Seyfert galaxy - Wikipedia
WEBSeyfert galaxies are one of the two largest groups of active galaxies, along with quasar host galaxies. They have quasar-like nuclei (very luminous sources of electromagnetic radiation that are outside of our own galaxy) with very high surface brightnesses whose spectra reveal strong, high- ionisation emission lines , [ 1 ] but unlike quasars ...
Carl K. Seyfert - Wikipedia
WEBCarl Keenan Seyfert (February 11, 1911 – June 13, 1960) was an American astronomer. He is best known for his 1943 research paper on high-excitation line emission from the centers of some spiral galaxies, which are named Seyfert galaxies after him.
Seyfert galaxy | Active Nucleus, Supermassive Black Hole
WEBSeyfert galaxy, any of a class of galaxies known to have active nuclei. Such galaxies were named for the American astronomer Carl K. Seyfert, who first called attention to them in 1944. Two types are recognized.
Seyfert Galaxies - Harvard–Smithsonian Center for Astrophysics
WEBMar 18, 2008 · Seyfert galaxies are quite similar to normal galaxies like our own Milky Way except in one critical respect: their nuclei are fantastically bright -- in some instances as luminous as 100 billion suns. By contrast, the center of …
Seyfert Galaxies - NASA
WEBSeyfert Galaxies News & Articles See All News. Article. 2 Min Read. Supercomputing Reveals “Fossil Record” of Galaxy Collisions and Mergers. Multimedia Go To Galleries Go To Galleries Keep Exploring Discover More Topics From NASA Why NASA is studying flames in space Amendment 57: ROSES-24 Changes for 2 CFR 200 Update ...
3.2 Seyfert galaxies - OpenLearn
WEBIn 1943 the American astronomer Carl Seyfert (1911-1960) drew attention to a handful of spiral galaxies that had unusually bright point-like nuclei. Figure 12 shows NGC 4051, one of the first Seyfert galaxies to be identified.
Hubble Captures a Peculiar Pair - NASA Science
WEBMay 20, 2022 · This new NASA Hubble Space Telescope image of IC 4271, also known as Arp 40, is a curious pair of spiral galaxies some 800 million light-years away. The smaller galaxy is superimposed on the larger one, which is a type of active galaxy called a Seyfert galaxy. Seyfert galaxies are named for astronomer Carl K. […]
Hubble Views a Galaxy with More than Meets the Eye
WEBPowered by their active cores, Seyfert galaxies are an extremely energetic class of galaxies known as active galactic nuclei (AGNs). There are many different types of AGNs, but Seyfert galaxies are distinguished from other galaxies …
Seyfert’s Sextet - Science@NASA
WEBMar 22, 2008 · Known as Seyfert's Sextet, this intriguing group of galaxies lies in the head portion of the split constellation Serpens. The sextet actually contains only four interacting galaxies, though.
Seyfert Definition & Meaning - Merriam-Webster
WEBThe meaning of SEYFERT GALAXY is any of a class of spiral galaxies that have small compact bright nuclei characterized by variability in light intensity, emission of radio waves, and spectra —called also Seyfert.