Tag Archive for 'Merger'

This unusual celestial object, as seen by the NASA/ESA Hubble Space Telescope, is actually a combination of two lenticular galaxies, NGC 2292 and NGC 2293. Image credit: NASA / ESA / Hubble / W. Keel, University of Alabama.

Hubble Sees Collision of Two Lenticular Galaxies

Nov 3, 2020 by Enrico de Lazaro

Two massive lenticular galaxies, NGC 2292 and NGC 2293, approached one another too closely in the distant past, gravity causing them to affect each other...

This Hubble image shows NGC 34, a spiral galaxy located 271 million light-years away in the constellation of Cetus. Image credit: NASA / ESA / Hubble / A. Adamo et al.

Hubble Space Telescope Looks at NGC 34

Oct 26, 2020 by Enrico de Lazaro

The NASA/ESA Hubble Space Telescope has taken a beautiful picture of the unusual spiral galaxy NGC 34. This Hubble image shows NGC 34, a spiral galaxy...

This X-ray image, taken by NASA’s Chandra X-ray Observatory, shows GW170817. The central panel shows the stacked image of the field, with total exposure of 783 ks. The position of GW170817 is marked. In addition, several X-ray point sources as well as extended diffuse X-ray emissions are visible. The image stamps are centered on the location of GW170817, showing the main phases of its evolution. Image credit: Troja et al., doi: 10.1093/mnras/staa2626.

Astronomers Detect Prolonged X-Ray Emission from Neutron-Star Merger

Oct 14, 2020 by News Staff

In 2017, astronomers detected a gravitational-wave signal, designated GW170817, from the merger of two neutron stars. And since the detection, they have...

An artist’s impression of binary black holes about to collide. Image credit: Mark Myers, ARC Centre of Excellence for Gravitational Wave Discovery (OzGrav), Australian National University.

Astronomers Witness Birth of Intermediate-Mass Black Hole

Sep 2, 2020 by News Staff

Astronomers using the twin LIGO detectors located in Livingston, Louisiana, and Hanford, Washington, and the Virgo detector located near Pisa, Italy, have...

SDSS J141637.44+003352.2, a dual quasar at a distance for which the light reaching us was emitted 4.6 billion years ago. The two quasars are 13,000 light-years apart on the sky, placing them near the center of a single massive galaxy that appears to be part of a group, as shown by the neighboring galaxies in the left panel. In the lower panels, optical spectroscopy has revealed broad emission lines associated with each of the two quasars, indicating that the gas is moving at thousands of kilometers per second in the vicinity of two distinct supermassive black holes. The two quasars are different colors, due to different amounts of dust in front of them. Image credit: Silverman et al, doi: 10.3847/1538-4357/aba4a3.

Astronomers Find Three Luminous Dual Quasars

Aug 27, 2020 by News Staff

Using the Subaru Telescope and W. M. Keck and Gemini observatories, astronomers have spotted three dual quasars — merging galaxy systems that have...

This Hubble image shows the barred spiral galaxy NGC 1614. The color image is made up of observations from Hubble’s Wide Field Camera 3 (WFC3) and Advanced Camera for Surveys (ACS) in the near-infrared and optical parts of the spectrum. Four filters were used to sample various wavelengths. The color results from assigning different hues to each monochromatic image associated with an individual filter. Image credit: NASA / ESA / Hubble / A. Adamo.

Hubble Snaps Image of Distorted Spiral Galaxy: NGC 1614

Aug 10, 2020 by News Staff

The NASA/ESA Hubble Space Telescope has delivered an unrivalled snapshot of the highly distorted barred spiral galaxy NGC 1614. This Hubble image shows...

The afterglow of GRB 181123B (marked with a circle), captured by the Gemini-North telescope. Image credit: Gemini Observatory / NOIRLab / NSF / AURA / K. Paterson & W. Fong, Northwestern University / Travis Rector, University of Alaska Anchorage / Mahdi Zamani / Davide de Martin.

Short Gamma-Ray Burst Localized to Extremely Distant Galaxy

Jul 16, 2020 by News Staff

An international of astronomers has observed an optical afterglow of a short gamma-ray burst, thought to be from the merger of two neutron stars, and localized...

Stellar streams arcing high over the Milky Way Galaxy are remnants of accreted dwarf galaxies and star clusters. Image credit: NASA / JPL-Caltech / R. Hurt, SSC & Caltech.

Astronomers Find Stellar Stream of Extragalactic Origin in the Vicinity of the Sun

Jul 9, 2020 by Enrico de Lazaro

A team of astronomers from Israel and the United States has discovered a vast stream of 250 stars of extragalactic origin in the vicinity of our Solar...

An artist’s rendition of a mystery compact object in ‘mass gap’ found by LIGO and Virgo gravitational wave detectors. Image credit: LIGO / Caltech / MIT / R. Hurt, IPAC.

GW190814 Sheds Light on Mass Gap between Neutron Stars and Black Holes

Jun 25, 2020 by News Staff

The gravitational-wave signal GW190814, detected on August 14, 2019 by NSF’s Laser Interferometer Gravitational-Wave Observatory (LIGO) and the Virgo...

This artist’s impression illustrates how high-speed jets from supermassive black holes would look. Image credit: NASA / ESA / Hubble / L. Calçada, ESO.

Astronomers Observe Relativistic Jet from Two Merging Spiral Galaxies

Apr 8, 2020 by News Staff

Astronomers using the 8.2-m Subaru Telescope report the first unambiguous detection of a relativistic jet — a beam of charged particles that travels...

An artist’s impression of two white dwarfs in the process of merging; depending on the combined mass, the system may explode in a thermonuclear supernova, or coalesce into a single heavy white dwarf, as with WD J0551+4135. Image credit: Mark Garlick / University of Warwick.

Astronomers Spot Ultra-Massive White Dwarf with Unique Atmosphere

Mar 3, 2020 by News Staff

Astronomers have discovered an ultra-massive white dwarf with a unique carbon-hydrogen mixed atmosphere. Named WD J055134.612+413531.09 (WD J0551+4135...

This Hubble image shows Messier 104. Image credit: NASA / ESA / Hubble Heritage Team / STScI / AURA.

Strikingly Metal-Rich Halo of Messier 104 Suggests Turbulent Past

Feb 21, 2020 by News Staff

Messier 104, a lenticular galaxy located 28 million light-years away in the constellation Virgo, now has a new chapter in its story — an extended...

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