Asset Publisher

A measurement of diffusion in 47 Tucanae

A measurement of diffusion in 47 Tucanae

Publication date: 01 May 2015

Authors: Heyl, J., et al.

Journal: The Astrophysical Journal
Volume: 804
Issue: 1
Page: 53
Year: 2015

Copyright: IOP Publishing

Using images from the Hubble Space Telescope Wide-Field Camera 3, we measure the rate of diffusion of stars through the core of the globular cluster 47 Tucanae (47 Tuc) using a sample of young white dwarfs that were identified in these observations. This is the first direct measurement of diffusion due to gravitational relaxation. We find that the diffusion rate κ ~ 10-13 arcsec2 Myr-1 is consistent with theoretical estimates of the relaxation time in the core of 47 Tuc of about 70 Myr.

Link to publication
Last Update: Sep 1, 2019 8:34:06 AM
15-Jul-2020 09:27 UT

ShortUrl Portlet

Shortcut URL

https://sci.esa.int/s/89zjlOA

Related Publications

Related Links

Documentation