Astronomy iron ratios in galaxy

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Homework Help Overview

The discussion revolves around the interpretation of [Fe/H] ratios in the context of metallicity in galaxies, specifically focusing on the implications of [element/Fe] ratios. Participants are exploring the significance of these ratios in astrophysics and nucleosynthesis processes.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to understand the role of iron in nucleosynthesis and its implications for heavier elements. Questions are raised about the processes involved in producing iron and the meaning of metallicity in astronomical terms.

Discussion Status

The discussion is ongoing, with participants sharing conjectures and seeking clarification on the role of iron in the context of galaxy metallicity. Some guidance has been offered regarding the definition of 'metals' in astronomy, but there is no explicit consensus on the main questions posed.

Contextual Notes

There is an acknowledgment that the forum is primarily for chemistry, which may limit the depth of astrophysical knowledge among participants. Additionally, the specific definitions and assumptions related to metallicity and nucleosynthesis are under discussion.

Puchinita5
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Homework Statement



I understand that [Fe/H] ratios can be used to describe metallicity in a galaxy... but I'm having trouble understanding what [element/Fe] ratios should tell you.

Anyone have an idea?

Homework Equations

The Attempt at a Solution

 
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Any conjecture? Is there anything special about Fe that might nave to do wth it?
 
Well, I'm assuming it has something to do with the fact that normal nucleosynthesis processes can't make elements past iron (nuclear fusion consumes rather than releases energy for heavier elements than iron, so the heavier elements are made in supernova or more energetic processes)

am i heading in the right direction?
 
How long does it take to produce iron?
 
Puchinita5 said:
am i heading in the right direction?

I really don't know for sure as I am not knowledgeable about astrophysics, but it sounds a reasonable conjecture, which will help you latch on when you hear the official explanation which I hope will come here.

As this forum is for chemistry and there isn't one specifically for astronomy homework, perhaps not everyone here knows that when astronomers say 'metals' they mean every element that is not H or He. :))
I just thought you might like to know. :)
 
Last edited:

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