Cepheids and Long-period Variables in NGC 4258

Details Cepheids and Long-period Variables in NGC 4258 Cepheids and Long-period Variables in NGC 4258

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21541707h&link_type=abstract

American Astronomical Society, AAS Meeting #215, #417.07; Bulletin of the American Astronomical Society, Vol. 42, p.272

Astronomy and Astrophysics

Astronomy

Scientific paper

We present preliminary results of a survey for Cepheids and long-period variables in NGC 4258. This galaxy plays a key role in the Extragalactic Distance Scale due to its very precise and accurate maser-based distance. Our observations were obtained at the Gemini North Observatory in the gri bands over 22 epochs spanning 4 years.
We have discovered long-period Cepheids which we have used to extend the P-L relation in this galaxy beyond its previous limit of P<45 days. This will enable a more accurate calibration of the P-L relation in this important galaxy. Additionally, we have identified long-period variables and present their properties.
We acknowledge support by NASA through the following grants: HST-GO-09810, -10399, & -10802

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