Results 171 to 180 of about 2,093,256 (347)
Reversal Asymmetry of Reciprocal Metasurface Enables Ultra‐Compact Varifocal Reflective Lens
Laser &Photonics Reviews, Volume 20, Issue 1, 8 January 2026.The possibility of breaking the reversal symmetry of a lens without violating reciprocity is demonstrated. The freedom provided is utilized to realize an ultra‐compact reflective varifocal lens‐doublet based on a flat metasurface lens and a piezoelectric actuated micromirror.
Christopher A. Dirdal +6 more
wiley +1 more source
The Astrophysical JournalLow-frequency quasiperiodic oscillations (LFQPOs) are commonly observed in X-ray light curves of black hole X-ray binaries (BHXRBs); however, their origin remains a topic of debate.
Qing-Cang Shui +16 more
doaj +1 more source
Nachtsicht ins All mit dem bloßen Auge: Sag mir, wie weit die Sterne steh'n
Physik in unserer Zeit, Volume 57, Issue 1, Page 32-40, January 2026.Beim Blick in den Nachthimmel sehen wir ohne optische Hilfsmittel und abhängig von der lokalen Lichtverschmutzung viele Hundert bis maximal einige Tausend Sterne und auch einige Galaxien. Aber wie weit sind diese von uns entfernt? Und bis zu welchen maximalen Entfernungen können wir Objekte im Weltall mit dem bloßen Auge wahrnehmen?
Michael Vollmer
wiley +1 more source
Discovery of a New Flaring Class in GRS 1915+105 Using AstroSat
The Astrophysical JournalThe highly variable black hole X-ray binary GRS 1915+105 has shown many flaring classes when the source oscillates between the high soft state (HS) and the hard intermediate state with a transition time of less than 10 s. The X-ray flux is anticorrelated
Ruchika Dhaka +3 more
doaj +1 more source
Cherenkov Telescope Array Observatory: Die Zukunft der Gammaastronomie
Physik in unserer Zeit, Volume 57, Issue 1, Page 10-18, January 2026.Im Jahr 1989 hat das Wipple‐Observatorium die erste Quelle hochenergetischer Gammastrahlung entdeckt. 2002 waren dann sechs Quellen bekannt, 2024 schon mehr als 300. Und das ist immer noch lediglich die Spitze des Eisbergs in der jungen Geschichte der Gammaastronomie.
Daniela Hadasch, Daniel Mazin
wiley +1 more source
Discovery of a Pair of Galaxies with Both Hosting X-Ray Binary Candidates at z = 2.544
The Astrophysical Journal LettersAmong high-redshift galaxies, aside from active galactic nuclei (AGNs), X-ray binaries (XRBs) can be significant sources of X-ray emission. XRBs play a crucial role in galaxy evolution, reflecting the stellar populations of galaxies and regulating star ...
Sijia Cai +8 more
doaj +1 more source
High Energy X-ray Telescope Data Analysis Method
, 2016 Haisheng Zhao +6 more
openalex +1 more source
Single‐Molecule FRET‐Tracking of InlB‐Activated MET Receptors in Living Cells
Small, Volume 22, Issue 5, 22 January 2026.Single‐molecule FRET and single‐particle tracking reveal how ligand binding drives dimerization and activation of the MET receptor tyrosine kinase in living cells. Single‐molecule FRET reports on the lifetime of the (MET:InlB)2 complex. Distinct diffusion coefficients and modes of monomeric and dimeric receptor complexes uncover nanometer‐scale ...
Yunqing Li +4 more
wiley +1 more source
XMM-Newton Perspective of the Unique Magnetic Binary-ϵ Lupi
The Astrophysical JournalThe ϵ Lupi A (HD 136504) system stands out among magnetic massive binaries as the only short-period binary system in which both components have detectable magnetic fields.
Ayan Biswas +5 more
doaj +1 more source
Variable magnification glancing incidence x ray telescope [PDF]
A multispectral glancing incidence x ray telescope is disclosed, which capable of broadband, high resolution imaging of solar and stellar x ray and extreme ultraviolet radiation sources includes a primary optical system which focuses the incoming ...
Hoover, Richard
core +1 more source