HVC 127-41-330

Last updated
HVC 127-41-330
Interstellar cloud
High-velocity cloud
Observation data: J2000.0 [1] epoch
Right ascension 01h 05m [1]
Declination +21.8° [1]
Distance2,300,000  ly    (700,000 [2]   pc)
DesignationsHVC 127-41-331, HVC 128-41-329, HVC 127-42-352, HVC 127-41-330 [1]
See also: Lists of nebulae

HVC 127-41-330 is a high-velocity cloud in the constellation of Pisces. The three numbers that compose its name indicate, respectively, the galactic longitude and latitude, and velocity towards Earth in km/s. It is 20,000 light years in diameter and is located 2.3 million light years (700 kiloparsecs) from Earth, between M31 and M33. [2] This cloud of neutral hydrogen (detectable via 21 cm H-I emissions), unlike other HVCs shows a rotational component and dark matter. 80% of the mass of the cloud is dark matter. It is also the first HVC discovered not associated with the Milky Way galaxy or subgroup (subcluster).

Astronomer Josh Simon considers it a candidate for being a dark galaxy. [2] With its rotation, it may be a very low density dwarf galaxy of unused hydrogen (no stars), a remnant of the formation of the Local Group.

See also

References

  1. 1 2 3 4 "HVC 127-41-331". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 29 March 2018.
  2. 1 2 3 Josh Simon (2005). "Dark Matter in Dwarf Galaxies: Observational Tests of the Cold Dark Matter Paradigm on Small Scales" (PDF). Archived from the original (PDF) on September 13, 2006.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.