Building an Acceleration Ladder with Tidal Streams and Pulsar Timing

نویسندگان

چکیده

We analyze stellar streams in action-angle coordinates combined with recent local direct acceleration measurements to provide joint constraints on the potential of our Galaxy. Our stream analysis uses Kullback-Leibler divergence a likelihood based two-point correlation function. from pulsar accelerations and for global parameters that describe Milky Way (MW). goal is build an ``acceleration ladder", where are currently limited dynamic range indirect techniques can access much larger volume MW. To constrain MW streams, we consider Palomar 5, Orphan, Nyx, Helmi GD1 streams. Of models have considered here, preferred two-component Staeckel potential. also compare vertical timing, defining function $f(z) = \alpha_{1pulsar}z - \frac{\partial\Phi}{\partial z}$, $\Phi$ determined $\alpha_{1~\rm pulsar}z$ timing observations. indicates Oort limit consistently (regardless choice potential) lower than The calibration derived here may be used correct estimate

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ژورنال

عنوان ژورنال: The astrophysical journal

سال: 2023

ISSN: ['2041-8213', '2041-8205']

DOI: https://doi.org/10.3847/2041-8213/acba15