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T-Lyr1-17236: A Long-Period Low-Mass Eclipsing Binary
Jonathan Devor, David Charbonneau, Guillermo Torres +8
We describe the discovery of a 0.68+0.52 solar mass eclipsing binary (EB) with an 8.4-day orbital period, found through a systematic search of ten fields of the Trans-atlantic Exop…
A Spectroscopic Binary at the M/L Transition
Cullen H. Blake, David Charbonneau, Russel J. White +3
We report the discovery of a single-lined spectroscopic binary with an Ultra Cool Dwarf (UCD) primary with a spectral type between M8 and L0.5. This system was discovered during th…
High-Dispersion Optical Spectra of Nearby Stars Younger Than The Sun
R. J. White, J. M. Gabor, L. A. Hillenbrand
We present high-dispersion (R~16,000) optical (3900-8700 A) spectra of 390 stars obtained with the Palomar 60 inch telescope. The majority of stars observed are part of the Spitzer…
Multiepoch Radial Velocity Observations of L Dwarfs
Cullen H. Blake, David Charbonneau, Russel J. White +2
We report on the development of a technique for precise radial-velocity measurements of cool stars and brown dwarfs in the near infrared. Our technique is analogous to the Iodine (…
An Assessment of HR Diagram Constraints on Ages and Age Spreads in Star-Forming Regions and Young Clusters
Lynne A. Hillenbrand, Amber Bauermeister, Russel J. White
Pre-main sequence evolutionary theory is not well-calibrated to observations. With care, the observed quantities can be converted into effective temperature and luminosity (i.e. th…
The Formation of Brown Dwarfs: Observations
Kevin L. Luhman, Viki Joergens, Charles Lada +3
We review the current state of observational work on the formation of brown dwarfs, focusing on their initial mass function, velocity and spatial distributions at birth, multiplici…