PDA

View Full Version : dust into dust PL relationships in Cepheids



trinitree88
2009-Dec-26, 04:49 PM
Cepheid variables are pulsating stars used in the standard candle stepping-stone method to estimate distances in the universe. The relationship of the pulsation periods (P) to their intrinsic luminosities (L) is characterized by a pretty linear plot, and was the imaginative work of Henrietta Leavitt ~..a century ago. However the assumption that the extinction properties of dust in the nearby Milky Way is the same as that of the dust in some of our extragalactic neighbors may need some careful checking. SEE:http://arxiv.org/PS_cache/arxiv/pdf/0912/0912.4864v1.pdf

by David Turner. pete