Results 241 to 250 of about 176,382 (265)

Abundances in dwarf irregular galaxies

Publications of the Astronomical Society of the Pacific, 1986
The results of abundance studies of dwarf irregular galaxies and similar objects are reviewed with special attention to variations in the CNO element group. Observations of the forbidden N II and semiforbidden C III lines in the most metal-poor galaxy known, IZw 18, are presented for the first time and CNO abundances are derived via a photoionization ...
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Dwarf Irregular Galaxies

2004
Dwarf irregular galaxies at optical wavelengths are small, faint and appear to be unstructured and irregular in shape. They are typically gas-rich, metal-poor systems, with varying levels of STAR FORMATION occurring in a haphazard manner across the ...
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Giant Outflows from Irregular Dwarf Galaxies

AIP Conference Proceedings, 2005
High‐resolution long‐slit echelle spectroscopy of the two irregular dwarf galaxies NGC 2366 and NGC 4861 was performed with the 4 m telescope of the Kitt Peak National Observatory to examine the structure and the kinematics of the ionized gas. Additionally, we use Hα images from the 3.5 m telescope of the Calar Alto Observatory (NGC 2366) and from the ...
Kerstin Weis, Janine van Eymeren, Dominik J. Bomans   +2 more
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Blue Compact Dwarfs: Extreme Dwarf Irregular Galaxies

1987
In Hubble’s classification scheme, dwarf irregular galaxies (dIs) are low luminosity systems (MB≳ -16) which are at the end of the galaxy morphological sequence and which lack both a dominating nucleus and rotational symmetry [1]. We concentrate here on a class of dIs which are so extreme in these properties that they appear almost stellar in ...
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Irregular Microdome Structure‐Based Sensitive Pressure Sensor Using Internal Popping of Microspheres

Advanced Functional Materials, 2022
Young Jung, Wookjin Lee, Jong Soo Ko
exaly  

A cover‐based contact detection approach for irregular convex polygons in discontinuous deformation analysis

International Journal for Numerical and Analytical Methods in Geomechanics, 2021
Fei Zheng, Hong Zheng, Peter Wriggers
exaly  

A Survey of Evolutionary Algorithms for Multi-Objective Optimization Problems With Irregular Pareto Fronts

IEEE/CAA Journal of Automatica Sinica, 2021
Kuangrong Hao, Yaochu Jin, Kuangrong Hao
exaly  

Morphology analysis of tracks in the aerogels impacted by hypervelocity irregular particles

High Power Laser Science and Engineering, 2021
Ai Du, Bin Zhou, Ling Wang
exaly  

A review of irregular time series data handling with gated recurrent neural networks

Neurocomputing, 2021
Guanjin Wang
exaly  

Irregular dot array nanocomposite molecularly imprinted membranes with enhanced antibacterial property: Synergistic promotion of selectivity, rebinding capacity and flux

Chemical Engineering Journal, 2021
Maohong Fan, Chunxiang Li, Yilin Wu
exaly