The DOI matches its Crossref record; 135 of the 135 references it cites were found in a registry or an index.
Gaia DR2 proper motions of dwarf galaxies within 420 kpc: Orbits, Milky Way mass, tidal influences, planar alignments, and group infall
Open accessAbstract
A proper understanding of the Milky Way (MW) dwarf galaxies in a cosmological context requires knowledge of their 3D velocities and orbits. However, proper motion (PM) measurements have generally been of limited accuracy and are available only for more massive dwarfs. We therefore present a new study of the kinematics of the MW dwarf galaxies. We use the Gaia DR2 for those dwarfs that have been spectroscopically observed in the literature. We derive systemic PMs for 39 galaxies and galaxy candidates out to 420 kpc, and generally find good consistency for the subset with measurements available from other studies. We derive the implied Galactocentric velocities, and calculate orbits in canonical MW halo potentials of low (0.8 × 10 12 M ⊙ ) and high mass (1.6 × 10 12 M ⊙ ). Comparison of the distributions of orbital apocenters and 3D velocities to the halo virial radius and escape velocity, respectively, suggests that the satellite kinematics are best explained in the high-mass halo. Tuc III, Crater II, and additional candidates have orbital pericenters small enough to imply significant tidal influences. Relevant to the missing satellite problem, the fact that fewer galaxies are observed to be near apocenter than near pericenter implies that there must be a population of distant dwarf galaxies yet to be discovered. Of the 39 dwarfs: 12 have orbital poles that do not align with the MW plane of satellites (given reasonable assumptions about its intrinsic thickness); 10 have insufficient PM accuracy to establish whether they align; and 17 satellites align, of which 11 are co-orbiting and (somewhat surprisingly, in view of prior knowledge) 6 are counter-orbiting. Group infall might have contributed to this, but no definitive association is found for the members of the Crater-Leo group.
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Citations
Cites
The Structure of Cold Dark Matter Halos
Navarro, J. F., Frenk, C. S., & White, S. D. M. (1996) · The Astrophysical Journal · doi:10.1086/177173 · Cited by 8,544 · cited 1×
“Our estimate of the local escape speed corresponds approximately to that expected for a Navarro, Frenk and White (NFW) dark matter (DM) halo (Navarro et al. 1996) with virial mass 1.2×1012M⊙.”
BackgroundInfluentialGaia Data Release 2: Summary of the contents and survey properties
Gaia Collaboration, Brown, A. G. A., Vallenari, A., Prusti, T., de Bruijne, J. H. J., Babusiaux, C., Bailer-Jones, C. A. L., Biermann, M., Evans, D. W., Eyer, L., et al. (2018) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201833051 · Cited by 8,442
Prusti, T., de Bruijne, J. H. J., Brown, A. G. A., Vallenari, A., Babusiaux, C., Bailer‐Jones, C. A. L., Bastian, U., Biermann, M., Evans, D. W., Eyer, L., et al. (2016) · Astronomy and Astrophysics · doi:10.1051/0004-6361/201629272 · Cited by 7,350
Gaia Data Release 2: The astrometric solution
Lindegren, L., Hernández, J., Bombrun, A., Klioner, S., Bastian, U., Ramos-Lerate, M., de Torres, A., Steidelmüller, H., Stephenson, C., Hobbs, D., et al. (2018) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201832727 · Cited by 1,983
The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
Majewski, S. R., Schiavon, R. P., Frinchaboy, P. M., Prieto, C. A., Barkhouser, R., Bizyaev, D., Blank, B., Brunner, S., Burton, A., Carrera, R., et al. (2017) · The Astronomical Journal · doi:10.3847/1538-3881/aa784d · Cited by 1,831 · cited 1×
“For the Sagittarius dSph we use APOGEE DR14 data (Majewski et al. 2017), selecting all the stars within 30’ of the nominal galaxy center.”
MethodThe Galaxy in Context: Structural, Kinematic, and Integrated Properties
Bland-Hawthorn, J., & Gerhard, O. (2016) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081915-023441 · Cited by 1,656 · cited 1×
“…respect to the Milky Way center of (11±1, 248±3, 7.3±0.5) km/s in a reference frame in which the x-axis is positive pointing inwards from the Sun to the Galactic center, the y-axis in the direction of Galactic rotation and the z-axis towards the North Galactic Cap (Bland-Hawthorn & Gerhard 2016).”
BackgroundInfluentialgalpy: A python LIBRARY FOR GALACTIC DYNAMICS
Bovy, J. (2015) · The Astrophysical Journal Supplement Series · doi:10.1088/0067-0049/216/2/29 · Cited by 1,655 · cited 1×
“For the MW dark matter halo mass we explore two cases: a light halo with virial mass 0.8×1012M⊙ (Bovy 2015) and an heavier model, identical to MWPotential14 but for the MW DM halo virial mass, which is 1.6×1012M⊙ (Fritz et al. 2017).”
MethodInfluentialMajewski, S. R., Skrutskie, M. F., Weinberg, M. D., & Ostheimer, J. C. (2003) · The Astrophysical Journal · doi:10.1086/379504 · Cited by 1,059 · cited 1×
“This is clearly a dangerous region, as empirically highlighted by the obvious state of tidal disruption afflicting Sgr I (Majewski et al. 2003).”
BackgroundThe Kinematics of the Ultra‐faint Milky Way Satellites: Solving the Missing Satellite Problem
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“In case of Hercules we assign the highest priority to the work of Simon & Geha (2007).”
BackgroundMethodInfluentialCats and Dogs, Hair and a Hero: A Quintet of New Milky Way Companions
Belokurov, V. A., Zucker, D. B., Evans, N. W., Kleyna, J. T., Koposov, S. E., Hodgkin, S. T., Irwin, M. J., Gilmore, G. F., Wilkinson, M. I., Fellhauer, M., et al. (2007) · The Astrophysical Journal · doi:10.1086/509718 · Cited by 800
Research works printed but not linked: 6
Cited by
Sorted by citations
Simon, J. (2019) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-091918-104453 · Cited by 437
Baumgardt, H., Hilker, M., Sollima, A., & Bellini, A. (2018) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/sty2997 · Cited by 452
“…of astrophysics, like stellar astrophysics (Gaia Collaboration et al. 2018a), the study of the dynamics of the Milky Way and other nearby galaxies ⋆ E-mail: h.baumgardt@uq.edu.au (e.g. Fritz et al. 2018) and even the study of massive black holes in the distant universe (e.g. Wolf et al. 2018).”
BackgroundThe total mass of the Large Magellanic Cloud from its perturbation on the Orphan stream
Erkal, D., Belokurov, V. A., Laporte, C. F. P., Koposov, S. E., Li, T. S., Grillmair, C. J., Kallivayalil, N., Price-Whelan, A. M., Evans, N. W., Hawkins, K., et al. (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz1371 · Cited by 391
“…are natural candidates since they have had closer passages with the LMC. Tucana III is an especially good candidate given its close passage with the LMC (Erkal et al. 2018; Simon 2018; Fritz et al. 2018), as are the 11 streams recently discovered in the Dark Energy Survey (Shipp et al. 2018).”
BackgroundSelf-citationThe milky way total mass profile as inferred from Gaia DR2
Cautun, M., Benítez-Llambay, A., Deason, A. J., Frenk, C. S., Fattahi, A., Gómez, F. A., Grand, R. J. J., Oman, K. A., Navarro, J. F., & Simpson, C. M. (2020) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/staa1017 · Cited by 332
“…2012; Wang et al. 2012; Cautun et al. 2014a; Hellwing et al. 2016) while the radial mass profile plays a key role in determining the orbits of satellite galaxies and tidal streams (e.g. Barber et al. 2014; Monachesi et al. 2019a; Fritz et al. 2018; Cautun et al. 2019; Garavito-Camargo et al. 2019).”
BackgroundThe Milky Way total mass profile as inferred from Gaia DR2
Cautun, M., Benitez-Llambay, A., Deason, A. J., Frenk, C. S., Fattahi, A., Gómez, F. A., Grand, R. J. J., Oman, K. A., Navarro, J. F., & Simpson, C. M. (2019) · arXiv · doi:10.48550/arxiv.1911.04557 · Cited by 335
“…2012; Wang et al. 2012; Cautun et al. 2014a; Hellwing et al. 2016) while the radial mass profile plays a key role in determining the orbits of satellite galaxies and tidal streams (e.g. Barber et al. 2014; Monachesi et al. 2019a; Fritz et al. 2018; Cautun et al. 2019; Garavito-Camargo et al. 2019).”
Background
Metadata
- Authors
- Fritz, T. K., Battaglia, G., Pawlowski, M. S., Kallivayalil, N., van der Marel, R., Sohn, S. T., Brook, C., & Besla, G.
- Affiliations
- Universidad de La Laguna (ES)
- University of California, Irvine (US)
- University of Virginia (US)
- Space Telescope Science Institute (US)
- University of Arizona (US)
- Venue
- Astronomy & Astrophysics
- Publisher
- EDP Sciences
- Published
- 2018-11
- Volume
- 619
- Pages
- A103
- ISSN
- 0004-6361 (ISSN-L)
- 1432-0746
- OpenAlex
- W4289328036
- Cited by
- 269
- References
- 135
- Citations by year
- 2026: 7 · 2025: 16 · 2024: 23 · 2023: 30 · 2022: 35 · 2021: 45 · 2020: 51 · 2019: 50 · 2018: 12
- FWCI
- 21.20
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Astronomy and Astrophysics (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (1455260, CAREER)
- National Aeronautics and Space Administration (HST‐HF2‐51379.001‐A, NAS 526555)
- Space Telescope Science Institute (NAS5- 26555, 26555)
- European Space Agency
- Ministerio de Economía y Competitividad (AYA2014-56795-P, RYC-2012-11537)
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
- Keywords
- Milky Way dwarf galaxies, proper motions, satellite kinematics, Gaia DR2, escape velocity, missing satellites problem, tidal interactions
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