Are we close enough to detect Dark Matter via - " Dark Matter Hurricane "


Artist impression on the Dark Matter Hurricane driving across S1

The term Dark Matter was first coined in 1906 and it all started in 1884 when Lord Kelvin estimated the number of dark bodies in the Milky-Way from the observed velocity dispersion of the stars orbiting around the centre of the galaxy and by using these measurements, he estimated the mass of the galaxy, which he determined is different from the mass of the visible stars and further in 1906 Henri Poincare published an paper called - "The Milky-Way and Theory of gases" and he used the term Dark Matter to describe Kelvin's work. But, now we all know that Dark Matter account for almost 85% of the matter present in the Universe and about a quarter of its total energy density but still we haven't detected it yet and we are unaware of its properties, its behaviour and its several other physical aspects.

But, here's an interesting part - A Dark Matter hurricane is storming past Earth and if the astronomer's calculation are correct, then our Solar System is right in the middle of this turbulent space event i.e a vast ' hurricane ' of Dark Matter, blowing at an insane speed of 500 km/sec (310 miles/sec) and it means that we are close enough to detect Dark Matter more precisely and more accurately than ever before.

Dark Matter is one of the most puzzled mysteries of our Universe. We have never directly detected it, and we don't know exactly what it is - but we do know this that it's out there. We can infer it based on the motions of stars and galaxies, which are far too fast for the amount of observable mass. So, there's something out there which is influencing gravity to make these cosmic movements possible. We can even calculate, the amount of invisible mass required to make those cosmic movements possible and scientist's are working on their ways to detect it directly and this Dark Matter Hurricane can help them to do so.


The stimulation shows the collision of Milky-way with an Dwarf Galaxy (the red spot)

So, how do Scientist's know that we are in the middle of this hurricane ? The answer lies in the motion of the stars. With the release of Gaia Satellite (launched by ESA) last year, astronomers discovered a Stellar Stream (It is an association of stars orbiting an galaxy which was once a dwarf galaxy (Dwarf galaxy consists of small, low-luminosity celestial objects with very little dust and old stellar population) that has now been torn apart by tidal forces), the dissolving remaining left by a large Dwarf Galaxy that was eaten by the Milky-Way many years ago. Scientists have detected several other streams too across the galaxy, but the S1 stream is important in that, because the neighbourhood of Solar System is engaged right in the path of 30,000 stars and the Dark Matter associated with the Dwarf Galaxy left behind is moving along with the stream. While there are over 30 such streams known in our galaxy and our path will intersect with them for million of more years but, this will not effect us by any sort of physical manner because there is only one star present in our Solar-System i.e our Sun.


An artist impression of our Sun lying in the S1 stream

Theoretical Physicist Ciaran O'Hare from the University of Zaragoza in Spain has led a team of researchers in figuring out the effects of S1 on the Dark Matter in our little corner of the galaxy. They looked at the different models for the density and distribution of Dark Matter flowing in the S1 stream and then predicted that the Dark Matter models can be predicted by the detectors present here on Earth. Scientist still don't know what Dark Matter really is - there are many leading theories but no-one know's for sure. A statement says - "Current detectors searching for the weakly interacting massive particles (WIMP's) probably won't see anything from S1 stream but future tech might". The S1 stream can provide us an opportunity to detect some sort of new sub-atomic particles which constitutes Dark Matter and with the help of this discovery we can understand the mystery of Dark Matter and this would help mankind to take a major step forward in order to understand the Cosmos more precisely !

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