Results 101 to 110 of about 517,834 (312)
Alignment and morphology of elliptical galaxies: the influence of the cluster tidal field
, 1994 We investigate two possible effects of the tidal field induced by a spherical cluster on its elliptical galaxy members: the modification of the ellipticity of a spherical galaxy and the isophotal alignment in the cluster radial direction of a misaligned ...
Ciotti, L., Dutta, S. N.
core +1 more source
Dynamical Models of Elliptical Galaxies [PDF]
Symposium - International Astronomical Union, 1975 Self-consistent dynamical models of elliptical galaxies have been constructed using a modification of the Prendergast-Tomer algorithm. They reproduce many of the observed properties of elliptical galaxies.
openaire +1 more source
Geometrical evidence for dark matter: X-ray constraints on the mass of the elliptical galaxy NGC 720 [PDF]
, 1993 We describe (1) a new test for dark matter and alternate theories of gravitation based on the relative geometries of the X-ray and optical surface brightness distributions and an assumed form for the potential, of the optical light, (2) a technique to ...
D. Buote, C. Canizares
semanticscholar +1 more source
Proton‐linked effects on the axial coordination in ferric and ferrous horse heart cytochrome c
Protein Science, Volume 34, Issue 11, November 2025.Abstract The effect of pH (between pH 7.0 and 0.0) on the spectroscopic properties of ferric and ferrous derivatives of horse heart cytochrome c (hhcytc‐Fe(III) and hhcytc‐Fe(II), respectively) in 1.0M phosphate buffer is reported. This study further deepens the investigation of spectroscopic properties of a heme‐protein to very low pH (i.e., pH ≈ 0 ...
Federico Sebastiani +8 more
wiley +1 more source
UV Visibility of Moderate-Redshift Giant Elliptical Galaxies [PDF]
Journal of Astronomy and Space Sciences, 1998 We show quantitatively whether giant elliptical galaxies would be visible at far UV wavelengths if they were placed at moderate redshift of 0.4-0.5. On the basis of simple cosmological tests, we conclude that giant elliptical galaxies can be detectable ...
Myung-Hyun Rhee +3 more
doaj
The Effect of Superpositions on the Planetary Nebula Luminosity Function
The Astrophysical Journal, 2023 Planetary nebula (PN) surveys in systems beyond ∼10 Mpc often find high-excitation, point-like sources with [O iii ] λ 5007 fluxes greater than the apparent bright-end cutoff of the planetary nebula luminosity function (PNLF).
Owen Chase +3 more
doaj +1 more source
, 2018 The intrinsic alignment of galaxies is an important systematic effect in weak-lensing surveys, which can affect the derived cosmological parameters. One direct way to distinguish different alignment models and quantify their effects on the measurement is
Cui, Weiguang +17 more
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Principal Component Analysis of Molecular Dynamic Trajectories: Concepts, Tools, and Applications
WIREs Computational Molecular Science, Volume 15, Issue 6, November/December 2025.Principal component analysis (PCA) applied to dynamical systems. Top‐left: PCA of the tip motion of a mechanical spring. Top‐right: dihedral PCA of the trialanine peptide. Bottom‐left: three‐dimensional mapping of the end‐to‐end distance in the space of the first two eigenvectors of a β‐hairpin peptide.
Danilo Roccatano
wiley +1 more source
Can We Discover Physical Models Using Machine Learning? A Case Study of Galaxy Sizes
The Astrophysical JournalWe explore the ability of machine learning methods to discover underlying equations of physics by searching for the equations governing galaxy size in a semianalytic model. This case study allows us to evaluate the process as we know the ground truth. We
Festa Buçinca-Çupallari +4 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 Minor mergers are thought to drive the structural evolution of massive quiescent galaxies; however, existing Hubble Space Telescope (HST) imaging is primarily sensitive to stellar mass ratios ≳1:10.
Katherine A. Suess +19 more
doaj +1 more source