ABSTRACT
We present broad-band photometry of 30 planetary transits of the ultra-hot-Jupiter KELT-16 b, using five medium-class telescopes. The transits were monitored through standard $B,\, V,\, R,\, ...I$ filters and four were simultaneously observed from different places, for a total of 36 new light curves. We used these new photometric data and those from the TESS space telescope to review the main physical properties of the KELT-16 planetary system. Our results agree with previous measurements but are more precise. We estimated the mid-transit times for each of these transits and combined them with others from the literature to obtain 69 epochs, with a time baseline extending over more than 4 yr, and searched for transit time variations. We found no evidence for a period change, suggesting a lower limit for orbital decay at 8 Myr, with a lower limit on the reduced tidal quality factor of $Q^{\prime }_{\star }\gt (1.9 \pm 0.8) \times 10^5$ with $95{{\rm {per\ cent}}}$ confidence. We built up an observational, low-resolution transmission spectrum of the planet, finding evidence of the presence of optical absorbers, although with a low significance. Using TESS data, we reconstructed the phase curve finding that KELT-16 b has a phase offset of 25.25 ± 14.03 °E, a day- and night-side brightness temperature of 3190 ± 61 K and 2668 ± 56 K, respectively. Finally, we compared the flux ratio of the planet over its star at the TESS and Spitzer wavelengths with theoretical emission spectra, finding evidence of a temperature inversion in the planet’s atmosphere, the chemical composition of which is preferably oxygen-rich rather than carbon-rich.
Aims. Our aim in this paper is to refine the orbital and physical parameters of the HATS-2 planetary system and study transit timing variations and atmospheric composition thanks to transit ...observations that span more than 10 yr and that were collected using different instruments and pass-band filters. We also investigate the orbital alignment of the system by studying the anomalies in the transit light curves induced by starspots on the photosphere of the parent star. Methods. We analysed new transit events from both ground-based telescopes and NASA’s TESS mission. Anomalies were detected in most of the light curves and modelled as starspots occulted by the planet during transit events. We fitted the clean and symmetric light curves with the JKTEBOP code and those affected by anomalies with the PRISM+GEMC codes to simultaneously model the photometric parameters of the transits and the position, size, and contrast of each starspot. Results. We found consistency between the values we found for the physical and orbital parameters and those from the discovery paper and ATLAS9 stellar atmospherical models. We identified different sets of consecutive starspot-crossing events that temporally occurred in less than five days. Under the hypothesis that we are dealing with the same starspots, occulted twice by the planet during two consecutive transits, we estimated the rotational period of the parent star and, in turn the projected and the true orbital obliquity of the planet. We find that the system is well aligned. We identified the possible presence of transit timing variations in the system, which can be caused by tidal orbital decay, and we derived a low-resolution transmission spectrum.
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FMFMET, NUK, UL, UM, UPUK
Establecer la utilidad de la resonancia magnética (RM) en pacientes con reemplazo total de rodilla (RTR) dolorosa tras la aplicación de un protocolo optimizado y determinar en qué medida estos ...hallazgos modifican la conducta terapéutica.
Se analizaron con protocolo optimizado las RM de 15 pacientes con RTR dolorosa, realizadas entre marzo de 2013 y febrero de 2014. La evaluación fue hecha por un especialista en musculoesquelético y los hallazgos fueron registrados.
De nuestra población, el 74% eran mujeres y la media de edad fue de 74 +/– 7 años. Se identificaron posibles causas de dolor en el 80% de los casos y se modificó la conducta médica en el 33%. Se encontró líquido articular en el 93% y signos de sinovitis en el 33%. Los tendones rotuliano, cuadricipital y poplíteo se vieron correctamente en el 77%, 92% y 69%, respectivamente; mientras que los ligamentos colaterales medial y lateral fueron visibles en el 46% y 54%, respectivamente.
Si bien hay publicaciones con diferentes prevalencias de sinovitis y demás hallazgos, la mayoría ha demostrado que la RM de rodilla con un protocolo optimizado permite generar cambios en la conducta terapéutica. A su vez, el método siempre ha visualizado los ligamentos y tendones de la rodilla con un éxito similar al de nuestro trabajo.
Aun careciendo de softwares comerciales específicos que reduzcan el artificio metálico, la aplicación de un protocolo optimizado logra identificar hallazgos que guían el tratamiento y permite evaluar las estructuras ligamentarias.
To establish the usefulness of magnetic resonance (MR) in patients with total knee replacement (TKR) pain after applying an optimised protocol, and to determinate which of the findings influence medical decision.
Fifteen patients suffering knee pain after TKR were studied using an optimised MR examination protocol from March 2013 to February 2014. The MR was interpreted by a musculoskeletal radiologist and findings were registered.
Out of the 15 patients, 74% were female. Mean age was 74 +/– 7 years. The cause of pain was identified in 80% of the cases, and the medical decision was changed in 33%. Increased intra-articular fluid was seen in 93%, and signs of synovitis in 33%. The patellar, quadricipital, and popliteal tendons were correctly assessed in 77%, 92%, and 69% of patients, respectively, while the tibial and the fibula collateral ligaments were correctly assessed in 46% and 54% of patients, respectively.
Despite other articles showing a different prevalence of synovitis and MR findings, most of them showed that an optimised protocol impacted on clinical care. Also, most of the adjacent anatomical structures were successfully observed, as in our case.
Even in the absence of metal reduction tailored sequences, an optimised protocol manages to diagnose conditions that alter clinical decisions and allows the identification of adjacent anatomical structures.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Abstract The Jupiter InfraRed Auroral Mapper (JIRAM) instrument on board the Juno spacecraft performed repeated observations of Jupiter's North Equatorial Belt (NEB) around the time of 12th Juno ...pericenter passage on April 1st 2018. The data consist of thermal infrared images and show, among other atmospheric features, two bright Hot Spots on the boundary between the NEB and the Equatorial zone. Night-time images of the same areas at different emission angles were used to constrain the trend of the limb-darkening function. Comparison with simulated observations, computed for different emission angles, total opacities, single scattering albedo ω0 and asymmetry parameter g suggest that ω0 ∼ 0.90±0.05 and g ∼ 0.37±0.15 provide best match with data. Subsequently, we computed the ω0 and g resulting from different size distributions, taking into account the complex refractive indices of ammonium hydrosulfide (NH4SH) by Howett et al. 2007 and Ferraro et al., 1980. Only the former dataset is marginally consistent with JIRAM observations. Similarly, ammonia and hydrazine barely reproduce the experimental data. Tholin, although not usually considered a realistic component for Jupiter's aerosols, provides a better match for particle radii between 0.7 and 1 μm, both as a pure material as well as a thick coating over NH4SH cores. Notably, this radius range is consistent with the mean radius of aerosols as estimated by Ragent et al., 1998 on the basis of Galileo Entry Probe data. Comparison with literature suggests that similar results can be achieved by a large variety of contaminants bearing C-N bounds.
Our aim in this paper is to refine the orbital and physical parameters of the HATS-2 planetary system and study transit timing variations and atmospheric composition thanks to transit observations ...that span more than ten years and that were collected using different instruments and pass-band filters. We also investigate the orbital alignment of the system by studying the anomalies in the transit light curves induced by starspots on the photosphere of the parent star. We analysed new transit events from both ground-based telescopes and NASA's TESS mission. Anomalies were detected in most of the light curves and modelled as starspots occulted by the planet during transit events. We fitted the clean and symmetric light curves with the JKTEBOP code and those affected by anomalies with the PRISM+GEMC codes to simultaneously model the photometric parameters of the transits and the position, size, and contrast of each starspot. We found consistency between the values we found for the physical and orbital parameters and those from the discovery paper and ATLAS9 stellar atmospherical models. We identified different sets of consecutive starspot-crossing events that temporally occurred in less than five days. Under the hypothesis that we are dealing with the same starspots, occulted twice by the planet during two consecutive transits, we estimated the rotational period of the parent star and, in turn the projected and the true orbital obliquity of the planet. We find that the system is well aligned. We identified the possible presence of transit timing variations in the system, which can be caused by tidal orbital decay, and we derived a low-resolution transmission spectrum.
We present broad-band photometry of 30 planetary transits of the ultra-hot Jupiter KELT-16b, using five medium-class telescopes. The transits were monitored through standard B, V, R, I filters and ...four were simultaneously observed from different places, for a total of 36 new light curves. We used these new photometric data and those from the TESS space telescope to review the main physical properties of the KELT-16 planetary system. Our results agree with previous measurements but are more precise. We estimated the mid-transit times for each of these transits and combined them with others from the literature to obtain 69 epochs, with a time baseline extending over more than four years, and searched for transit time variations. We found no evidence for a period change, suggesting a lower limit for orbital decay at 8 Myr, with a lower limit on the reduced tidal quality factor of \(Q^{\prime}_{\star}>(1.9 \pm 0.8) \times 10^5\) with \(95\%\) confidence. We built up an observational, low-resolution transmission spectrum of the planet, finding evidence of the presence of optical absorbers, although with a low significance. Using TESS data, we reconstructed the phase curve finding that KELT-16b has a phase offset of \(25.25 \pm 14.03\) \(^{\circ}\)E, a day- and night-side brightness temperature of \(3190 \pm 61\) K and \(2668 \pm 56\) K, respectively. Finally, we compared the flux ratio of the planet over its star at the TESS and Spitzer wavelengths with theoretical emission spectra, finding evidence of a temperature inversion in the planet's atmosphere, the chemical composition of which is preferably oxygen-rich rather than carbon-rich.
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