The Rv extinction factor

Details The Rv extinction factor The Rv extinction factor

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006lnea....2..189m&link_type=abstract

Lecture Notes and Essays in Astrophysics, vol. 2, p. 189-198.

Astronomy and Astrophysics

Astrophysics

Interstellar Extinction, Extinction Law, Rv Extinction Factor

Scientific paper

The extinction factor Rv can be used not only to deredden stellar fluxes (in particular in the extreme and far UV), but also to determine photometric distances for distant stars and finally, as an indicator of the size of the interstellar dust. We present here preliminary results of a work aiming at obtaining Rv values for as many stars as possible, to be included in the Spanish Virtual Observatory as a tool to get the distribution of the absorption with the distance in any direction or the approximate value of Rv in any line of sight and distance. We summarize three different methods used to determine Rv and give the results for the IR method which makes use of JHK 2MASS photometry.

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