Open AccessStudy of variable stars in the MOA data base: long‐period red variables in the Large Magellanic Cloud – II. Multiplicity of the period–luminosity relation
Author(s) -
Noda S.,
Takeuti M.,
Abe F.,
Bond I. A.,
Dodd R. J.,
Hearnshaw J. B.,
Honda M.,
Honma M.,
Jugaku J.,
Kanya Y.,
Kato Y.,
Kilmartin P. M.,
Matsubara Y.,
Masuda K.,
Muraki Y.,
Nakamura T.,
Ohnishi K.,
Reid M.,
Rattenbury N. J.,
Saito To.,
Saito Y.,
Sato H.,
Sekiguchi M.,
Skuljan J.,
Sullivan D. J.,
Sumi T.,
Yamada R.,
Yanagisawa T.,
Yock P. C. M.,
Yoshizawa M.
Publication year - 2004
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2004.07413.x
Subject(s) - physics , astrophysics , stars , variable star , light curve , large magellanic cloud , astronomy , sky , luminosity , gravitational microlensing , multiplicity (mathematics) , galaxy , mathematical analysis , mathematics
Data for 4.4 million stars from the Microlensing Observations in Astrophysics (MOA) project are compared with the near‐infrared data of the Deep Near Infrared Southern Sky Survey (DENIS). More than 4000 stars observed in both projects show a quite periodic light curve. Among them, a number of stars are likely eclipsing variables, and the others seem to be pulsating stars. The K S magnitudes of these red variables are in the range 10–12.5 but a minor clump at K S ≈ 12.2 mag is also found. The multiplicity of the period–luminosity relation is confirmed, but most of the regular, large‐amplitude variables are found on the relation established for the Mira stars. We study the properties of the variables on the colour–magnitude diagram constructed with the MOA red band R m and K S of DENIS. Multiplicity of the period–luminosity relation is briefly discussed in relation to the excitation mechanism of red pulsating variables.