Results 21 to 30 of about 573 (139)
Direct SMBH Formation Driven by Runaway Stellar Collisions in Globally Unstable Stellar Systems
Astronomische Nachrichten, EarlyView.ABSTRACT The fueling problem addresses the ultimate fate of the reservoirs of gas and stars driven into the deepest gravitational potential wells of galaxies, thus it may contain the Universe's densest concentrations of gas and stars. This raises a key question: does the infalling material collapse directly into a supermassive black hole, or can it ...
Marcelo C. Vergara, Andrés Escala
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The Stellar Content of the Nuclei of Spiral Galaxies [PDF]
Highlights of Astronomy, 1980 Widened, image-tube spectra at a dispersion of 120 Å mm-1 were obtained of the nuclei of 36 spiral (Shapley-Ames) galaxies. Spectral features in the region λλ 3800 - 4300 Å were used to assign a spectral index to each galaxy and to estimate the luminosity classes of the stars contributing the majority of the light at these wavelengths. Bulge magnitudes
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EBHIS Local Volume Galaxy Hi Survey (LVGHIS)
Astronomische Nachrichten, EarlyView.ABSTRACT Here, we present the “Local Volume Galaxy Hi Survey” (LVGHIS). It is based on the first data release of the Milky Way portion of the Effelsberg Bonn Hi‐Survey (EBHIS). We homogeneously measured the mass and dynamics of the local volume galaxies within the radial velocity limit of |vLSR|≤600kms−1$$ \mid {v}_{\mathrm{LSR}}\mid \le 600\kern0.6em \
V. A. Schulz +3 more
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Feeding and feedback in nuclei of galaxies [PDF]
Proceedings of the International Astronomical Union, 2019 AbstractOur aim is to explore the close environment of Active Galactic Nuclei (AGN) and its connection to the host galaxy through the morphology and dynamics of the cold gas inside the central kpc in nearby AGN. We report Atacama Large Millimeter/submillimeter Array (ALMA) observations of AGN feeding and feedback caught in action in NGC613 and NGC1808 ...
Anelise Audibert +3 more
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Geophysical Research Letters, Volume 53, Issue 19, 16 October 2026.Abstract Recent works suggest there are periods when the Sun encountered massive interstellar cold clouds which compressed the heliosphere to within Earth's orbit, exposing Earth to interstellar galactic cosmic rays and energetic particles of heliospheric origin.
Anna Nica +4 more
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Surrogate‐Optimized Flow‐Guided Miniature Condenser for Rapid Exhaled Glucose Detection
Advanced Materials Technologies, Volume 11, Issue 20, 21 October 2026.A surrogate‐optimized miniature condenser guides humid exhaled flow toward cold surfaces to accelerate exhaled breath condensate collection. By improving vapor access within a compact footprint, the design increases sample yield. This enables post‐collection enrichment and rapid colorimetric glucose detection from dilute exhaled biomarkers within a 5 ...
Yiming Thomas Lu +6 more
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Advanced Science, Volume 13, Issue 55, 5 October 2026.Complex microarchitectures emerge from simple flow‐driven transformations as static mixers iteratively reorient and split material domains. Coupled with diverse deposition strategies, chaotic printing provides an accessible platform for fabricating architected materials that support biologically and chemically relevant processes. ABSTRACT Nature builds
Edna Johana Bolívar‐Monsalve +7 more
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Influence of Dynamical Friction on the Unstable Manifolds of Lagrange Points in Barred Galaxies
Astronomische Nachrichten, Volume 347, Issue 8, October 2026.ABSTRACT Some time ago the idea has been proposed that rings and spirals in barred galaxies are shaped by the unstable manifolds of the Lagrange points sitting near the ends of the bar. The topic of the present article is an investigation of whether the numerical support for this suggestion can be improved by the inclusion of dynamical friction into ...
Christof Jung
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Environmental and Molecular Mutagenesis, Volume 67, Issue 8-9, October-November 2026.ABSTRACT Charged particles like iron‐56 ions impose health risks in long‐term manned space exploration. This study was designed to define the impact of Trp53 status upon the manifestation of mutations in the hypoxanthine‐guanine phosphoribosyltransferase (Hprt) gene in splenic T‐cells following exposure of Trp53 wild‐type, hemizygous, and nullizygous ...
Vernon E. Walker +3 more
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Activity in the Nuclei of Normal Galaxies [PDF]
Highlights of Astronomy, 1980 The principal motivation behind the work summarized below was to define the nature of a “typical” galactic nucleus and thereby determine whether such nuclei differ from active nuclei in a qualitative or only quantitative sense. I hoped that such a study would then yield clues as to the origin and duration of nuclear activity and the effects such ...
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