HST Observations of the Starburst-ISM Interaction in NGC 1569

Details HST Observations of the Starburst-ISM Interaction in NGC 1569 HST Observations of the Starburst-ISM Interaction in NGC 1569

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.7814s&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #78.14; Bulletin of the American Astronomical Society, Vol. 32, p.1531

Astronomy and Astrophysics

Astronomy

2

Scientific paper

We present narrowband HST imagery of the dwarf irregular starburst galaxy NGC 1569. The combination of this galaxy's proximity and the high spatial resolution of HST/WFPC2 provides us with an unprecedented look at the complex ionized gas distribution prevalent in such low-mass starburst systems. Following a recent successful search for massive Wolf-Rayet stars using these data, we now present a detailed study of the ionized gas morphology and excitation, using narrowband imagery at Hα , [OIII], and [SII] wavelengths. We also have obtained an image in the light of Hβ , with which we have measured and removed the effects of extinction in the observations. These data, in combination with ground-based slit spectra, radio maps of the cold gas component, and X-ray maps of the hot gas component, are allowing us to build a detailed picture of the interaction between the super star clusters of the starburst and the gaseous ISM. We present a number of results, including our confirmation of a fairly well-mixed ISM, some evidence for dust-depletion in regions near the starburst, and arguments for photoionization as the primary energizing mechanism for the ISM. Support for this work was provided by NASA through grant number GO-08133.01-97A from the Space Telescope Science Institute.

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