We present an updated analysis of the GJ 876 planetary system based on an augmented data set that incorporates 65 new high-precision radial velocities obtained with the Keck telescope from 2001 to 2004. These new radial velocities permit a more accurate characterization of the planet-planet interactions exhibited by the system. Selfconsistent three-body orbital fits (which incorporate both the ...

BACKGROUND Bisphosphonates can adversely affect fracture-healing because they inhibit osteoclastic bone resorption. It is unclear whether bisphosphonates can be initiated safely for patients who have sustained an acute distal radial fracture. The purpose of this randomized study was to determine whether the early use of bisphosphonate affects healing and outcomes of osteoporotic distal radial f...

High precision, high cadence radial velocity monitoring over the past 8 years at the W. M. Keck Observatory reveals evidence for a third planet orbiting the nearby (4.69 pc) dM4 star GJ 876. The residuals of three-body Newtonian fits, which include GJ 876 and Jupiter mass companions b and c, show significant power at a periodicity of 1.9379 days. Self-consistently fitting the radial velocity da...

We report spectroscopic observations of HD 27638B, the secondary in a visual binary in which the physically associated primary (separation ∼19) is a B9 V star. The secondary shows strong Li λ6708 absorption suggesting youth, and has attracted attention in the past as a candidate post-T Tauri star although this has subsequently been ruled out. It was previously known to be a double-lined spectro...

In this Paper we report on phase resolved I–band optical spectroscopic and photometric observations of Cir X–1 obtained with the Very Large Telescope. The spectra are dominated by Paschen absorption lines at nearly all orbital phases except near phase zero (coinciding with the X–ray dip) when the absorption lines are filled–in by broad Paschen emission lines. The radial velocity curve of the ab...

We define and analyze the photometric orbit (PhO) of an extrasolar planet observed in reflected light. In our definition, the PhO is a keplerian entity with six parameters: semimajor axis, eccentricity, mean anomaly at some particular time, argument of periastron, inclination angle, and effective radius, which is the square root of the geometric albedo times the planetary radius. Preliminarily,...

High precision, high cadence radial velocity monitoring over the past 8 years at the W. M. Keck Observatory reveals evidence for a third planet orbiting the nearby (4.69 pc) dM4 star GJ 876. The residuals of three-body Newtonian fits, which include GJ 876 and Jupiter mass companions b and c, show significant power at a periodicity of 1.9379 days. Self-consistently fitting the radial velocity da...

The profile of the fluorescent iron line from black hole accretion disks is a powerful diagnostic properties, such as spin and inclination. state-of-the-art, however, considers an disk whose angular momentum aligned with that hole; this very constraining assumption which unlikely to apply many or even most astrophysical systems. Here, we present first simulation reflection spectrum warped using...

We derive radial profiles of the surface-mass-density for 19 spiral galaxies directly from their high-resolution rotation curves. Using the corresponding luminosity profiles, we obtain the radial distribution of the mass-to-luminosity ratios (M/L) from the inner bulge (∼ a few 100 pc) to the outer disk (≥ 2−10 kpc) for 11 galaxies (with inclination < 70 in order to reduce the influence of the i...

ABSTRACT BACKGROUND Although fractures of the distal radius are a common clinical presentation, many factors affect instability of these injuries. The aim of this study was to assess the influence of age, sex, distal radial ulnar joint injury (DRUJ), ulnar styloid fracture, and dorsal displacement in late collapse of distal radius fractures. METHODS Three hundred twenty-nine patient fractu...