21 papers · 1 filter
Abundances of Planetary Nebulae NGC3242 and NGC6369
S. R. Pottasch, J. Bernard-Salas
The spectra of the planetary nebulae NGC3242 and NGC6369 are reanalysed using spectral measurements made in the mid-infrared with the Spitzer Space Telescope and the Infrared Space…
The Magellanic zoo: Mid-infrared Spitzer spectroscopy of evolved stars and circumstellar dust in the Magellanic Clouds
G. C. Sloan, K. E. Kraemer, P. R. Wood +4
We observed a sample of evolved stars in the Large and Small Magellanic Clouds (LMC and SMC) with the Infrared Spectrograph on the Spitzer Space Telescope. Comparing samples from t…
Abundances of Planetary Nebula NGC2392
S. R. Pottasch, J. Bernard-Salas, T. L. Roellig
The spectra of the planetary nebula NGC2392 is reanalysed using spectral measurements made in the mid-infrared with the Spitzer Space Telescope. The aim is to determine the chemica…
Blue Compact Dwarf Galaxies with Spitzer: The Infrared/Radio Properties
Yanling Wu, V. Charmandaris, J. R. Houck +4
We study the correlation between the radio, mid-infrared and far-infrared properties for a sample of 28 blue compact dwarf (BCD) and low metallicity star-forming galaxies observed…
Chemical composition and mixing in giant HII regions: NGC3603, 30Doradus, and N66
V. Lebouteiller, J. Bernard-Salas, B. Brandl +5
We investigate the chemical abundances of NGC3603 in the Milky Way, of 30Doradus in the Large Magellanic Cloud, and of N66 in the Small Magellanic Cloud. Mid-infrared observations…
Elemental Abundances of Blue Compact Dwarfs from mid-IR Spectroscopy with Spitzer
Yanling Wu, J. Bernard-Salas, V. Charmandaris +4
We present a study of elemental abundances in a sample of thirteen Blue Compact Dwarf (BCD) galaxies, using the 10--37m high resolution spectra obtained with Spitzer/IRS.…