Starburst in the interacting HII galaxy II Zw 40 and in non-interacting HII galaxies

Details Starburst in the interacting HII galaxy II Zw 40 and in non-interacting HII galaxies Starburst in the interacting HII galaxy II Zw 40 and in non-interacting HII galaxies

2009-08-20

arxiv.org/abs/0908.2966v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

4 pages, 1 figure, To appear in the Proceedings of the Galaxy Wars: Stellar Populations and Star Formation in Interacting Gala

Scientific paper

I summarize the results of our integral field spectroscopic observations of the nearby prototype of HII galaxies, II Zw 40. Observations with GMOS-IFU on GEMINI-North in the optical allowed us to make a detailed kinematic picture of the central starburst, while SINFONI with adaptive optics on the ESO-VLT gave us a near-IR view of the interplay between the ISM phases. Here, I also address the question that not all starbursts require an external trigger such as a galaxy-galaxy encounter, as it seems to be the case for a fraction of low luminosity HII galaxies. We speculate that these may form stars spontaneously like "pop-corn in a pan".

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