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

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aspc..432..207h&link_type=abstract

New Horizons in Astronomy: Frank N. Bash Symposium 2009, proceedings of a conference held Oct. 18-20, 2009 in Austin, Texas, USA

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.

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