Galaxies

Blogs about galaxies, singles ones on in clusters

The area of ​​the sky where the galaxy GS-NDG-9422, or simply 9422, was spotted, magnified in the inset in a view captured by the James Webb Space Telescope's Near Infrared Camera (NIRCam).

0

An article published in the journal “Monthly Notices of the Royal Astronomical Society” reports the discovery of a primordial galaxy that was cataloged as GS-NDG-9422, or simply 9422, in which nebular gas outshines stars. A team of researchers used observations conducted with the James Webb Space Telescope to study 9422 using in particular the NIRSpec (Near-Infrared Spectrograph) instrument to analyze its chemical composition. The conclusion is that this galaxy is in a phase never seen before in its evolution in which very massive and very hot stars make the nebular gas very hot and consequently bright.

The eROSITA bubbles seen in X-rays (green) and the magnetic field in the halo (white). The red color shows the polarized intensity of synchrotron radiation. The light blue circles represent the Fermi bubbles seen in gamma rays.

0

An article published in the journal “Nature Astronomy” reports a study of the so-called eROSITA bubbles that reveals magnetized structures that form a galactic halo aligned with them reaching heights of more than 16,000 light-years above the galactic plane. A team of researchers led by the Italian National Institute for Astrophysics conducted an investigation that spans the entire electromagnetic spectrum from radio waves to gamma rays to examine the eROSITA bubbles and map them. The alignment of the magnetized halo with the bubbles suggests a common origin, which could be given by star formation activity.

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

0

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

0

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))

0

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.