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2012ApJ...747...50N - Astrophys. J., 747, 50 (2012/March-1)

On the application of Wesenheit function in deriving distance to galactic cepheids.

NGEOW C.-C.

Abstract (from CDS):

In this paper, we explore the possibility of using the Wesenheit function to derive individual distances to Galactic Cepheids, as the dispersion of the reddening-free Wesenheit function is smaller than the optical period-luminosity (P-L) relation. When compared to the distances from various methods, the averaged differences between our results and published distances range from -0.061 to 0.009, suggesting that the Wesenheit function can be used to derive individual Cepheid distances. We have also constructed Galactic P-L relations and selected Wesenheit functions based on the derived distances. A by-product from this work is the derivation of Large Magellanic Cloud distance modulus when calibrating the Wesenheit function. It is found to be 18.531±0.043 mag.

Abstract Copyright:

Journal keyword(s): distance scale - stars: variables: Cepheids

VizieR on-line data: <Available at CDS (J/ApJ/747/50): table1.dat>

Status in Simbad:  could be processed

Simbad objects: 398

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2019.12.11-01:10:27

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