Publications (15)
Initial mass function effects on the colour evolution of disk galaxies
P. Westera, M. Samland, S. J. Kautsch +2
In this work, we want to find out if the IMF can be determined from colour images, integrated colours, or mass-to-light ratios, especially at high redshift, where galaxies cannot b…
Model atmosphere calibration for synthetic photometry applications: the uvby Stromgren photometric system
T. Lejeune, E. Lastennet, P. Westera +1
In view of the importance of accurate fundamental stellar parameters for `Spectro-photometric dating of stars and galaxies", we present simultaneous effective temperature and metal…
The VISCACHA survey XIV. Chemical evolution history of the SMC: The Southern Bridge Clusters
Sasi Saroon, B. Dias, T. Tsujimotto +18
The chemical evolution history of the Small Magellanic Cloud (SMC) is complex and is best understood through a comprehensive analysis of star clusters across its various regions. T…
Stellar Populations in HII Galaxies
P. Westera, F. Cuisinier, E. Telles +1
We analyse the stellar content of a large number of HII galaxies from the continua and absorption features of their spectra using population synthesis methods, in order to gain inf…
The VISCACHA survey -- IX. The SMC Southern Bridge in 8D
M. C. Parisi, R. A. P. Oliveira, M. Angelo +16
The structure of the Small Magellanic Cloud (SMC) outside of its main body is characterised by tidal branches resulting from its interactions mainly with the Large Magellanic Cloud…
A standard stellar library for evolutionary synthesis. III. Metallicity calibration
P. Westera, T. Lejeune, R. Buser +2
We extend the colour calibration of the widely used BaSeL standard stellar library (Lejeune, Cuisinier, & Buser 1997, 1998) to non-solar metallicities, down to [Fe/H] ~ -2.0 dex. S…
Metallicity-dependent effective temperature determination for eclipsing binaries from synthetic uvby Stromgren photometry
E. Lastennet, T. Lejeune, P. Westera +1
Stromgren synthetic photometry from an empirically calibrated grid of stellar atmosphere models has been used to derive the effective temperature of each component of double lined…
The VISCACHA survey -- VIII. Chemical evolution history of Small Magellanic Cloud West Halo cluster
S. Saroon, B. Dias, T. Tsujimotto +12
The chemical evolution history of the Small Magellanic Cloud (SMC) has been a matter of debate for decades. The challenges in understanding the SMC chemical evolution are related t…
The Southern Photometric Local Universe Survey (S-PLUS): improved SEDs, morphologies and redshifts with 12 optical filters
C. Mendes de Oliveira, T. Ribeiro, W. Schoenell +142
The Southern Photometric Local Universe Survey (S-PLUS) is imaging ~9300 deg^2 of the celestial sphere in twelve optical bands using a dedicated 0.8 m robotic telescope, the T80-So…
BaSeL: a library of synthetic spectra and colours for GAIA
E. Lastennet, T. Lejeune, E. Oblak +2
The BaseL Stellar Library (BaSeL) is a library of synthetic spectra which has already been used in various astrophysical applications (stellar clusters studies, characterization an…
The VISCACHA survey -- II. Structure of star clusters in the Magellanic Clouds periphery
J. F. C. Santos, F. F. S. Maia, B. Dias +11
We provide a homogeneous set of structural parameters of 83 star clusters located at the periphery of the Small Magellanic Cloud (SMC) and the Large Magellanic Cloud (LMC). The clu…
Simultaneous solutions of stellar parameters (Teff, [Fe/H]) from synthetic uvby Stromgren photometry
E. Lastennet, T. Lejeune, P. Westera +1
The comprehensive knowledge of fundamental parameters of single stars is the basis of the modelling of star clusters and galaxies. Most fundamental stellar parameters of the indivi…
The VISCACHA survey -- III. Star clusters counterpart of the Magellanic Bridge and Counter-Bridge in 8D
B. Dias, M. S. Angelo, R. A. P. Oliveira +15
Context. The interactions between the SMC and LMC created the Magellanic Bridge, a stream of gas and stars pulled out of the SMC towards the LMC about 150 Myr ago. The tidal counte…
On the geometrical evolution of the ionized gas in HII galaxies
F. Cuisinier, P. Westera, E. Telles +1
In this paper, we investigate the behaviour of the number of Lyman continuum ionizing photons as compared to the actual number of hydrogen recombinations in HII galaxies. We evalua…
Metallicity calibration of theoretical stellar SEDs using UBVRIJHKL photometry of globular clusters
P. Westera, Th. Lejeune, R. Buser
Although stellar SED models are constantly improving and seem to show similar differential tendencies as measured spectra, their absolute properties (eg. absolute flux in different…