Update to Maxwellian kicks; new log normal (Disberg&Mandel 2025) kicks

[ilyamandel]

• The MAXWELLIAN NS CCSN kick changed from the Hobbs value of 265 km/s to 217 km/s based on 48 younger than 10 Myr pulsars with proper motions from Disberg & Mandel (2025) sample; corrects Hobbs+ 2005 missing Jacobian
• Implemented a LOGNORMAL NS CCSN kick magnitude distribution based on Disberg & Mandel, 2025

[jeffriley]

All good from me - approved

[SimonStevenson]

I know this has been merged already, but here is my test plot. Made using a population of single stars.

./COMPAS --mode SSE -n 50000 --kick-magnitude-distribution MAXWELLIAN --initial-mass-min 8.0 --initial-mass-max 30.0

and

./COMPAS --mode SSE -n 50000 --kick-magnitude-distribution LOGNORMAL --initial-mass-min 8.0 --initial-mass-max 30.0

[ilyamandel]

Thank you, @SimonStevenson !

Your plots are consistent with the curves used when making the fits (attached).

One caveat is that Disberg & Mandel (2025) recommend cutting off the distribution at 1000 km/s. We don't currently do this in the COMPAS code. @pauldisberg -- should we add that cut?

[pauldisberg]

@ilyamandel Yes, I think adding the cut would be a good idea, because (1) kicks above 1000 km/s are not really expected based on SN simulations, (2) we don't find any pulsar with a maximum likelihood velocity above 1000 km/s, and (3) the log-normal part above 1000 km/s is relatively small anyway.

[ilyamandel]

@pauldisberg -- OK, I'll add that cut in a future update.

[ilyamandel]

Actually, just posted the fix now, before I forget -- see #1405 .