30 citations · 104 across the 7 of their papers we have counts for
7 papers
Comparing the spatial and kinematic distribution of gas and young stars around the shell-like structure in the CMa OB1 association
Jane Gregorio-Hetem, Bertrand Lefloch, Annibal Hetem +4
The relationship between young stellar clusters and respective parental molecular clouds is still an open issue: for instance, are the similarities between substructures of clouds…
Searching for active low-mass stars in CMa star-forming region: multi-band photometry with T80S
J. Gregorio-Hetem, F. Navarete, A. Hetem +10
An exotic environment surrounds the young stellar groups associated with the Canis Major (CMa) OB1/R1 region, which probably was formed under feedback from at least three supernova…
Statistical fractal analysis of 25 young star clusters
J. Gregorio-Hetem, A. Hetem, T. Santos-Silva +1
A large sample of young stellar groups is analysed aiming to investigate their clustering properties and dynamical evolution. A comparison of the Q statistical parameter, measured…
Probing the anomalous extinction of four young star clusters: the use of colour-excess, main sequence fitting and fractal analysis
B. Fernandes, J. Gregorio-Hetem, A. Hetem
Four young star clusters were studied in order to characterize their anomalous extinction or variable reddening that could be due to a possible contamination by dense clouds or cir…
Distinguishing post-AGB impostors in a sample of pre-main sequence stars
Rodrigo G. Vieira, Jane Gregorio-Hetem, Annibal Hetem +2
A sample of 27 sources, catalogued as pre-main sequence stars by the Pico dos Dias Survey (PDS), is analyzed to investigate a possible contamination by post-AGB stars. The far-infr…
The use of genetic algorithm to model protoplanetary discs
A. Hetem, J. Gregorio-Hetem
The protoplanetary discs of T Tauri and Herbig Ae/Be stars have been studied by using geometric disc models to fit their spectral energy distribution (SED). The simulations provide…