2018
DOI: 10.1093/mnras/sty2007
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Abstract: We consider the feasibility of testing Newtonian gravity at low accelerations using wide binary (WB) stars separated by 3 kAU. These systems probe the accelerations at which galaxy rotation curves unexpectedly flatline, possibly due to Modified Newtonian Dynamics (MOND). We conduct Newtonian and MOND simulations of WBs covering a grid of model parameters in the system mass, semi-major axis, eccentricity and orbital plane. We self-consistently include the external field (EF) from the rest of the Galaxy on the S… Show more

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Cited by 65 publications
(114 citation statements)
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References 139 publications
(182 reference statements)
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“…Radio tracking data from Cassini has placed strong constraints on the MOND interpolating function, though some choices are still consistent with observations (Hees et al 2014(Hees et al , 2016. Nearby wide binary stellar systems could be even more important as the MOND circular velocity exceeds the Newtonian value by ≈ 20% (Banik & Zhao 2018). Such systems do appear to show a departure from Newtonian expectations , though it was later shown that the two can be reconciled with a more careful rejection of outliers (Banik 2019).…”
Section: Comparison With Hernandez (2019)mentioning
confidence: 84%
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“…Radio tracking data from Cassini has placed strong constraints on the MOND interpolating function, though some choices are still consistent with observations (Hees et al 2014(Hees et al , 2016. Nearby wide binary stellar systems could be even more important as the MOND circular velocity exceeds the Newtonian value by ≈ 20% (Banik & Zhao 2018). Such systems do appear to show a departure from Newtonian expectations , though it was later shown that the two can be reconciled with a more careful rejection of outliers (Banik 2019).…”
Section: Comparison With Hernandez (2019)mentioning
confidence: 84%
“…For MOND, the dynamics of wide binary stars is a promising 'experimentum crucis' in the near future (e.g. Banik & Zhao 2018). If the observed dynamical discrepancies are due to DM, then massive objects moving through the Galactic DM halo should experience dynamical friction (Chandrasekhar 1943).…”
Section: Introductionmentioning
confidence: 99%
“…If a slightly heavier spacecraft can be launched, it might be possible to perform Cavendish-style gravitational experiments beyond the Sun's MOND radius. As discussed in Banik & Zhao (2018d, figure 1), the force between two point masses would exceed the Newtonian expectation by ≈ 30 − 60% depending on their heliocentric distance, orientation with respect to the Galactic external field and, to a smaller extent, their mass ratio (see their figure 8). In general, the force would not be parallel to the separation between the masses, causing the system as a whole to spontaneously undergo torsional oscillations.…”
Section: Onboard Gravitational Experimentsmentioning
confidence: 93%
“…The external field entering this equation is the Newtonianequivalent quantity g N,ext , the Newtonian gravity exerted by the rest of our Galaxy on the Solar System. As discussed in section 9.3.1 of Banik & Zhao (2018d), the Sun's location in the outskirts of the Galactic disk means that it is quite accurate to use the spherically symmetric relation between g N,ext and the actual external field gext.…”
Section: Governing Equationsmentioning
confidence: 99%
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