Satellite galaxies' drag on field stars in the Milky Way

Abstract

With Gaia EDR3 data, velocity dispersion of Milky Way field stars around satellite galaxies have been investigated. We have fitted velocity dispersion against distance to satellite galaxy and found the gradient of velocity dispersion is related to the mass of satellite galaxy. With order-of-magnitude approximations, a linear correlation has been fitted between the mass of satellite galaxy and gradient of velocity dispersion caused by its gravitational drag. Though our result is an observational qualitative result, it shows better relation could be obtained with more observations in the future.

8 pages, 3 figures

References in corpus (4)

• Methods for Interpreting and Understanding Deep Neural Networks
• Physically Interpretable Neural Networks for the Geosciences: Applications to Earth System Variability
• Temporal and Spatial Evolutions of a Large Sunspot Group and Great Auroral Storms around the Carrington Event in 1859
• Explaining and Interpreting LSTMs