219 citations · 663 across the 7 of their papers we have counts for
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Revised metallicity classes for low-mass stars: dwarfs (dM), subdwarfs (sdM), extreme subdwarfs (esdM), and ultra subdwarfs (usdM)
Sebastien Lepine, R. Michael Rich, Michael M. Shara
The current classification system of M stars on the main sequence distinguishes three metallicity classes (dwarfs - dM, subdwarfs - sdM, and extreme subdwarfs - esdM). The spectros…
The core binary fractions of star clusters from realistic simulations
Jarrod R. Hurley, Sverre J. Aarseth, Michael M. Shara
We investigate the evolution of binary fractions in star clusters using N-body models of up to 100000 stars. Primordial binary frequencies in these models range from 5% to 50%. Sim…
HST Observations of the White Dwarf Cooling Sequence of M4
Brad Hansen, Harvey Richer, Greg Fahlman +7
We investigate in detail the white dwarf cooling sequence of the globular cluster Messier 4. In particular we study the influence of various systematic uncertainties, both observat…
LSR1610-0040: the first early-type L subdwarf
Sebastien Lepine, R. Michael Rich, Michael M. Shara
We report the discovery of LSR1610-0040, a previously unreported r=17.5 star with a very high proper motion mu=1.46"/yr. This very cool star (b-i=6.3) is found to have a peculiar s…
Discovery of an ultra-cool subdwarf: LSR1425+7102, first star with spectral type sdM8.0
Sebastien Lepine, Michael M. Shara, R. Michael Rich
We report the discovery of the coolest subdwarf reported to date. The star LSR1425+7102 was discovered in our survey for faint high proper motion stars in the northern sky. Follow-…
A Far-Ultraviolet Spectroscopic Survey of the Globular Cluster 47 Tuc
C. Knigge, M. M. Shara, D. R. Zurek +2
We present preliminary results from a FUV spectroscopic and photometric survey of the globular cluster 47 Tuc. Our main goal is to either confirm or rule out the existence of a lar…