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Ionized molecules trace galactic outflows

Dragon
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Ionized molecules trace galactic outflows Empty Ionized molecules trace galactic outflows

Post by Dragon Tue Mar 27, 2018 1:19 pm

There is a process at work in most galaxies that affects both the central black hole mass as well as the galaxy's global velocity structure and luminosity. Astronomers suspect that feedback of some kind is involved, and one popular mechanism is outflowing gas. The outflow would deplete a galaxy of the raw material needed both for making new stars and for enhancing the black hole's mass.

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Post by Dragon Tue Mar 27, 2018 1:21 pm

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Credit: NASA, ESA, the Hubble Heritage Team STScI/AURA-ESA/Hubble Collaboration, and A. Evans University of Virginia, Charlottesville/NRAO/Stony Brook University

The galaxy Markarian 231, the nearest quasar to Earth, as seen by the Hubble Space Telescope. The galaxy is the product of a merger between two galaxies. Astronomers have discovered the signatures of the ionized molecules OH+ and H2O+ in its massive outflow and argue that shock-induced cosmic rays are responsible for their ionization.

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Post by Dragon Tue Mar 27, 2018 1:22 pm



The Atacama Large Millimeter/submillimeter Array (ALMA) have observed massive molecular gas outflows ejected by the Sculptor Galaxy (NGC 253). This may explain how starburst galaxies behave and why there is a scarcity of very massive galaxies in the Universe.

 
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Post by Dragon Tue Mar 27, 2018 1:23 pm



A simulation of magnetic field outflows from active galactic nuclei.



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