18 citations · 36 across the 9 of their papers we have counts for
9 papers
Automatic Observation Rendering (AMORE) I. On a synthetic stellar population's colour-magnitude diagram
Y. K. Ng, E. Brogt, C. Chiosi +1
A new method, AMORE - based on a genetic algorithm optimizer, is presented for the automated study of colour-magnitude diagrams. The method combines several stellar population synt…
Stellar population synthesis diagnostics
Y. K. Ng
A quantitative method is presented to compare observed and synthetic colour-magnitude diagrams (CMDs). The method is based on a chi^2 merit function for a point (c_i,m_i) in the ob…
The galactic disc age-metallicity relation
Y. K. Ng, G. Bertelli, G. Carraro +1
New ages are computed for stars in the Solar Neighbourhood from the Edvardsson et al. (1993) data set. Distances derived from the Hipparcos parallaxes were adopted to obtain reliab…
Revised ages for the stars in the solar neighbourhood
Y. K. Ng, G. Bertelli
New ages are computed for the stars from the Edvardsson et al. (1993) data set. The revised values are systematically larger toward older ages (t>4 Gyr), while they are slightly lo…
Probing the Galaxy I. The galactic structure towards the galactic pole
Y. K. Ng, G. Bertelli, C. Chiosi +1
Observations of (B-V) colour distributions towards the galactic poles are compared with those obtained from synthetic colour-magnitude diagrams to determine the major constituents…
Field #3 of the Palomar-Groningen Survey I. Variable stars at the edge of the Sagittarius dwarf galaxy
Y. K. Ng, M. Schultheis
A catalogue is presented with variable (RR Lyrae, semiregular and Mira) stars located inside field #3 of the Palomar-Groningen Survey, at the outer edge of the Sagittarius dwarf ga…