Keyword

astrophysics

2 papers tagged “astrophysics”

PhysicsNature · Jul 2024 Open access

Spectroscopic confirmation of two luminous galaxies at a redshift of 14

Stefano Carniani

Using JWST/NIRSpec observations from the JWST Advanced Deep Extragalactic Survey (JADES), the authors obtained spectroscopic confirmation of two unusually luminous galaxies, JADES-GS-z14-0 and JADES-GS-z14-1, at redshifts of about 14. These are among the most distant galaxies ever spectroscopically confirmed, existing roughly 290–300 million years after the Big Bang. Their brightness challenges pre-JWST models of how rapidly luminous galaxies could form in the early universe.

astrophysics cosmology early universe high-redshift galaxies

PhysicsThe Astrophysical Journal Letters · Apr 2019 Open access

First M87 Event Horizon Telescope Results. I. The Shadow of the Supermassive Black Hole

K. Akiyama

This is the first paper in the Event Horizon Telescope (EHT) series presenting the first image of a supermassive black hole, located at the center of the galaxy M87. Using global very long baseline interferometry at 1.3 mm, the collaboration resolved a bright ring of emission surrounding a central dark region, the black hole shadow. The observations are consistent with a Kerr black hole of mass about 6.5 billion solar masses.

black holes event horizon telescope vlbi m87