Search Results for author: Daisuke Kawata

Found 3 papers, 1 papers with code

Galactic Bar Resonances Inferred from Kinematically Hot Stars in Gaia EDR3

no code implementations10 Dec 2020 Daisuke Kawata, Junichi Baba, Jason A. S. Hunt, Ralph Schönrich, Ioana Ciucǎ, Jennifer Friske, George Seabroke, Mark Cropper

Using a numerical simulation of an isolated barred disc galaxy, we first demonstrate that the resonances of the inner bar structure induce more prominent features in the action space distribution for the kinematically hotter stars, which are less sensitive to the local perturbation, such as the transient spiral arms.

Astrophysics of Galaxies

Constraining stellar population parameters from narrow band photometric surveys using convolutional neural networks

1 code implementation19 Feb 2020 Choong Ling Liew-Cain, Daisuke Kawata, Patricia Sanchez-Blazquez, Ignacio Ferreras, Myrto Symeonidis

However, it is demonstrated that the diversity of the dataset used to train the neural networks has a dramatic effect on the recovery of galactic stellar population parameters.

Astrophysics of Galaxies

Towards Machine-assisted Meta-Studies: The Hubble Constant

no code implementations31 Jan 2019 Tom Crossland, Pontus Stenetorp, Sebastian Riedel, Daisuke Kawata, Thomas D. Kitching, Rupert A. C. Croft

We present an approach for automatic extraction of measured values from the astrophysical literature, using the Hubble constant for our pilot study.

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