we wish to produce a database for the comparison of the embedded population of massive stars in the large magellanic cloud and its well studied emerged population of ob stars. this comparison has direct implications on diverse problems related to early evolution of massive stars and their parental gas, the lifetime of ultracompact hii regions and their confining mechanisms, the buildup of the upper end of the main sequence, and the regulation of large scale star formation in molecular clouds. the sensitivity of isocam allows imaging of all the ultracompact hii regions detected by iras in the large magellanic cloud within a relatively short observing time. moreover, the ten-fold increase in spatial resolution permits addressing other questions, such as the morphology and the clustering of these objects, which were beyond the capabilities of iras data. finally, we wish to explore new color-color criteria for automated selection of ultracompact hii regions, more suitable to data obtained by ground-based telescopes in the future. a critical aspect in this respect is the analysis of the capability of these color-color criteria to produce both uncontaminated and complete samples, useful for statistical studies of the embedded massive stellar population in ours and nearby galaxies.
Instrument
CAM01
Temporal Coverage
1997-07-30T14:17:44Z/1997-09-13T07:33:55Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the world's first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
European Space Agency, 1999, Ultracompact Hii Regions In The Large Magellanic Cloud Part 1, 1.0, European Space Agency, https://doi.org/10.5270/esa-g8mhpzx
