Direct Calibration of the Cepheid Period-Luminosity relation (Based on data from the ESA HIPPARCOS astrometry satellite)
| dc.creator | Lanoix, P. | |
| dc.creator | Paturel, G. | |
| dc.creator | Garnier, R. | |
| dc.date | 1999-04-22 | |
| dc.date.accessioned | 2026-07-07T02:31:20Z | |
| dc.date.available | 2026-07-07T02:31:20Z | |
| dc.description | After the first release of HIPPARCOS data, Feast & Catchpole gave a new value to the zero-point of the visual Cepheid Period-Luminosity relation based on trigonometric parallaxes. Because of the large uncertainties on these parallaxes, the way in which individual measurements are weighted bears a crucial importance, and the discrepancy they show leads to the conclusion that the choice of the best weighting system can be provided through a Monte-Carlo simulation. On the basis of such a simulation it is shown that: - A cut in πor in σ_π / πintroduces a strong bias. - The zero-point is more stable when only the brightest Cepheids are used. - The Feast & Catchpole weighting gives the best zero-point and the lowest dispersion. After correction, the adopted visual Period-Luminosity relation is: <M_V> = -2.77 log P - 1.44 \pm 0.05. Moreover, we extend this study to the photometric I-band (Cousins) and obtain: <M_I> = -3.05 log P - 1.81 \pm 0.09. | |
| dc.description | 12 pages, 13 figures, accepted to MNRAS | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9904298 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9904298 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14119 | |
| dc.subject | Astrophysics | |
| dc.title | Direct Calibration of the Cepheid Period-Luminosity relation (Based on data from the ESA HIPPARCOS astrometry satellite) | |
| dc.type | text |