An international team of researchers, which included astronomers from the Netherlands Institutes for Radio Astronomy (ASTRON) and Space Research (SRON) as well as Leiden University, observed the full extent of the evolution of hot gas produced by an active black hole for the first time.
STORIES
Op zaterdag 16 oktober opent de bijzondere tentoonstelling Onder onze hemel (origineel Shared Sky), een culturele blik op de sterrenhemel door Aboriginal Australische en Zuid-Afrikaanse artiesten, in de Oude Sterrewacht in Leiden.
Using the world’s most powerful radio telescope, LOFAR, scientists have discovered stars unexpectedly blasting out radio waves, possibly indicating the existence of hidden planets.
DAILY IMAGE
Colloquium: Periodic variability of 6.7GHz methanol maser emission in high mass star-forming regions
© Image credit: Mateusz Olech (Space Radio-Diagnostics Research Centre, University of Warmia and Mazury)
High resolution observations using Very Long Baseline Interferometry suggest that they emerge in the small portion of gas and dust on the transition between accretion disc and envelope. Due to the nature of stimulated emission they are highly sensitive to changes in local physical conditions. This gives us an opportunity to study in great detail the environment of HMYSO's.
In my talk I will present my work on investigating a small group of maser sources that was recently identified showing unusual, periodic behavior. Many theories have been proposed trying to explain this behavior but to this day there is no agreement on what process could cause periodicity.
Recent studies showing synchronicity of IR and 6.7 GHz emission and discovery of an unique source with alternating methanol and water maser flares gives us new insight into this problem.
EVENTS
CAREERS
