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farr / AlignedVersusIsoSpin

A calculation and paper comparing aligned and isotropic black hole spin models.
MIT License
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Figure 6 #7

Closed ilyamandel closed 7 years ago

ilyamandel commented 7 years ago

Change $\bar{a}$ to $\bar{\chi}$ on upper abscissa label.

[Aside: figures 5 and 6 have first caption sentence in bold, but not the rest?]

SimonStevenson commented 7 years ago

All Nature figures should have the first sentence of the caption as a title of the figure, in bold. I can change the upper axis

SimonStevenson commented 7 years ago

Actually, on second thought, I'm not sure I agree with this comment. In Equation 1 we define \chi as "the corresponding dimensionless projections of the individual black hole (BH) spins". On this axis, I really mean the magnitude of the BH spin, which we denote in the paper as $a$ in e.g. Equation 1.

SimonStevenson commented 7 years ago

Ok, it seems Equation 1 has been changed from $a$ to $\chi$, so now the paper doesn't agree with itself ... we either use $\chi$ as the spin magnitude, or the projection, but not both.

SimonStevenson commented 7 years ago

I assume this was you @ilyamandel

farr commented 7 years ago

The current "setting" is that we use $a$ for the (dimensionless) spin magnitude, $\chi$ for the projection of the (dimensionless) spin vector onto the $\hat{z}$ axis, and $\chieff$ for the mass-weighted combination of each BH's $\chi$. So, I agree that $\bar{a}$ is correct for the meaning of your plot, and am therefore closing this issue.