409 citations · 926 across the 15 of their papers we have counts for
15 papers
Pre-main Sequence B Stars Surrounding the Orion Nebula
P. H. F. B. Braz, A. Roman-Lopes, W. J. B. Corradi +6
Pre-main sequence (PMS) early-type stars are rare due to their rapid evolution. Confirming PMS B stars is accordingly valuable for constraining higher mass star formation scenarios…
Chemical abundances in Seyfert galaxies X. Sulphur abundance estimates
O. L. Dors, M. Valerdi, R. A. Riffel +12
For the first time, the sulphur abundance relative to hydrogen (S/H) in the Narrow Line Regions of a sample of Seyfert 2 nuclei (Sy 2s) has been derived via direct estimation of th…
Chemical abundances in Seyfert galaxies -IX. Helium abundance estimates
O. L. Dors, M. Valerdi, P. Freitas-Lemes +7
For the first time, the helium abundance relative to hydrogen (He/H), which relied on direct measurements of the electron temperature, has been derived in the narrow line regions (…
GALExtin: An alternative online tool to determine the interstellar extinction in the Milky Way
Eduardo B. Amores, Ricardo M. Jesus, Andre Moitinho +6
Estimates of interstellar extinction are essential in a broad range of astronomical research. In the last decades, several maps and models of the large scale interstellar extinctio…
The VVV Near-IR Galaxy Catalogue beyond the Galactic disk
Laura D. Baravalle, M. Victoria Alonso, Dante Minniti +7
Knowledge about the large-scale distribution of galaxies is far from complete in the Zone of Avoidance, which is mostly due to high interstellar extinction and to source confusion…
The H line emission of the Be star Psc: the last 40 years
Ronaldo S. Levenhagen, Marcos P. Diaz, Eduardo B. Amôres +1
A study on the photosphere and disc of the Be star Psc is presented. We recover almost 40 years of high-resolution spectroscopic observations and additional data gathered from…