ≈6% and systematic error most likely below ≈10% (excluding the systematic error due to other indicators that are used to calibrate the correlations). Future such measurements should help to check the H 0 values from conventional methods.

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