42 citations · 152 across the 14 of their papers we have counts for
14 papers
An Acceleration is Worth a Hundred Thousand Phase Space Measurements
Thomas Donlon, Sukanya Chakrabarti, Elena D'Onghia
It is now possible to directly measure the accelerations that arise from the distribution of (dark) matter in the Milky Way. These acceleration-based measurements of the local dark…
Weighing the Milky Way's Satellite Galaxies Using Pulsar Accelerations
Thomas Donlon, Sukanya Chakrabarti, Jason A. S. Hunt
The properties of dwarf galaxies orbiting the Milky Way (MW) are useful for testing models of the formation of our Galaxy, and by extension various theories of cosmology. Recent ef…
Mean Mass Density near the Sun from the Divergence Theorem and Pulsar Accelerations
Thomas Donlon, Lawrence M. Widrow, Sukanya Chakrabarti
We introduce a new, non-parametric method for estimating the mass enclosed within a sphere of arbitrary radius centered on the Sun. The method is based on the divergence theorem as…
Chemical Components in the Virgo Overdensity and Hercules-Aquila Cloud: hints of more than one merger event in GSE-like debris
Haoyang Liu, Cuihua Du, Thomas Donlon +1
Using elemental abundances for 1.26 million K giants in the LAMOST DR8 value-added catalog, we analyze the chemical abundances of the Virgo Overdensity (VOD) and Hercules-Aquila Cl…
Empirical Modeling of Magnetic Braking in Millisecond Pulsars to Measure the Local Dark Matter Density and Effects of Orbiting Satellite Galaxies
Thomas Donlon, Sukanya Chakrabarti, Sophia Vanderwaal +3
We present a novel method that enables us to estimate the acceleration of individual millisecond pulsars (MSPs) using only their spin period and its time derivative. For our binary…
The Anomalous Acceleration of PSR J2043+1711: Long-Period Orbital Companion or Stellar Flyby?
Thomas Donlon, Sukanya Chakrabarti, Michael T. Lam +53
Based on the rate of change of its orbital period, PSR J2043+1711 has a substantial peculiar acceleration of 3.5 0.8 mm/s/yr, which deviates from the acceleration predicted b…
The imprint of dark matter on the Galactic acceleration field
Arpit Arora, Robyn E. Sanderson, Sukanya Chakrabarti +6
Measurements of the accelerations of stars enabled by time-series extreme-precision spectroscopic observations, from pulsar timing, and from eclipsing binary stars in the Solar Nei…
Galactic Structure From Binary Pulsar Accelerations: Beyond Smooth Models
Thomas Donlon, Sukanya Chakrabarti, Lawrence M. Widrow +3
We measure the line-of-sight accelerations of 26 binary pulsars due to the Milky Way's gravitational potential, and produce a 3-dimensional map of the acceleration field of the Gal…
The Debris of the "Last Major Merger" is Dynamically Young
Thomas Donlon, Heidi Jo Newberg, Robyn Sanderson +4
The Milky Way's (MW) inner stellar halo contains an [Fe/H]-rich component with highly eccentric orbits, often referred to as the "last major merger." Hypotheses for the origin of t…
A Swing of the Pendulum: The Chemodynamics of the Local Stellar Halo Indicate Contributions from Several Radial Merger Events
Thomas Donlon, Heidi Jo Newberg
We find that the chemical abundances and dynamics of APOGEE and GALAH stars in the local stellar halo are inconsistent with a scenario in which the inner halo is primarily composed…
The Milky Way's Shell Structure Reveals the Time of a Radial Collision
Thomas Donlon, Heidi Jo Newberg, Robyn Sanderson +1
We identify shell structures in the Milky Way for the first time. We find 2 shells in the Virgo Overdensity (VOD) region and 2 shells in the Hercules Aquila Cloud (HAC) region usin…
The Virgo Overdensity Explained
Thomas Donlon, Heidi Jo Newberg, Jake Weiss +2
We suggest that the Virgo Overdensity (VOD) of stars in the stellar halo is the result of a radial dwarf galaxy merger that we call the Virgo Radial Merger. Because the dwarf galax…
The substructures in the local stellar halo from Gaia and LAMOST
Hefan Li, Cuihua Du, Shuai Liu +2
Based on the second Gaia data release (Gaia DR2) and spectroscopy from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data, we identified 20,089 halo stars…
The high velocity stars in the Local Stellar Halo from Gaia and LAMOST
Cuihua Du, Hefan Li, Shuai Liu +2
Based on the first Gaia data release and spectroscopy from the LAMOST Data Release 4, we study the kinematics and chemistry of the local halo stars. The halo stars are identified k…