Have We Detected Dark Energy? Cambridge Scientists Say it’s A Possibility (Cosmology)

Dark energy, the mysterious force that causes the universe to accelerate, may have been responsible for unexpected results from the XENON1T experiment, deep below Italy’s Apennine Mountains. It was surprising that this excess could in principle have been caused by dark energy rather than dark matter. When things click together like that, it’s really special. … Continue reading Have We Detected Dark Energy? Cambridge Scientists Say it’s A Possibility (Cosmology)

How Would Be Rotating and Non Rotating Dark Energy Stars? (Cosmology)

By adopting the extended Chaplygin equation-of-state, Ilidio Lopes and colleagues carried out study on the isotropic and slowly-rotating dark energy stars. They found that the moment of inertia increases with the mass of the star and in the case of non-rotating objects the moment of inertia grows faster. Their study recently appeared in Arxiv. A … Continue reading How Would Be Rotating and Non Rotating Dark Energy Stars? (Cosmology)

Whats The Importance Of Black Hole Repositioning? (Cosmology)

Based on a suite of smoothed particle hydrodynamics simulations with the swift code and a Bondi-Hoyle-Lyttleton subgrid gas accretion model, Yannick Bahe and colleagues investigated the impact of repositioning on SMBH growth and on other baryonic components through AGN feedback. They found that repositioning has direct physical consequences such as it promotes SMBH mergers and … Continue reading Whats The Importance Of Black Hole Repositioning? (Cosmology)

What Is The Structure & Properties Of Accretion Disk Around A Rotating Black Hole Without Reflection Symmetry? (Cosmology)

By adopting a theory-agnostic approach and considering a recently proposed Kerr-like black hole model, Chen and Yang investigated the structure and properties of accretion disk around a rotating black hole without reflection symmetry. They showed that, in the absence of reflection symmetry, the accretion disk is curved surface in shape. Furthermore, they found that the … Continue reading What Is The Structure & Properties Of Accretion Disk Around A Rotating Black Hole Without Reflection Symmetry? (Cosmology)

Could 3-Form Wormholes Be Black Hole Mimickers? (Cosmology)

Mariam Bouhmadi-Lopez and colleagues have constructed a symmetric wormhole solution in General Relativity (GR), which is supported by a 3-form field with a potential that contains a quartic self-interaction term. They hint towards the possibility that, the 3-form wormholes could be potential black hole mimickers, as long as the coefficient of the quartic self-interaction term … Continue reading Could 3-Form Wormholes Be Black Hole Mimickers? (Cosmology)

Found A “Splinter” in the Milky Way (Cosmology)

Astronomers have identified a strange feature never before seen in our galaxy: a cluster of young stars and gas clouds protruding from Sagittarius’ arm like a splinter sticking out of a wooden plank. About three thousand light years long, it is the first large structure identified with an orientation so drastically different from that of the … Continue reading Found A “Splinter” in the Milky Way (Cosmology)

Black Hole Size Revealed by its Eating Pattern (Cosmology)

The feeding patterns of black holes offer insight into their size, researchers report. A new study revealed that the flickering in the brightness observed in actively feeding supermassive black holes is related to their mass. Supermassive black holes are millions to billions of times more massive than the sun and usually reside at the center … Continue reading Black Hole Size Revealed by its Eating Pattern (Cosmology)

How Many Types Of Singularities Exist In The Gravitational Waves? (Cosmology)

Yu-Zhu Chen and colleagues discussed gravitational waves with the exact cylindrical gravitational wave solutions. They showed that, there are two kinds of singularities in gravitational waves: source singularity and resonance singularity. Their study recently appeared in the Journal Symmetry. In the weak field or say, linear approximation, gravitational waves are regarded as linear waves, which … Continue reading How Many Types Of Singularities Exist In The Gravitational Waves? (Cosmology)

How Primordial Blackholes Forms From The Gauss-Bonnet-Corrected Single Field Inflation? (Cosmology)

Countless number of primordial blackholes formation scenarios have been already discussed by us on our website. Now, Shinsuke Kawai and Jinsu Kim proposed another interesting mechanism for the primordial blackhole formation. They considered a model in which a scalar field is coupled to the Gauss-Bonnet term, and showed that primordial blackholes may be seeded when … Continue reading How Primordial Blackholes Forms From The Gauss-Bonnet-Corrected Single Field Inflation? (Cosmology)