A New Cepheid Distance to the Maser-Host Galaxy NGC 4258 and Its Implications for the Hubble Constant

We present initial results from a time series BVI survey of two fields in NGC 4258 using the HST ACS. This galaxy was selected because of its accurate maser-based distance, which is anticipated to have a total uncertainty of 63%. The goal of the HST observations is to provide an absolute calibration...

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Veröffentlicht in:	The Astrophysical journal 2006-12, Vol.652 (2), p.1133-1149
Hauptverfasser:	Macri, L. M, Stanek, K. Z, Bersier, D, Greenhill, L. J, Reid, M. J
Format:	Artikel
Sprache:	eng
Schlagworte:	Astronomy Earth, ocean, space Exact sciences and technology
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