Cepheid Period-Luminosity Relation from the AKARI Observations
Abstract
In this paper, we derive the period-luminosity (P-L) relation for Large Magellanic Cloud (LMC) Cepheids based on mid-infrared AKARI observations. AKARI's IRC sources were matched to the OGLE-III LMC Cepheid catalog. Together with the available I band light curves from the OGLE-III catalog, potential false matches were removed from the sample. This procedure excluded most of the sources in the S7 and S11 bands: hence only the P-L relation in the N3 band was derived in this paper. Random-phase corrections were included in deriving the P-L relation for the single epoch AKARI data, even though the derived P-L relation is consistent with the P-L relation without random-phase correction, though there is a \sim 7 per-cent improvement in the dispersion of the P-L relation. The final adopted N3 band P-L relation is N3 = -3.246 log(P) + 15.844, with a dispersion of 0.149.
Cite
@article{arxiv.1006.1553,
title = {Cepheid Period-Luminosity Relation from the AKARI Observations},
author = {Chow-Choong Ngeow and Yoshifusa Ita and Shashi M. Kanbur and Hilding Neilson and Takashi Onaka and Daisuke Kato},
journal= {arXiv preprint arXiv:1006.1553},
year = {2015}
}
Comments
10 pages, 11 figures and 5 tables. MNRAS accepted