DLA0817g
   HOME

TheInfoList



OR:

DLA0817g, also known as the Wolfe Disk, is a galaxy located in the constellation Cancer, from Earth. Discovered in 2017 using observations made with the Atacama Large Millimeter Array (ALMA), it was studied with the Karl G. Jansky Very Large Array (JVLA) observatory and the
Hubble Space Telescope The Hubble Space Telescope (HST or Hubble) is a space telescope that was launched into low Earth orbit in 1990 and remains in operation. It was not the Orbiting Solar Observatory, first space telescope, but it is one of the largest and most ...
. It is a large rotating
disc galaxy A disc galaxy (or disk galaxy) is a galaxy characterized by a galactic disc. This is a flattened circular volume of stars that are mainly orbiting the galactic core in the same plane. These galaxies may or may not include a central non-disc-like ...
, with a mass of approximately 72 billion solar masses, dating back to an early age in the life of the universe, approximately 1.5 billion years after the
Big Bang The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. Various cosmological models based on the Big Bang concept explain a broad range of phenomena, including th ...
. This contradicts previous models that describe the formation and evolution of galaxies and that foresee a gradual and progressive increase in galactic dimensions. This galaxy has other characteristics that appear early compared to its age. Its rotational speed, approximately , is also comparable to that of a mature galaxy like our Milky Way galaxy. It is nicknamed the Wolfe Galaxy or the Wolfe Disc in honor of Arthur M. Wolfe, an American astrophysicist, one of the discoverers of the Sachs–Wolfe effect.


References

{{DEFAULTSORT:DLA0817g Cancer (constellation) Galaxies discovered in 2017