Results 141 to 150 of about 663,816 (320)
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
Galaxy Merging and the Fundamental Plane of Elliptical Galaxies [PDF]
, 2006 We present preliminary results of numerical simulations of dissipationless merging of stellar systems, aimed at exploring the consequences of merging between gas free, spheroidal systems. In particular, we study the dynamical and structural characteristics of hierarchical merging between equal mass stellar systems, and we compare the properties of the ...
Carlo Nipoti +2 more
openaire +3 more sources
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
ArtProtect: Blockchain and NFC‐based anti‐counterfeit system for physical art
IET Blockchain, Volume 4, Issue 4, Page 423-442, December 2024.An anti‐counterfeiting system for physical art based on Ethereum blockchain and near‐field communication technology is proposed and implemented. The system leverages the use of Ethereum smart contracts and inter‐planetary file system to store artworks’ certificate of authenticity, and display them in a mobile app called ArtProtect.
Cindy Handoko Tantowibowo +1 more
wiley +1 more source
Automatic Detection of Galaxy Type From Datasets of Galaxies Image Based on Image Retrieval Approach
Scientific Reports, 2017 This paper presents a new approach for the automatic detection of galaxy morphology from datasets based on an image-retrieval approach. Currently, there are several classification methods proposed to detect galaxy types within an image.
Mohamed Abd El Aziz +2 more
doaj +1 more source
On The Parent Population of Radio Galaxies and the FRI - FRII Dichotomy [PDF]
, 2001 We test the hypothesis that radio galaxies are a random subset of otherwise normal elliptical galaxies. Starting with the observed optical luminosity functions for elliptical galaxies, we show that the probability of an elliptical forming a radio source is a continuous, increasing function of optical luminosity, proportional to L squared.
arxiv +1 more source
Echocardiography, Volume 41, Issue 12, December 2024.Central Illustration: The role of multimodality imaging for transcatheter tricuspid valve interventions (TTVI): echocardiography is used for the evaluation of the severity and mechanism of tricuspid regurgitation (TR), for the assessment of the pulmonary pressure and right ventricular (RV) function and for anatomical feasibility for transcatheter ...
Francesca Coraducci +11 more
wiley +1 more source
Enormous mass of the elliptical galaxy M87: A model for the extended X-ray source
, 1978 An analysis of the X-ray data from the Virgo cluster indicates that the mass of the giant elliptical galaxy M87 exceeds 10/sup 13/ M/sub sun/ or greater.
W. Mathews
semanticscholar +1 more source
Detection, Photometry, and Slitless Radial Velocities of 535 Planetary Nebulae in the Flattened Elliptical Galaxy NGC 4697 [PDF]
, 2001 We have detected 535 planetary nebulae (PNs) in the flattened elliptical galaxy NGC 4697 using the classic on-band, off-band filter technique with the Focal Reducer and Spectrograph at the Cassegrain focus of the first 8 m telescope unit of the ESO Very ...
Roberto H. Méndez +7 more
semanticscholar +1 more source
The Stellar Kinematics of Elliptical Galaxies [PDF]
Symposium - International Astronomical Union, 1987 The kinematic properties of elliptical galaxies are summarized. New developments are discussed in four areas: (i) the Faber-Jackson relation and the role of second parameters (ii) the luminosity-rotation relation (iii) the figures of elliptical galaxies and (iv) the mass-to-light ratio as a function of radius.
openaire +3 more sources