Determination of the Extragalactic Distance Scale.

Details Determination of the Extragalactic Distance Scale. Determination of the Extragalactic Distance Scale.

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6431m&link_type=abstract

HST Proposal ID #6431

Astronomy and Astrophysics

Astrophysics

Hst Proposal Id #6431 Cosmology

Scientific paper

Many fundamental problems in cosmology and astrophysics remain unsettled because the value of the expansion rate is uncertain to a factor of two. The refurbished HST has provided the opportunity to break this impasse. We propose to complete a program, which in combination with other GTO and GO work should lead to a measurement of H_0 to 10 Our main goal is the observation of Cepheids in 19 fields in 18 nearby galaxies, for the purpose of calibrating the best secondary distance indicators, including the infrared Tully-Fisher relation, the Planetary Nebula Luminosity Function, the Surface Brightness Fluctuation method, the type Ia supernovae standard candle and the type II supernova Expanding Photosphere Method. From Cycle 4 observations we have inferred H_0 = 80 +/- 17 km/sec/Mpc. Other groups have adopted the same strategy in part, and one has obtained a significantly lower value of H_0 supported by HST observations of supernova host galaxies. In this proposal we show how these claims can be resolved with Cycle 6 data to attain an unequivocable result from the Key Project. Measurement of Cepheids in the Virgo and Fornax clusters receives strong emphasis in this final cycle. Unique features of this proposal include an end-to-end approach to the extragalactic distance scale, and a careful error budget for the Key Project.

Affiliated with

Also associated with

No associations

Rating

Determination of the Extragalactic Distance Scale. 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 Determination of the Extragalactic Distance Scale., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of the Extragalactic Distance Scale. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1117638