ram-pressure stripping

ram-pressure stripping

The removal of gas from a rapidly moving system, such as a cluster galaxy, by the friction of its passage through a dense medium. This is observed to be happening to the galaxy M86 in the Virgo cluster as it moves through the intracluster medium.
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Right now, this ram-pressure stripping is operating tens of thousands of light-years from the galaxy's center, but it won't stop there.
While ram-pressure stripping may produce lenticular galaxies in massive clusters, it cannot satisfactorily explain why every cluster, big or small, contains an ancient, red elliptical galaxy at its hub.
If ram-pressure stripping only operates under certain circumstances, and stellar feedback has only limited range in larger galaxies, then only one alternative remains to explain giant, red-and-dead ellipticals: black holes.
So are external processes, such as ram-pressure stripping or interactions with other galaxies, ever important?
Something is quenching these galaxies, whether it be black hole feedback, stellar outflows, or ram-pressure stripping.
In the process, though, they have discovered that the untimely death of galaxies through a phenomenon known as ram-pressure stripping is more common than previously thought.
On the contrary, what ram-pressure stripping does is bop the galaxy on the head and remove its gas very quickly-of the order of tens of millions of years-and astronomically speaking that's very fast.
As galaxies fall through these larger halos, the superheated intergalactic plasma between them removes their gas in a fast-acting process called ram-pressure stripping," Brown said.
Several loss mechanisms are possible, including ram-pressure stripping by intracluster gas, gravitational interactions with other galaxies within the cluster, and gas outflows due to simultaneous supernova explosions triggered by the ram pressure or gravitational encounters.
ESO 137-001 is being robbed of its raw materials by a process called ram-pressure stripping, which happens when an object moves at high speed through a liquid or gas.
These loner galaxies "must have been born without the benefit of ram-pressure stripping, [and] it makes no sense to think that the processes that make S0s in these less dense environments are not at work in clusters," he asserts.
We now have to link these observations of ram-pressure stripping from the past .