I have been investigating astronomical reference system inversion effects for an article on astrophysics. I need to find examples of "shrunk space".
This would manifest itself as an increase in star counts per unit volume of space. It should be found at the center of large galaxies like the Milky Way and M87. Inversion effects would be accompanied by intense radio and infrared emission.
Stars are normally separated by a few light years. I am looking for examples where the interstellar distances are much less than expected, and preferably in the central portions of large galaxies.
Can anyone help?
For the Milky Way galaxy had you thought about using the Gaia data:
https://gea.esac.esa.int/archive/
Richard
The observed quantity astronomers use to define the light within a given radius or annulus of a galaxy is called surface brightness, a 2-D quantity. To determine the 3-D stellar density within a given radius or annulus requires a model since the light detected is the integrated light from the front to the back of a galaxy. The type of galaxies you seek are called high surface brightness (HSB) galaxies. These are found among spiral, normal elliptical, giant elliptical and compact dwarf elliptical galaxies. Some are luminous radio galaxies, some not. There is a very large volume of papers on these objects, as well as on low surface brightness (LSB) galaxies within these morphological types. There are also some HSB globular clusters found in other galaxies. BTW, the Milky Way is not an HSB by any measure. You very likely have a lot of reading to do to extract from data tables the kinds of objects of interest. Much of this data has been available since the mid 1990s.
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