Modelling the Tucana III stream - a close passage with the LMC

Journal Article · Tue Dec 11 00:00:00 EST 2018 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/sty2518· OSTI ID:1479691

Erkal, D. ^[1]; Li, T. S. ^[2]; Koposov, S. E. ^[3]; Belokurov, V. ^[4]; Balbinot, E. ^[5]; Bechtol, K. ^[6]; Buncher, B. ^[7]; Drlica-Wagner, A. ^[8]; Kuehn, K. ^[9]; Marshall, J. L. ^[10]; Martínez-Vázquez, C. E. ^[11]; Pace, A. B. ^[10]; Shipp, N. ^[12]; Simon, J. D. ^[13]; Stringer, K. M. ^[10]; Vivas, A. K. ^[11]; Wechsler, R. H. ^[14]; Yanny, B. ^[8]; Abdalla, F. B. ^[15]; Allam, S. ^[8] ; Annis, J. ^[8]; Avila, S. ^[16]; Bertin, E. ^[17]; Brooks, D. ^[18]; Buckley-Geer, E. ^[8]; Burke, D. L. ^[19]; Rosell, A. Carnero ^[20]; Kind, M. Carrasco ^[21]; Carretero, J. ^[22]; D’Andrea, C. B. ^[23]; da Costa, L. N. ^[20]; Davis, C. ^[24]; De Vicente, J. ^[25]; Doel, P. ^[18]; Eifler, T. F. ^[26]; Evrard, A. E. ^[27]; Flaugher, B. ^[8]; Frieman, J. ^[2]; García-Bellido, J. ^[28]; Gaztanaga, E. ^[29]; Gerdes, D. W. ^[27]; Gruen, D. ^[19]; Gruendl, R. A. ^[21]; Gschwend, J. ^[20]; Gutierrez, G. ^[8]; Hartley, W. G. ^[30]; Hollowood, D. L. ^[31]; Honscheid, K. ^[32]; James, D. J. ^[33]; Krause, E. ^[26]; Maia, M. A. G. ^[20]; March, M. ^[23]; Menanteau, F. ^[21]; Miquel, R. ^[34]; Ogando, R. L. C. ^[20]; Plazas, A. A. ^[35]; Sanchez, E. ^[25]; Santiago, B. ^[36]; Scarpine, V. ^[8]; Schindler, R. ^[37]; Sevilla-Noarbe, I. ^[25]; Smith, M. ^[38]; Smith, R. C. ^[11]; Soares-Santos, M. ^[39]; Sobreira, F. ^[40]; Suchyta, E. ^[41]; Swanson, M. E. C. ^[42]; Tarle, G. ^[43]; Tucker, D. L. ^[8]; Walker, A. R. ^[11]

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1. Department of Physics, University of Surrey, Guildford GU2 7XH, UK; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
2. Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, IL 60510, USA; Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
3. McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213, USA; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
4. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK; Center for Computational Astrophysics, Flatiron Institute, 162 5th Avenue, New York, NY 10010, USA
5. Department of Physics, University of Surrey, Guildford GU2 7XH, UK
6. LSST, 933 North Cherry Avenue, Tucson, AZ 85721, USA
7. Department of Physics, University of Illinois at Urbana-Champaign, 1110 W. Green St., Urbana, IL 61801, USA; Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, IL 60510, USA
8. Fermi National Accelerator Laboratory, P. O. Box 500, Batavia, IL 60510, USA
9. Australian Astronomical Observatory, North Ryde, NSW 2113, Australia
10. George P. and Cynthia Woods Mitchell Institute for Fundamental Physics and Astronomy, and Department of Physics and Astronomy, Texas A&M University, College Station, TX 77843, USA
11. Cerro Tololo Inter-American Observatory, National Optical Astronomy Observatory, Casilla 603, La Serena, Chile
12. Kavli Institute for Cosmological Physics, University of Chicago, Chicago, IL 60637, USA
13. Observatories of the Carnegie Institution for Science, 813 Santa Barbara St., Pasadena, CA 91101, USA
14. Department of Physics, Stanford University, 382 Via Pueblo Mall, Stanford, CA 94305, USA; Kavli Institute for Particle Astrophysics & Cosmology, P. O. Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
15. Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; Department of Physics and Electronics, Rhodes University, PO Box 94, Grahamstown, 6140, South Africa
16. Institute of Cosmology & Gravitation, University of Portsmouth, Portsmouth, PO1 3FX, UK
17. CNRS, UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris, France; Sorbonne Universités, UPMC Univ Paris 06, UMR 7095, Institut d’Astrophysique de Paris, F-75014, Paris, France
18. Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK
19. Kavli Institute for Particle Astrophysics & Cosmology, P. O. Box 2450, Stanford University, Stanford, CA 94305, USA; SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
20. Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil; Observatório Nacional, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
21. Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, IL 61801, USA; National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA
22. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona) Spain
23. Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA
24. Kavli Institute for Particle Astrophysics & Cosmology, P. O. Box 2450, Stanford University, Stanford, CA 94305, USA
25. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
26. Department of Astronomy/Steward Observatory, 933 North Cherry Avenue, Tucson, AZ 85721-0065, USA; Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
27. Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA; Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA
28. Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, 28049 Madrid, Spain
29. Institut d’Estudis Espacials de Catalunya (IEEC), 08193 Barcelona, Spain; Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, 08193 Barcelona, Spain
30. Department of Physics & Astronomy, University College London, Gower Street, London, WC1E 6BT, UK; Department of Physics, ETH Zurich, Wolfgang-Pauli-Strasse 16, CH-8093 Zurich, Switzerland
31. Santa Cruz Institute for Particle Physics, Santa Cruz, CA 95064, USA
32. Center for Cosmology and Astro-Particle Physics, The Ohio State University, Columbus, OH 43210, USA; Department of Physics, The Ohio State University, Columbus, OH 43210, USA
33. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA
34. Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain; Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, Campus UAB, 08193 Bellaterra (Barcelona) Spain
35. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
36. Instituto de Física, UFRGS, Caixa Postal 15051, Porto Alegre, RS - 91501-970, Brazil; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
37. SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
38. School of Physics and Astronomy, University of Southampton, Southampton, SO17 1BJ, UK
39. Brandeis University, Physics Department, 415 South Street, Waltham MA 02453
40. Instituto de Física Gleb Wataghin, Universidade Estadual de Campinas, 13083-859, Campinas, SP, Brazil; Laboratório Interinstitucional de e-Astronomia - LIneA, Rua Gal. José Cristino 77, Rio de Janeiro, RJ - 20921-400, Brazil
41. Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831
42. National Center for Supercomputing Applications, 1205 West Clark St., Urbana, IL 61801, USA
43. Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA

In this work, we present results of the first dynamical stream fits to the recently discovered Tucana III stream. These fits assume a fixed Milky Way potential and give proper motion predictions, which can be tested with the upcoming Gaia Data Release 2 (DR2). These fits reveal that Tucana III is on an eccentric orbit around the Milky Way and, more interestingly, that Tucana III passed within 15 kpc of the Large Magellanic Cloud (LMC) approximately 75 Myr ago. Given this close passage, we fit the Tucana III stream in the combined presence of the Milky Way and the LMC. We find that the predicted proper motions depend on the assumed mass of the LMC and that the LMC can induce a substantial proper motion perpendicular to the stream track. A detection of this misalignment will directly probe the extent of the LMC’s influence on our Galaxy, and has implications for nearly all methods which attempt to constraint the Milky Way potential. Lastly, such a measurement will be possible with the upcoming Gaia DR2, allowing for a measurement of the LMC’s mass.

• Research Organization: Arizona U., Astron. Dept. - Steward Observ.; Australian Astron. Observ.; Barcelona, IEEC; Barcelona, IFAE; Brandeis U.; CCA, New York; Caltech, JPL; Cambridge U., Inst. of Astron.; Campinas State U.; Carnegie Inst. Observ.; Carnegie Mellon U.; Cerro-Tololo InterAmerican Obs.; Chicago U., KICP; Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Harvard-Smithsonian Ctr. Astrophys.; ICE, Bellaterra; ICREA, Barcelona; Illinois U., Urbana; Illinois U., Urbana, Astron. Dept.; LIneA, Rio de Janeiro; LSST Corp.; Madrid, CIEMAT; Madrid, IFT; Michigan U.; NCSA, Urbana; Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Ohio State U.; Ohio State U., CCAPP; Paris, Inst. Astrophys.; Pennsylvania U.; Portsmouth U., ICG; Rhodes U.; Rio Grande do Sul U.; Rio de Janeiro Observ.; SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Southampton U.; Stanford U., Phys. Dept.; Surrey U.; Texas A-M; UC, Santa Cruz, Inst. Part. Phys.; University Coll. London; Zurich, ETH
• Sponsoring Organization: US Department of Energy; USDOE; USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR) (SC-21); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: DES Collaboration
• Grant/Contract Number: AC02-07CH11359; AC02-76SF00515; AC05-00OR22725
• OSTI ID: 1479691
• Alternate ID(s): OSTI ID: 1490628; OSTI ID: 1497717
• Report Number(s): FERMILAB-PUB-18-109-AE-PPD
• Journal Information: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 3 Vol. 481; ISSN 0035-8711
• Publisher: Royal Astronomical Society
• Country of Publication: United States
• Language: English

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