Cepheid period-luminosity relation from the AKARI observations

Chow Choong Ngeow, Yoshifusa Ita, Shashi M. Kanbur, Hilding Neilson, Takashi Onaka, Daisuke Kato

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

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 Infrared Camera sources were matched to the Optical Gravitational Lensing Experiment-III (OGLE-III) LMC Cepheid catalogue. Together with the available I-band light curves from the OGLE-III catalogue, 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 is 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, however there is an ~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.

Original languageEnglish
Pages (from-to)983-991
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume408
Issue number2
DOIs
Publication statusPublished - 2010 Oct

Keywords

  • Distance scale
  • Stars: variables: Cepheids

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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