A chemical survey of exoplanets with ARIEL

Thousands of exoplanets have now been discovered with a huge range of masses, sizes and orbits: from rocky Earth-like planets to large gas giants grazing the surface of their host star. However, the essential nature of these exoplanets remains largely mysterious: there is no known, discernible pattern linking the presence, size, or orbital parameters of a planet to the nature of its parent star. We have little idea whether the chemistry of a planet is linked to its formation environment, or whether the type of host star drives the physics and chemistry of the planet’s birth, and evolution. ARIEL was conceived to observe a large number (~1000) of transiting planets for statistical understanding, including gas giants, Neptunes, super-Earths and Earth-size planets around a range of host star types using transit spectroscopy in the 1.25–7.8 μm spectral range and multiple narrow-band photometry in the optical. ARIEL will focus on warm and hot planets to take advantage of their well-mixed atmospheres which should show minimal condensation and sequestration of high-Z materials compared to their colder Solar System siblings. Said warm and hot atmospheres are expected to be more representative of the planetary bulk composition. Observations of these warm/hot exoplanets, and in particular of their elemental composition (especially C, O, N, S, Si), will allow the understanding of the early stages of planetary and atmospheric formation during the nebular phase and the following few million years. ARIEL will thus provide a representative picture of the chemical nature of the exoplanets and relate this directly to the type and chemical environment of the host star. ARIEL is designed as a dedicated survey mission for combined-light spectroscopy, capable of observing a large and well-defined planet sample within its 4-year mission lifetime. Transit, eclipse and phase-curve spectroscopy methods, whereby the signal from the star and planet are differentiated using knowledge of the planetary ephemerides, allow us to measure atmospheric signals from the planet at levels of 10–100 part per million (ppm) relative to the star and, given the bright nature of targets, also allows more sophisticated techniques, such as eclipse mapping, to give a deeper insight into the nature of the atmosphere. These types of observations require a stable payload and satellite platform with broad, instantaneous wavelength coverage to detect many molecular species, probe the thermal structure, identify clouds and monitor the stellar activity. The wavelength range proposed covers all the expected major atmospheric gases from e.g. H2O, CO2, CH4 NH3, HCN, H2S through to the more exotic metallic compounds, such as TiO, VO, and condensed species. Simulations of ARIEL performance in conducting exoplanet surveys have been performed – using conservative estimates of mission performance and a full model of all significant noise sources in the measurement – using a list of potential ARIEL targets that incorporates the latest available exoplanet statistics. The conclusion at the end of the Phase A study, is that ARIEL – in line with the stated mission objectives – will be able to observe about 1000 exoplanets depending on the details of the adopted survey strategy, thus confirming the feasibility of the main science objectives.Peer reviewedFinal Published versio

Hedonic models and air pollution: Twenty-five years and counting

This paper reports a meta analysis of how effectively hedonic property models have detected the influence of air pollution on housing prices. Probit estimates are reported describing how data, model specification, and local property market conditions in cities represented in thirty-seven studies influence the ability of hedonic models to uncover negative, statistically significant relationships between housing prices and air pollution measures. Copyright Kluwer Academic Publishers 1993Hedonic models, air pollution, meta analysis,

How important is information format? An experimental study of home energy audit programs

Among alternative regulatory responses, information provision programs are receiving increasing attention despite the decidedly mixed evidence about their effectiveness. This paper provides detailed experimental evidence to demonstrate that for one important example of an information program, the use of energy audits to stimulate residential energy conservation, the effectiveness of the program is highly sensitive to the information processing behavior of the users of the information. Simple changes in the format of the information provided to homeowners produced marked improvements in the efficiency of consumer choices. The study illustrates Stern's conclusion in a recent issue of this journal that laboratory experimentation provides a useful alternative to model-based analysis of natural experiments, especially for policy design issues involving information acquisition and processing. The paper also offers conclusions about improving the effectiveness of home energy audits, as well as the entire class of information provision programs.

The Enceladus Orbilander Mission Concept: Balancing Return and Resources in the Search for Life

Enceladus's long-lived plume of ice grains and water vapor makes accessing oceanic material readily achievable from orbit (around Saturn or Enceladus) and from the moon's surface. In preparation for the National Academies of Sciences, Engineering and Medicine 2023–2032 Planetary Science and Astrobiology Decadal Survey, we investigated four architectures capable of collecting and analyzing plume material from orbit and/or on the surface to address the most pressing questions at Enceladus: Is the subsurface ocean inhabited? Why, or why not? Trades specific to these four architectures were studied to allow an evaluation of the science return with respect to investment. The team found that Orbilander, a mission concept that would first orbit and then land on Enceladus, represented the best balance. Orbilander was thus studied at a higher fidelity, including a more detailed science operations plan during both orbital and landed phases, landing site characterization and selection analyses, and landing procedures. The Orbilander mission concept demonstrates that scientifically compelling but resource-conscious Flagship-class missions can be executed in the next decade to search for life at Enceladus

Research article - Comet 81P/Wild 2 under a microscope

The Stardust spacecraft collected thousands of particles from comet 81P/Wild 2 and returned them to Earth for laboratory study. The preliminary examination of these samples shows that the nonvolatile portion of the comet is an unequilibrated assortment of materials that have both presolar and solar system origin. The comet contains an abundance of silicate grains that are much larger than predictions of interstellar grain models, and many of these are high-temperature minerals that appear to have formed in the inner regions of the solar nebula. Their presence in a comet proves that the formation of the solar system included mixing on the grandest scales

Prediction of improvement in skin fibrosis in diffuse cutaneous systemic sclerosis: A EUSTAR analysis

none194Dobrota, Rucsandra; Maurer, Britta; Graf, Nicole; Jordan, Suzana; Mihai, Carina; Kowal-Bielecka, Otylia; Allanore, Yannick; Distler, Oliver; Cerinic, Marco Matucci; Guiducci, Serena; Walker, Ulrich; Lapadula, Giovanni; Iannone, Florenzo; Becvar, Radim; Sierakowsky, Stanislaw; Cutolo, Maurizio; Sulli, Alberto; Valentini, Gabriele; Cuomo, Giovanna; Vettori, Serena; Riemekasten, Gabriela; Siegert, Elise; Rednic, Simona; Nicoara, Ileana; Kahan, André; Vlachoyiannopoulos, P.; Montecucco, C.; Caporali, Roberto; Carreira, Patricia E.; Novak, Srdan; Czirják, László; Varju, Cecilia; Chizzolini, Carlo; Kucharz, Eugene J.; Kotulska, Anna; Kopec-Medrek, Magdalena; Widuchowska, Malgorzata; Cozzi, Franco; Rozman, Blaz; Mallia, Carmel; Coleiro, Bernard; Gabrielli, Armando; Farge, Dominique; Wu, Chen; Marjanovic, Zora; Faivre, Helene; Hij, Darin; Dhamadi, Roza; Airò, Paolo; Hesselstrand, Roger; Wollheim, Frank; Wuttge, Dirk M.; Andréasson, Kristofer; Martinovic, Duska; Balbir-Gurman, Alexandra; Braun-Moscovici, Yolanda; Trotta, F.; Monaco, Andrea Lo; Hunzelmann, Nicolas; Pellerito, Raffaele; Mauriziano, Ospedale; Bambara, Lisa Maria; Caramaschi, Paola; Black, Carol; Denton, Christopher; Damjanov, Nemanja; Henes, Jörg; Santamaria, Vera Ortiz; Heitmann, Stefan; Krasowska, Dorota; Seidel, Matthias; Burkhardt, Harald; Himsel, Andrea; Salvador, Maria J.; Da Silva, José Antonio Pereira; Stamenkovic, Bojana; Stankovic, Aleksandra; Tikly, Mohammed; Ananieva, Lidia P.; Denisov, Lev N.; Müller-Ladner, Ulf; Frerix, Marc; Tarner, Ingo; Scorza, Raffaella; Engelhart, Merete; Strauss, Gitte; Nielsen, Henrik; Damgaard, Kirsten; Mendoza, Antonio Zea; de la Puente, Carlos; Giraldo, Walter A. Sifuentes; Midtvedt, Øyvind; Reiseter, Silje; Hachulla, Eric; Launay, David; Valesini, Guido; Riccieri, Valeria; Ionescu, Ruxandra Maria; Opris, Daniela; Groseanu, Laura; Cornateanu, Roxana Sfrent; Ionitescu, Razvan; Gherghe, Ana Maria; Soare, Alina; Gorga, Marilena; Bojinca, Mihai; Schett, Georg; Distler, Jörg H.W.; Beyer, Christian; Meroni, Pierluigi; Ingegnoli, Francesca; Mouthon, Luc; Keyser, Filip De; Smith, Vanessa; Cantatore, Francesco P.; Corrado, Ada; Pozzi, Maria R.; Eyerich, Kilian; Hein, Rüdiger; Knott, Elisabeth; Wiland, Piotr; Szmyrka-Kaczmarek, Magdalena; Sokolik, Renata; Morgiel, Ewa; Madej, Marta; Krummel-Lorenz, Brigitte; Saar, Petra; Aringer, Martin; Günther, Claudia; Westhovens, Rene; de Langhe, Ellen; Lenaerts, Jan; Anic, Branimir; Baresic, Marko; Mayer, Miroslav; Radominski, Sebastião C.; de Souza Müller, Carolina; Azevedo, Valderílio F.; Agachi, Svetlana; Groppa, Liliana; Chiaburu, Lealea; Russu, Eugen; Popa, Sergei; Zenone, Thierry; Stebbings, Simon; Highton, John; Stamp, Lisa; Chapman, Peter; O'Donnell, John; Solanki, Kamal; Doube, Alan; Veale, Douglas; O'Rourke, Marie; Loyo, Esthela; Li, Mengtao; Rosato, Edoardo; Amoroso, Antonio; Gigante, Antonietta; Tanaseanu, Cristina-Mihaela; Popescu, Monica; Dumitrascu, Alina; Tiglea, Isabela; Foti, Rosario; Chirieac, Rodica; Ancuta, Codrina; Villiger, Peter; Adler, Sabine; de la Peña Lefebvre, Paloma García; Rubio, Silvia Rodriguez; Exposito, Marta Valero; Sibilia, Jean; Chatelus, Emmanuel; Gottenberg, Jacques Eric; Chifflot, Hélène; Litinsky, Ira; Venalis, Algirdas; Butrimiene, Irena; Venalis, Paulius; Rugiene, Rita; Karpec, Diana; Saketkoo, Lesley Ann; Lasky, Joseph A.; Kerzberg, Eduardo; Montoya, Fabiana; Cosentino, Vanesa; Limonta, Massimiliano; Brucato, Antonio Luca; Lupi, Elide; Spertini, François; Ribi, Camillo; Buss, Guillaume; Pasquali, Jean Louis; Martin, Thierry; Gorse, AudreyDobrota, Rucsandra; Maurer, Britta; Graf, Nicole; Jordan, Suzana; Mihai, Carina; Kowal Bielecka, Otylia; Allanore, Yannick; Distler, Oliver; Cerinic, Marco Matucci; Guiducci, Serena; Walker, Ulrich; Lapadula, Giovanni; Iannone, Florenzo; Becvar, Radim; Sierakowsky, Stanislaw; Cutolo, Maurizio; Sulli, Alberto; Valentini, Gabriele; Cuomo, Giovanna; Vettori, Serena; Riemekasten, Gabriela; Siegert, Elise; Rednic, Simona; Nicoara, Ileana; Kahan, André; Vlachoyiannopoulos, P.; Montecucco, Carlomaurizio; Caporali, Roberto; Carreira, Patricia E.; Novak, Srdan; Czirják, László; Varju, Cecilia; Chizzolini, Carlo; Kucharz, Eugene J.; Kotulska, Anna; Kopec Medrek, Magdalena; Widuchowska, Malgorzata; Cozzi, Franco; Rozman, Blaz; Mallia, Carmel; Coleiro, Bernard; Gabrielli, Armando; Farge, Dominique; Wu, Chen; Marjanovic, Zora; Faivre, Helene; Hij, Darin; Dhamadi, Roza; Airò, Paolo; Hesselstrand, Roger; Wollheim, Frank; Wuttge, Dirk M.; Andréasson, Kristofer; Martinovic, Duska; Balbir Gurman, Alexandra; Braun Moscovici, Yolanda; Trotta, F.; Monaco, Andrea Lo; Hunzelmann, Nicolas; Pellerito, Raffaele; Mauriziano, Ospedale; Bambara, Lisa Maria; Caramaschi, Paola; Black, Carol; Denton, Christopher; Damjanov, Nemanja; Henes, Jörg; Santamaria, Vera Ortiz; Heitmann, Stefan; Krasowska, Dorota; Seidel, Matthias; Burkhardt, Harald; Himsel, Andrea; Salvador, Maria J.; Da Silva, José Antonio Pereira; Stamenkovic, Bojana; Stankovic, Aleksandra; Tikly, Mohammed; Ananieva, Lidia P.; Denisov, Lev N.; Müller Ladner, Ulf; Frerix, Marc; Tarner, Ingo; Scorza, Raffaella; Engelhart, Merete; Strauss, Gitte; Nielsen, Henrik; Damgaard, Kirsten; Mendoza, Antonio Zea; de la Puente, Carlos; Giraldo, Walter A. Sifuentes; Midtvedt, Øyvind; Reiseter, Silje; Hachulla, Eric; Launay, David; Valesini, Guido; Riccieri, Valeria; Ionescu, Ruxandra Maria; Opris, Daniela; Groseanu, Laura; Cornateanu, Roxana Sfrent; Ionitescu, Razvan; Gherghe, Ana Maria; Soare, Alina; Gorga, Marilena; Bojinca, Mihai; Schett, Georg; Distler, Jörg H. W.; Beyer, Christian; Meroni, Pierluigi; Ingegnoli, Francesca; Mouthon, Luc; Keyser, Filip De; Smith, Vanessa; Cantatore, Francesco P.; Corrado, Ada; Pozzi, Maria R.; Eyerich, Kilian; Hein, Rüdiger; Knott, Elisabeth; Wiland, Piotr; Szmyrka Kaczmarek, Magdalena; Sokolik, Renata; Morgiel, Ewa; Madej, Marta; Krummel Lorenz, Brigitte; Saar, Petra; Aringer, Martin; Günther, Claudia; Westhovens, Rene; de Langhe, Ellen; Lenaerts, Jan; Anic, Branimir; Baresic, Marko; Mayer, Miroslav; Radominski, Sebastião C.; de Souza Müller, Carolina; Azevedo, Valderílio F.; Agachi, Svetlana; Groppa, Liliana; Chiaburu, Lealea; Russu, Eugen; Popa, Sergei; Zenone, Thierry; Stebbings, Simon; Highton, John; Stamp, Lisa; Chapman, Peter; O'Donnell, John; Solanki, Kamal; Doube, Alan; Veale, Douglas; O'Rourke, Marie; Loyo, Esthela; Li, Mengtao; Rosato, Edoardo; Amoroso, Antonio; Gigante, Antonietta; Tanaseanu, Cristina Mihaela; Popescu, Monica; Dumitrascu, Alina; Tiglea, Isabela; Foti, Rosario; Chirieac, Rodica; Ancuta, Codrina; Villiger, Peter; Adler, Sabine; de la Peña Lefebvre, Paloma García; Rubio, Silvia Rodriguez; Exposito, Marta Valero; Sibilia, Jean; Chatelus, Emmanuel; Gottenberg, Jacques Eric; Chifflot, Hélène; Litinsky, Ira; Venalis, Algirdas; Butrimiene, Irena; Venalis, Paulius; Rugiene, Rita; Karpec, Diana; Saketkoo, Lesley Ann; Lasky, Joseph A.; Kerzberg, Eduardo; Montoya, Fabiana; Cosentino, Vanesa; Limonta, Massimiliano; Brucato, Antonio Luca; Lupi, Elide; Spertini, François; Ribi, Camillo; Buss, Guillaume; Pasquali, Jean Louis; Martin, Thierry; Gorse, Audre

Outcomes of patients with systemic sclerosis treated with rituximab in contemporary practice: a prospective cohort study.

Objective To assess the safety and efficacy of rituximab in systemic sclerosis (SSc) in clinical practice. Methods We performed a prospective study including patients with SSc from the European Scleroderma Trials and Research (EUSTAR) network treated with rituximab and matched with untreated patients with SSc. The main outcomes measures were adverse events, skin fibrosis improvement, lung fibrosis worsening and steroids use among propensity score-matched patients treated or not with rituximab. Results 254 patients were treated with rituximab, in 58% for lung and in 32% for skin involvement. After a median follow-up of 2 years, about 70% of the patients had no side effect. Comparison of treated patients with 9575 propensity-score matched patients showed that patients treated with rituximab were more likely to have skin fibrosis improvement (22.7 vs 14.03 events per 100 person-years; OR: 2.79 [1.47-5.32]; p=0.002). Treated patients did not have significantly different rates of decrease in forced vital capacity (FVC)>10% (OR: 1.03 [0.55-1.94]; p=0.93) nor in carbon monoxide diffusing capacity (DLCO) decrease. Patients having received rituximab were more prone to stop or decrease steroids (OR: 2.34 [1.56-3.53], p<0.0001). Patients treated concomitantly with mycophenolate mofetil had a trend for better outcomes as compared with patients receiving rituximab alone (delta FVC: 5.22 [0.83-9.62]; p=0.019 as compared with controls vs 3 [0.66-5.35]; p=0.012). Conclusion Rituximab use was associated with a good safety profile in this large SSc-cohort. Significant change was observed on skin fibrosis, but not on lung. However, the limitation is the observational design. The potential stabilisation of lung fibrosis by rituximab has to be addressed by a randomised trial