GravPot16

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This web service allows to compute orbits for any given star, knowing its present position and 3D velocities. It is based on a Galactic gravitational potential driven by the Besançon Galaxy Model mass distribution. The details of the computation of this non-axisymmetric model are presented in Jose G. Fernandez-Trincado PhD thesis (2017). It includes a prolate bar potential which is close to the bar model described in Robin et al (2012) A&A 535, A106. This potential has already been used for orbit computations in a number of publications (see below).

Default parameters are the values taken in paper of the Gaia collaboration Helmi et al. (2018),A&A, 616, A12: Gaia Data Release 2. Kinematics of globular clusters and dwarf galaxies around the Milky Way. Users can instead use their own parameters for the bar, solar motion, Sun position, etc., as they want.

Input parameters for the objects for which to integrate orbit:

Input parameters for the Galaxy model:

Input parameters for the characteristics of the integration

The service provides 2 output files. The first contains the following parameters for the portion of orbit computed for the given integration time. Coordinates are given in the referential system of the Galaxy (*_inert) and in the referential of the bar (*_bar). Units are Gyr for time, kpc for distances and km/s for velocities:

The second file contains the orbit and values at a given time along the orbit. Coordinates are given in the referential system of the Galaxy (columns 3 to 8) and in the referential of the bar (columns 9 to 14):

We also give 2 images showing the orbit computed, points color-coded with the time, on the 3 projections XY, YZ, XZ.

You can access the form using the javascript client (on this page) or directly access to parameters in web service mode (a sample Python client program for using the web service can be downloaded).

References

GravPot16 Publications

  1. Gaia Collaboration, Smart, R. L. et al. 2021, A&A, 649, A6: Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars
  2. Minniti, D. et al. 2021, A&A, 648, A86: Survival in an extreme environment: Which is the closest globular cluster to the Galactic centre?
  3. Frelijj, H. et al. 2021, MNRAS, 503, 867-874: Searching for multiple populations in Ruprecht 106
  4. Kundu, R. et al. 2021, A&A, 645, A116: The search for extratidal star candidates around Galactic globular clusters NGC 2808, NGC 6266, and NGC 6397 with Gaia DR2 astrometry
  5. Fernández-Trincado, José G., et al. 2021, A&A, 648, A70: APOGEE spectroscopic evidence for chemical anomalies in dwarf galaxies: The case of M 54 and Sagittarius
  6. Fernández-Trincado, José G., et al. 2021, A&A, 647, A64: APOGEE discovery of a chemically atypical star disrupted from NGC 6723 and captured by the Milky Way bulge
  7. Fernández-Trincado, José G., et al. 2021, ApJ Letters, , A83: VVV CL001: Likely the Most Metal-poor Surviving Globular Cluster in the Inner Galaxy
  8. Fernández-Trincado, José G., et al. 2020, A&A, 644, A83: Jurassic: A chemically anomalous structure in the Galactic halo
  9. Fernández-Trincado, José G., et al. 2020, A&A, 643, L4: Aluminium-enriched metal-poor stars buried in the inner Galaxy
  10. Fernández-Trincado, José G., et al. 2020, A&A, 643, A145: The enigmatic globular cluster UKS 1 obscured by the bulge: H-band discovery of nitrogen-enhanced stars
  11. Fernández-Trincado, José G., et al. 2020, MNRAS, 495, 4113-4123: Dynamical orbital classification of selected N-rich stars with Gaia Data Release 2 astrometry
  12. Cadelano, M. et al. 2020, ApJ, 895, 1: Digging for Relics of the Past: The Ancient and Obscured Bulge Globular Cluster NGC 6256
  13. Lian, J. et al. 2020, MNRAS, 494, 2561: Age-chemical abundance structure of the Galaxy I: Evidence for a late accretion event in the outer disc at z∼0.6
  14. Tang, B., et al. 2020, ApJ, 891, 28: On the Chemical and Kinematic Consistency between N-rich Metal-poor Field Stars and Enriched Populations in Globular Clusters
  15. Salvadori, et al. 2019, MNRAS, 487, 4261: Probing the existence of very massive first stars
  16. Michele, B. et al. 2019, MNRAS, 490, 2588: Young stars raining through the galactic halo: the nature and orbit of price-whelan 1
  17. Carrera, R. et al. 2019, A&A, 627, A119: Extended halo of NGC 2682 (M 67) from Gaia DR2
  18. Villanova, S. et al. 2019, ApJ, 882, 174: Detailed Chemical Composition and Orbit of the Newly Discovered Globular Cluster FSR 1758: Implications for the Accretion of the Sequoia Dwarf Galaxy onto the Milky Way
  19. Kundu. R, et al. 2019, MNRAS, 489, 4565: The tale of the Milky Way globular cluster NGC 6362 – I. The orbit and its possible extended star debris features as revealed by Gaia DR2
  20. Fernández-Trincado, José G., et al. 2019, ApJ Letters, 886, L1: Discovery of a New Stellar Subpopulation Residing in the (Inner) Stellar Halo of the Milky Way
  21. Fernández-Trincado, José G., et al. 2019, A&A, 631, A97: Discovery of a nitrogen-enhanced mildly metal-poor binary system: Possible evidence for pollution from an extinct AGB star
  22. Fernández-Trincado, José G., et al. 2019, MNRAS, 488, 2864: Chemodynamics of newly identified giants with a globular cluster like abundance patterns in the bulge, disc, and halo of the Milky Way
  23. Fernández-Alvar, Emma, et al. 2019, MNRAS, 487, 1462: The metal-rich halo tail extended in z: a characterization with Gaia DR2 and APOGEE
  24. Tang, B. et al. 2018, ApJ, 871, 58: Chemical and Kinematic Analysis of CN-strong Metal-poor Field Stars in LAMOST DR3
  25. Simion, I. and Fernández-Trincado, Jose G., 2018, GBX2018: Orbital properties of the Bulge giants with Gaia DR2
  26. Minniti, D., et al. 2018, ApJ Letters, 869, L10: Discovery of Tidal RR Lyrae Stars in the Bulge Globular Cluster M62
  27. Gaia Collaboration, Helmi, A. et al. 2018, A&A, 616, A12: Gaia Data Release 2. Kinematics of globular clusters and dwarf galaxies around the Milky Way
  28. Schiappacasse-Ulloa, J. et al. 2018, AJ, 156, 94: A Chemical and Kinematical Analysis of the Intermediate-age Open Cluster IC 166 from APOGEE and Gaia DR2
  29. Contreras Ramos, R. et al. 2018, ApJ, 863, 78: The Orbit of the New Milky Way Globular Cluster FSR1716 = VVV-GC05
  30. Tang, B. et al. 2018, ApJ, 855, 38: The Metal-poor non-Sagittarius (?) Globular Cluster NGC 5053: Orbit and Mg, Al, and Si Abundances
  31. Libralato, M. et al. 2018, ApJ, 854, 45: The HST Large Programme on Omega Centauri. III. Absolute Proper Motion
  32. Fernández-Trincado, José G., et al. 2017, ApJ Letters, 846, L2: Atypical Mg-poor Milky Way Field Stars with Globular Cluster Second-generation-like Chemical Patterns
  33. Fernández-Trincado, José G., et al. 2017, SF2A-2017, 199: Abundance anomalies in red giants with possible extragalactic origins unveiled by APOGEE-2
  34. Fernández-Trincado, José G., et al. 2017, SF2A-2017, 193: New insights on the origin of the High Velocity Peaks in the Galactic Bulge
  35. Recio-Blanco et al. 2017, A&A Letters, 602, L14: The Gaia-ESO Survey: Low-alphaelement stars in the Galactic bulge
  36. Fernández-Trincado, José G., et al. 2016, ApJ, 833, 132: Discovery of a Metal-poor Field Giant with a Globular Cluster Second-generation Abundance Pattern
  37. Fernández-Trincado, José G., et al. 2016, MNRAS, 461, 1404: Close encounters involving RAVE stars beyond the 47 Tucanae tidal radius
  38. Fernández-Trincado, José G., et al. 2015, A&A, 583, A76: RAVE stars tidally stripped or ejected from the Omega Centauri globular cluster
  39. Fernández-Trincado, José G., et al. 2015, A&A, 574, A15: Searching for tidal tails around Omega Centauri using RR Lyrae stars

Disclaimer

Simulations are made at your own risks. The authors are not responsible for wrong applications of their model.

In case you would like complementary informations, you may contact the authors directly (modele[at]obs-besancon.fr).

Changes log

This is the first version of the Gravpot16 code (version described in J.G. Fernandez-Trincado et al, in prep)