University of Illinois at Urbana-Champaign

Department of Astronomy

Kenneth M. Yoss


Professor Emeritus
Ph.D., University of Michigan, 1953

yoss@astro.uiuc.edu

Working with several others, we are deriving kinematic and abundance information in all cardinal direcitions by acquiring abundance indices, luminosities, and radial velocities, primarily through classification spectra and intermediate-band photometry. Observations have been, and are being obtained from CTIO, KPNO, DAO, and Mount Laguna Observatory. Recently observations from the KPNO echelle spectrograph and from the WIYN Hydra spectrograph system have been obtained in the NGP direction, for deriving more detailed abundances of thick-disk and halo giants. 
Selected Publications:
"Metallicity and Velocity Distribution of Giants Towards the Galactic
Poles", 1991, Astrophys. J. 377, 442 (with K. Ratnatunga).

"Velocity Dispersions and Mean Abundances for Roman's G5-K1 Spectroscopic
Groups", 1992, Astron. Journ. 104, 975.

"Spectroscopic and UBV Observations of Blue Stars at the NGP", 1994, in
"Hot Stars in the Galactic Halo", Ed. Adelman, S.J., Upgren. A.R., 
Adelman. C.J., 168-174 (with D. J. Bell, H. L. Detweiler, S. Casertano, 
G. Bazan, A. Shankar, and S. Points).

"High Resolution Spectroscopy of Metal-Rich Halo Stars", in "Formation of 
the Galactic Halo....  Inside and Out", Ed. H. Morrison and Ata Sarajedini,
351 (with G. Bazan and C. Sneden).