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Mad Arab
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How interested would astrophysicists be in being able to readily find concentrated sources of pristine material from just after the Big Bang in our galaxy?
Mad Arab said:How interested would astrophysicists be in being able to readily find concentrated sources of pristine material from just after the Big Bang in our galaxy?
Mad Arab said:Anyway, what I was thinking was that if the same processes of stellar formation took place in that population then we should have a certain number of brown dwarves being formed then.
Presumably some of them should remain in our galaxy either as part of its original population or from outside components that were incorporated into it. They would necessarily be very faint because of their age, but they would be distinguishable from other brown dwarves by their temperature (between 250 and 350K if my initial calculations are correct) and thus by the wavelength they should be searched for (between 5 and 15 um).
Chronos said:It's very doubtful any pop III stars remain in our neighborhood. You must consider they would be in excess of 10 billion years old by now. Unless much less massive than our local favorite, they've already done the nova thing. And if they are much less massive, they will be too faint to study spectroscopically.
Chronos said:I would think it is entirely possible the MW originated from primordial material.
I agree. It is nearly certain galaxies the size of MW are the product of mergers. The best chance of finding any relatively primordial stars is in the halo, or nearby dwarf galaxies. Unfortunately, stars there are distant and difficult to resolve.SpaceTiger said:It is, but it's also possible it wasn't. The bottom-up galaxy formation scenario would imply that smaller galaxies would have formed first, possibly polluting the intergalactic medium before the MW showed up on the scene.
Mad Arab said:SpaceTiger, yes stars of any mass could form from that material (though very massive ones are the ones most commonly discussed). The point is that for medium and low-mass brown dwarves that material will remain undisturbed thus preserving important information about the state of the interstellar medium from its earliest times.
Mad Arab said:You would still have to extrapolate for the star's turning hydrogen into helium. Plus, you'd be completely missing any evidence of primordial deuterium, he3 and lithium.
Local pristine primordial material refers to the raw, untouched substances and elements found on or near Earth that have not been altered or contaminated by human activity. It can include natural resources like water, air, minerals, and organic matter.
Scientists study local pristine primordial material through various methods, including direct observation, sample analysis, and remote sensing. They may also use specialized equipment and techniques to extract and analyze samples from different environments.
Local pristine primordial material is important because it provides valuable insights into the early formation and evolution of our planet. It can also help us understand the impact of human activity on the environment and inform conservation efforts.
Local pristine primordial material can be found in a variety of environments, such as remote areas, bodies of water, and underground. It can also be found in samples collected from space missions to other planets and celestial bodies.
Examples of local pristine primordial material include deep-sea sediments, polar ice cores, and ancient rocks. Other examples may include untouched forests, bodies of water, and untouched soil samples.