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Odd radio circles (ORCs) are a newly discovered class of extended faint radio sources of unknown origin. We report the first detection of diffuse X-ray gas at the location of a low-redshift ORC (z = 0.046) known as Cloverleaf ORC. This observation was performed with the XMM-Newton X-ray telescope. The physical extent of the diffuse X-ray emission corresponds to a region of approximately 230 kpc by 160 kpc, lying perpendicular to the radio emission detected by ASKAP. The X-ray spectrum shows characteristics of thermal multiphase gas with temperatures of 1.10 ± 0.08 keV and 0.22 ± 0.01 keV and a central density of (4.9 ± 0.6)×10−4 cm−3, indicating that the Cloverleaf ORC resides in a low-mass galaxy group. Using X-ray observations, with hydrostatic equilibrium and isothermal assumptions, we measure the galaxy group to have a gas mass and a total mass of (7.7 ± 0.8)×1011 M⊙ and 2.6 ± 0.3 × 1013 M⊙ within the overdensity radius R500. The presence of a high-velocity subgroup identified in optical data, the orientation of the brightest cluster galaxy, the disturbed morphologies of galaxies toward the east of the Cloverleaf ORC, and the irregular morphology of the X-ray emission suggest that this system is undergoing a galaxy group merger. The radio power of the ORC could be explained by the shock reacceleration of fossil cosmic rays generated by a previous episode of black hole activity in the central active galactic nucleus. [ABSTRACT FROM AUTHOR]

The paper presents the analysis of optically selected GAMA groups and clusters in the SRG/eROSITA X-ray map of eROSITA Final Equatorial Depth Survey, in the halo mass range 1013−5 × 1014 M⊙ and at z < 0.2. All X-ray detections have a clear GAMA counterpart, but most of the GAMA groups in the halo mass range 1013−1014 M⊙ remain undetected. We compare the X-ray surface brightness profiles of the eROSITA detected groups with the mean stacked profile of the undetected low-mass haloes at fixed halo mass. Overall, we find that the undetected groups exhibit less concentrated X-ray surface brightness, dark matter, and galaxy distributions with respect to the X-ray-detected haloes. The mean gas mass fraction profiles are consistent in the two samples within 1.5σ, indicating that the gas follows the dark matter profile. The low-mass concentration and the magnitude gap indicate that these systems are young. They reside with a higher probability in filaments while X-ray-detected groups favour the nodes of the Cosmic Web. Because of the lower central emission, the undetected systems tend to be X-ray underluminous at fixed halo mass and to lie below the LX − M halo relation. Interestingly, the X-ray-detected systems inhabiting the nodes scatter the less around the relation, while those in filaments tend to lie below it. We do not observe any strong relationship between the system X-ray appearance and the active galactic nucleus (AGN) activity. We cannot exclude the role of the past AGN feedback in affecting the gas distribution over the halo lifetime. However, the data suggests that the observed differences might be related to the halo assembly bias. [ABSTRACT FROM AUTHOR]

Objective: No-visitor policies adopted to prevent coronavirus disease-19 (COVID-19) spread in hospital wards have deeply impacted communication with patients and their relatives. Whereas in pre-COVID-19 era family-clinician meetings were held in person, during the pandemic interactions often took place over the phone, frequently causing feelings of uncertainty and distress to the close ones at home. The goal of this study was to assess and improve the effectiveness of structured telephone-based communication with hospitalized onco-hematological patients' relatives in COVID-19 era., Methods: After no-visitor policy was adopted in the Onco-Hematological Unit of Modena, inpatients' relatives were contacted daily for clinical updates. After discharge, a telephone satisfaction survey was administered to all contact people of patients consecutive admitted between December 2020 and January 2021 (n = 97). Mean score of response and potential statistically significative differences depending on respondents' characteristics were assessed., Results: Most relatives were satisfied with the communication received with a mean total score of 4.69 on a 5-point Likert scale (standard deviation: 0.60). Results showed high satisfaction rate with both the informative (mean ± SD: 4.66 ± 0.64) and emotional (mean ± SD: 4.66 ± 0.58) content, with no significant difference depending on respondents' demographic characteristics (p > 0.05)., Conclusion: A structured telephone-based communication may be a reasonable substitute for face-to-face meetings; especially if regular in time, conducted by the same doctor and integrated with video calls. Our findings might assist health workers in implementing measures to minimize the psychological effects of no-visitor policies during hospitalization. Clinical updates delivery through structured phone calls and video calls could become an opportunity also in post-COVID era., (© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)