| |
 |
| Paper: |
Cepheids - Toward a consensus? |
| Volume: |
11, Confrontation Between Stellar Pulsation and Evolution |
| Page: |
193 |
| Authors: |
Simon, Norman R. |
| Abstract: |
The observation of Cepheids in local and distant galaxies constitutes one of the three key projects approved for the Hubble Space Telescope in the first cycle. The objective is to determine the Hubble constant to an accuracy of + or - 10 percent. This paper examines how the understanding of galactic Cepheids affects this objective, and considers the progress that has been made in this area and some of the problems that still remain. The discussion covers the Cepheid period-luminosity relation; masses, radii, and luminosities; pulsating stars and radiative opacities; and pulsation modes, blue edges, and observed Cepheids. Finally, the hydrodynamic models are considered. |
|
|
|
|
|
