18 citations · 27 across the 2 of their papers we have counts for
4 papers
The Rotation of the halo of NGC 6822 from the radial velocities of carbon stars
Graham P Thompson, Sean G Ryan, Lisette F Sibbons
Using spectra taken with the AAOmega spectrograph, we measure the radial velocities of over 100 stars, many of which are intermediate age carbon stars, in the direction of the dwar…
The AGB population in IC 1613 using JHK photometry
L. F. Sibbons, S. G. Ryan, M. Irwin +1
A member of the Local Group, IC 1613 is a gas rich irregular dwarf galaxy that appears to have formed stars continuously over the last 10 Gyr and is relatively independent of exter…
The AGB population of NGC 6822: distribution and the C/M ratio from JHK photometry
L. F. Sibbons, S. G. Ryan, M. -R. L. Cioni M. Irwin +1
NGC 6822 is an irregular dwarf galaxy and part of the Local Group. Its close proximity and apparent isolation provide a unique opportunity to study galactic evolution without any o…
The AGB population of NGC 6822
L. F. Sibbons, M. -R. L. Cioni, M. Irwin +1
The metallicity gradient and the stellar distribution within the Local Group dwarf galaxy NGC 6822 has been studied photometrically using asymptotic branch stars (AGB). In order to…