Physics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sptz.prop30088n&link_type=abstract
Spitzer Proposal ID #30088
Physics
Scientific paper
Bowshocks from runaway OB stars are perhaps some of the most spectacular objects discovered by IRAS. The strong winds from these young stars can sweep relatively large column densities of gas and dust. This material accumulates in a bowshock that develops as the star moves supersonically through their surrounding medium. The dust and gas within the bowshock is illuminated by the starlight, which copiously reradiates this energy at mid/far infrared wavelengths. The large extent of these objects across the sky (~1/2 - 1 degree) plus the diffuse nature of their emission has prevented any major progress in understanding their properties since IRAS. Spitzer's unique capability to map large regions of the sky, and the superb sensitivity of its spectrometer to obtain spectra of diffuse emission at a fraction of a MJy/str, will be used to study five prototypical runaway bowshocks. These observations will be used to measure their IR bolometric luminosity, the emission properties of the shocked excited gas, the reprocessing of dust by shocks, the development of dynamical instabilites, and to provide observational templates to understand similar new objects found in the GLIMPSE and MIPSGAL surveys of the Galactic plane.
Cantó Jorge
Carey Sean
Clancy Dominic
Noriega-Crespo Alberto
Raga Alejandro
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