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How heavy can a graviton be?
Scientists are trying to determine the properties of the graviton – the hypothetical particle that carries the gravitational force. In a study published in the Journal of High Energy Astrophysics, based on the analysis of 12 galaxy clusters, prof. Marek Biesiada and his colleagues presented a new limit on the mass of graviton. It is seven orders of magnitude stronger than the limitations of observing gravitational waves.
Influence of gravitational darkening on the spectrum of rotating objects
Exotic, rapidly rotating objects are of interest to astrophysicists. Polish astronomers are trying to obtain information about the physical conditions inside fast-rotating neutron stars. In a work published in The Astronomical Journal, they enriched the analysis with effects resulting from the phenomenon of gravitational darkening.
Cosmology July – open registration for 5th Cosmology School
Registration for the 5th edition of the International Conference „Cosmology School – Introduction to Cosmology” co-organized by the National Centre for Nuclear Research (NCNR) has started. The conference has already become part of the schedule of Polish astrophysical scientific events and is recognized in the arena of cosmological conferences worldwide.
The history of the quasar HE 0435-5304 – the distance matters!
Publicly available data is not too popular among scientific breakthrough seekers. Usually they were extensively researched and there is nothing more to discover. However, there are exceptions, such as the quasar HE 0435-5304, which sounds boring by name.
Searching for the gravitationally lensed glow of gamma-ray bursts
NCBJ participates in the study of gamma-ray bursts (GRBs), in particular the gravitational lensing of their glow. GRBs are one of the most energetic processes in the universe.Scientists propose to extend the search for GRBs with multi-range observations of the glow of these phenomena.
How do you weigh galaxies for the greatest sky surveys?
NCBJ coordinates Polish participation in the largest observational astronomy project in history. The field of view of a telescope built in Chile will cover an area 40 times larger than the Moon’s disc. The observations planned for 10 years will provide, among others data about variable objects. Scientists from NCBJ working as part of the ASTROdust team are already preparing algorithms that will enrich the set of information obtained from the observations.
