What is Stellar Flux and How Does it Affect Solar Wind?

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Discussion Overview

The discussion revolves around the concept of Stellar Flux, its definition, and its relationship to solar wind. Participants explore the terminology and implications of stellar flux in the context of radiation and luminosity, as well as its relevance to apparent magnitude.

Discussion Character

  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant seeks clarification on the definition of Stellar Flux, expressing difficulty in finding information.
  • Another participant suggests that Stellar Flux is synonymous with "radiant flux," referring to the total power emitted from a source.
  • A different participant elaborates that stellar flux is the energy of radiation emitted by a star per second through a unit area, noting its measurement in specific bands of electromagnetic radiation.
  • This participant also mentions that stellar flux is related to radiative flux density and irradiance, and that it can be summed over a spherical area to determine the total power or luminosity of the source.
  • They connect stellar flux to apparent magnitude, indicating it relates to how much energy arrives from stars at Earth's surface.
  • Another participant points out potential ambiguity in the term "stellar" in the context of solar wind, referencing existing discussions on the topic.

Areas of Agreement / Disagreement

Participants express differing views on the complexity of terminology related to starlight and the definition of stellar flux. There is no consensus on the implications or interpretations of the term as it relates to solar wind.

Contextual Notes

The discussion highlights potential ambiguities in terminology and the need for clarity regarding the relationship between stellar flux and solar wind. Some definitions and concepts may depend on specific contexts or assumptions that are not fully resolved.

EpicAll Rounder
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I have a little problem about Stellar Flux. I've searched google and bing for info but to no avail. Please help me understand Stellar Flux.

Thanks, Epicall Rounder
 
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Offhand I would say it's what's known as "radiant flux", which is the total power emitted from a source.
 
First of all, let me just say that in my personal opinion the nomenclature related to starlight is needlessly complicated and in need of trimming.

Anyway, stellar flux is the energy of radiation emitted by the star passing every second through a unit area. It is usually measured in a given band of EM radiation.

It's the same as radiative flux density or radiation flux if taken over all wavelengths and the same as irradiance if the area is a surface area.
If summed over a spherical area encompassing the source it gives the total power (luminosity) of the source. Luminosity over all bands is called bolometric luminosity.

Stellar flux features in the calculations for apparent magnitude, since what you're comparing there is how much energy arrives per unit time from stars at the surface of the Earth (i.e., how bright they look) versus reference flux.

I hope I got that right.Now this seems kinda relevant:
 
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There are (closed) threads here at PF and much to be googled on Flux of Solar Wind. So there could some ambiguity with the term stellar in the OP question.
 

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