The X-ray group of IAASARS at NOA, organises a conference in Corfu, Greece, in 19-22 June 2019. The title of the conference is: “Supermassive Black Holes: Environment and Evolution”

Astronomers detected a Gamma Ray Burst (GRB) candidate that its gamma rays were not detected by our telescopes!!

Credit: ESO Astronomers detected flares of infrared radiation coming from Sagittarius A*, the massive object at the heart of our Galaxy, This observation confirms that Sagittarius A* is indeed a supermassive black hole (SMBH)!! The flares were detected using the Read More …

Many studies try to shed light on the origin of AGN obscuration. In a recent work, astronomers observed Cygnus-A, a radio galaxy about 750 million light-years from us that hosts a supermassive black hole (SMBH) which generates massive jets. These jets extent to about 150,000 light years. Their analysis reveals the presence of a strong magnetic field that regulates the feeding of the SMBH.

   Το παρατηρητήριο ακτίνων-Χ, ATHENA της Ευρωπαϊκής Υπηρεσίας Διαστήματος και η ελληνική συμμετοχή Το διαστημικό τηλεσκόπιο ακτίνων-Χ, ATHENA, μια συνεργασία της ευρωπαϊκής υπηρεσίας διαστήματος, ESA, της NASA και της Iαπωνικής Jaxa θα παρατηρήσει την ακτινοβολία που εκλύει το Σύμπαν στις Read More …

Astronomers from the National Observatory of Athens and the Niels Bohr Institute, used the largest X-ray sample up to date to investigate how active supermassive black holes (SMBH) at the centre of galaxies affect their star formation. They found that, in a similar manner as an oscillator tries to keep the system around the equilibrium point, the SMBH (oscillator) tries to keep the galaxy in the main sequence (equilibrium point)!!

Is there a feeding mechanism that activates supermassive black holes at the centre of galaxies or active black holes occur naturally during the lifetime of a galaxy?

Neutrinos are particle in the size of electrons, but without charge. We know that they have mass, but we haven’t measured it yet. Although they are everywhere (our bodies are hit by about 100 trillion neutrinos every second), neutrinos cannot be detected since they rarely interact with matter. Scientists now managed to spot one of them and trace its origin, a blazar located 3 billion light years away from us!

Astronomers have detected X-rays from Uranus for the first time, using NASA’s Chandra X-ray Observatory. This result may help scientists learn more about this enigmatic ice giant planet in our Solar System. Uranus is the seventh planet from the Sun Read More …

A new project using sonification turns astronomical images from Chandra and other telescopes into sound. As the cursor moves across the images, sounds represent the position and brightness of the sources in which each telescope plays a different instrument. Previously, Read More …

Gravitational waves are invisible (yet incredibly fast) ripples in the otherwise tough, stiff fabric of spacetime. Gravitational waves travel at the speed of light and squeeze and stretch anything in their path as they pass by. Gravitational waves are fundamentally Read More …

Astronomers may have found the most distant supermassive black hole with a jet detected in X-rays using NASA’s Chandra X-ray Observatory. The source of this jet is a quasar — a rapidly growing supermassive black hole — named PSO J352.4034-15.3373 Read More …

In the first all-sky survey by the eROSITA X-ray telescope onboard SRG, astronomers at the Max Planck Institute for Extraterrestrial Physics have detected the largest in terms of apparent size supernova remnant ever observed in X-rays. The supernova remnant (SNR) Read More …