The MURALES survey Speranza, G; Balmaverde, B; Capetti, A ...
Astronomy and astrophysics (Berlin),
09/2021, Letnik:
653
Journal Article
Recenzirano
Odprti dostop
We analyze VLT/MUSE observations of 37 radio galaxies from the Third Cambridge catalogue (3C) with redshift < 0.3 searching for nuclear outflows of ionized gas. These observations are part of the ...MURALES project (a MUse RAdio Loud Emission line Snapshot survey), whose main goal is to explore the feedback process in the most powerful radio-loud AGN. We applied a nonparametric analysis to the O III λ5007 emission line, whose asymmetries and high-velocity wings reveal signatures of outflows. We find evidence of nuclear outflows in 21 sources, with velocities between ∼400 and 1000 km s−1, outflowing masses of ∼105 − 107 M⊙, and a kinetic energy in the range ∼1053 − 1056 erg. In addition, evidence for extended outflows is found in the 2D gas velocity maps of 13 sources of the subclasses of high-excitation (HEG) and broad-line (BLO) radio galaxies, with sizes between 0.4 and 20 kpc. We estimate a mass outflow rate in the range 0.4–30 M⊙ yr−1 and an energy deposition rate of Ėkin ∼ 1042 − 1045 erg s−1. Comparing the jet power, the nuclear luminosity of the active galactic nucleus, and the outflow kinetic energy rate, we find that outflows of HEGs and BLOs are likely radiatively powered, while jets likely only play a dominant role in galaxies with low excitation. The low loading factors we measured suggest that these outflows are driven by momentum and not by energy. Based on the gas masses, velocities, and energetics involved, we conclude that the observed ionized outflows have a limited effect on the gas content or the star formation in the host. In order to obtain a complete view of the feedback process, observations exploring the complex multiphase structure of outflows are required.
Dengue virus (DENV) is a mosquito-borne human pathogen endemic in 129 countries. In Italy, presence of the competent vector increases the risk of autochthonous transmission from imported cases, and a ...surveillance national plan for Arboviruses (PNA 2020-2025) is in place. The results of laboratory diagnosis of DENV in Italy from November 2015 to November 2021 are presented.
Samples from 502 suspected DENV cases were tested by both molecular/antigen NS1 and serological assays, including Plaque Reduction Neutralization Test (PRNT). Samples were tested in parallel for DENV, Chikungunya (CHIKV)and Zika virus (ZIKV). Cases were classified based on laboratory results according to the Italian National Plan for Arboviruses (PNA) criteria.
After evaluation of laboratory results, there were 140/502 confirmed and 7/502 probable cases (DENV cases). A positive molecular test was found in 27.1% of cases and 66.7% had a positive antigen NS1 test. The lag time from symptoms to collection was 4 and 6 days, respectively, with a higher range of day detection limit for antigen NS1. DENV cases gave 87.8% IgM and 82.9% PRNT positive/border line results: samples positivity of 72.20% and 33.9% in IgM and PRNT, respectively, was observed within the first 7 days of disease. Overall, 10.9% IgM positive results were not confirmed as positive in PRNT or molecular test among excluded cases (274/502). 26/502 suspected cases were both DENV and ZIKV positive by IgM and/or PRNT, making it difficult to provide a final differential diagnosis. None had a possible co-infection of DENV and CHIKV.
DENV diagnosis by molecular/antigen tests is the gold standard but the sample collection time is a limitation. Serological tests are thus necessary. However, IgM results need PRNT confirmation. Co-circulation of DENV and ZIKV increases diagnostic difficulty. Continuous evaluation of diagnostic strategies is essential against future DENV autochthonous outbreaks.
This study aims to identify clinical and socio-demographic variables associated with the outcome of vocational rehabilitation programs (VRPs). All users of an Italian Community Mental Health Centre ...(CMHC) included in VRPs delivered according to the model of Supported Employment in years 2011–2016 were retrospectively enrolled. Fifty users who ended the program with employment were compared with fifty users who dropped out, with respect to clinical and socio-demographic variables. VRPs lasting less than 6 months and oriented toward the competitive labor market had a higher probability of employment. Among users who successfully ended the VRP, the median of health interventions significantly decreased after employment. In the same group of users, less non-health interventions strictly linked to the VRP were required, when compared with users who dropped out. We conclude that employment is associated with improvement of users’ clinical conditions and reduced workload for the CMHC.
A considerable number of studies has been conducted on switchgrass (Panicum virgatum L.) as a bioresource for energy over the last few years. Nonetheless, some important issues concerning the ...agro-technique are still open. This research examines the long-term total dry matter yield (TDM) and ash content of two lowland (L) and two upland (U) switchgrass cytotypes, as affected by one or two-cut system, under southern EU climatic conditions (44°33′ N). Overall, L produced higher TDM than U (on average 14.9 and 11.7Mgha−1, respectively); two-cut system allowed to produce higher biomass yields (especially in U) than single harvest during the two first years, but it also drastically reduced plant vigour and productivity of all cytotypes in the following two years. Moreover, under two-cut system almost total seasonal biomass derived from the early harvest, while the second cut slightly contributed to the total seasonal biomass, nor it appeared to offset the additional harvest costs. Biomass quality was also significantly affected by cutting frequency, with two-cut system leading to a considerably higher ash content of biomass. Therefore, it is perceived that two-cut system is not worthwhile with U and L cytotypes as bioresource for energy production under southern EU conditions.
We study the cosmological evolution of an induced gravity model with a self-interacting scalar field σ and in the presence of matter and radiation. Such model leads to Einstein gravity plus a ...cosmological constant as a stable attractor among homogeneous cosmologies and is therefore a viable dark-energy (DE) model for a wide range of scalar field initial conditions and values for its positive γ coupling to the Ricci curvature γσ2R.
Abstract
We present the analysis of X-ray and optical observations of gas filaments observed in the radio source 3CR 318.1, associated with NGC 5920, the brightest cluster galaxy (BCG) of MKW 3 s, a ...nearby cool core galaxy cluster. This work is one of the first X-ray and optical analyses of filaments in cool core clusters carried out using MUSE observations. We aim at identifying the main excitation processes responsible for the emission arising from these filaments. We complemented the optical VLT/MUSE observations, tracing the colder gas phase, with X-ray Chandra observations of the hotter highly ionized gas phase. Using the MUSE observations, we studied the emission line intensity ratios along the filaments to constrain the physical processes driving the excitation, and, using the Chandra observations, we carried out a spectral analysis of the gas along these filaments. We found a spatial association between the X-ray and optical morphology of these filaments, which are colder and have lower metal abundance than the surrounding intracluster medium (ICM), as already seen in other BCGs. Comparing with previous results from the literature for other BCGs, we propose that the excitation process that is most likely responsible for these filaments emission is a combination of star formation and shocks, with a likely contribution from self-ionizing, cooling ICM. Additionally, we conclude that the filaments most likely originated from AGN-driven outflows in the direction of the radio jet.
The MURALES survey Balmaverde, B.; Capetti, A.; Marconi, A. ...
Astronomy and astrophysics (Berlin),
11/2018, Letnik:
619
Journal Article
Recenzirano
Odprti dostop
We observed the FR II radio galaxy 3C 459 (z = 0.22) with the MUSE spectrograph at the Very Large Telescope (VLT) as part of the MURALES project (a MUse RAdio Loud Emission line Snapshot survey). We ...detected diffuse nuclear emission and a filamentary ionized gas structure forming a one-sided, triangular-shaped region extending out to ∼80 kpc. The central emission line region is dominated by two compact knots of similar flux: the first (N1) cospatial with the radio core and the (N2) second located 1″.2 (5.3 kpc) to the SE. The two regions differ dramatically from the point of view of velocity (with an offset of ∼400 km s−1), line widths, and line ratios. This suggests that we are observing a dual AGN system formed by a radio loud AGN and type 2 QSO companion, which is the result of the recent merger that also produced its disturbed host morphology. The alternative possibility that N2 is just a bright emission line knot resulting from, for example, a jet-cloud interaction, is disfavored because of (1) the presence of a high ionization bicone whose apex is located at N2; (2) the observed narrow line widths; (3) its line luminosity (∼1042 erg s−1) typical of luminous QSOs; and (4) its location, which is offset from the jet path. The putative secondary AGN must be highly obscured, since we do not detect any emission in the Chandra and infrared Hubble Space Telescope images.
We investigated the interstellar medium (ISM) properties in the central regions of nearby Seyfert galaxies characterised by prominent conical or bi-conical outflows belonging to the MAGNUM survey by ...exploiting the unprecedented sensitivity, spatial and spectral coverage of the integral field spectrograph MUSE at the Very Large Telescope. We developed a novel approach based on the gas and stars kinematics to disentangle high-velocity gas in the outflow from gas in the disc to spatially track the differences in their ISM properties. This allowed us to reveal the presence of an ionisation structure within the extended outflows that can be interpreted with different photoionisation and shock conditions, and to trace tentative evidence of outflow-induced star formation (“positive” feedback) in a galaxy of the sample, Centaurus A.
PDF
