Molecular gas in the centre of nearby galaxies from VLT/SINFONI integral field spectroscopy - II. Kinematics(star)

We present an analysis of the H2 emission-line gas kinematics in the inner ≲4 arcsec radius of six nearby spiral galaxies, based on adaptive optics-assisted integral-field observations obtained in the K band with SINFONI/VLT. Four of the six galaxies in our sample display ordered H2 velocity fields, consistent with gas moving in the plane of the galaxy and rotating in the same direction as the stars. However, the gas kinematics is typically far from simple circular motion. We can classify the observed velocity fields into four different types of flows, ordered by increasing complexity: (1) circular motion in a disc (NGC 3351); (2) oval motion in the galaxy plane (NGC 3627 and NGC 4536); (3) streaming motion superimposed on circular rotation (NGC 4501); and (4) disordered streaming motions (NGC 4569 and NGC 4579). The H2 velocity dispersion in the galaxies is usually higher than 50 km s−1 in the inner 1–2 arcsec radii. The four galaxies with ordered kinematics have v/σ < 1 at radii less than 40–80 pc. The radius at which v/σ = 1 is independent of the type of nuclear activity. While the low values of v/σ could be taken as an indication of a thick disc in the innermost regions of the galaxies, other lines of evidence (e.g. H2 morphologies and velocity fields) argue for a thin disc interpretation in the case of NGC 3351 and NGC 4536. We discuss the implications of the high values of velocity dispersion for the dynamics of the gaseous disc and suggest caution when interpreting the velocity dispersion of ionized and warm tracers as being entirely dynamical. Understanding the nature and role of the velocity dispersion in the gas dynamics, together with the full 2D information of the gas, is essential for obtaining accurate black hole masses from gas kinematics

B- und C-Verletzungen der kindlichen Wirbelsäule mit Luxation der kleinen Wirbelgelenke - klinische und radiologische Ergebnisse nach 65 bzw. 55 Monaten

Gray Brothers' Big Wheel - BW38 - photographed 1977

CarbonSafe – Zbudowanie zintegrowanego systemu pomiarowego dla komponentów CFRP w przemyśle motoryzacyjnym

Overview of a German project funded by the Federal Department of Education and Research within the scope of the priority program “KMU Innovativ” (Funding No. 16ES0333). The idea of the project was to develop a simple, but efficient SHM system for CFRP structures based on guided waves. The key milestones of the project were: • specification of required sensors and development of sensors • sensor characterization and application • concept of external diagnostic equipment • transducer self-test • validation by generic geometries • proof by POD and simulation of measurement results • implementation of sensors into automotive structure • field test.Przegląd niemieckiego projektu finansowanego przez Federalny Departament Edukacji i Badań w ramach programu priorytetowego "KMU Innovativ" (Fundusze nr 16ES0333). Ideą projektu było opracowanie prostego, ale skutecznego systemu SHM dla struktur CFRP bazującego na zastosowaniu fal prowadzonych. Kluczowymi kamieniami milowymi tego projektu były: • specyfikacja wymagań i opracowanie czujników • określenie charakterystyki i zastosowanie czujnika • koncepcja zewnętrznego sprzętu diagnostycznego • autotest przetwornika • walidacja za pomocą ogólnych geometrii • dowód przez POD i symulacje wyników pomiarów • wdrożenie czujników do rozwiązań samochodowych • test w terenie