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A New Superwind Wolf-Rayet Galaxy Mrk 1259

Y. Ohyama·Y. Taniguchi·R. Terlevich
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Abstract

We report the discovery of a starburst-driven wind (superwind) from the starburst nucleus galaxy Mrk 1259. The estimated number ratio of Wolf-Rayet (WR) to O stars amounts to ~0.09. While the nuclear emission-line region is due to usual photoionization by massive stars, the circumnuclear emission-line regions show anomalous line ratios that can be due to cooling shocks. Since the host galaxy seems to be a face-on disk galaxy and the excitation conditions of the circumnuclear emission-line regions show the spatial symmetry, we consider that we are seeing the superwind nearly from a pole-on view. Cooling shock models may explain the observed emission line ratios of the circumnuclear regions although a factor of 2 overabundance of nitrogen is necessary. All these suggest that the high-mass enhanced starburst occurred ~5X10^6 years ago in the nuclear region of Mrk 1259.

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Y. Ohyama, Y. Taniguchi, R. Terlevich. 1997-02-13. A New Superwind Wolf-Rayet Galaxy Mrk 1259. https://doi.org/10.1086/310615

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