Maverick's comments

[gusbeane]

1. Adding percentage to figure 6's legend
   On the text, it uses percentages (e.g. at the abstract and the end of 4.3 "5% is necessary") whereas the figure's legend only shows the surface density of gas. I think adding percentages in the figure 6's legend can be beneficial to the readers. It is easy to misunderstand that "5" in figure 6 means 5%, especially when skimming. Adding percentages next to the surface density values would reduce such chances.

2. Adding figure 2's content to figure 9
   I think adding figure 2's information on the background of figure 9 makes it easy for readers to compare them visually; otherwise readers have to go back and forth or screenshot them.

3. Adding grid lines to figures, especially figure 3
   It is very noticeable that the orange line of the upper panel of figure 3 seems to be very linear & flat after 1 Gyr. However, it is a bit hard to see if it is almost constant or slowly changing because of the nature of the figure. One of the journal club members said it can be a good idea to put a grid there. I think some other figures might be happy to have grids too :)

4. Positions of the definitions of R_{CR} and R_b
   The definition of R_{CR} is on the 1st page's footnote and that of R_b is in the section 2.3.
   I think you can mention the definition of R_b shortly in the footnote together.

5. Definition of the pattern speed
   Pattern speed in the paper is described to be measured with \mathcal{R} = R_{CR}/R_b, but at the same time later sections call Ω_p as the pattern speed, which would be an angular velocity of the pattern but it seems it is not mentioned in detail in the text.
   I think it can be beneficial to give a short description what Ω_p is, and distinguish it from \mathcal{R}; i.e. when you mean "pattern speed", should we interpret it as \mathcal{R} or Ω_p? My understanding is that Ω_p is the "pattern speed" and \mathcal{R} is the "criteria" to see if a pattern speed is fast or slow.