gravitational wave event GW170817 in August, the appearance of this fading dot quickly became of historic importance. It pinpointed GW170817's exact location, thereby enabling humanity's major telescopes to examine the first ever electromagnetic wave counterpart to a gravitational wave event, an event giving strong evidence of being a short gamma-ray burst kilonova, the element-forming explosion that occurs after two neutron stars merge. The featured image of lenticular galaxy NGC 4993 by Hubble shows the fading dot several days after it was discovered. Analyses, continuing, include the physics of the explosion, what heavy elements formed, the similarity of the speeds of gravitational radiation and light, and calibrating a new method for determining the distance scale of our universe.
More on GW170817:
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture Of the Day
Publications with keywords: neutron star - gravitational radiation
Publications with words: neutron star - gravitational radiation
- Fifty Gravitational Wave Events Illustrated
- GW190521: Unexpected Black Holes Collide
- A Hotspot Map of Neutron Star J0030s Surface
- Unusual Signal Suggests Neutron Star Destroyed by Black Hole
- Simulation: Two Black Holes Merge
- The Lonely Neutron Star in Supernova E0102 72.3
- GW170817: A Spectacular Multiradiation Merger Event Detected