Near-Infrared photometry of LMC cluster Reticulum

Bibcode
2004MmSAI..75..138D
Dall'Ora, M.; Bono, G.; Storm, J.; Testa, V.; Andreuzzi, G.; Buonanno, R.; Caputo, F.; Castellani, V.; Corsi, C. E.; Degl'Innocenti, S.; Marconi, G.; Marconi, M.; Monelli, M.; Ripepi, V.
Bibliographical reference

Memorie della Società Astronomica Italiana, v.75, p.138 (2004)

Advertised on:
0
2004
Number of authors
14
IAC number of authors
0
Citations
4
Refereed citations
4
Description
We 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 (PLZK) 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. mu = 18.47 ± 0.07 mag.
Type
Non-refereed
Variable stars

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