Astrophysics (Index)About

cold spot

(CMB cold spot, WMAP cold spot)
(unusually colder spot in the CMB)

A cold spot (or cosmic microwave background cold spot or WMAP cold spot) is an area of the celestial sphere where the CMB indicates a slightly lower black body temperature than the rest, a difference on the order of 70 millionths of a kelvin. The CMB black body temperature has a random distribution around a specific value (about 2.72548 K) except for this region. There has been some investigation regarding whether the apparent colder region corresponds to a void or voids in that direction, e.g., from the Sachs-Wolfe effect.


(CMB)
Further reading:
http://en.wikipedia.org/wiki/CMB_cold_spot
https://ned.ipac.caltech.edu/level5/March03/Lineweaver/Lineweaver7_6.html
https://ui.adsabs.harvard.edu/abs/2017MNRAS.470.2328M/abstract
Coordinates:cold spot
031505-193502

Referenced by pages:
topological defect

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