Redshift identification of X-ray-selected active galactic nuclei in the J1030 field: searching for large-scale structures and high-redshift sources

We publicly release the spectroscopic and photometric redshift catalog of the sources detected with Chandra in the field of the z = 6.3 quasar SDSS J1030+0525. This is currently the fifth-deepest extragalactic X-ray field, and reaches a 0.5 2 keV flux limit of f0:5-2 = 6 × 10-17 erg s-1 cm-2. Using two independent methods, we measure a photometric redshift for 243 objects, while 123 (51%) sources also have a spectroscopic redshift, 110 of which come from an INAF-Large Binocular Telescope (LBT) Strategic Program.We use the spectroscopic redshifts to determine the quality of the photometric ones, and find it to be in agreement with that of other X-ray surveys which used a similar number of photometric data points. In particular, we measure a sample normalized median absolute deviation of NMAD = 1.48 × median(||zphot - zspec||/(1 + zspec)) = 0.065. We use these new spectroscopic and photometric redshifts to study the properties of the Chandra J1030 field.We observe several peaks in our spectroscopic redshift distribution between z = 0.15 and z = 1.5, and find that the sources in each peak are often distributed across the whole Chandra field of view. This confirms that X-ray-selected AGNs can efficiently track large-scale structures over physical scales of several megaparsecs. Finally, we computed the Chandra J1030 z > 3 number counts: while the spectroscopic completeness of our sample is limited at high redshift, our results point towards a potential source excess at z ≥ 4, which we plan to either confirm or reject in the near future with dedicated spectroscopic campaigns

Redshift identification of X-ray selected active galactic nuclei in the J1030 field: searching for large-scale structures and high-redshift sources

We publicly release the spectroscopic and photometric redshift catalog of the sources detected with Chandra in the field of the $z$=6.3 quasar SDSS J1030+0525. This is currently the fifth deepest X-ray field, and reaches a 0.5-2 keV flux limit $f_{\rm 0.5-2}$=6$\times$10$^{-17}$ erg s$^{-1}$ cm$^{-2}$. By using two independent methods, we measure a photometric redshift for 243 objects, while 123 (51%) sources also have a spectroscopic redshift, 110 of which coming from an INAF-Large Binocular Telescope (LBT) Strategic Program. We use the spectroscopic redshifts to determine the quality of the photometric ones, and find it in agreement with that of other X-ray surveys which used a similar number of photometric data-points. In particular, we measure a sample normalized median absolute deviation $\sigma_{NMAD}$=1.48||$z_{phot}$-$z_{spec}$||/(1+$z_{spec}$)=0.065. We use these new spectroscopic and photometric redshifts to study the properties of the Chandra J1030 field. We observe several peaks in our spectroscopic redshift distribution between $z$=0.15 and $z$=1.5, and find that the sources in each peak are often distributed across the whole Chandra field of view. This evidence confirms that X-ray selected AGN can efficiently track large-scale structures over physical scales of several Mpc. Finally, we computed the Chandra J1030 $z>$3 number counts: while the spectroscopic completeness at high-redshift of our sample is limited, our results point towards a potential source excess at $z\geq$4, which we plan to either confirm or reject in the near future with dedicated spectroscopic campaigns

Rubin-Euclid Derived Data Products:Initial Recommendations

This report is the result of a joint discussion between the Rubin and Euclid scientific communities. The work presented in this report was focused on designing and recommending an initial set of Derived Data products (DDPs) that could realize the science goals enabled by joint processing. All interested Rubin and Euclid data rights holders were invited to contribute via an online discussion forum and a series of virtual meetings. Strong interest in enhancing science with joint DDPs emerged from across a wide range of astrophysical domains: Solar System, the Galaxy, the Local Volume, from the nearby to the primaeval Universe, and cosmology

Optimization of short chain volatile fatty acids production from household food waste for biorefinery applications

Household Food Wastes (HFW) are the most abundant organic wastes at urban level with a worldwide annual production of about 2 billion tons. This material can be the right feedstock for a carboxylate biorefinery platform. This work investigated the influence of different operational parameters (pH, temperature, Organic Loading Rate) on the Volatile Fatty Acids production and on their composition. It was demonstrated that, keeping constant the fermentation duration at 6 days, neutral pH, thermophilic temperature (55 °C) and an organic loading rate of 11 gTVS per Liter per day maximized the VFA production with a yield of 0.38 gVFA per gTVS fed. Under these conditions, the main VFAs were butyric and caproic acids with percentages around 60 and 20%, respectively.3. The analysis of the mixed microbial community performed over the reactor operation showed the dominance of members of Firmicutes phylum mainly affiliated to Clostridium and Lactobacillus genera. The process was mostly driven by Clostridium species in mesophilic runs characterized by stable VFAs production and highest yields whereas Lactobacillus was enriched under thermophilic operating conditions

Funzioni esecutive e profili psico-comportamentali in giovani pazienti emicranici:risultati preliminari

Premessa Le funzioni esecutive sono un modulo della mente che regola i processi di pianificazione, controllo e coordinazione del sistema cognitivo e che governa l\u2019attivazione e la modulazione di schemi e processi. Fra queste si trovano: \u2022 l\u2019organizzazione delle azioni in sequenze gerarchiche di mete; \u2022 lo spostamento flessibile dell'attenzione sulle informazioni rilevate; \u2022 l\u2019attivazione di strategie appropriate e l\u2019inibizione di risposte non adeguate. Metodica Il compito Simon \ue8 un compito di compatibilit\ue0 stimolo risposta (S-R) molto studiato in psicologia sperimentale e sembra particolarmente adatto a rilevare gli effetti causati da diverse malattie sulle funzioni esecutive di controllo, in particolare: sull\u2019attenzione selettiva e spaziale, sulla capacit\ue0 di rilevare e risolvere fenomeni d\u2019interferenza (S-R), sulla selezione della risposta e sul controllo inibitorio. \uc8 stato dimostrato che l\u2019analisi dell\u2019andamento temporale degli effetti d\u2019interferenza forniscono informazioni sull\u2019efficacia dei meccanismi d\u2019inibizione della risposta. Questa informazione recentemente si \ue8 rivelata utile nell\u2019analisi delle funzioni esecutive di controllo in alcune patologie degenerative come il Mild Cognitive Impairment (MCI) e evolutive come l\u2019ADHD. Inoltre, questa misura si \ue8 rilevata sensibile agli effetti del trattamento farmacologico. Di grande interesse risulta l\u2019analisi delle attivit\ue0 elettriche cerebrali durante l\u2019esecuzione del compito Simon. Gli ERPs sono delle deflessioni positive o negative (componenti) del potenziale elettrico registrato sullo scalpo, la cui attivit\ue0 \ue8 sincronizzata con l\u2019elaborazione degli stimoli e con i processi associati al compito che il soggetto sta svolgendo. Tale approccio offre una finestra dentro il sistema neuro-cognitivo del bambino affetto da ADHD fornendo informazioni temporali e spaziali sui processi coinvolti nell\u2019esecuzione del compito. Analizzando le ampiezze e le latenze degli ERPs, quindi, \ue8 possibile descrivere accuratamente la performance di tali pazienti in diversi aspetti dell\u2019elaborazione dell\u2019informazione e di analizzare i tempi di reazione (RT) in funzione dei potenziali stessi