Testing the robustness of DYNAMITE triaxial Schwarzschild modelling: The effects of correcting the orbit mirroring
Journal
Date Issued
2022
Author(s)
Thater, Sabine
•
Jethwa, Prashin
•
Tahmasebzadeh, Behzad
•
Zhu, Ling
•
den Brok, Mark
•
Santucci, Giulia
•
Ding, Yuchen
•
Poci, Adriano
•
Lilley, Edward
•
Tim de Zeeuw, P.
•
Zocchi, Alice
•
Maindl, Thomas I.
•
•
Yang, Meng
•
Fahrion, Katja
•
van de Ven, Glenn
Abstract
In the past 15 yr, the triaxial Schwarzschild orbit-superposition code developed by van den Bosch and van de Ven in Leiden has been widely applied to study the dynamics of galaxies. Recently, a bug was reported in the orbit calculation of this code, specifically in the mirroring procedure that is used to speed up the computation. We have fixed the incorrect mirroring in the DYNAMITE code, which is the publicly-released successor of the Leiden triaxial Schwarzschild code. In this study, we provide a thorough quantification of how this bug has affected the results of dynamical analyses performed with this code. We compare results obtained with the original and corrected versions of DYNAMITE, and discuss the differences in the phase-space distribution of a single orbit and in the global stellar orbit distribution, in the mass estimate of the central black hole in the highly triaxial galaxy PGC 46832, and in the measurement of intrinsic shape and enclosed mass for more than 50 galaxies. Focusing on the typical scientific applications of the Schwarzschild method, in all our tests we find that differences are negligible with respect to the statistical and systematic uncertainties. We conclude that previous results with the Leiden triaxial Schwarzschild code are not significantly affected by the incorrect mirroring....
Volume
667
Start page
A51
Issn Identifier
0004-6361
Ads BibCode
2022A&A...667A..51T
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
Dynamite_paper.pdf
Description
pdf editoriale
Size
5.09 MB
Format
Adobe PDF
Checksum (MD5)
8093d2270e2b3ec5499ba8dfb01a9755