HST Observations of Cepheids in M81: Dealing with Extinction

Session 6 -- Normal Galaxies: Structure and Dynamics
Display presentation, Monday, 9:20-6:30, Pauley Room

[6.03] HST Observations of Cepheids in M81: Dealing with Extinction

B.F. Madore (NED/IPAC/JPL/CIT), W.L. Freedman, M.G. Lee, R. Hill (OCIW), R.C. Kennicutt, A. Turner (U. Ariz.), J. Mould, S. Hughes (CIT), P. Stetson (DAO), H. Ford, L. Ferrarese (JHU), J.G. Hoessel (U. Wisc.), G.D. Illingworth, S. Faber (UCSC), J. Huchra (Harvard/CfA), J.A. Graham (CIW), A. Saha (STScI), J. Gunn (Princeton)

Using (V,I) CCD imaging data centered on two Cepheid fields in the nearby galaxy M81, as obtained by the Extragalactic Distance Scale Key Project Team using the Hubble Space Telescope Wide-Field Camera, we show the complex dust structure now evident in this galaxy. The methodology being used by our Team in dealing with this extinction in applying the Cepheid period-luminosity relation to determine true distances will be outlined.

Monday program listing