Can dark matter be trans-Seaborg elements?

Click For Summary

Discussion Overview

The discussion explores the hypothesis that dark matter could consist of trans-Seaborg elements, which are theorized to exist beyond atomic number 126. Participants examine the implications of this idea in relation to the properties of dark matter, particularly its detection and interaction characteristics.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant questions whether dark matter could be composed of trans-Seaborg elements, referencing Seaborg's hypothesis of an "island of stability" for these elements.
  • Another participant argues that dark matter cannot consist of these elements because they are baryonic matter, which would interact with electromagnetic fields and emit radiation, unlike dark matter.
  • A further contribution highlights the baryon to photon ratio from big bang nucleosynthesis, suggesting that the amount of baryonic matter is insufficient to account for the observed dark matter, reinforcing the argument against super heavy elements as dark matter.

Areas of Agreement / Disagreement

Participants express disagreement regarding the possibility of trans-Seaborg elements being dark matter, with some asserting that they cannot be due to their baryonic nature and the implications of cosmological constraints.

Contextual Notes

The discussion does not resolve the broader implications of dark matter's composition or the nature of trans-Seaborg elements, leaving open questions about definitions and the stability of such elements.

squidsoft
Messages
56
Reaction score
0
Hello everyone.

May I ask if it's possible dark matter consists of trans-Seaborg elements beyond atomic number 126? Seaborg hypothesized that these elements were an "island of stability" and may be stable. Would we know enough of the chemical properties of such new elements to say that this cannot be dark matter?

Thanks,
 
Space news on Phys.org
Yes, we do know enough to say that they could not be dark matter. Dark matter is detected by gravitational effects and undetecable by emitted radiation - regaurless of the chemical properties of the super massive elements, they are still baryonic matter, and would still interact with electromagnetic fields and emit radiation. Dark matter does not, and thus, mostly is believed to contain no atoms, regaurdless of size.
 
Ok. Thank you.
 
In addition, due to the constraints of baryon to photon ratio from big bang nucleosynthesis, the maximum baryonic omega is only in the neighborhood of 0.04 or so, far below the 0.3 value for omega matter. Therefore, there has to be a decent amount of non-baryonic matter out there (in fact, there has to be quite a bit more non baryonic than baryonic), again eliminating super heavy elements as a possibility.
 

Similar threads

  • · Replies 1 ·
Replies
1
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 20 ·
Replies
20
Views
4K
  • · Replies 4 ·
Replies
4
Views
1K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 15 ·
Replies
15
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 264 ·
9
Replies
264
Views
24K