Cosmology View
My views on Cosmology and Physics
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Book by David Michalets
This is section 15 of 18.
The web page series for Distant Spectral Shifts is based on my book Cosmology Crisis Cleared.
The methods identified in NED for specific galaxies are charted. These methods were explained in previous sections. The methods used by the respective galaxies are plotted in charts.
15.1 Possible redshifts identified in NED spectra
An astronomer can select a shifted emission or absorption line based on a seriously bad assumption. These lines are always from atoms in the line of sight, so it is literally impossible for any of them to indicate a 3-dimensional velocity of the galaxy behind it, in the line of sight.
https://www.cosmologyview.com/NEDcap/Chart-NumberOfRS.png
When the spectrum contains no prominent absorption or emission lines, then the astronomer must use one of the distance calculations, based on luminosity. Those are the marks on the zero line.
Perhaps, a chart of each line per galaxy could be presented. This could add 1 page per line. It is easier for only the person interested to view the galaxy spreadsheet in the Data Set.
15.2 Using the H I line from neutral hydrogen
This emission line applies to only an atom and cannot indicate a galaxy's velocity. Unfortunately, many galaxies have that mistake.
https://www.cosmologyview.com/NEDcap/Chart-HI-AsVel.png
15.3 Using a metallic emission line
An emission line, from an atom in the line of sight, cannot indicate a galaxy's velocity. Unfortunately, many galaxies could have that mistake.
https://www.cosmologyview.com/NEDcap/Chart-MELA.png
The most distant galaxies lack a spectrum but have only a measured magnitude, which can be used to estimate its distance.
15.4 Distance Methods
An astronomer has several methods which are available to calculate a distance when having no redshift. NED, in its Distances tab, identifies the methods being used.
https://www.cosmologyview.com/NEDcap/Chart-NumberOfDM.png
Perhaps, a chart of each method per galaxy could be presented. This could add 1 page per method. It is easier for the person interested to view the galaxy spreadsheet in the Data Set.
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;ast update: 01/13/2022
