My notes after first read (post corrections for Coleman I think).

karenlmasters commented 4 years ago

Introduction: Big picture - this is supposed to motivate the reason for this paper, and review what's known already. I don't think you need subsections - start from the fact that so many have spiral arms, then move to how several models exist, but tests have been challenging. Most of what you have in 1.2 right now can move to methods as a sort of intro to our pitch angle measurement method. Keep the last two paragraphs in that section for the end of the intro.

Other specific points in Intro:

If you are going to talk about tightness of arms and other galaxy properties you have to mention the classic Hubble sequence predictions (and Masters et al 2019).
"indicating that spirals exist for a long time or are continually rebuilt." -> "suggesting that spirals exist for a long time or are continually rebuilt."
"Stronger bulges and more more massive central black holes are both linked to more tightly wound spiral arms, albeit with large amounts of scatter." -> "Stronger bulges and more more massive central black holes have both been linked to more tightly wound spiral arms." (but we kind of didn't find this in Masters et al. 2019 right - so need to be careful).

Sample:

why did we exclude 1 arm? Maybe because that gives no measure of error on the pitch angle? Or was it because these are often tidal arms (e.g. Casteel et al. paper on how features depend on distance to nearest other galaxy).
I don't think Cauchy or HalfCauchy is in common use among astronomers. I don't know what this function means and I couldn't look up in 30s on Google.

Results:

I think this is a good summary, but needs a little more explanation for readers new to it. Just try to be really clear about single arm pitch angle, the fact that galaxies have multiple arms, so then to get a single pitch angle for a galaxy is harder etc.
Did Davis and Hayes give a number for interarm variation in pitch angle.
Write 11.0+/-0.9 (drop the second digit after decimal).

3.2 - lead in with a sentence on which model of spiral winding predicts uniform in cot thi to give some context for the test.

3.3.1 - again lead in with a line or two about models which predict correlations.

3.3.2 - is there a model predicting this? Maybe not, but there are predictions suggesting bars drive spirals, which could suggest a link - so lead in with something about that.

Discussion - repeat the summary of models which have been tested before leading into the results.

Can you tell how many galaxies might have been needed to reveal correlations? The ending paragraph is a bit too negative still, try to make it more positive. :)

karenlmasters commented 4 years ago

Overall this is pretty good though - close I would say, just a bit of rejigging and adding some bits to help the flow for the reader.

tingard commented 4 years ago

Big picture - this is supposed to motivate the reason for this paper, and review what's known already. I don't think you need subsections - start from the fact that so many have spiral arms, then move to how several models exist, but tests have been challenging.

Sure, could you clarify which bits you think are too much information? I've tried to create a narrative talking about galaxy population → possible formation mechanisms → possible factors driving evolution

Most of what you have in 1.2 right now can move to methods as a sort of intro to our pitch angle measurement method. Keep the last two paragraphs in that section for the end of the intro.

There's some evaluation of other pitch angle calculation methods here, does that belong in the method?

tingard commented 4 years ago

Will implement the other comments! Thanks :)

tingard commented 4 years ago

(e.g. Casteel et al. paper on how features depend on distance to nearest other galaxy).

I can't find this paper, do you have a link?

tingard commented 4 years ago

I don't think Cauchy or HalfCauchy is in common use among astronomers.

Ah okay, it's the same as the Student's T-distribution with one degree of freedom.

karenlmasters commented 4 years ago

https://ui.adsabs.harvard.edu/abs/2013MNRAS.429.1051C/abstract

On Thu, Apr 2, 2020 at 5:49 AM Tim Lingard notifications@github.com wrote:

(e.g. Casteel et al. paper on how features depend on distance to nearest other galaxy).

I can't find this paper, do you have a link?

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karenlmasters commented 4 years ago

Big picture - this is supposed to motivate the reason for this paper, and review what's known already. I don't think you need subsections - start from the fact that so many have spiral arms, then move to how several models exist, but tests have been challenging.

Sure, could you clarify which bits you think are too much information? I've tried to create a narrative talking about galaxy population → possible formation mechanisms → possible factors driving evolution

I'll give it another read and see if I can be more specific. Might find time later today, as (shockingly) I am already prepared for my class tomorrow.....

There's some evaluation of other pitch angle calculation methods here, does that belong in the method?

Yes I think that's fine in the method - as you are discussing how to measure pitch angles.

tingard commented 4 years ago

I think most of these have been addressed in the most recent commits!

tingard commented 4 years ago

Hopefully everything here has been addressed, I'm closing this issue

tingard / hierarchial-spiral-modelling-paper

My notes after first read (post corrections for Coleman I think). #2