Tag Archive for 'Merger'

Illustration of the quasar triplet system and its environment. Image credit: Ni et al., doi: 10.3847/2041-8213/aca160.

New Study Sheds Light on Origin of Ultramassive Black Holes in Early Universe

Mar 2, 2023 by News Staff

Ultramassive black holes with extreme masses of over 50 billion solar masses can be formed in the rare events that are multiple quasar mergers happening...

Two dwarf-dwarf galaxy mergers in galaxy clusters Abell 133 (left) and Abell 1758S (right) are shown in X-rays from Chandra and optical light from the Canada-France-Hawaii telescope. The merger on the left is in a late stage and was given the single name of Mirabilis. The other merger is in the early stages and the two dwarf galaxies are named Elstir (bottom) and Vinteuil (top). Image credit: NASA / CXC / University of Alabama / Micic et al. / International Gemini Observatory / NOIRLab / NSF / AURA.

Chandra Spots Two Pairs of Supermassive Black Holes on Collision Courses

Feb 23, 2023 by News Staff

According to observations and cosmological simulations, dwarf galaxies are the most abundant type of galaxies in the early Universe and the galaxy merger...

This artist’s conception shows two supermassive black holes, similar to those observed by Bansal et al, orbiting one another more than 750 million light years from Earth. Image credit: Josh Valenzuela, University of New Mexico.

Novel Model Paves Way for Deeper Understanding of Structure of Merging Black Holes

Feb 22, 2023 by News Staff

In 2015, astrophysicists for the first time detected gravitational waves, ripples in space-time that occur when neutron star or black hole mergers disrupt...

This Hubble image shows SDSSCGB 10189, a trio of merging galaxies located in the constellation of Boötes. Further to the left is an unconnected, dimmer spiral galaxy. Image credit: NASA / ESA / Hubble / M. Sun.

Hubble Spots Trio of Colliding Star-Forming Galaxies

Feb 13, 2023 by Enrico de Lazaro

Astronomers using the NASA/ESA Hubble Space Telescope have produced an outstanding image of a trio of merging galaxies called SDSSCGB 10189. This Hubble...

Dey et al. uncovered striking new evidence for a mass migration of stars into the Andromeda galaxy. Image credit: KPNO / NOIRLab / AURA / NSF / Local Group Survey Team / T.A. Rector, University of Alaska Anchorage / D. de Martin / M. Zamani.

Galactic Immigration Event Occurred in Andromeda Galaxy 1-2 Billion Years Ago

Feb 8, 2023 by News Staff

The Andromeda galaxy (Messier 31), which is located 2.5 million light-years away, is the Milky Way’s nearest large galactic neighbor. By measuring the...

This composite image shows at least three galaxy clusters colliding in a jumbled scene. The resulting giant galaxy cluster, known as Abell 2256, resembles a grainy, pixilated, sky blue cloud topped with licks of flaming red hair. The cloud is adorned with red shapes and streaks, and set against a black background heavily dotted with colorful specks. The image combines X-ray, radio, optical, and infrared data. Image credit: NASA / CXC / University of Bolonga / Rajpurohit et al. / ESA / XMM-Newton / LOFAR / ASTRON / NCRA / TIFR / GMRT / NSF / NRAO / VLA / Pan-STARRS.

Astronomers Capture Ongoing Collision of Three Galaxy Clusters

Feb 1, 2023 by News Staff

Using NASA’s Chandra X-ray Observatory, ESA’s XMM-Newton and three radio telescopes (the Giant Metrewave Radio Telescope, the Low Frequency Array,...

Computer simulation of neutron stars merging to form a black hole, with their accretion disks interacting to produce electromagnetic waves. Image credit: L. Rezolla, AEI / M. Koppitz, AEI & Zuse-Institut Berlin.

Gravitational Waves May Reveal Start of Time, Physicists Say

Jan 23, 2023 by News Staff

Princeton Plasma Physics Laboratory physicists Deepen Garg and Ilya Dodin say they can better understand the state of the cosmos shortly after the Big...

This artist’s conception shows the galaxy merger and its two central black holes. Image credit: ALMA / ESO / NAOJ / NRAO / M. Weiss, NRAO, AUI & NSF.

UGC 4211’s Pair of Supermassive Black Holes is Closest to Colliding Ever Seen

Jan 11, 2023 by News Staff

While close together in cosmological terms at just 750 light-years apart, or 6x the black hole sphere of influence, the supermassive black holes in the...

A neutron star (blue sphere) spins in the center of a colorful disk of gas, some of which follows the magnetic field (blue lines) and flows (blue-white arcs) onto the object’s surface. Image credit: NASA’s Goddard Space Flight Center Conceptual Image Lab.

Astronomers Discover Short-Lived Superheavy Neutron Stars

Jan 10, 2023 by News Staff

Astronomers have examined data about 700 short gamma-ray bursts (GRBs) detected with NASA’s Neil Gehrels Swift Observatory, Fermi Gamma-ray Space Telescope,...

When neutron stars merge, they can produce radioactive ejecta that powers a kilonova signal, as this conceptual image shows. Image credit: Dreamstime.

Hybrid Neutron-Star Merger Detected for the First Time

Dec 7, 2022 by News Staff

Gamma-ray bursts (GRBs) come in two varieties, long and short. Long GRBs, which last a couple of seconds to one minute, form when a star at least 10 times...

This Webb image shows the merging galaxy pair ZW II 96. Image credit: NASA / ESA / CSA / Webb / L. Armus / A. Evans / Hubble Heritage Team / STScI / AURA / Hubble Collaboration.

Webb Watches Cataclysmic Collision of Two Galaxies

Dec 1, 2022 by Enrico de Lazaro

The Webb team has released a beautiful photo taken by the NASA/ESA/CSA James Webb Space Telescope of ZW II 96, a merging galaxy pair in the constellation...

Two galaxies in the Arp-Madore 417-391 system (right) form a ring shape, which is narrow and blue, and the cores of the two galaxies form a bulge on the ring’s side. Two smaller spiral galaxies appear left of center as well as a few stars. Image credit: NASA / ESA / Hubble / Dark Energy Survey / DOE / FNAL / DECam / CTIO / NOIRLab / NSF / AURA / J. Dalcanton.

Hubble Space Telescope Observes Peculiar Galaxy Merger

Nov 21, 2022 by Enrico de Lazaro

This system of two massive galaxies — located in the southern constellation of Eridanus — is called Arp-Madore 417-391. Two galaxies in the...

The MACS0647-JD galaxy system. Image credit: NASA / ESA / CSA / Webb / STScI / Tiger Hsiao, Johns Hopkins University / Alyssa Pagan, STScI.

Webb Spots Possible Galaxy Merger in Early Universe

Oct 26, 2022 by Natali Anderson

Astronomers say we may be witnessing a merger of two small galaxies just 400 million years after the Big Bang. The galaxy cluster MACS0647 acts as a cosmic...

IC 1623 is approaching the final stage of its merger, when a violent central inflow of gas will trigger intense starburst activity that could boost the infrared luminosity above the ultraluminous threshold. Image credit: NASA / ESA / CSA / Webb / L. Armus / A. Evans / R. Colombari.

Webb Observes Interacting Galaxy System IC 1623

Oct 26, 2022 by Natali Anderson

NASA has released a stunning image snapped by the NASA/ESA/CSA James Webb Space Telescope of IC 1623, an ongoing cosmic collision between two irregular...

An artist’s impression of a jet emanating from NGC 4993. Image credit: J.A. Biretta et al / NASA / ESA / Hubble Heritage Team / STScI / AURA / Sci-News.com.

Hubble Observes Ultra-Relativistic Jet from Neutron-Star Merger

Oct 14, 2022 by News Staff

GW170817, a titanic collision between two neutron stars detected in August 2017, ejected a structured relativistic jet with a speed greater than 99.97%...

This artist’s conception shows the stream of gas and stars that were flung away from a massive galaxy during its merger with a smaller galaxy. Image credit: ALMA / ESO / NAOJ / NRAO / S. Dagnello, NRAO, AUI & NSF.

Massive Galaxy Strips Star-Forming Gas from Smaller Galaxy during Encounter

Aug 30, 2022 by News Staff

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) and the NASA/ESA Hubble Space Telescope have observed SDSS J144845.91+101010.5,...

The main panel of this image shows a wide-field view of NGC 4424 in optical light from Hubble. The image is about 45,000 light-years wide. The inset features a close-up view of NGC 4424 that shows Chandra X-ray data (blue) plus a version of the optical data (red) that has had light from a model of NGC 4424 subtracted from the image to show other faint features. This inset image is about 1,700 light-years across. The Nikhuli star cluster is the elongated red object. Image credit: NASA / CXC / Swinburne University of Technology / Graham et al. / ESA / STScI.

Astronomers Witness ‘Black Hole Delivery System’ in Action

Aug 18, 2022 by Natali Anderson

A rare intermediate-mass black hole may have been delivered to the barred spiral galaxy NGC 4424 by another, smaller galaxy, according to an analysis of...

This image of NGC 7727 was captured by the FORS2 instrument on ESO’s Very Large Telescope. Image credit: ESO.

VLT Sees Spectacular Cosmic Collision: NGC 7727

Aug 16, 2022 by Enrico de Lazaro

Astronomers using the FOcal Reducer and low dispersion Spectrograph 2 (FORS2) instrument on ESO’s Very Large Telescope (VLT) have taken a picture of...

This image from the Gemini North telescope shows a pair of interacting spiral galaxies: NGC 4568 (bottom) and NGC 4567 (top). Image credit: International Gemini Observatory / NOIRLab / NSF / AURA / T.A. Rector, University of Alaska Anchorage & NSF’s NOIRLab / J. Miller, Gemini Observatory & NSF’s NOIRLab / M. Zamani, NSF’s NOIRLab / D. de Martin, NSF’s NOIRLab.

Astronomers Capture Ongoing Collision of Two Spiral Galaxies

Aug 9, 2022 by News Staff

Astronomers using the Gemini North telescope, one of the twin telescopes of the International Gemini Observatory, have captured a stunning image of a pair...

This artist’s conception shows the merger between a neutron star and another star (seen as a disk, lower left) which caused an explosion resulting in SGRB 211106A (white jet, middle), and left behind what astronomers now know to be one of the most luminous afterglows on record (semi-spherical shock wave mid-right); while dust in the host galaxy obscured most of the visible light (shown as colors), millimeter light from the event (depicted in green) was able to escape and reach ALMA. Image credit: ALMA / ESO / NAOJ / NRAO / M. Weiss, NRAO, AUI & NSF.

ALMA Looks at Neutron Star Merger in Millimeter Light

Aug 3, 2022 by News Staff

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have for the first time detected the millimeter afterglow of a short-duration...

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