Size - Stellar Mass Relation and Morphology of Quiescent Galaxies at z≥3z\geq3 in Public JWSTJWST Fields

We present the results of a systematic study of the rest-frame optical morphology of quiescent galaxies at $z \geq 3$ using the Near-Infrared Camera (NIRCam) onboard $JWST$. Based on a sample selected by $UVJ$ color or $NUVUVJ$ color, we focus on 26 quiescent galaxies with $9.8<\log{(M_\star/M_\odot)}<11.4$ at $2.8<z_{\rm phot}<4.6$ with publicly available $JWST$ data. Their sizes are constrained by fitting the S\'ersic profile to all available NIRCam images. We see a negative correlation between the observed wavelength and the size in our sample and derive their size at the rest-frame $0.5\, {\rm \mu m}$ taking into account this trend. Our quiescent galaxies show a significant correlation between the rest-frame $0.5\, {\rm \mu m}$ size and the stellar mass at $z\geq3$. The analytical fit for them at $\log{(M_\star/M_\odot)}>10.3$ implies that our size - stellar mass relations are below those at lower redshifts, with the amplitude of $\sim0.6\, {\rm kpc}$ at $M_\star = 5\times 10^{10}\, M_\odot$. This value agrees with the extrapolation from the size evolution of quiescent galaxies at $z<3$ in the literature, implying that the size of quiescent galaxies increases monotonically from $z\sim3-5$. Our sample is mainly composed of galaxies with bulge-like structures according to their median S\'ersic index and axis ratio of $n\sim3-4$ and $q\sim0.6-0.8$, respectively. On the other hand, there is a trend of increasing fraction of galaxies with low S\'ersic index, suggesting $3<z<5$ might be the epoch of onset of morphological transformation with a fraction of very notable disky quenched galaxies.Comment: 23 pages, 16 figures, 2 tables; submitted to Ap

The contested terrain of hospital management: professional projects and healthcare reforms in Denmark

Although much has been written on the changing management of professional services organizations, only limited attention has been given to the way in which management itself might represent a contested terrain. Drawing on concepts from the sociology of professions, this article develops this idea in relation to the Danish hospital sector. The analysis of secondary sources reveals how, from the mid-1980s, both the nursing and medical professions in Denmark actively sought to lay claim to the jurisdiction of hospital management. The result of this struggle was to further reinforce the dominant position of doctors in the clinical division of labour although the position of nurses has also been enhanced. Such findings point to the need to give more attention to the way broader changes in hospital governance are mediated by interprofessional struggles and rivalries. Such struggles, in turn, have implications not only for the division of labour and status order between professions but also for the way management work itself is enacted

Size-Stellar Mass Relation and Morphology of Quiescent Galaxies at z ≥ 3 in Public JWST Fields

We present the results of a systematic study of the rest-frame optical morphology of quiescent galaxies at z ≥ 3 using the Near-Infrared Camera (NIRCam) on board the James Webb Space Telescope (JWST). Based on a sample selected by UVJ color or NUVUVJ color, we focus on 26 quiescent galaxies with 9.8 &lt; log ( M ⋆ / M ⊙ ) &lt; 11.4 at 2.8 &lt; z phot &lt; 4.6 with publicly available JWST data. Their sizes are constrained by fitting the Sérsic profile to all available NIRCam images. We see a negative correlation between the observed wavelength and the size and derive their size at the rest frame 0.5 μm using size measurements in multiple bands. Our quiescent galaxies show a significant correlation between the rest-frame 0.5 μm size and the stellar mass at z ≥ 3. The analytical fit for them at log ( M ⋆ / M ⊙ ) &gt; 10.3 implies that our size-stellar mass relations are below those at lower redshifts, with the amplitude of ∼0.6 kpc at M ⋆ = 5 × 1010 M ⊙. This value agrees with the extrapolation of the size evolution of quiescent galaxies at z &lt; 3 in the literature, implying that the size of quiescent galaxies increases monotonically from z ∼ 3-5. Our sample mainly comprises galaxies with bulge-like structures according to their median Sérsic index and axis ratio of n ∼ 3-4 and q ∼ 0.6-0.8, respectively. On the other hand, there is a trend of increasing fraction of galaxies with low Sérsic index at higher redshift, suggesting 3 &lt; z &lt; 5 might be the epoch of onset of morphological transformation with a fraction of very notable disky quenched galaxies.</p

An Atlas of Color-selected Quiescent Galaxies at z > 3 in Public JWST Fields

We present the results of a systematic search for candidate quiescent galaxies in the distant universe in 11 JWST fields with publicly available observations collected during the first 3 months of operations and covering an effective sky area of ∼145 arcmin ^2 . We homogeneously reduce the new JWST data and combine them with existing observations from the Hubble Space Telescope. We select a robust sample of ∼80 candidate quiescent and quenching galaxies at 3 3, as could be expected for highly clustered massive systems. Importantly, JWST enables the robust identification of quenching/quiescent galaxy candidates at lower masses and higher redshifts than before, challenging standard formation scenarios. All data products, including the literature compilation, are made publicly available

Current preventive strategies and management of Epstein-Barr virus-related post-transplant lymphoproliferative disease in solid organ transplantation in Europe. Results of the ESGICH Questionnaire-based Cross-sectional Survey

There is limited clinical evidence on the utility of the monitoring of Epstein-Barr virus (EBV) DNAemia in the pre-emptive management of post-transplant lymphoproliferative disease (PTLD) in solid organ transplant (SOT) recipients. We investigated current preventive measures against EBV-related PTLD through a web-based questionnaire sent to 669 SOT programmes in 35 European countries. This study was performed on behalf of the ESGICH study group from the European Society of Clinical Microbiology and Infectious Diseases. A total of 71 SOT programmes from 15 European countries participated in the study. EBV serostatus of the recipient is routinely obtained in 69/71 centres (97%) and 64 (90%) have access to EBV DNAemia assays. EBV monitoring is routinely used in 85.9% of the programmes and 77.4% reported performing pre-emptive treatment for patients with significant EBV DNAemia levels. Pre-emptive treatment for EBV DNAemia included reduction of immunosuppression in 50.9%, switch to mammalian target of rapamycin inhibitors in 30.9%, and use of rituximab in 14.5% of programmes. Imaging by whole-body 18-fluoro-deoxyglucose positron emission tomography (FDG-PET) is used in 60.9% of centres to rule out PTLD and complemented computer tomography is used in 50%. In 10.9% of centres, FDG-PET is included in the first-line diagnostic workup in patients with high-risk EBV DNAemia. Despite the lack of definitive evidence, EBV load measurements are frequently used in Europe to guide diagnostic workup and pre-emptive reduction of immunosuppression. We need prospective and controlled studies to define the impact of EBV monitoring in reducing the risk of PTLD in SOT recipients