Dark globular cluster

From the Science Archives, the open-project database of science information
Jump to navigation Jump to search
Observations with ESO’s Very Large Telescope in Chile have discovered a new class of “dark” globular star clusters around this galaxy. These are marked in red. Normal globulars are marked in blue and globulars showing similar properties to dwarf galaxies are in green.

Dark globular cluster is a proposed type of globular star clusters that has an unusually high mass for the number of stars within it. Proposed in 2015 on the basis of observational data, dark globular clusters are believed to be populated by objects with significant dark matter components, such as central massive black holes.[1]

Observational data[edit]

The observational data for dark globular clusters comes from the Very Large Telescope (VLT) in Chile which observed the vicinity of the galaxy Centaurus A.[2] Many of the globular clusters inside that galaxy are brighter and more massive than those orbiting the Milky Way and a sample of 125 globular clusters around Centaurus A was studied using the VLT's FLAMES instrument.[2] While globular clusters are normally considered to be almost devoid of dark matter,[2] the study of the dynamical properties of sampled clusters suggested the presence of exotically concentrated dark matter.[1] The study was published in The Astrophysical Journal(link). The existence of dark globular clusters would suggest that their formation and evolution are markedly different from other globular clusters in Centaurus A and the Local Group.[1]

References[edit]

  1. 1.0 1.1 1.2 Lua error in Module:Citation/CS1/Utilities at line 112: invalid value (table) at index 1 in table for 'concat'.
  2. 2.0 2.1 2.2 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).


Add your comment
The Science Archives welcomes all comments. If you do not want to be anonymous, register or log in. It is free.


As a reminder, article comments are only for discussions on how to improve the article. Please direct other comments to a user's talk page. Please be formal and do not use excessive uppercase. Please be advised you may receive an automatic block if you break the article comments policy. For information regarding what is acceptable/not acceptable in article comments, please message Icons-flag-ru.png Joey (talk), Natalia (talk), Icons-flag-fr.png ynoss (talk), or Icons-flag-ca.png Daniel (older account/talk).