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Disks around Brown Dwarfs and Cool Stars
Daniel Apai, Kevin Luhman, Michael Liu
We review the current picture of disks around cool stars and brown dwarfs, including disk fractions, mass estimates, disk structure and dispersal, accretion, dust composition, and…
Properties of Circum(sub)stellar Accretion Disks
Michael C. Liu, Alan T. Tokunaga, Joan Najita
We have completed a systematic survey for disks around young brown dwarfs and very low mass stars. By choosing a well-defined sample and by obtaining sensitive thermal IR observati…
Disks around Young Brown Dwarfs
Michael C. Liu
We present some results from a systematic survey for disks around spectroscopically identified young brown dwarfs and very low mass stars. We find that ~75% of our sample show intr…
Extremely Red Objects in the Field of QSO 1213-0017: A Galaxy Concentration at z=1.31
Michael C. Liu, Arjun Dey, James R. Graham +2
We have discovered an excess of extremely red objects (EROs) surrounding the z=2.69 quasar QSO 1213-0017 (UM 485). Optical/IR colors for these galaxies are consistent with z=1-2 el…
Stellar Populations of Elliptical Galaxies from Surface Brightness Fluctuations
Michael C. Liu, Stephane Charlot, James R. Graham
We are using optical/IR surface brightness fluctuations (SBFs) to validate the latest stellar population synthesis models and to understand the stellar populations of ellipticals.…