meeting 2024 03 13 n57 - JacobPilawa/TriaxSchwarzschild_wiki_5 GitHub Wiki

Context

  • This bullet revists where we were leaving off with N57.

Diagnostics/Final Plots

Details/High Level Summary

  • High Level Details
    • D = 66.9 ± 2.9 (Jensen+2021) – this is 10 Mpc different from the previous distance measurement of 76.3 Mpc
    • GMOS PA: +41.0 E of N, Mitchell PA: +41.1;
    • GMOS PSF: Using Avg. weighted FWHM = 0.81"; Mitchell PSF: 0.5 (from N1453+N2693)
    • 215 GMOS bins (8 moments), 41 Mitchell bins (6 moments) = 256 total bins, 1966 total kinematic constraints
    • Also had done some preliminary sersic fits to determine R_core; could be interesting to revisit
    • Other Useful numbers:
      • 1+d_g = 2.3
      • nu_10 = 4.9
      • M_K = -25.75
      • PA_Kin_GMOS = 100 +/- 22
      • PA_Kin_mitchell = N/A
      • PA_Phot = 40.2 +/- 0.5
      • Psi = 59.3 +/- 22
And here is an exhaustive table of the different cubes we ran
Cube Name Date Summary
Cube A1 Feb 3, 2022 6d hypercube, with gNFW profile. A bit undersampled, seemed to miss minimum.
Cube A2 Feb 10, 2022 Submitted 1000 more models to cover higher black hole and higher halo region. Points chosen to have ~uniform density in the space.
Cube A1A2 Scaled Feb 22, 2022 Scalings. Scaled the 13 models above to 13 different scales between 0.9 and 1.1, giving ~26,000 models total.
Cube B March 1, 2022 Rejection sampled cube incorrectly built from 26,000 scaled models. ~1000 rejection sampled models. The error was in applying the "scale" to the models. Also scaled these models.
Cube B Prime March 15, 2022 Corrected the scaling issue from Cube B and ran ~1000 more models. Also scaled these models.
Cube C March 21, 2022 Rejection cube of 1000 models built from Cube A1A2 + Cube B Prime.
Lipka Tests March-April 2022 729 models at fixed masses, testing any effect of the Lipka m_eff on the shapes for N57.
Cube D May 17, 2022 Built another rejection sampled cube based on the 1sigma contours (instead of 2 sigma contours) to try to solve the issue bi-modality issue in Tmaj. Didn't seem to improve things that much.

Diagnostic Plots

Label Plot
Moment Maps + MGE Contours
Radial Profiles
Sigma Profile
V(R, Theta)
Nonbisymmetric Component
Environment Comparison*
  • Note that the nu10 environment has to be recomputed with updated distances as we have discussed. I don't think that the general trend should appreciably change, but wanted to be upfront with that plot.

Cornerplots

Cornerplots for a variety of different scale parameters, with a truncated Gaussian prior, also plotted in upq space
scale nu=0.5 nu=1.5
0.1
0.11
0.12
0.13
0.14
0.15
0.16
0.17
0.18
0.19
0.2

Remaining Work/Open Questions

  • The only major open question is how thoroughly we want to test the impact on the parameters if we mask a few of the bins near the GMOS/Mitchell boundary. We noticed that there was a slight systematic shift between these data (notably in the sigma profiles), and we had suggested re-computing a subset of the models to test masking these.

  • Here are some details and diagnostics on the problematic bins:

First, here are some plots without any masks applied.
GMOS Bin Map Kinematic Maps One-sided radial plot Two-sided radial plot
And lastly, here's what I think ends up looking the best -- this has the GMOS corners masked, as well as the two additional bins along the perimeter. I also masked the two innermost Mitchell bins, and this GREATLY improves how the radial profiles appear.
GMOS Bin Map Kinematic Maps One-sided radial plot Two-sided radial plot
  • And here, for reference, are all models within certain chi2 cutoffs for us to decide what to quickly recompute for this test (if we want):
1sigma (139 models) 2sigma (768 models) 3sigma (1722 models) 4sigma (3048 models)

References on Environment

LDC: Before and After Imposing Cuts
Key # No Cuts # With Cuts
n57 4 3
n1277 300 300
n1407 59 22
n1550 16 7
n1600 37 35
n3091 15 10
n3842 59 59
n4486 300 67
n4649 300 61
n4889 84 84
n5328 83 71
n5419 43 31
n5516 6 5
n6086 1 1
n7619 16 12
HDC: Before and After Imposing Cuts
Key # No Cuts # With Cuts
n57 1 1
n1277 117 117
n1407 42 12
n1550 15 6
n1600 16 15
n3091 7 5
n3842 42 42
n4486 205 45
n4649 205 41
n4889 49 49
n5328 6 5
n5419 32 22
n5516 6 5
n6086 1 1
n7619 12 10
gal ra dec d k av mk mbh (1e9 Msun) mbh/distance ref.
NGC0057 3.8787 17.3284 66.9 8.68 0.212 -25.47 5.5 this work
NGC1277 49.96454 41.5735 71.0 9.81 0.452 -24.50 4.9 ± 1.6 https://ui.adsabs.harvard.edu/abs/2016ApJ...817....2W/abstract
NGC1407 55.04941 -18.5801 28.1 6.70 0.187 -25.56 5.50 ± 1.58 https://ui.adsabs.harvard.edu/abs/2023arXiv230915911M/abstract
NGC1550 64.90802 2.40946 51.6 8.77 0.365 -24.83 3.7(3.3, 4.1) https://ui.adsabs.harvard.edu/abs/2013AJ....146...45R/abstract
NGC1600 67.91642 -5.0863 64.0 8.04 0.118 -26.00 17± 1.5 https://www.nature.com/articles/nature17197
NGC3091 150.0595 -19.6369 51.3 8.09 0.119 -25.47 3.6(3.4, 3.7) https://ui.adsabs.harvard.edu/abs/2013AJ....146...45R/abstract
NGC3842 176.0090 19.9498 98.0 9.08 0.059 -25.88 9.7(7.2,12.7) https://ui.adsabs.harvard.edu/abs/2011Natur.480..215M/abstract
NGC4486 187.7059 12.3911 16.8 5.81 0.063 -25.32 5.37(+0.37,-0.25)±0.22 https://iopscience.iop.org/article/10.3847/2041-8213/acbbcf
NGC4649 190.9167 11.5526 15.7 5.74 0.072 -25.25 4.5 ± 1.0 https://ui.adsabs.harvard.edu/abs/2010ApJ...711..484S/abstract
NGC4889 195.0338 27.9770 103.0 8.41 0.026 -26.66 21(6–37) https://ui.adsabs.harvard.edu/abs/2011Natur.480..215M/abstract
NGC5328 208.2221 -28.4894 64.1 8.49 0.171 -25.56 1.63 ± 0.89 https://ui.adsabs.harvard.edu/abs/2023arXiv230915911M/abstract: note that in Rusli+13, this had a BH ~3x as large; also the distance in the survey paper differs by a factor of 2 compared to the distance listed in the BH paper
NGC5419 210.9113 -33.9782 56.2 7.52 0.199 -26.25 7.2(+2.7,-1.9) https://ui.adsabs.harvard.edu/abs/2016MNRAS.462.2847M/abstract
NGC5516 213.9778 -48.1148 58.4 8.31 0.557 -25.58 2.50 ± 0.53 https://ui.adsabs.harvard.edu/abs/2023arXiv230915911M/abstract: same situation as NGC5328
NGC6086 243.1480 29.4847 138.0 9.97 0.105 -25.74 3.6(+1.7,−1.1) https://ui.adsabs.harvard.edu/abs/2011ApJ...728..100M/abstract
NGC7619 350.0605 8.20625 51.5 8.03 0.224 -25.55 3.25 ± 1.40 https://ui.adsabs.harvard.edu/abs/2023arXiv230915911M/abstract
⚠️ **GitHub.com Fallback** ⚠️