Direct imaging and astrometric detection of a gas giant planet orbiting an accelerating star.

Direct imaging of gas giant exoplanets provides information on their atmospheres and the architectures of planetary systems. However, few planets have been detected in blind surveys with direct imaging. Using astrometry from the Gaia and Hipparcos spacecraft, we identified dynamical evidence for a gas giant planet around the nearby star HIP 99770. We confirmed the detection of this planet with direct imaging using the Subaru Coronagraphic Extreme Adaptive Optics instrument. The planet, HIP 99770 b, orbits 17 astronomical units from its host star, receiving an amount of light similar to that reaching Jupiter. Its dynamical mass is 13.9 to 16.1 Jupiter masses. The planet-to-star mass ratio [(7 to 8) × 10-3] is similar to that of other directly imaged planets. The planet's atmospheric spectrum indicates an older, less cloudy analog of the previously imaged exoplanets around HR 8799.

Concurrent Assessment of the CardioMEMS HF System and HeartLogic HF Diagnostic: A Retrospective Case Series.

BACKGROUND: Heart failure (HF) causes high morbidity and mortality despite advances in medical therapy. Remote patient monitoring for HF allows for the optimization of medical therapy and prevention of HF hospitalizations. This study is the first to assess pulmonary artery diastolic pressures (PADP) using the CardioMEMS HF System (CMEMS) and cardiac implantable electronic device-based multisensor indexes (HeartLogic index [HLI]) using the HeartLogic HF Diagnostic (HL) in a small, retrospective cohort of patients with HF at a single center. METHODS AND RESULTS: Any hospitalization, HF hospitalization, HF-related outpatient visit, and pulmonary artery pressure action were recorded in 7 patients with concurrent CMEMS and HL measurements for at least 1 year. The median time before both platforms were implanted and present in the same participant was 3.12 months. The median study period was 1.44 years per participant. Data availability for HL was significantly higher at 99.6% compared with 64.1% adherence for CMEMS (P = .016). Overall, PADP was only weakly correlated to HLI (r = 0.098), but there was a 2.87 mm Hg (P = .014) estimated increase in PADP during HLI alert periods versus nonalert periods. Similarly, the estimated odds of being above a PADP goal was 4.7 times higher (95% confidence interval 3.0-7.2, P < .001) in HLI alert vs nonalert periods. CONCLUSIONS: Concurrent analysis of patients with CMEMS and HL showed an association between PADP and HLI, but the correlation was weak. However, there was a significant increase in PADP during HLI alert periods versus nonalert periods.

First light of the Gemini Planet imager.

The Gemini Planet Imager is a dedicated facility for directly imaging and spectroscopically characterizing extrasolar planets. It combines a very high-order adaptive optics system, a diffraction-suppressing coronagraph, and an integral field spectrograph with low spectral resolution but high spatial resolution. Every aspect of the Gemini Planet Imager has been tuned for maximum sensitivity to faint planets near bright stars. During first-light observations, we achieved an estimated H band Strehl ratio of 0.89 and a 5-σ contrast of 10(6) at 0.75 arcseconds and 10(5) at 0.35 arcseconds. Observations of Beta Pictoris clearly detect the planet, Beta Pictoris b, in a single 60-s exposure with minimal postprocessing. Beta Pictoris b is observed at a separation of 434 ± 6 milliarcseconds (mas) and position angle 211.8 ± 0.5°. Fitting the Keplerian orbit of Beta Pic b using the new position together with previous astrometry gives a factor of 3 improvement in most parameters over previous solutions. The planet orbits at a semimajor axis of [Formula: see text] near the 3:2 resonance with the previously known 6-AU asteroidal belt and is aligned with the inner warped disk. The observations give a 4% probability of a transit of the planet in late 2017.