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One might quickly conclude that black holes don't belong on HR diagrams since the latter is designed for stars, and black holes generally aren't considered stars. Further, given that a spectral type would be necessary to plot any given entity on an HR diagram, a black hole would have to have such typification, which it does not have - given that, due to relativistic effects, it emits no significant light. If it were assigned a spectral type, it would still need to have an agreed-upon absolute magnitude, which some might argue was "infinite" for the same reason - reflecting the observer's inability to detect any (intrinsic) light. It is, however, generally accepted that black holes emit a kind of black-body radiation owing to quantum effects (Hawking radiation) for a temperature that may vary with its surface gravity. Even if a consensus could be built regarding its luminosity and its spectral type, its presence on an HR diagram may not be 'useful,' despite its significance in theories of stellar evolution to which the HR diagram so abundantly contributes.
Wiki User
∙ 8y ago
Wiki User
∙ 9y agoHardly. The HR diagram is based on radiation emitted by a star. A black hole is supposed to emit some radiation (the Hawking Radiation), but that would be so weak that it probably won't be detected for quite a while yet. In any case, fitting a black hole into a HR diagram would be irrelevant; it wouldn't give any useful information.
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Why are there no black holes or neutron stars on the H R diagram?
The Hertzsprung--Russell diagram is a scatter graph of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their spectral types or classifications and effective temperatures.Because the luminosity is low or non existent in the case of black holes, they do not appear on the HR diagram.
Why are there no black holes or neutron stars on the H-R diagram?
The Hertzsprung--Russell diagram is a scatter graph of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their spectral types or classifications and effective temperatures.Because the luminosity is low or non existent in the case of black holes, they do not appear on the HR diagram.
Where is absolute magnitude indicated on the HR diagram?
its located somewhere
Which part of the main sequence in the HR diagram contains the stars that took the longest to reach the main sequence?
The HR diagram does not reference stars on their way to the main sequence, only during or after.
The hr diagram graphs what 2 things?
The temperature and luminosity of stars.
Why are black dwarfs not on a HR diagram?
Black holes dont appear on HR diagrams because HR diagrams are used to classify stars not find black holes Black holes emit no visible light (are not luminous enough) and therefore do not appear in the HR diagram.
Why are there no black holes or neutron stars on the H R diagram?
The Hertzsprung--Russell diagram is a scatter graph of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their spectral types or classifications and effective temperatures.Because the luminosity is low or non existent in the case of black holes, they do not appear on the HR diagram.
Why are there no black holes or neutron stars on the H-R diagram?
The Hertzsprung--Russell diagram is a scatter graph of stars showing the relationship between the stars' absolute magnitudes or luminosities versus their spectral types or classifications and effective temperatures.Because the luminosity is low or non existent in the case of black holes, they do not appear on the HR diagram.
What are the colors of the HR Diagram?
The colors of the HR Diagram are:BlueBlue-WhiteYellowOrangeRed-OrangeRed
Why is the hr diagram important to scientist?
The main reason that the HR Diagram is so useful and important to scientists is, you can tell the size of the star by plotting it on the HR Diagram. The different sizes of stars form a pattern on the HR diagram.
Where are stars on the hr diagram?
The HR diagram contains only stars - so everywhere.
Why is there no neurton stars in the hr diagram?
Of course they are on the HR diagram. They are simply not on the main sequence.
What is the brightest star on the Hr diagram?
i don't know about the hr diagram but the brightest star known is r136a1
What chart show is the characteristics of a star?
HR diagram
What are the smallest stars in the HR diagram?
The red dwarves.
What part of the HR diagram are Red supergiant stars in?
Up at the top right. If you look on the Australian Telescope National facility website, their HR diagram shows this clearly.
Where is the Sun in the H-R diagram?
Our Sun is a G2V star and will thus appear in the centre of the HR diagram.
