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|Title: ||The RR Lyrae distance scale from Near-Infrared photometry|
|Authors: ||Buonanno, Roberto|
|Issue Date: ||17-Feb-2006 |
|Abstract: ||The work carried out in this thesis is part of a long-term project aimed at measuring
accurate near-infrared magnitudes of RR Lyrae stars in a sample of Galactic globular clusters that
cover a wide metallicity range ( 2.3 [ / ] 1.3 Fe H − £ £ − ) and host a sizable population of RR Lyrae
stars ( 10 RR N ³ ).
In this thesis we will present the result obtained for the Galactic globular clusters M68 and
NGC3201, and for the Large Magellanic Cloud cluster Reticulum. The results for these clusters
are all based on the observations carried out with SOFI/NTT.
The data collected allowed us to provide accurate estimates of J, K mean magnitudes for a
large portion of the cluster RR Lyrae variables, and in turn to derive in a homogeneous context
the slope of the K-band Period-Luminosity relation (PLK). The slope of the observed PLK
relation agrees quite well with theoretical pulsational predictions. On the basis of this agreement
between our empirical PLK relations and the theoretical ...|
|Description: ||17. ciclo|
|Appears in Collections:||Tesi di dottorato in scienze matematiche e fisiche|
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