212 citations · 595 across the 13 of their papers we have counts for
33 papers · 1 filter
Abundances in the Galactic bulge: results from planetary nebulae and giant stars
C. Chiappini, S. Gorny, G. Stasinska +1
Our understanding of the chemical evolution of the Galactic bulge requires the determination of abundances in large samples of giant stars and planetary nebulae (PNe). We discuss P…
The ionizing radiation from massive stars and its impact on HII regions: results from modern model atmospheres
S. Simón-Díaz, G. Stasińska
We present a detailed comparison of the ionizing spectral energy distributions (SEDs) predicted by four modern stellar atmosphere codes, TLUSTY, CMFGEN, WMbasic, and FASTWIND. We c…
The chemical composition of planetary nebulae and HII regions in NGC 3109
Miriam Pena, Grazyna Stasinska, Michael Richer
We present deep spectrophotometry for a sample of 8 PNe and 12 HII regions in the irregular galaxy NGC 3109, to analyze the chemical composition of both types of nebulae. We presen…
Planetary nebulae, tracers of stellar nucleosynthesis
Grazyna Stasinska
We review the information that planetary nebulae and their immediate progenitors, the post-AGB objects, can provide to probe the nucleosynthesis and mixing in low and intermediate…
An evolutionary catalogue of Galactic post-AGB and related objects
R. Szczerba, N. Siodmiak, G. Stasinska +1
With the ongoing AKARI infrared sky survey, of much greater sensitivity than IRAS, a wealth of post-AGB objects may be discovered. It is thus time to organize our present knowledge…
The primordial abundance of 4He: a self-consistent empirical analysis of systematic effects in a large sample of low-metallicity HII regions
Y. I. Izotov, T. X. Thuan, G. Stasinska
We determine the primordial helium mass fraction Yp using 93 spectra of 86 low-metallicity extragalactic HII regions. This sample constitutes the largest and most homogeneous high-…