Direct calibration of the Cepheid period-luminosity relation

Details Direct calibration of the Cepheid period-luminosity relation Direct calibration of the Cepheid period-luminosity relation

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.308..969l&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 308, Issue 4, pp. 969-978.

Astronomy and Astrophysics

Astronomy

30

Scientific paper

After the first release of Hipparcos data, Feast & Catchpole gave a new value for 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 is of crucial importance. We therefore conclude that the choice of the best weighting system can be aided by a Monte Carlo simulation. On the basis of such a simulation, it is shown that (i) a cut-off in π or in σ_ππ introduces a strong bias; (ii) the zero-point is more stable when only the brightest Cepheids are used; and (iii) the Feast & Catchpole weighting gives the best zero-point and the lowest dispersion. After correction, the adopted visual period-luminosity relation is =-2.77logP-1.44+/-0.05. Moreover, we extend this study to the photometric I band (Cousins) and obtain =-3.05logP-1.81+/-0.09.

Affiliated with

Also associated with

No associations

Rating

Direct calibration of the Cepheid period-luminosity relation 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 Direct calibration of the Cepheid period-luminosity relation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct calibration of the Cepheid period-luminosity relation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1826204