Radial Migration of the Sun in the Milky Way: a Statistical Study

Abstract

The determination of the birth radius of the Sun is important to understand the evolution and consequent disruption of the Sun's birth cluster in the Galaxy. Motivated by this fact, we study the motion of the Sun in the Milky Way during the last 4.6 Gyr in order to find its birth radius. We carried out orbit integrations backward in time using an analytical model of the Galaxy which includes the contribution of spiral arms and a central bar. We took into account the uncertainty in the parameters of the Milky Way potential as well as the uncertainty in the present day position and velocity of the Sun. We find that in general the Sun has not migrated from its birth place to its current position in the Galaxy (R_\odot). However, significant radial migration of the Sun is possible when: 1) The 2:1 Outer Lindblad resonance of the bar is separated from the corrotation resonance of spiral arms by a distance ~1 kpc. 2) When these two resonances are at the same Galactocentric position and further than the solar radius. In both cases the migration of the Sun is from outer regions of the Galactic disk to R_\odot, placing the Sun's birth radius at around 11 kpc. We find that in general it is unlikely that the Sun has migrated significantly from the inner regions of the Galactic disk to R_\odot.

19 pages, 13 figures, accepted for publication in MNRAS

References in corpus (11)

• New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey
• Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
• Chemodynamical evolution of the Milky Way disk I: The solar vicinity
• The Milky Way's circular velocity curve between 4 and 14 kpc from APOGEE data
• Radial mixing and the transition between the thick and thin Galactic discs
• The Astrophysical Multipurpose Software Environment
• APOGEE: The Apache Point Observatory Galactic Evolution Experiment
• Radial and vertical flows induced by galactic spiral arms: likely contributors to our "wobbly Galaxy''
• Elemental Abundances of Solar Sibling Candidates
• Assessing the influence of the solar orbit on terrestrial biodiversity
• Galactic bar: normal mode of the stellar disk or superposition of transient spirals?

Cited by in corpus (31)

• Measuring Radial Orbit Migration in the Milky Way Disk
• Keeping it Cool: Much Orbit Migration, yet Little Heating, in the Galactic Disk
• The formation of the solar system
• Origin and evolution of long-period comets
• The origin of interstellar asteroidal objects like 1I/2017 U1 'Oumuamua
• The Gaia-ESO Survey: Probes of the inner disk abundance gradient
• Revisiting long-standing puzzles of the Milky Way: the Sun and its vicinity as typical outer disk chemical evolution
• Gradients of chemical abundances in the Milky Way from HII regions: distances derived from Gaia EDR3 parallaxes and temperature inhomogeneities
• Direct evidence of multiple reservoirs of volatile nitrogen in a protosolar nebula analogue
• 26Al kinematics: superbubbles following the spiral arms? Constraints from the statistics of star clusters and HI supershells
• The Formation of Solar System Analogs in Young Star Clusters
• The evolution of the Sun's birth cluster and the search for the solar siblings with Gaia
• Oort cloud Ecology II: Extra-solar Oort clouds and the origin of asteroidal interlopers
• Capture of exocomets and the erosion of the Oort cloud due to stellar encounters in the Galaxy
• The rate of stellar encounters along a migrating orbit of the Sun
• Oort cloud Ecology II: The chronology of the formation of the Oort cloud
• Dynamics and Morphology of the Milky Way Spiral Arms from the Metallicity Distribution and Radial Mixing
• Timing the Milky Way bar formation and the accompanying radial migration episode
• A Dynamical Model for Clustered Star Formation in the Galactic Disk
• Quest for finding the lost siblings of the Sun
• Was Proxima captured by alpha Centauri A and B?
• Non-intrusive hierarchical coupling strategies for multi-scale simulations in gravitational dynamics
• Depletion and fractionation of nitrogen in collapsing cores
• Actions are weak stellar age indicators in the Milky Way disk
• Solar System Migration Points to a Renewed Concept: Galactic Habitable Orbits
• A path towards constraining the evolution of the interstellar medium and outflows in the Milky Way using APOGEE
• Gas-phase Elemental abundances in Molecular cloudS (GEMS) XI. The evolution of HCN, HNC, and N2H+ isotopic ratios in starless cores
• An efficient integrator for stellar dynamics in effective gravity fields based on the isochrone potential
• Comparing radial migration in dark matter and MOND regimes
• The solar siblings in the Gaia era
• Galactic tides in the Solar System within a non-axisymmetric Milky Way model adjusted to Gaia data