| 1. |
- Berne, Olivier, et al.
(författare)
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PDRs4All : A JWST Early Release Science Program on Radiative Feedback from Massive Stars
- 2022
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Ingår i: Publications of the Astronomical Society of the Pacific. - : IOP Publishing. - 0004-6280 .- 1538-3873. ; 134:1035
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Tidskriftsartikel (refereegranskat)abstract
- Massive stars disrupt their natal molecular cloud material through radiative and mechanical feedback processes. These processes have profound effects on the evolution of interstellar matter in our Galaxy and throughout the universe, from the era of vigorous star formation at redshifts of 1-3 to the present day. The dominant feedback processes can be probed by observations of the Photo-Dissociation Regions (PDRs) where the far-ultraviolet photons of massive stars create warm regions of gas and dust in the neutral atomic and molecular gas. PDR emission provides a unique tool to study in detail the physical and chemical processes that are relevant for most of the mass in inter- and circumstellar media including diffuse clouds, proto-planetary disks, and molecular cloud surfaces, globules, planetary nebulae, and star-forming regions. PDR emission dominates the infrared (IR) spectra of star-forming galaxies. Most of the Galactic and extragalactic observations obtained with the James Webb Space Telescope (JWST) will therefore arise in PDR emission. In this paper we present an Early Release Science program using the MIRI, NIRSpec, and NIRCam instruments dedicated to the observations of an emblematic and nearby PDR: the Orion Bar. These early JWST observations will provide template data sets designed to identify key PDR characteristics in JWST observations. These data will serve to benchmark PDR models and extend them into the JWST era. We also present the Science-Enabling products that we will provide to the community. These template data sets and Science-Enabling products will guide the preparation of future proposals on star-forming regions in our Galaxy and beyond and will facilitate data analysis and interpretation of forthcoming JWST observations.
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| 2. |
- Carlomagno, Brunella, et al.
(författare)
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End-to-end simulations of the E-ELT/METIS coronagraphs
- 2016
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Ingår i: Adaptive Optics Systems V. - : SPIE - International Society for Optical Engineering. ; , s. 1-10
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Konferensbidrag (refereegranskat)abstract
- The direct detection of low-mass planets in the habitable zone of nearby stars is an important science case for future E-ELT instruments such as the mid-infrared imager and spectrograph METIS, which features vortex phase masks and apodizing phase plates (APP) in its baseline design. In this work, we present end-to-end performance simulations, using Fourier propagation, of several METIS coronagraphic modes, including focal-plane vortex phase masks and pupil-plane apodizing phase plates, for the centrally obscured, segmented E-ELT pupil. The atmosphere and the AO contributions are taken into account. Hybrid coronagraphs combining the advantages of vortex phase masks and APPs are considered to improve the METIS coronagraphic performance.
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| 3. |
- Hau, Stephan, 1960-, et al.
(författare)
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Die Frankfurter Präventionsstudie. Zur psychischen und psychosozialen Integration von verhaltensauffälligen Kindern (insbesondere von ADHS) im Kindergartenalter - ein Arbeitsbericht.
- 2006
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Ingår i: ADHS - Frühprävention statt Medikalisierung. Theorie, Forschung, Kontroversen.. - Göttingen : Vandenhoeck & Ruprecht. - 9783525451786 - 3525451784 ; , s. 238-269
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Bokkapitel (övrigt vetenskapligt/konstnärligt)abstract
- Wie soll ADHS behandelt werden? Dieses Buch setzt sich auf fachlich-wissenschaftlicher Ebene sowohl mit der Diagnose als auch mit der Behandlung von ADHS auseinander. Die einen plädieren für einen verstehenden und therapeutischen Umgang mit dem betroffenen Kind, während andere in einer medikamentösen Behandlung das Mittel der Wahl sehen.Das Aufmerksamkeits-Defizit-Hyperaktivitäts-Syndrom (ADHS) ist heutzutage eine weitverbreitete Diagnose, mancherorts für fast alle kindlichen Schwierigkeiten im Vorschul- und Grundschulalter. Die Erklärungen reichen von Störungen des Hirnstoffwechsels, Frühverwahrlosungen, psychischen oder psychosozialen Regulationsstörungen bis hin zu Hochbegabungen. Bei den Präventions- und Therapieangeboten gehen die Empfehlungen weit auseinander. Für die einen ist ein verstehender Zugang zum einzelnen Kind und seiner Lebenssituation der richtige Weg, während andere in einer medikamentösen Behandlung die Lösung des Problems sehen. Diese Sichtweise hat in den letzten zehn Jahren enormen Auftrieb erhalten. Die Autoren dieses Bandes problematisieren und diskutieren eine drohende Medikalisierung sozialer Probleme. Sie greifen aktuelle Kontroversen auf und plädieren für eine sorgfältige Diagnostik sowie für eine professionelle Zusammenarbeit aller beteiligten Experten bei der Therapie der betroffenen Kinder.
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| 4. |
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| 5. |
- Herold, Janina M., et al.
(författare)
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Genetic Risk Score Analysis Supports a Joint View of Two Classification Systems for Age-Related Macular Degeneration
- 2023
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Ingår i: Investigative Ophthalmology and Visual Science. - 0146-0404 .- 1552-5783. ; 64:12
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Tidskriftsartikel (refereegranskat)abstract
- Purpose: The purpose of this study was to evaluate the utility of combining the Clinical Classification (CC) and the Three Continent age-related macular degeneration (AMD) Consortium Severity Scale (3CACSS) for classification of AMD.Methods: In two independent cross-sectional datasets of our population-based AugUR study (Altersbezogene Untersuchungen zur Gesundheit der Universität Regensburg), we graded AMD via color fundus images applying two established classification systems (CC and 3CACSS). We calculated the genetic risk score (GRS) across 50 previously identified variants for late AMD, its association via logistic regression, and area under the curve (AUC) for each AMD stage.Results: We analyzed 2188 persons aged 70 to 95 years. When comparing the two classification systems, we found a distinct pattern: CC “age-related changes” and CC “early AMD” distinguished individuals with 3CACSS “no AMD”; 3CACSS “mild/moderate/severe early AMD” stages, and distinguished CC “intermediate AMD”. This suggested a 7-step scale combining the 2 systems: (i) “no AMD”, (ii) “age-related changes”, (iii) “very early AMD”, (i.e. CC “early”), (iv) “mild early AMD”, (v) “moderate early AMD”, (vi) “severe early AMD”, and (vii) “late AMD”. GRS association and diagnostic accuracy increased stepwise by increased AMD severity in the 7-step scale and by increased restriction of controls (e.g. for CC “no AMD without age-related changes”: AUC = 55.1%, 95% confidence interval [CI] = 51.6, 58.6, AUC = 62.3%, 95% CI = 59.1, 65.6, AUC = 63.8%, 95% CI = 59.3, 68.3, AUC = 78.1%, 95% CI = 73.6, 82.5, AUC = 82.2%, 95% CI = 78.4, 86.0, and AUC = 79.2%, 95% CI = 75.4, 83.0). A stepwise increase was also observed by increased drusen size and area.Conclusions: The utility of a 7-step scale is supported by our clinical and GRS data. This harmonization and full data integration provides an immediate simplification over using either CC or 3CACSS and helps to sharpen the control group.
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| 6. |
- Hirschauer, Alec S., et al.
(författare)
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Imaging of I Zw 18 by JWST. I. Detecting Dusty Stellar Populations
- 2024
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Ingår i: Astronomical Journal. - 1538-3881 .- 0004-6256. ; 168:1
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Tidskriftsartikel (refereegranskat)abstract
- We present a JWST imaging survey of I Zw 18, the archetypal extremely metal-poor, star-forming (SF), blue compact dwarf galaxy. With an oxygen abundance of only similar to 3% Z circle dot, it is among the lowest-metallicity systems known in the local Universe, and is, therefore, an excellent accessible analog for the galactic building blocks which existed at early epochs of ionization and star formation. These JWST data provide a comprehensive infrared (IR) view of I Zw 18 with eight filters utilizing both Near Infrared Camera (F115W, F200W, F356W, and F444W) and Mid-Infrared Instrument (F770W, F1000W, F1500W, and F1800W) photometry, which we have used to identify key stellar populations that are bright in the near- and mid-IR. These data allow for a better understanding of the origins of dust and dust-production mechanisms in metal-poor environments by characterizing the population of massive, evolved stars in the red supergiant (RSG) and asymptotic giant branch (AGB) phases. In addition, it enables the identification of the brightest dust-enshrouded young stellar objects (YSOs), which provide insight into the formation of massive stars at extremely low metallicities typical of the very early Universe. This paper provides an overview of the observational strategy and data processing, and presents first science results, including identifications of dusty AGB, RSG, and bright YSO candidates. These first results assess the scientific quality of JWST data and provide a guide for obtaining and interpreting future observations of the dusty and evolved stars inhabiting compact dwarf SF galaxies in the local Universe.
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