Starship Asterisk*

APOD Robot wrote:
Research into the nature of the NGC 3079 superbubbles will surely continue, as well as searches for high-energy superbubbles in other galaxies.

solstation.com wrote:
On May 29, 2012, astronomers using the Fermi Gamma-ray Space Telescope (FGST, formerly named GLAST) announced the detection of giant gamma-ray jets emanating from the galactic core above and below the Milky Way's galactic center and extending some 27,000 light-years through the central bulge.
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The astronomers believe that the faint jets are a ghostly "after-image" of much brighter beams produced by a much more active, galactic nucleus around a million years ago. These jets likely were produced when plasma squirted out from the supermassive black hole at the galactic center after it consumed a molecular cloud and stars totalling roughly around 10,000 Solar-masses, and they followed "a corkscrew-like magnetic field that kept it tightly focused."

solstation.com wrote:
On January 3, 2013, astronomers working with the CSIROs 64-m Parkes radio telescope announced the detection of two giant bi-polar, supersonic outflows of charged particles, which emerge from the center of our Galaxy as linearly polarized, radio lobes (with "three ridge-like substructures") and stretch more than halfway across the sky. The flows extend for roughly 50,000 light-years in both directions outwards from the galactic plane at the core.
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nstead being created by quasar-like outbursts from the supermassive black hole at the Galactic Core, the radio observations appear to confirm that the outflows are driven by many generations of new stars forming and exploding as supernovae in the Galactic Core over the last hundred million years, along with their magnetic fields (CSIRO news release; and Carretti et al, 2013).

Boomer12k wrote: ↑Tue Mar 05, 2019 9:02 am Wow...

And Thanks, Ann...

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Locutus76 wrote: ↑Tue Mar 05, 2019 11:19 am So what are all the other purple bubbles in the image? X-Ray emitting stars within our own galaxy?

Wikipedia wrote:

At the center of the nebula lies the Crab Pulsar, a neutron star 28–30 kilometres (17–19 mi) across with a spin rate of 30.2 times per second,[6] which emits pulses of radiation from gamma rays to radio waves. At X-ray and gamma ray energies above 30 keV, the Crab Nebula is generally the brightest persistent source in the sky, with measured flux extending to above 10 TeV.

Yahchanan wrote: ↑Tue Mar 05, 2019 11:15 pm
M-106 has bubbles like this.

https://en.wikipedia.org/wiki/Messier_82 wrote:

Messier 82 (NGC 3034, Cigar Galaxy)

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This is a composite Messier 82 image made from three satellite observation projects. Visible aspects of the galaxy were taken by the HST. Spitzer photographed it in infrared, which shows dust emission, and Chandra photographed it in X-ray (showing mostly synchrotron emissions from fast electrons). The X-ray emission is shown in the blue parts. M82, like most galaxies, hosts a supermassive black hole at its center with a mass of approximately 3 x 10⁷ solar masses as measured from stellar dynamics.

Ann wrote: ↑Wed Mar 06, 2019 12:14 am
But hey, Art, I thought that the giant bubbles of M82 were due to extremely high numbers of supernova explosions from the starburst rather than outbursts of the galaxy's central black hole. Note that we can't see a jet in M82.