An HST/NICMOS view of the prototypical giant HII region NGC604 in M33

Details An HST/NICMOS view of the prototypical giant HII region NGC604 in M33 An HST/NICMOS view of the prototypical giant HII region NGC604 in M33

2009-07-09

arxiv.org/abs/0907.1419v1

Astrophys.Space Sci.324:309-313,2009

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

Paper presented in the Workshop "Young massive star clusters: initial conditions and environments" (Granada, Spain - Sept 2007

Scientific paper

10.1007/s10509-009-0104-9

We present the first high-spatial resolution near-infrared (NIR) imaging of NGC 604, obtained with the NICMOS camera aboard the Hubble Space Telescope (HST). These NICMOS broadband images reveal new NIR point sources, clusters, and diffuse structures. We found an excellent spatial correlation between the 8.4 GHz radio continuum and the 2.2mu-m nebular emission. Moreover, massive young stellar object candidates appear aligned with these radio peaks, reinforcing the idea that those areas are star-forming regions. Three different scaled OB associations are recognized in the NICMOS images. The brightest NIR sources in our images have properties that suggest that they are red supergiant stars, of which one of them was previously known. This preliminary analysis of the NICMOS images shows the complexity of the stellar content of the NGC 604 nebula.

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