Narowband H alpha imaging and long-slit optical and near-infrared spectroscopy are analyzed in a study of the starburst galaxy NGC 7714. The data indicate that...
The Structure and Star Formation History of NGC 5461
We compute photoionization models for the giant extragalactic H II region NGC 5461 and compare their predictions to several observational constraints. Since we...
The Structure and Star-Formation History of NGC 5461
We compute photoionization models for the giant extragalactic H II region NGC 5461, and compare their predictions to several observational constraints. The...
The T<SUB>e</SUB>[N II]-T<SUB>e</SUB>[O III] temperature relation in H II regions and the reliability of strong-line methods
We use a sample of 154 observations of 124 H II regions that have measurements of both T e[O III] and T e[N II], compiled from the literature, to explore the...
The Trapezium Stars. Preliminary Results on Detailed Atmosphere Modeling
A spectroscopic study of the Trapezium Cluster stars in the Orion Nebula is presented. We determine the stellar parameters of the two B0.5V stars theta(1}_{)...
The VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+)
The VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+) is surveying the southern Milky Way in u, g, r, i and Hα at ˜1 arcsec angular...
Three generations of stars: a possible case of triggered star formation
Evidence for triggered star formation linking three generations of stars is difficult to assemble, as it requires convincingly associating evolved massive stars...
Three supernova shells around a young M33 star cluster
Using a specialized technique sensitive to the presence of expanding ionized gas, we have detected a set of three concentric expanding shells in an H II region...
Two physical regimes for the giant H II regions and giant molecular clouds in the Antennae galaxies
We have combined observations of the Antennae galaxies from the radio interferometer ALMA (Atacama Large Millimeter/submillimeter Array) and from the optical...