Symbol T_H
is part of the quantity the equation computes from the expression on the right.
Read this term in its guide →Published equation contexts
Why this formula appears here
Staying cold is the second cost, and here the numbers run the other way. The Hawking temperature of Sagittarius A* at infinity is = /(8 GM)1.510^{-14}\, [ 10 ] . A static observer at radius r sees this blueshifted by the same Tolman factor that governs any locally measured temperature in a static spacetime, =/ [ 11 ] . Setting equal to a demanding but realistic dilution-refrigerator base temperature of 10\, and solving for the required clearance gives r2.810^{-14}\, — a few nuclear radii from the horizon. For a supermassive hole, in other words, the ambient Hawking bath…
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Symbol c^3
is one of the signed contributions combined to compute the quantity on the left.
Read this term in its guide →Symbol pi
pi is one of the signed contributions combined to compute the quantity on the left.
Read this term in its guide →Symbol G
G is one of the signed contributions combined to compute the quantity on the left.
Read this term in its guide →Symbol M
M is one of the signed contributions combined to compute the quantity on the left.
Read this term in its guide →Symbol k_B
is one of the signed contributions combined to compute the quantity on the left.
Read this term in its guide →Symbol K
K is one of the signed contributions combined to compute the quantity on the left.
Read this term in its guide →How to interpret it
Read it with the definitions, units, and assumptions supplied by the article.
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Published contexts (1)
A symbol can carry a different meaning in another article. Each occurrence keeps its own guide and term definitions.
Equation 71 · Evolutionary Physics
A Horizon Is a Toll Booth, Not a Loophole
This equation states an equality: the expressions on both sides have the same value under the article’s assumptions.
Staying cold is the second cost, and here the numbers run the other way. The Hawking temperature of Sagittarius A* at infinity is = /(8 GM)1.510^{-14}\, [ 10 ] . A static observer at radius r sees this blueshifted by the same Tolman factor that governs any locally measured temperature in a static spacetime, =/ [ 11 ] . Setting equal to a demanding but realistic dilution-refrigerator base temperature of 10\, and solving for the required clearance gives r2.810^{-14}\, — a few nuclear radii from the horizon. For a supermassive hole, in other words, the ambient Hawking bath…
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