pinecone/core-2020-05-10-deduplication huggingface dataset:
The abundance and thermal history of water ice in the disk surrounding HD 142527 from the DIGIT Herschel Key Program

Support for this work, part of the Herschel Open Time Key Project Program, was provided by NASA through an award issued by the Jet Propulsion Laboratory, California Institute of Technology. M.M. acknowledges funding from the EU FP7- 2011 under Grant Agreement No. 284405.Context. The presence or absence of ice in protoplanetary disks is of great importance to the formation of planets. By enhancing solid surface density and increasing sticking efficiency, ice catalyzes the rapid formation of planetesimals and decreases the timescale of giant planet core accretion. Aims. In this paper, we analyze the composition of the outer disk around the Herbig star HD 142527. We focus on the composition of water ice, but also analyze the abundances of previously proposed minerals. Methods. We present new Herschel far-infrared spectra and a re-reduction of archival data from the Infrared Space Observatory (ISO). We modeled the disk using full 3D radiative transfer to obtain the disk structure. Also, we used an optically thin analysis of the outer disk spectrum to obtain firm constraints on the composition of the dust component. Results. The water ice in the disk around HD 142527 contains a large reservoir of crystalline water ice. We determine the local abundance of water ice in the outer disk (i.e., beyond 130 AU). The re-reduced ISO spectrum differs significantly from that previously published, but matches the new Herschel spectrum at their common wavelength range. In particular, we do not detect any significant contribution from carbonates or hydrous silicates, in contrast to earlier claims. Conclusions. The amount of water ice detected in the outer disk requires ~80% of oxygen atoms. This is comparable to the water ice abundance in the outer solar system, comets, and dense interstellar clouds. The water ice is highly crystalline while the temperatures where we detect it are too low to crystallize the water on relevant timescales. We discuss the implications of this finding.Publisher PDFPeer reviewe
A new sample of X-ray selected narrow emission-line galaxies. II.
  Looking for True Seyfert 2

A sample of X-ray and optically selected narrow emission-line galaxies (769
sources) from the 3XMM catalogue cross-correlated with SDSS (DR9) catalogue has
been studied. Narrow-emission line active galactic nuclei (AGN; type-2) have
been selected on the basis of their emission line ratios and/or X-ray
luminosity. We have looked for X-ray unobscured type-2 AGN. As X-ray spectra
were not available for our whole sample, we have checked the reliability of
using the X-ray hardness ratio (HR) as a probe of the level of obscuration and
we found a very good agreement with full spectral fitting results, with only 2%
of the sources with apparently unobscured HR turning out to have an obscured
spectrum. Despite the fact that type-2 AGN are supposed to be absorbed based on
the Unified Model, about 60% of them show no sign or very low level of X-ray
obscuration. After subtraction of contaminants to the sample, that is
Narrow-Line Seyfert 1 and Compton-thick AGN, the fraction of unobscured Sy2
drops to 47%. For these sources, we were able to rule out dust reddening and
variability for most of them as an explanation of the absence of optical broad
emission-lines. The main explanations remaining are the dilution of weak/very
broad emission-lines by the host galaxy and the intrinsic absence of the
broad-line region (BLR) due to low accretion rates (i.e. True Sy2). However,
the number of True Sy2 strongly depends on the method used to verify the
intrinsic lack of broad lines. Indeed using the optical continuum luminosity to
predict the BLR properties gives a much larger fraction of True Sy2 (about 90\%
of the unobscured Sy2 sample) than the use of the X-ray 2 keV luminosity (about
20%). Nevertheless the number of AGN we securely detected as True Sy2 is at
least three times larger that the previously confirmed number of True Sy2.Comment: 10 pages, 10 figures, accepted for publication in A&
Exclusive J/psi and Upsilon photoproduction and the low x gluon

We discuss the potential to constrain the small-$x$ PDFs using the exclusive
production of heavy vector mesons. The calculation of $J/\psi$ and $\Upsilon$
photoproduction at NLO in collinear factorisation is described. The different
behaviour of the NLO corrections for $J/\psi$ and $\Upsilon$ is highlighted and
we outline what might be expected from the inclusion of these processes in a
PDF fit.Comment: 10 pages, 2 figures. To appear in the proceedings of `XXIV
  International Workshop on Deep-Inelastic Scattering and Related Subjects
  (DIS2016)', Hamburg (Germany), April 201
Discovery of a low-mass companion inside the debris ring surrounding the F5V star HD 206893

<BR /> Aims: Uncovering the ingredients and the architecture of planetary systems is a very active field of research that has fuelled many new theories on giant planet formation, migration, composition, and interaction with the circumstellar environment. We aim at discovering and studying new such systems, to further expand our knowledge of how low-mass companions form and evolve. <BR /> Methods: We obtained high-contrast H-band images of the circumstellar environment of the F5V star HD 206893, known to host a debris disc never detected in scattered light. These observations are part of the SPHERE High Angular Resolution Debris Disc Survey (SHARDDS) using the InfraRed Dual-band Imager and Spectrograph (IRDIS) installed on VLT/SPHERE. <BR /> Results: We report the detection of a source with a contrast of 3.6 × 10[SUP]-5[/SUP] in the H-band, orbiting at a projected separation of 270 milliarcsec or 10 au, corresponding to a mass in the range 24 to 73 M[SUB]Jup[/SUB] for an age of the system in the range 0.2 to 2 Gyr. The detection was confirmed ten months later with VLT/NaCo, ruling out a background object with no proper motion. A faint extended emission compatible with the disc scattered light signal is also observed. <BR /> Conclusions: The detection of a low-mass companion inside a massive debris disc makes this system an analog of other young planetary systems such as β Pictoris, HR 8799 or HD 95086 and requires now further characterisation of both components to understand their interactions.Peer reviewe
Would raising the total cholesterol diagnostic cut-off from 7.5mmol/L to 9.3mmol/L improve detection rate of patients with monogenic familial hypercholesterolaemia?

© 2015 The Authors. A previous report suggested that 88% of individuals in the general population with total cholesterol (TC)>9.3mmol/L have familial hypercholesterolaemia (FH). We tested this hypothesis in a cohort of 4896 UK civil servants, mean (SD) age 44 (±6) years, using next generation sequencing to achieve a comprehensive genetic diagnosis. 25 (0.5%) participants (mean age 49.2 years) had baseline TC>9.3mmol/L, and overall we found an FH-causing mutation in the LDLR gene in seven (28%) subjects. The detection rate increased to 39% by excluding eight participants with triglyceride levels over 2.3mmol/L, and reached 75% in those with TC>10.4mmol/L. By extrapolation, the detection rate would be ~25% by including all participants with TC>8.6mmol/L (2.5 standard deviations from the mean). Based on the 1/500 FH frequency, 30% of all FH-cases in this cohort would be missed using the 9.3mmol/L cut-off. Given that an overall detection rate of 25% is considered economically acceptable, these data suggest that a diagnostic TC cut-off of 8.6mmol/L, rather than 9.3mmol/L would be clinically useful for FH in the general population
Displaced vertices and long-lived charged particles in the NMSSM with right-handed sneutrinos.

We study LHC signatures of displaced vertices and long-lived charged particles within the context of the Next-to-Minimal Supersymmetric Standard Model with right-handed (RH) sneutrinos. In this construction the RH neutrino can be produced directly from Higgs decays or in association with a RH sneutrino when the latter is the lightest supersymmetric particle. The RH neutrino is generally long-lived, since its decay width is proportional to the neutrino Yukawa, a parameter which is predicted to be small. The RH neutrino late decay can therefore give rise to displaced vertices at the LHC, which can be identified through the decay products, which involve two leptons (2ℓ + https://static-content.springer.com/image/art%3A10.1007%2FJHEP05%282014%29035/MediaObjects/13130_2014_8145_Figa_HTML.gifT ) or a lepton with two jets (ℓjj). We simulate this signal for the current LHC configuration (a centre of mass of 8 TeV and an integrated luminosity of  LL  = 20 fb−1), and a future one (13 TeV and  LL  = 100 fb−1). We show that a region of the parameter space of this model can be probed and that the RH neutrino mass can be reconstructed from the end-point of the two-lepton invariant mass distribution or the central value of the mass distribution for two jets plus one lepton. Another exotic signature of this construction is the production of a long-lived stau. If the stau is the next-to-lightest supersymmetric particle, it can decay through diagrams involving the small neutrino Yukawa, and would escape the detector leaving a characteristic trail. We also simulate this signal for various benchmark points and show that the model can be within the reach of the future run of the LHC
Study of Z boson production in pPb collisions at √sNN = 5.02 TeV

© 2016 The Author.The production of Z bosons in pPb collisions at sNN=5.02 TeV is studied by the CMS experiment via the electron and muon decay channels. The inclusive cross section is compared to pp collision predictions, and found to scale with the number of elementary nucleon-nucleon collisions. The differential cross sections as a function of the Z boson rapidity and transverse momentum are measured. Though they are found to be consistent within uncertainty with theoretical predictions both with and without nuclear effects, the forward-backward asymmetry suggests the presence of nuclear effects at large rapidities. These results provide new data for constraining nuclear parton distribution functions
Pre-Capillary, Combined, and Post-Capillary Pulmonary Hypertension: A Pathophysiological Continuum

BACKGROUND: Pulmonary hypertension (PH) is hemodynamically classified as pre-capillary (as seen in idiopathic pulmonary arterial hypertension [IPAH]) or post-capillary (as seen in heart failure with preserved ejection fraction [HFpEF]). Overlaps between these conditions exist. Some patients present with risk factors for left heart disease but pre-capillary PH, whereas patients with HFpEF may have combined pre- and post-capillary PH. OBJECTIVES: This study sought to further characterize similarities and differences among patient populations with either PH-HFpEF or IPAH. METHODS: We used registry data to analyze clinical characteristics, hemodynamics, and treatment responses in patients with typical IPAH (<3 risk factors for left heart disease; n = 421), atypical IPAH (≥3 risk factors for left heart disease; n = 139), and PH-HFpEF (n = 226) receiving PH-targeted therapy. RESULTS: Compared with typical IPAH, patients with atypical IPAH and PH-HFpEF were older, had a higher body mass index, had more comorbidities, and had a lower 6-min walking distance, whereas mean pulmonary artery pressure (46.9 ± 13.3 mm Hg vs. 43.9 ± 10.7 mm Hg vs. 45.7 ± 9.4 mm Hg, respectively) and cardiac index (2.3 ± 0.8 l/min/m(2) vs. 2.2 ± 0.8 l/min/m(2) vs. 2.2 ± 0.7 l/min/m(2), respectively) were comparable among groups. After initiation of targeted PH therapies, all groups showed improvement in exercise capacity, functional class, and natriuretic peptides from baseline to 12 months, but treatment effects were less pronounced in patients with PH-HFpEF than typical IPAH; with atypical IPAH in between. Survival rates at 1, 3, and 5 years were almost identical for the 3 groups. CONCLUSIONS: Patients with atypical IPAH share features of both typical IPAH and PH-HFpEF, suggesting that there may be a continuum between these conditions
Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 8 TeV pp collisions with the ATLAS detector

A search for the direct production of charginos and neutralinos in final states with three leptons and missing transverse momentum is presented. The analysis is based on 20.3 fb[superscript −1] of s√ = 8 TeV proton-proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with the Standard Model expectations and limits are set in R-parity-conserving phenomenological Minimal Supersymmetric Standard Models and in simplified supersymmetric models, significantly extending previous results. For simplified supersymmetric models of direct chargino (χ˜±1) and next-to-lightest neutralino (χ˜02) production with decays to lightest neutralino (χ˜01) via either all three generations of sleptons, staus only, gauge bosons, or Higgs bosons, (χ˜±1) and (χ˜02) masses are excluded up to 700 GeV, 380 GeV, 345 GeV, or 148 GeV respectively, for a massless (χ˜01) .United States. Dept. of Energ
Search for FCNC single top-quark production at √s = 7 TeV with the ATLAS detector

A search for the production of single top-quarks via flavour-changing neutral-currents is presented. Data collected with the ATLAS detector at a centre-of-mass energy of √s = 7 TeV, corresponding to an integrated luminosity of 2.05 fb[superscript −1], are used. Candidate events with a semileptonic top-quark decay signature are classified as signal- or background-like events by using several kinematic variables as input to a neural network. No signal is observed in the neural network output distribution and a Bayesian upper limit is placed on the production cross-section. The observed upper limit at 95% confidence level on the cross-section multiplied by the t→Wb branching fraction is measured to be σ[subscript qg→t]×B(t→Wb)<3.9 pb. This upper limit is converted using a model-independent approach into upper limits on the coupling strengths κ[subscript ugt]/Λ<6.9⋅10[superscript −3] TeV[superscript −1] and κ[subscript cgt]/Λ<1.6⋅10[superscript −2] TeV[superscript −1], where Λ is the new physics scale, and on the branching fractions B(t→ug)<5.7⋅10[superscript −5] and B(t→cg)<2.7⋅10[superscript −4].European Organization for Nuclear ResearchUnited States. Dept. of EnergyNational Science Foundation (U.S.)Brookhaven National Laborator
Matching Measure, Benjamini–Schramm Convergence and the Monomer–Dimer Free Energy

We define the matching measure of a lattice L as the spectral measure of the tree of self-avoiding walks in L. We connect this invariant to the monomer–dimer partition function of a sequence of finite graphs converging to L. This allows us to express the monomer–dimer free energy of L in terms of the matching measure. Exploiting an analytic advantage of the matching measure over the Mayer series then leads to new, rigorous bounds on the monomer–dimer free energies of various Euclidean lattices. While our estimates use only the computational data given in previous papers, they improve the known bounds significantly.Alfréd Rényi Institute of Mathematics. “Lendület” Groups and Graphs Research GroupNational Science Foundation (U.S.) (Grant DMS-1500219
Resonant regeneration in the sub-quantum regime - a demonstration of fractional quantum interference

Light shining through wall experiments (in the optical as well as in the microwave regime) are a powerful tool to search for light particles coupled very weakly to photons such as axions or extra hidden sector photons. Resonant regeneration, where a resonant cavity is employed to enhance the regeneration rate of photons, is one of the most promising techniques to improve the sensitivity of the next generation of experiments. However, doubts have been voiced if such methods work at very low regeneration rates where on average the cavity contains less than one photon. In this Letter we report on a demonstration experiment using a microwave cavity driven with extremely low power, to show that resonant amplification works also in this regime. In accordance with standard quantum mechanics this is a demonstration that interference also works at the level of less than one quantum. As an additional benefit this experiment shows that thermal photons inside the cavity cause no adverse effects.John G. Hartnett, Joerg Jaeckel, Rhys G. Povey, Michael E. Toba
Multi-parametric analysis of strongly inhomogeneous periodic waveguideswith internal cutoff frequencies

In this paper, we consider periodic waveguides in the shape of a inhomogeneous string or beam partially supported by a uniform elastic Winkler foundation. A multi-parametric analysis is developed to take into account the presence of internal cutoff frequencies and strong contrast of the problem parameters. This leads to asymptotic conditions supporting non-typical quasi-static uniform or, possibly, linear microscale displacement variations over the high-frequency domain. Macroscale governing equations are derived within the framework of the Floquet-Bloch theory as well as using a high-frequency-type homogenization procedure adjusted to a string with variable parameters. It is found that, for the string problem, the associated macroscale equation is the same as that applying to a string resting on a Winkler foundation. Remarkably, for the beam problem, the macroscale behavior is governed by the same equation as for a beam supported by a two-parameter Pasternak foundation
Flavour-changing neutral currents and leptophobic Z′ gauge bosons

AbstractLeptophobic Z′ gauge bosons can appear in models with an E6 gauge symmetry. We show that flavour-changing neutral currents can be generated in some of these models due to the mixing of the ordinary dR, sR and bR quark fields with the exotic hR. Because the Z′ does not couple to charged leptons, the constraints on the flavour-changing couplings UZ′db and UZ′sb are relatively weak. Indeed, B0q–B̄0q mixing (q=d,s) can be dominated by Z′ exchange, which will affect CP-violating rate asymmetries in B decays. Rare hadronic B decays can also be affected, while decays involving charged leptons will be unchanged
Synthesis, structure and electrochemical behavior of new RPONOP (R=tBu, iPr) pincer complexes of Fe2+, Co2+, Ni2+, and Zn2+ ions

AbstractThe coordination chemistry of the M2+ ions of the first-row elements iron, cobalt, nickel and zinc was explored with the ligands RPONOP (2,6-(R2PO)(C5H3N), R=iPr and tBu). Syntheses and characterization of the complexes Fe(RPONOP)Br2, Co(tBuPONOP)Cl2, Ni(RPONOP)I2 and Zn(RPONOP)I2 (R=tBu, iPr) are reported together with the crystal structures of Fe(RPONOP)Br2 (R=iPr and tBu), Co(tBuPONOP)Cl2, Co(iPrPONOP)Cl(μ-Cl)CoCl2(THF), Ni(iPrPONOP)I2, Zn(iPrPONOP)I2 and of the oxidation product Zn[tBuP(O)ONOP(O)]I2 resulting from the reaction with oxygen. The electrochemical behavior of the M(tBuPONOP)X2 complexes has been investigated in acetonitrile. While the nickel compound is stable, all the complexes are sensitive to dissociation of the RPONOP ligand or ligand scrambling in strongly coordinating media. Catalytic activity in formic acid dehydrogenation with TONs up to 1143 has been found for Ni(tBuPONOP)I2
Neutral modes of a two-dimensional vortex and their link to persistent cat's eyes

This paper considers the relaxation of a smooth two--dimensional vortex to axisymmetry after the application of an instantaneous, weak external strain field. In this limit the disturbance decays exponentially in time at a rate that is linked to a pole of the associated linear inviscid problem (known as a Landau pole). As a model of a typical vortex distribution that can give rise to cat's eyes, here distributions are examined that have a basic Gaussian shape but whose profiles have been artificially flattened about some radius r_c. A numerical study of the Landau poles for this family of vortices shows that as r_c$ is varied so the decay rate of the disturbance moves smoothly between poles as the decay rates of two Landau poles cross.\ud
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Cat's eyes that occur in the nonlinear evolution of a vortex lead to an axisymmetric azimuthally averaged profile with an annulus of approximately uniform vorticity, rather like the artificially flattened profiles investigated. Based on the stability of such profiles it is found that finite thickness cat's eyes can persist (i.e. the mean profile has a neutral mode) at two distinct radii, and in the limit of a thin flattened region the result that vanishingly thin cat's eyes only persist at a single radius is recovered. The decay of non--axisymmetric perturbations to these flattened profiles for larger times is investigated and a comparison made with the result for a Gaussian profile
Significance of tension for gravitating masses in Kaluza–Klein models

AbstractIn this Letter, we consider the six-dimensional Kaluza–Klein models with spherical compactification of the internal space. Here, we investigate the case of bare gravitating compact objects with the dustlike equation of state pˆ0=0 in the external (our) space and an arbitrary equation of state pˆ1=Ωεˆ in the internal space, where εˆ is the energy density of the source. This gravitating mass is spherically symmetric in the external space and uniformly smeared over the internal space. In the weak field approximation, the conformal variations of the internal space volume generate the admixture of the Yukawa potential to the usual Newtonʼs gravitational potential. For sufficiently large Yukawa masses, such admixture is negligible and the metric coefficients of the external spacetime coincide with the corresponding expressions of General Relativity. Then, these models satisfy the classical gravitational tests. However, we show that gravitating masses acquire effective relativistic pressure in the external space. Such pressure contradicts the observations of compact astrophysical objects (e.g., the Sun). The equality Ω=−1/2 (i.e. tension) is the only possibility to preserve the dustlike equation of state in the external space. Therefore, in spite of agreement with the gravitational experiments for an arbitrary value of Ω, tension (Ω=−1/2) plays a crucial role for the considered models