Physics
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9043t&link_type=abstract
HST Proposal ID #9043
Physics
Hst Proposal Id #9043 Cosmology
Scientific paper
-.07in The HST Key Project on the Extragalactic Distance Scale and the HST project on the ``Calibration of Nearby Type Ia Supernovae'' have greatly improved our knowledge of the Hubble Constant by providing a solid zero point for the Tully- Fisher {TF} relation and Type Ia Supernovae {SNIa}. However, severe inconsistencies remain for distance estimators to early-type galaxies such as surface brightness fluctuations {SBF}, the planetary nebula luminosity function {PNLF}, the fundamental plane {FP}, and the globular cluster luminosity function {GCLF}. As a result, the distance to the Virgo cluster core remains uncertain by as much as 20 determination is directly affected by a lingering 0.1 mag {5 uncertainty in the photometric calibration of the WFPC2. Resolving these issues is essential not only to firm up the extragalactic distance scale, but also to understand the mass and velocity structure of the local universe. SBF in particular is emerging as the method of choice for mapping local velocity fields to 10, 000 kms because it offers an order of magnitude less Malmquist bias than TF, and SNIa are too rare to study large scale flows effectively. This project will tighten the photometric calibration of the WFPC2, and provide a solid Cepheid calibration for SBF and PNLF.
No associations
LandOfFree
Cepheid Distances to Early-type Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cepheid Distances to Early-type Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cepheid Distances to Early-type Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1200416