The argument about the nature of midget galaxies has been renew with claim that the characteristics of our small neighbor do not fit the dominant good example of astronomical formation . While the argument sound esoteric there could be unplumbed effect for cosmology more generally if the late paper proves correct .
Thelambda frigid drear mattermodel predicts that galaxies should form in halos of dark matter , with a spacious distribution and effectively random motion .
" But what astronomer see is different , " says Dr Marcel Pawlowski of Case Western Reserve University . " We see the satellite galaxies are in a huge magnetic disc and make a motion in the same way within this disk , like the planets in our solar system moving in a thin plane in one steering around the Dominicus . That ’s unexpected and could be a real problem . "
The Milk Way has what is call theMagellanic Plane , which takes in almost all the known dwarf galaxies and principal clusters . planet galaxies can be hard to see when they are hidden by thegalactic centeror other dense accelerator pedal clouds so our knowledge may be incomplete , but a similar normal has been observed around Andromeda , where half the orbiter galaxiesform the “ Great carpenter’s plane ” .
Whether this is aproblemornotfor possibility of galactic organization has been a depicted object for debate for several years .
Pawlowski is one of those who has antecedently suggested there distribution is not in stay fresh with theoretic models , having previously claimed , “ The probability to line up the ascertained clustering of streams is only 0.3 % ”
publish inMonthly Notices of the Royal Astronomical SocietyPawlowski and 13 atomic number 27 - writer have rejectedthreerecentpapersthatconcludedobservations and possibility align . " When we compared simulations using their datum to what is observed by astronomer , we constitute a very substantial mismatch , " Pawlowski says . Out of chiliad of pretence of galaxies like the Milky Way , only one trial farm something that match what is observed .
" But we also have Andromeda , " Pawlowski said . " The chance to have two galaxy with such vast disks of artificial satellite wandflower is less than one in 100,000 . "
If the stock establishment model is wrong , some very important melodic theme could come into interrogative sentence . " The stock model check various putative ingredients — such as dark matter and dark Department of Energy — which were introduced because the poser was n’t reproducible with observation , " said Dr Benoit Famaey , of the University of Strasbourg ,
Famaey and Pawlowski advocate an older , but now largely discarded , possibility of the origination of satellite dwarf galaxies . They propose that arrays of satellite go on when two big beetleweed clash , ripping stuff from each and hold it to substantial distance where it formed“tidal dwarf Galax urceolata ” . " Standard extragalactic nebula must contain dark issue , but tidal Galax urceolata can not take dark matter , ” says Bonn University ’s Professor Pavel Kroupa , another of the newspaper ’s source . " There ’s a very serious struggle , and the backlash is we do not seem to have the correct theory of sobriety . "
If the paper ’s authors are right a major revision of dark energy and matter – thought to predominate the mass of the universe compared to the 5 % we can see – will be need . Such a major challenge will require plenty more grounds behind it to gain widespread acceptance . However , carbon monoxide gas - source Professor David Merritt of Rochester Institute of Technology says , " When you have a clean contradiction like this , you ought to focus on it . This is how progress in skill is made . "
Marcel Pawlowski . This simulation of the effects of two galaxies colliding suggests an explanation for the distribution of satellite galaxies around our own .
