On improved Cepheid distance estimators
| dc.creator | Kanbur, Shashi M. | |
| dc.creator | Hendry, Martin A. | |
| dc.date | 1995-04-11 | |
| dc.date.accessioned | 2026-07-07T02:19:44Z | |
| dc.date.available | 2026-07-07T02:19:44Z | |
| dc.description | In this paper, we derive a physical argument for the existence of Period-luminosity and period-luminosity-colour relations at maximum light. We examine in detail a sample of Cepheids in the Large Magellanic Cloud, and compare the variance of some PL and PLC type distance indicators based on mean and maximum light. We show that a PLC relation based on maximum light leads to a distance estimator with a dispersion about $10 \%$ smaller than its counterpart using mean light. We also show that a PLC type relation constructed using observations at both maximum and mean light has a significantly $( > 50 \%)$ smaller dispersion than a PLC relation using either maximum or mean light alone. A comparable $( > 30 \%)$ reduction in the dispersion of the corresponding distance estimator, however, in this case requires the relation be applied to a large $( n > 30)$ group of equidistant Cepheids in, e.g., a distant galaxy. Recent HST observations of IC4182, M81 and M100 already provide suitable candidate data sets for this relation. | |
| dc.description | Plain Latex version 3.141, 25 pages including figures and tables. (Requires style file laa.sty) Astronomy and Astrophysics in press | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9504033 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9504033 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/9983 | |
| dc.subject | Astrophysics | |
| dc.title | On improved Cepheid distance estimators | |
| dc.type | text |