@MPIfR_Bonn Spannende Sache. Dass Markarian 501 eventuell ein binäres supermassereiches Schwarzes Loch im Zentrum hat, wurde schon 2003 von Rieger und Mannheim vorgeschlagen.
https://ui.adsabs.harvard.edu/abs/2003A%26A...397..121R/abstract
We analyse the apparent disagreement between the mass estimates of the central black hole(s) in Mkn 501 based on (i) the observations of the host galaxy, (ii) the high energy (HE) emission mechanism, and (iii) the modulation of the beamed radiation by a black hole (BH) binary system. While method (i) seems to imply a central mass ga 5x 10<SUP>8</SUP> M<SUB>sun</SUB>, method (ii) suggests a BH mass less than =~ 6 x 10<SUP>7</SUP> M<SUB>sun</SUB>. We critically discuss the estimates inferred from (i) showing that current uncertainties may permit a central mass as low as =~ (2-3)x 10<SUP>8</SUP> M<SUB>sun</SUB>. We demonstrate that in this case the estimates (i) and (ii) might be brought into agreement by assuming a binary BH system where the jet dominating the HE emission originates from the less massive (secondary) BH as suggested by method (iii). On the other hand, if Mkn 501 has in fact a high central BH mass of order 10<SUP>9</SUP> M<SUB>sun</SUB>, a change of fundamental assumptions seems to be required in the context of several HE emission models. We show, that in this case a binary scenario following (iii) may be still possible if the jet which dominates the emission emerges from the more massive (primary) BH and if the binary evolution passes through phases of super-Eddington accretion and/or decreased conversion efficiency.
#TachyonBeam #astronomy #galaxies #SMBH #AGN
A rare example of three active galactic nuclei in three merging galaxies has been discovered using two radio telescopes: the VLA and the VLBA. The triple system is cataloged as J1218/1219+1035. This targeted study, conducted by a team of researchers at various radio frequencies, has identified only the third case of a triple active galactic nucleus, the first confirmed through radio observations.
#ESA:
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Flaring black hole whips up ultra-fast winds
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"Leading X-ray space telescopes XMM-Newton and XRISM have spotted an extraordinary blast from a supermassive black hole. In a matter of hours, the gravitational monster whipped up powerful winds, flinging material out into space at eye-watering speeds of 60 000 km per second."
9.12.2025
#AGN #BlackHole #JAXA #NGC3783 #Röntenstrahlung #SchwarzesLoch #SMBH #SRON #Weltraumteleskop #XMM #XRISM #Xray
Leading X-ray space telescopes XMM-Newton and XRISM have spotted an extraordinary blast from a supermassive black hole. In a matter of hours, the gravitational monster whipped up powerful winds, flinging material out into space at eye-watering speeds of 60 000 km per second.
@setiinstitute is this Galaxy similar to our, with its new found barred structure? Will the Milky Way have a similar ring around its monstrous SMBH core?
#UHH:
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Entdeckung eines neuen „Little Red Dots“ in einer sehr massereichen Umgebung
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"Forschende .. haben ein sogenanntes Little Red Dot im frühen Universum entdeckt. Diese Klasse von Objekten ist erst seit Kurzem bekannt und könnte neue Einblicke in die Entstehung sowie Entwicklung supermassereicher Schwarzer Löcher geben .."
17.9.2025
#Astronomie #COSMOS3D #Hamburg #JWST #LittleRedDot #Quasar #Rotverschiebung #SchwarzesLoch #SMBH #Weltraumteleskop
Cosmology: The Moon is our Future
The limits of cosmology, by Joseph Silk
https://arxiv.org/abs/2509.08066
#Cosmology #LunarAstronomy #LunarTelescope #LunarTelescopes #teslescope #telescopes #radioastronomy #radiotelescope #radioteslescopes #galaxies #Moon #exoplanets #astrodon #Astronomy #Astrophysics #SMBH #blackholes #bigbang #universe #science
Hubble Captures an Active Galactic Center
Credit: ESA/Hubble & NASA, M. J. Koss, A. J. Barth
https://science.nasa.gov/missions/hubble/hubble-captures-an-active-galactic-center/
#Astronomy #Astrophysics #Astrodon #space #science #Hubble #galaxy #galaxies #blackhole #SMBH
Extreme nuclear transients: a new study using space and ground-based data from NASA, ESA, and other institutions describes three extreme examples of supermassive black holes feasting on massive stars.
☑️ https://science.nasa.gov/science-research/astrophysics/3-black-holes-caught-eating-massive-stars-in-nasa-data/
☑️ https://www.science.org/doi/10.1126/sciadv.adt0074
This is the Million Earth star system, and you can see how useful Super Massive Black Holes can be.
I would imagine the local 'gods' would be fighting over our one at the centre of the Milky Way....
https://planetplanet.net/2018/06/01/the-million-earth-solar-system/
Six years since ALMA crucially helped the Event Horizon Telescope take the first image of a supermassive black hole in a distant galaxy… you can relive it all below!
https://www.almaobservatory.org/en/press-releases/astronomers-capture-first-image-of-a-black-hole/
#ALMA #AtacamaLargeMillimeterSubmillimetreArray #AtacamaLargeMillimeterArray #EHT #EventHorizonTelescope #BH #BlackHole #SuperMassiveBlackHole #SMBH #EHTBlackHole #RealBlackHole
Press Conference Streaming The Event Horizon Telescope (EHT), a planet-scale array of eight ground-based radio telescopes forged through international collaboration, was designed to capture images of a black hole. Today, in coordinated press conferences across the globe, EHT researchers reveal that they have succeeded, unveiling the first direct visual evidence of a supermassive black hole...
Christoph Wendel
Massimo Luciani
RTN
Lazarou Monkey Terror 🚀💙🌈
Daniel Pomarède
Dr. Juande Santander-Vela