Dark energy and the CMB cold spot

In summary, two recent papers were published about infrared all sky surveys by WISE and 2MASS, which support the existence of the CMB cold spot. The possibility of large voids affecting dark energy models has been a topic of discussion in the literature for the past decade. This raises questions about the validity of papers like "Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae", which challenges the need for dark energy. However, the connection to the Lemaitre-Tolman-Bondi model is still unclear.
  • #1
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Two papers went up today regarding infrared all sky surveys by WISE and 2MASS that affirm the CMB cold spot - http://arxiv.org/abs/1405.1555, A Supervoid Imprinting the Cold Spot in the Cosmic Microwave Background; http://arxiv.org/abs/1405.1566, Detection of a Supervoid Aligned with the Cold Spot of the Cosmic Microwave Background. The effect of large voids on dark energy models has been discussed in the literature for the last decade. Does this lend credence to papers like http://arxiv.org/abs/0712.0370, Local Void vs Dark Energy: Confrontation with WMAP and Type Ia Supernovae; a heavily cited paper that questions the need for dark energy?
 
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  • #2
interesting articles, however I'm not familiar enough with the MV model to draw any connection
 
  • #3
The Lemaitre-Tolman-Bondi model is a central issue here, IMO.
 

Related to Dark energy and the CMB cold spot

1. What is dark energy and why is it important to study?

Dark energy is a theoretical form of energy that is believed to make up approximately 70% of the universe. It is responsible for the accelerated expansion of the universe and plays a crucial role in shaping the structure and evolution of the universe. Studying dark energy can help us understand the fundamental laws of physics and the fate of the universe.

2. What is the CMB cold spot and why is it significant?

The CMB (Cosmic Microwave Background) cold spot is a large, unusually cold region of the cosmic microwave background radiation, which is the leftover radiation from the Big Bang. It is significant because it challenges our current understanding of the universe's evolution and raises questions about the validity of the standard model of cosmology.

3. How is dark energy related to the CMB cold spot?

There is no direct evidence linking dark energy to the CMB cold spot. However, some scientists believe that the cold spot could be a result of the influence of dark energy on the expansion of the universe. Other theories suggest that the cold spot could be a remnant of a collision with a parallel universe or a supervoid, an area of the universe with a significantly lower density of matter.

4. How do scientists study dark energy and the CMB cold spot?

Scientists use various methods to study dark energy, including measuring the expansion rate of the universe, studying the distribution of galaxies, and observing the effects of gravitational lensing. As for the CMB cold spot, scientists use data from satellites and ground-based telescopes to study its properties, such as its size, shape, and temperature, and analyze its potential causes.

5. What are the implications of our understanding of dark energy and the CMB cold spot for the future?

Understanding dark energy and the CMB cold spot is crucial for our understanding of the universe and its evolution. It can also have implications for future cosmological models and technologies, such as space travel and potential methods for harnessing dark energy. Furthermore, studying these phenomena can help us answer fundamental questions about the nature of the universe and our place in it.

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