A spectroscopic confirmation of the Bootes II dwarf spheroidal (2008)
Koch, A., Wilkinson, M. I., Kleyna, J. T., Irwin, M., Zucker, D. B., Belokurov, V., ...
We present a new suite of photometric and spectroscopic data for the faint Bootes II dwarf spheroidal galaxy candidate. Our deep photometry, obtained with the INT/WFC, suggests a distance of 46 kpc...
Koch, A., Grebel, E. K., Gilmore, G. F., Wyse, R. F. G., Kleyna, J. T., Harbeck, D. R., ...
We have obtained high-resolution spectroscopy of ten red giants in the Carina dwarf spheroidal (dSph) with UVES at the ESO/VLT. Here we present the abundances of O,Na,Mg,Si,Ca,Ti and Fe. By comparing...
Modelling the dynamical evolution of the Bootes dwarf spheroidal galaxy (2008)
Fellhauer, M., Wilkinson, M. I., Evans, N. W., Belokurov, V., Irwin, M. J., Gilmore, G., ...
We investigate a wide range of possible evolutionary histories for the recently discovered Bootes dwarf spheroidal galaxy, a Milky Way satellite. By means of N-body simulations we follow the...
Stellar kinematics in the remote Leo II dwarf spheroidal galaxy -- Another brick in the wall (2007)
Koch, A., Kleyna, J. T., Wilkinson, M. I., Grebel, E. K., Gilmore, G. F., Evans, N. W., ...
We present the projected velocity dispersion profile for the remote (d=233kpc) Galactic dwarf spheroidal (dSph) galaxy Leo II, based on 171 discrete stellar radial velocities that were obtained from...
Cats and dogs, hair and a hero: a quintet of New Milky Way companions (2007)
Belokurov, V., Zucker, D. B., Evans, N. W., Kleyna, J. T., Koposov, S., Hodgkin, S. T., ...
We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed up with either the Subaru or the Isaac Newton Telescopes. They...
Koch, A., Wilkinson, M. I., Kleyna, J. T., Gilmore, G. F., Grebel, E. K., Mackey, A. D., ...
We present low-resolution spectroscopy of 120 red giants in the Galactic satellite dwarf spheroidal (dSph) Leo I, obtained with the GeminiN-GMOS and Keck-DEIMOS spectrographs. We find stars with...
Complexity on Small Scales II: Metallicities and Ages in the Leo II Dwarf Spheroidal Galaxy (2006)
Koch, A., Grebel, E. K., Kleyna, J. T., Wilkinson, M. I., Harbeck, D. R., Gilmore, G. F., ...
We present metallicities and ages for 52 red giants in the remote Galactic dwarf spheroidal (dSph) galaxy Leo II. These stars cover the entire surface area of Leo II and are radial velocity members....
Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions (2006)
Belokurov, V., Zucker, D. B., Evans, N. W., Kleyna, J. T., Koposov, S., Hodgkin, S. T., ...
We present five new satellites of the Milky Way discovered in Sloan Digital Sky Survey (SDSS) imaging data, four of which were followed-up with either the Subaru or the Isaac Newton Telescopes. They...
A Curious New Milky Way Satellite in Ursa Major (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Kleyna, J. T., Irwin, M. J., Wilkinson, M. I., ...
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up with Subaru imaging....
The internal kinematics of dwarf spheroidal galaxies (2006)
Wilkinson, M. I., Kleyna, J. T., Evans, N. W., Gilmore, G. F., Read, J. I., Koch, A., ...
The status of kinematic observations in Local Group dwarf spheroidal galaxies (dSphs) is reviewed. Various approaches to the dynamical modelling of these data are discussed and some general features...
A curious Milky Way satellite in Ursa Major (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Kleyna, J. T., Irwin, M. J., Wilkinson, M. I., ...
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up with Subaru imaging....
Koch, A., Grebel, E. K., Wyse, R. F. G., Kleyna, J. T., Wilkinson, M. I., Harbeck, D., ...
The Carina dwarf spheroidal (dSph) galaxy is the only galaxy of this type that shows clearly episodic star formation separated by long pauses. Here we present metallicities for 437 radial velocity...
Ursa Major: a missing low-mass CDM halo? (2005)
Kleyna, J. T., Wilkinson, M. I., Evans, N. W., Gilmore, G.
The recently discovered Ursa Major dwarf spheroidal (dSph) galaxy candidate is about five to eight times less luminous than the faintest previously known dSphs And IX, Draco, and UMi. In this Letter,...
Chemical Evolution in the Carina Dwarf Spheroidal (2004)
Koch, A., Grebel, E. K., Harbeck, D., Wilkinson, M. I., Kleyna, J. T., Gilmore, G. F., ...
We present metallicities for 487 red giants in the Carina dwarf spheroidal (dSph) galaxy that were obtained from FLAMES low-resolution Ca triplet (CaT) spectroscopy. We find a mean [Fe/H] of -1.91...
A photometrically and kinematically distinct core in the Sextans dwarf spheroidal galaxy (2004)
Kleyna, J. T., Wilkinson, M. I., Evans, N. W., Gilmore, G. F.
We present the line of sight radial velocity dispersion profile of the Sextans dwarf spheroidal galaxy (dSph), based on a sample of 88 stars extending to about 1 degree (about 1.5 kpc). Like the...
Kinematically Cold Populations at Large Radii in the Draco and Ursa Minor Dwarf Spheroidals (2004)
Wilkinson, M. I., Kleyna, J. T., Evans, N. W., Gilmore, G. F., Irwin, M. J., Grebel, E. K.
We present projected velocity dispersion profiles for the Draco and Ursa Minor (UMi) dwarf spheroidal galaxies based on 207 and 162 discrete stellar velocities, respectively. Both profiles show a...
Dark Matter in Dwarf Spheroidals II: Observations and Modelling of Draco (2001)
Kleyna, J. T., Wilkinson, M. I., Evans, N. W., Gilmore, G.
We present stellar radial velocity data for the Draco dwarf spheroidal galaxy obtained using the AF2/WYFFOS instrument combination on the William Herschel Telescope. Our dataset consists of 186...