New red dwarf count and He-4 abundance

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SUMMARY

The recent estimates by van Dokkum and Conroy regarding the number of red dwarf stars in the universe suggest that the helium-to-hydrogen (He/H) ratio may not be significantly affected, as the current helium abundance estimate stands at 24%. The discussion highlights that even a substantial increase in low-mass stars, such as red dwarfs, does not alter the He/H ratio sufficiently to challenge the Lambda Cold Dark Matter (LCDM) model. The implications of these findings indicate that the mass tied up in red dwarfs does not contribute to a lower He/H ratio, as previously speculated.

PREREQUISITES
  • Understanding of stellar nucleosynthesis
  • Familiarity with the Lambda Cold Dark Matter (LCDM) model
  • Knowledge of helium abundance in astrophysics
  • Basic concepts of red dwarf star characteristics
NEXT STEPS
  • Research the implications of red dwarf star population estimates on cosmic helium abundance
  • Study the principles of stellar nucleosynthesis and its impact on elemental ratios
  • Examine the Lambda Cold Dark Matter (LCDM) model and its predictions
  • Explore current methodologies for estimating stellar populations in the universe
USEFUL FOR

Astronomers, astrophysicists, and researchers interested in stellar evolution, cosmic abundance of elements, and the implications of red dwarf stars on cosmological models.

TrickyDicky
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Does the new estimate on the number of red dwarf stars in the universe suggest a different proportion of He/H? (current helium abundance estimate is 24%)
Would it be lower since more mass would be tied up in low-mass stars (like red dwarfs) in which He/H<0.24.?
If not, how many more times should the number of low-mass stars be increased to have some influence on the proportion He/H of the universe?

New estimate by van Dokkum and Conroy:
http://arxiv.org/pdf/1009.5992v1
http://www.universetoday.com/80955/red-dwarf-discovery-changes-everything/
http://www.nytimes.com/2010/12/02/science/space/02star.html?_r=1&ref=science
 
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Bah, how many red dwarfs do you need to disprove the LCDM model? Hint - vast numbers of red dwarf stars do not do the trick any more than even more vast numbers of brown dwarfs previously postulated. Optical peaks in the CMB have long since ruled out these conjectures.
 
Chronos said:
Bah, how many red dwarfs do you need to disprove the LCDM model? Hint - vast numbers of red dwarf stars do not do the trick any more than even more vast numbers of brown dwarfs previously postulated. Optical peaks in the CMB have long since ruled out these conjectures.

My question was specific enough not to be answered with doctrine, but rather with current knowledge about stellar helium nucleosynthesis.
 

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