News and Recent Results

eROSITA sees changes in the most powerful quasar

Researchers have observed the X-ray emission of the most luminous quasar seen in the last 9 billion years of cosmic history. Significant changes in the quasar’s emission give a new perspective on the inner workings of quasars and how they interact with their environment. The study was led by Dr Elias Kammoun, a postdoctoral researcher at the Research Institute in Astrophysics and Planetology (IRAP), and Zsofi Igo, a PhD candidate at the Max Planck Institute for Extraterrestrial Physics (MPE). more

Helium-burning white dwarf discovered

A white dwarf star can explode as a supernova when its mass exceeds the limit of about 1.4 solar masses. A team led by the Max Planck Institute for Extraterrestrial Physics has now found a binary star system in which matter flows onto the white dwarf from its companion. The system was found due to bright, so-called super-soft X-rays, which originate in the nuclear fusion of the overflowed gas near the surface of the white dwarf. The unusual thing about this source is that it is helium and not hydrogen that overflows and burns. The measured luminosity suggests that the mass of the white dwarf is growing more slowly than previously thought possible, which may help to understand the number of supernovae caused by exploding white dwarfs. more

Serendipitous detection of a rapidly accreting black hole in the early Universe

eROSITA telescope finds an X-ray bright, optically faint quasar accreting material at an extremely high rate only about 800 million years after the big bang more

Star on a dangerous path provides regular meals for supermassive black hole

eROSITA all-sky survey detects repeating X-ray flares in an otherwise quiescent galaxy. more

ORIGINS PhD Award 2022 for Riccardo Arcodia

This year, one of the ORIGINS Cluster PhD awards goes to Riccardo Arcodia from the Max Planck Institute for Extraterrestrial Physics for his excellent thesis. The ORIGINS PhD Awards were presented at a ceremony during the ORIGINS Science Week, which took place from November 28th to December 1st, 2022 at Seeon Monastery. more

IAU PhD prize awarded to Riccardo Arcodia

The IAU has awarded MPE junior scientist Riccardo Arcodia with a PhD prize for his thesis on “Accretion onto black holes across the mass scale”. Along with the other nine prizewinners, he will give a talk at the next IAU general assembly, taking place at the beginning of August in Busan, Republic of Korea. more

<strong>Explosion observed on a White Dwarf </strong>

When stars like our Sun use up all their fuel, they shrink to form white dwarfs. Sometimes such dead stars flare back to life in a super-hot explosion, called a “nova”, and produce a fireball of X-ray radiation. Using the eROSITA telescope on the SRG space observatory, a research team led by Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) has now been able to observe such an explosion of X-ray light for the very first time. more

<p>eROSITA witnesses the awakening of massive black holes</p>

Using the SRG/eROSITA all-sky survey data, scientists at the Max Planck Institute for Extraterrestrial Physics have found two previously quiescent galaxies that now show quasi-periodic eruptions. The nuclei of these galaxies light up in X-rays every few hours, reaching peak luminosities comparable to that of an entire galaxy. The origin of this pulsating behaviour is unclear. A possible cause is a stellar object orbiting the central black hole. As these galaxies are relatively close and small, this discovery could help scientists to better understand how black holes are activated in low-mass galaxies. more

<p>Hoinga – the largest supernova remnant ever discovered with X-rays</p>

In the first all-sky survey by the eROSITA X-ray telescope onboard SRG, astronomers at the Max Planck Institute for Extraterrestrial Physics have identified a previously unknown supernova remnant, dubbed “Hoinga.” The finding was confirmed in archival radio data and marks the first discovery of a joint Australian-eROSITA partnership established to explore our Galaxy using multiple wavelengths, from low-frequency radio waves to energetic X-rays. The Hoinga supernova remnant is very large and located far from the galactic plane – a surprising first finding – implying that the next years might bring many more discoveries. more

<p>eROSITA finds large-scale bubbles in the halo of the Milky Way</p>

Gigantic hot-gas structures above and below the galactic disc are probably due to shock waves generated by past energetic activity in the center of our Galaxy. more

Show more

Forschungsbericht 2014 - Max-Planck-Institut für extraterrestrische Physik
Our Solar System in X-rays – a novel view of our cosmic home
Solar system X-ray research has experienced a boost during the last two decades. Before 1996, Sun, Earth, Moon, and Jupiter were the only solar system X-ray sources known. Since then, this number has considerably increased, including now also Mercury, Venus, Mars, Saturn, the Jovian moons Io and Europa, the Io plasma torus, the rings of Saturn, two asteroids, as well as comets as an unexpected new class, and even the heliosphere itself. This article outlines the sequence of discoveries, describes how the X-ray emissions originate, explains their importance, and concludes with an outlook. more

A Window to the Past:

In the following frame, all news  from the High-Energy Astrophysics group before February 2011 are made available in the format prior to the release of the new MPE web site.

Please be aware that some of the links may not be functioning anymore!


Go to Editor View