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28 March 2024
 
  » arxiv » astro-ph/0305276

 Article overview


Near-Infrared photometry of LMC cluster Reticulum
M. Dall’Ora ; G. Bono ; J. Storm ; V. Testa ; G. Andreuzzi ; R. Buonanno ; F. Caputo ; V. Castellani ; C.E. Corsi ; S. Degl’Innocenti ; G. Marconi ; M. Marconi ; M. Monelli ; V. Ripepi ;
Date 15 May 2003
Subject astro-ph
AbstractWe present near-infrared (JKs) time series data of the Large Magellanic Cloud (LMC) cluster Reticulum. The observing strategy and data reduction (DAOPHOTII/ALLFRAME) allowed us to reach a photometry accuracy of the order of 0.02 mag at limiting magnitudes typical of RR Lyrae stars. We are interested in Reticulum, since it hosts a sizable sample of RR Lyrae (32), and therefore the use of the K-band Period-Luminosity-Metallicity (PLZ_K) relation will allow us to supply an accurate LMC distance evaluation. The main advantages in using this method is that it is marginally affected by off-ZAHB evolutionary effects and by reddening corrections. As a preliminary but robust result we find a true distance in good agreement with the LMC Cepheid distance scale, i.e. DM = 18.47 +- 0.07 mag.
Source arXiv, astro-ph/0305276
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