Percival, Susan M., Salaris, Maurizio
In this paper we investigate a hitherto unexplored source of potentially significant error in stellar population synthesis (SPS) models, caused by systematic uncertainties associated with the three...
Carter, David, Smith, Daniel J. B., Percival, Susan M., Baldry, Ivan K., Collins, Christopher A., James, Philip A., ...
We present a comprehensive analysis of the ability of current stellar population models to reproduce the optical (ugriz) and near infra-red (JHK) colours of a small sample of well-studied nearby...
Percival, Susan M., Salaris, Maurizio, Cassisi, Santi, Pietrinferni, Adriano
This paper is the 4th in a series describing the latest additions to the BaSTI stellar evolution database, which consists of a large set of homogeneous models and tools for population synthesis...
The age of the oldest Open Clusters (2003)
Salaris, Maurizio, Weiss, Achim, Percival, Susan M.
We determine ages of 71 old Open Clusters by a two-step method: we use main-squence fitting to 10 selected clusters, in order to obtain their distances, and derive their ages from comparison with our...
Percival, Susan M., Salaris, Maurizio
The mean absolute magnitude of the local red clump (RC) is a very well determined quantity due to the availability of accurate HIPPARCOS parallaxes for several hundred RC stars, potentially allowing...
The Open Cluster Distance Scale: A New Empirical Approach (2003)
Percival, Susan M., Salaris, Maurizio, Kilkenny, David
We present new BVRI photometry for a sample of 54 local G and K stars with accurate Hipparcos parallaxes in the metallicity range -0.4 < [Fe/H] < +0.3. We use this sample to develop a completely...
Calibration of the Red Clump distance scale and its application to the LMC / (2003)
Thesis (Ph.D.)--Liverpool John Moores University, 2003.
Resolving the 47 Tucanae Distance Problem (2002)
Percival, Susan M., Salaris, Maurizio, Van Wyk, Francois, Kilkenny, David
Using a sample of 43 suitable local subdwarfs with newly acquired BVI photometry, we apply our main sequence fitting method to the metal rich Globular Cluster 47 Tucanae. Fitting in 2 colour planes,...
Resolving the 47 Tucanae Distance Problem (2002)
Percival, Susan M., Salaris, Maurizio, Van Wyk, Francois, Kilkenny, David
We present new B, V and I-band photometry for a sample of 43 local subdwarfs with HIPPARCOS parallax errors < 13%, in the metallicity range -1.0 < [Fe/H] < -0.3, which we use to perform main sequence...