New Study Sets Stronger Mass Limit on Ultralight Bosonic Dark Matter

Over 80 years, darkish matter has been an amazing thriller for the researchers. Elusive of direct remark, it has made its existence identified solely by the gravitational impacts it makes on cosmic constructions. Even although there’s lots of oblique proof of its existence, the true nature of darkish matter continues to be unknown. An essential attribute of its particle is mass. While previous research have constrained the mass of fermionic darkish matter utilizing quantum rules like Pauli’s exclusion precept, bosonic darkish matter remained much less constrained. In a current examine, scientists have estimated a brand new decrease sure on the mass of ultra-lightweight bosonic darkish matter particles.

About the examine

According to the examine printed in Physical Review Letters, the mass of ultralight bosonic darkish matter should be greater than 2 × 10-21 electron volts (eV), 100 occasions greater than earlier estimates utilizing Heisenberg’s uncertainty precept.

The workforce of researchers, led by the primary creator of the examine, Tim Zimmermann, a Ph.D. candidate on the Institute of Theoretical Astrophysics, University of Oslo, targeted their methodology on the information of Leo II, the Milky Way’s satellite tv for pc galaxy. It is a dwarf galaxy 1,000 occasions smaller than the Milky Way. By analyzing the inner motions of stars inside Leo II—closely influenced by darkish matter—the workforce derived 5,000 doable darkish matter density profiles utilizing a software referred to as GRAVSPHERE.

They in contrast these with profiles generated by quantum wave features of assorted darkish matter particle lots. If the particle is just too mild, quantum fuzziness spreads it too thinly, stopping it from forming the noticed constructions. The examine concluded that the darkish matter particle will need to have a mass larger than 2.2 × 10⁻²¹ electron volts (eV)—over 100 occasions greater than earlier decrease estimates.

Impact on darkish matter research

The findings have important implications for in style ultralight darkish matter fashions, notably fuzzy darkish matter, which usually proposes particles with lots round 10-22 ev.

Looking forward, the workforce plans to increase their methodology to blended darkish matter situations, the place darkish matter consists of particles with totally different lots.