Determination of the Distances and Masses of 3 Galactic Cepheids

Details Determination of the Distances and Masses of 3 Galactic Cepheids Determination of the Distances and Masses of 3 Galactic Cepheids

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9105m&link_type=abstract

HST Proposal ID #9105

Physics

Hst Proposal Id #9105 Cold Stars

Scientific paper

We propose to continue a successful observing strategy which enabled us to accurately measure angular separations < 10^-2'' with the FOC for binaries with Cepheid primaries and main sequence B or A star secondaries {our accuracy should improve to 10^-3'' with STIS}. Once measurements are available at two carefully selected phases and these are combined with spectroscopic orbits, the angular information will enable the masses and distances for the binaries to be determined from Newton's laws and Euclidean geometry. The distances determinations amount to bypassing two rungs of the cosmic distance ladder: the moving-cluster distance to the Hyades and main sequence fitting of clusters containing Cepheids. The mass determinations will provide the first direct dynamical mass measurements for Cepheids, providing sorely needed quantitative information on this poorly understood stage of massive star evolution.

Affiliated with

Also associated with

No associations

Rating

Determination of the Distances and Masses of 3 Galactic Cepheids 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 Distances and Masses of 3 Galactic Cepheids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of the Distances and Masses of 3 Galactic Cepheids will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1200521