Results 131 to 140 of about 194,444 (226)

Triaxiality in elliptical galaxies

, 1980
A simple geometrical model of elliptical galaxies having shells with different axial ratios c/a, b/a has been produced to interpret three fundamental key-features of elliptical galaxies: (1) the distribution of the maximum flattening observed; (2) the ...
GALLETTA, GIUSEPPE, BENACCHIO L.
core  

Elliptical galaxies

, 1989
In this thesis, radial colour and line strength gradients are investigated, and corresponding stellar population gradients are modelled. Together with the gradients, the morphology of the galaxies in optical and near-infrared colours is analyzed. When investigated in detail, every elliptical galaxy has its own special morphology, but nevertheless the ...
openaire   +1 more source

Indirect estimation of elliptical stable distributions [PDF]

We present an indirect estimation approach for elliptical stable distributions which relies on the use of a multivariate t distribution as auxiliary model.
LOMBARDI, Marco, VEREDAS, David
core  

Galaxy Morphological Classification with Zernike Moments and Machine Learning Approaches

The Astrophysical Journal Supplement Series
Classifying galaxies is an essential step for studying their structures and dynamics. Using GalaxyZoo2 (GZ2) fractions thresholds, we collect 545 and 11,735 samples in nongalaxy and galaxy classes, respectively.
Hamed Ghaderi, Nasibe Alipour, Hossein Safari   +2 more
doaj   +1 more source

The Clustering of Dark Matter, Haloes & Galaxies [PDF]

, 2008
In this thesis I study the spatial distribution of galaxies, haloes and dark matter particlesin the Universe. The subjects investigated are conceptually divided into three areas.One line of research, which is made up of Chapters 2 and 3， is to explore ...
Raúl Esteban Angulo de la Puente,
core  

Astronomia ex machina: a history, primer and outlook on neural networks in astronomy. [PDF]

R Soc Open Sci, 2023
Smith MJ, Geach JE.
europepmc   +1 more source

A Milky Way-like barred spiral galaxy at a redshift of 3. [PDF]

Nature, 2023
Costantin L, Pérez-González PG, Guo Y, Buttitta C, Jogee S, Bagley MB, Barro G, Kartaltepe JS, Koekemoer AM, Cabello C, Corsini EM, Méndez-Abreu J, de la Vega A, Iyer KG, Bisigello L, Cheng Y, Morelli L, Arrabal Haro P, Buitrago F, Cooper MC, Dekel A, Dickinson M, Finkelstein SL, Giavalisco M, Holwerda BW, Huertas-Company M, Lucas RA, Papovich C, Pirzkal N, Seillé LM, Vega-Ferrero J, Wuyts S, Yung LYA.   +32 more
europepmc   +1 more source

Orbiting, colliding, and merging liquid lenses on a soap film: Toward gravitational analogs. [PDF]

PNAS Nexus
Martischang JP, Reichert B, Haouche I, Rousseaux G, Duchesne A, Baudoin M.   +5 more
europepmc   +1 more source

A trail of dark-matter-free galaxies from a bullet-dwarf collision. [PDF]

Nature, 2022
van Dokkum P, Shen Z, Keim MA, Trujillo-Gomez S, Danieli S, Dutta Chowdhury D, Abraham R, Conroy C, Kruijssen JMD, Nagai D, Romanowsky A.   +10 more
europepmc   +1 more source

A rising tide: intrinsic alignments since the turn of the millennium. [PDF]

Astron Astrophys Rev
Chisari NE.
europepmc   +1 more source