Bias in the Cepheid Period-Luminosity Relation

Details Bias in the Cepheid Period-Luminosity Relation Bias in the Cepheid Period-Luminosity Relation

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...517..188l&link_type=abstract

The Astrophysical Journal, Volume 517, Issue 1, pp. 188-192.

Astronomy and Astrophysics

Astronomy

14

Stars: Variables: Cepheids, Cosmology: Distance Scale

Scientific paper

We show that the Cepheid period-luminosity (PL) relation is affected by a Malmquist-type bias, the so-called population incompleteness bias. Its calculated slope appears shallower than the true one because of the cutoff in apparent magnitude resulting from the instrumental limiting magnitude. Furthermore, the use of the PL relation, even with the correct slope, leads to an underestimation of distances that is not negligible. We confirm this finding by studying simulated PL relations, and we show that this bias may be as large as 0.2 or 0.3 mag on distance modulus. We also test the efficiency of a cutoff in log P and show that it is a good way to minimize this bias. However, a correction of this is difficult as long as the completeness of the sample is not perfectly well established.

Affiliated with

Also associated with

No associations

Rating

Bias in 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 Bias in the Cepheid Period-Luminosity Relation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bias in the Cepheid Period-Luminosity Relation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1124136