The calibration of the distance scale using Cepheid Period Luminosity relations at maximum light

Details The calibration of the distance scale using Cepheid Period Luminosity relations at maximum light The calibration of the distance scale using Cepheid Period Luminosity relations at maximum light

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000hst..prop.8752k&link_type=abstract

HST Proposal ID #8752

Other

Hst Proposal Id #8752 Cosmology

Scientific paper

This proposal aims to use existing HST Cepheid data to formulate Cepheid Period Luminosity {PL} relations at maximum light and so recalibrate the extra-galactic distance scale and estimate Hubble's constant. PL relations at maximum light are distinct from those at mean light because the physical conditions in the Cepheid envelope at maximum light are very different to conditions at all other pulsation phases. In particular, at maximum light the photospheric temperature is 6200K+/- 200K, independent of period. Current uncertainties on the distance scale amount to about 0.15 mags or about a seven percent error in distance. Hence the results of our proposal will be a check on the existing Cepheid distance scale. Further the use of such maximum light PL relations may increase the accuracy of the distance scale because the different envelope conditions at maximum light imply a smaller dispersion at given period than mean light relations, a flat slope to the period color relation at maximum light and a way to check reddening determinations. We will also use the HST Cepheid data to make a detailed comparison of light curves with their local counterparts to test if they are indeed from the same population.

Affiliated with

Also associated with

No associations

Rating

The calibration of the distance scale using Cepheid Period Luminosity relations at maximum light 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 The calibration of the distance scale using Cepheid Period Luminosity relations at maximum light, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The calibration of the distance scale using Cepheid Period Luminosity relations at maximum light will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1720461