Results 51 to 60 of about 2,720 (178)

Studying the absorption signatures of H I Lyα in the warm-hot circumgalactic medium with TNG50

Astronomy & Astrophysics
In this study, we investigate the spectral signatures of neutral hydrogen Lyman-α absorption arising from the warm-hot gas component of the circumgalactic medium (CGM) around z = 0 Milky Way (MW)-like galaxies using the high-resolution TNG50 cosmological
Aparicio Marcos P., Richter P., Sparre M., Rünger F., Nelson D.   +4 more
doaj   +1 more source

AN EXTRAGALACTIC 12CO J = 3–2 SURVEY WITH THE HEINRICH HERTZ TELESCOPE [PDF]

Astrophysical Journal, 2010
We present results of a 12CO J = 3–2 survey of 125 nearby galaxies obtained with the 10 m Heinrich Hertz Telescope, with the aim to characterize the properties of warm and dense molecular gas in a large variety of environments. With an angular resolution
R. Mao, A. Schulz, C. Henkel, R. Mauersberger, D. Muders, Dihn-V-Trung Purple Mountain Observatory, Cas, Nanjing, M. F. Radioastronomie, B. A. F. Astronomie, U. Bonn, I. Didaktik, University of Koeln, Joint Alma Observatory, Santiago, I. O. Astronomy, Astrophysics, A. Sinica, Taipei, Center for Quantum Electronics, I. O. Physics, Hanoi   +21 more
semanticscholar   +1 more source

Stars on the ascending helium giant branch

Astronomy & Astrophysics
Hot subdwarf stars with masses above 0.8 M⊙ ascend the helium giant branch after the end of core helium burning, before entering the white dwarf cooling track or exploding as type Ib/c supernovae.
Pritzkuleit M., Dorsch M., Miller Bertolami M. M., Geier S., Bradshaw C. W., Dawson H.   +5 more
doaj   +1 more source

No-Slip Boundary Conditions for Electron Hydrodynamics and the Thermal Casimir Pressure

Universe, 2021
We derive modified reflection coefficients for electromagnetic waves in the THz and far infrared range. The idea is based on hydrodynamic boundary conditions for metallic conduction electrons.
Mandy Hannemann, Gino Wegner, Carsten Henkel   +2 more
doaj   +1 more source

Non‐Destructive, Reference‐Free Quantitative Analysis of TaOx Memristive Devices Using Soft X‐Ray Radiation

Advanced Electronic Materials, EarlyView.
A non‐destructive, quantitative approach has been developed to explore the nanoscale dynamics of TaOx‐based memristive devices. The utilization of nano‐X‐ray fluorescence analysis enables the direct probing of spatially resolved elemental distributions, including those present in buried layers, that are critical for the resistive switching.
André Wählisch, Xin Zheng, Andreas Haidl, Jan Weser, Christian Stadelhoff, Marc Dummin, Leona J. Bauer, Rainer Unterumsberger, Ilia Valov, Burkhard Beckhoff   +9 more
wiley   +1 more source

Search for Axion-like particles from nearby pre-supernova stars

Astronomy & Astrophysics
Context. Axion-like particles (ALPs) are hypothetical pseudoscalar bosons that arise in many extensions of the Standard Model and can be well-motivated dark-matter candidates.
Mittal Saurabh, Siegert Thomas, Calore Francesca, Carenza Pierluca, Eisenberger Laura, Giannotti Maurizio, Lella Alessandro, Mirizzi Alessandro, Tsatsis Dimitris, Yoneda Hiroki   +9 more
doaj   +1 more source

The ORCA‐TWIN qCMOS Experiment I. Science Case and Commissioning at Calar Alto Observatory

Astronomische Nachrichten, EarlyView.
ABSTRACT We describe a pilot study to explore a new generation of fast and low noise CMOS image sensors for time domain astronomy, using two remote telescopes with a baseline of 1635 km. The experiment involves direct imaging with novel qCMOS image sensor technology that combines fast readout with sub‐electron readout noise.
Martin M. Roth, Paško Roje, Stella Vješnica, Stefan Cikota, Alex J. Brown, Mike Kretlow, Marco Azzaro, Santiago Reinhart, Jesús Aceituno, Harry Dawson, Carsten Denker, Torsten Enßlin, Stephan Geier, Thomas Granzer, Thomas Kupfer, Gianluca Li Causi, Samaya Nissanke, José Luis Ortiz, Fernando Pedichini, Katja Poppenhäger, Axel Schwope   +20 more
wiley   +1 more source

The 2D continuum radiative transfer problem - Benchmark results for disk configurations [PDF]

, 2004
We present benchmark problems and solutions for the continuum radiative transfer (RT) in a 2D disk configuration. The reliability of three Monte-Carlo and two grid-based codes is tested by comparing their results for a set of well-defined cases which ...
I. Pascucci, S. Wolf, J. Steinacker, C. Dullemond, T. Henning, G. Niccolini, P. Woitke, B. S. M. F. Astronomie, C. I. O. Technology., Astrophysikalisches Institut und Universitaets-Sternwarte, M. F. Astrophysik, Observatoire Cote d'Azur, Departement Fresnel, Zentrum fur Astronomie und Astrophysik, Tu Berlin   +14 more
semanticscholar   +1 more source

Charge Resonance Interaction in Aromatic Trimer Radical Cations Revealed by IR Spectroscopy: The Case of Pyrrole Homo‐ and Heterotrimers

Chemistry – A European Journal, EarlyView.
We demonstrate the power of high‐resolution infrared spectroscopy and complementary quantum chemical calculations to unravel the evolution of the aromatic charge resonance interaction (CR) in cold trimer radical cations for the prototypical pyrrole clusters.
Dashjargal Arildii, Otto Dopfer
wiley   +1 more source

Numerical Simulations of Dark Matter Admixed Neutron Star Binaries

Particles, 2022
Multi-messenger observations of compact binary mergers provide a new way to constrain the nature of dark matter that may accumulate in and around neutron stars.
Mattia Emma, Federico Schianchi, Francesco Pannarale, Violetta Sagun, Tim Dietrich   +4 more
doaj   +1 more source