Geometric Distances to Cepheids with Light Echoes

Details Geometric Distances to Cepheids with Light Echoes Geometric Distances to Cepheids with Light Echoes

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..482r&link_type=abstract

NOAO Proposal ID #2008B-0482

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Scientific paper

We propose the search for light echoes around Galactic Cepheids. Light echoes offer the opportunity to determine the geometrical distance to the source of the light echoes. Cepheids are a key step in the extra- galactic distance ladder, and the distance determination with light echoes is independent of other methods. We propose to use the SOI on SOAR to monitor 7 Cepheids with variability (Delta) M>0.5 mag, some with unknown IR excess and with certain IR excess.

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