Black holes

Artist's concept of a primordial dwarf galaxy with a fast growing supermassive black hole (Image NOIRLab/NSF/AURA/J. da Silva/M. Zamani)

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An article published in the journal “Nature Astronomy” reports the results of the study of the dwarf galaxy cataloged as LID-568, which has at its center a supermassive black hole that is devouring materials at a rate that is more than 40 times faster than its theoretical limits. A team of researchers led by astronomer Hyewon Suh of the International Gemini Observatory/NSF NOIRLab combined observations conducted with the Chandra and James Webb space telescopes to obtain precise data on this voracious supermassive black hole. We see it as it was about 1.5 billion years after the Big Bang and its discovery indicates a way in which these very extreme objects manage to grow so quickly.

Illustration of a black hole and the region surrounding it with the corona bright at X-rays (Image NASA/Caltech-IPAC/Robert Hurt)

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An article published in “The Astrophysical Journal Letters” reports the results of a study on the region of very hot plasma that surrounds a black hole called the corona. A group of researchers used detections conducted with the IXPE space telescope to obtain precise information on the corona of 12 black holes ranging from stellar-mass ones to supermassive black holes. For the first time, it was possible to observe the geometry of the corona of black holes and its relationship with the accretion disk that surrounds them. The geometry seems very similar regardless of the size of the black holes but this is still a tentative result.

The Arp 107 pair seen in the near and mid-infrared by a combination of several filters of the James Webb Space Telescope's MIRI and NIRCam instruments

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An image captured by the James Webb Space Telescope shows Arp 107, a pair of interacting galaxies. The spiral galaxy UGC 5984 (or PGC 32620) and the elliptical galaxy MCG +05-26-025 (or PGC 32628) will eventually merge. The Arp 107 pair was already studied several times with various telescopes but the combination of the MIRI (Mid-Infrared Instrument) and NIRCam (Near-Infrared Camera) instruments allowed to capture many new details of the star formation activity triggered by the interaction between the two galaxies.

The Hubble Ultra Deep Field with an inset that shows a magnification of two primordial galaxies, one of which contains a supermassive black hole

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An article published in “The Astrophysical Journal Letters” reports the results of a census of the youngest supermassive black holes that existed in the early universe. A team of researchers used observations conducted with the Hubble Space Telescope that started from the so-called Hubble Ultra Deep Field to search for primordial supermassive black holes with the addition of data recently collected using the James Webb Space Telescope. The conclusion is that these objects are more numerous than expected, a confirmation that they formed very quickly. This new study will help to understand how.

An image from the CEERS survey (Image NASA, ESA, CSA, Steve Finkelstein (UT Austin))

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An article published in “The Astrophysical Journal” reports the results of a study of primordial galaxies that seemed too massive for their age, concluding that it was actually the light generated by the activity of their supermassive black holes that created a wrong impression. A team of researchers led by Katherine Chworowsky, a graduate student at the University of Texas at Austin (UT Austin), examined observations conducted with the James Webb Space Telescope as part of the Cosmic Evolution Early Release Science (CEERS) survey to reach these conclusions.