scholarly journals Dwarf irregular galaxies with extended HI gas disks: Suppression of small-scale spiral structure by dark matter halo

New Astronomy ◽  
2018 ◽  
Vol 63 ◽  
pp. 38-47 ◽  
Author(s):  
Soumavo Ghosh ◽  
Chanda J. Jog
Keyword(s):  
Dark Matter ◽  
Spiral Structure ◽  
Dark Matter Halo ◽  
Small Scale ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies

scholarly journals Dark Matter search in dwarf irregular galaxies with the Fermi Large Area Telescope

2021 ◽  
Author(s):  
Viviana Gammaldi ◽  
Judit Pérez-Romero ◽  
Javier Coronado-Blázquez ◽  
Mattia Di Mauro ◽  
Miguel Angel Sánchez-Conde ◽  
...  
Keyword(s):  
Dark Matter ◽  
Large Area ◽  
Dark Matter Search ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies

7. Galaxies

2016 ◽  
pp. 115-144
Author(s):  
James Binney
Keyword(s):  
Dark Matter ◽  
Gravitational Field ◽  
Chemical Evolution ◽  
Spiral Galaxies ◽  
Stellar Dynamics ◽  
Huge Number ◽  
Lenticular Galaxies ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies ◽  
Intermediate Density

‘Galaxies’ describes galaxy morphology, the chemical evolution of galaxies, and stellar dynamics. A galaxy consists of a huge number of point masses—stars and dark matter—that move freely in the gravitational field that they jointly generate. The nature of a galaxy is largely determined by its luminosity, its bulge-to-disc ratio, and the ratio of its mass of cold gas to the mass in stars. Galaxies are also shaped by their environments. Dense environments are rich in elliptical and lenticular galaxies, while abnormally under-dense environments are rich in dwarf irregular galaxies. Spiral galaxies like our own tend to inhabit regions of intermediate density.

The Various Kinematics of Dwarf Irregular Galaxies in Nearby Groups and Their Dark Matter Distributions

2000 ◽  
Vol 120 (6) ◽  
pp. 3027-3059 ◽  
Author(s):  
Stéphanie Côté ◽  
Claude Carignan ◽  
Kenneth C. Freeman
Keyword(s):  
Dark Matter ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies

scholarly journals Morphological aspects of star formation in dwarf galaxies

1999 ◽  
Vol 171 ◽  
pp. 261-270
Author(s):  
Noah Brosch ◽  
Ana Heller ◽  
Elchanan Almoznino
Keyword(s):  
Star Formation ◽  
Surface Brightness ◽  
High Surface ◽  
Dark Matter Halo ◽  
Star Forming ◽  
Star Forming Regions ◽  
Tidal Interactions ◽  
Irregular Galaxies ◽  
Asymmetric Pattern ◽  
Dwarf Irregular Galaxies

AbstractWe studied the morphology of star formation in dwarf irregular galaxies and found that, in general, this takes place on one side of a galaxy and far from the center. This is mainly true for low surface brightness galaxies; in high surface brightness dwarf irregulars the star formation tends to be more centrally concentrated, as well as being more intense. We discuss possible star formation triggers in dwarf irregular galaxies, and evaluate the reasons for the peculiar distribution of star forming regions of these galaxies. Stochastic star formation, interactions with external gas, and tidal interactions appear to be ruled out as responsible for the asymmetric pattern of star formation. We conclude that asymmetry of a dark matter halo or of an asymmetric underlying stellar distribution may trigger an asymmetric pattern of star formation.

scholarly journals Constraints on cross section and lifetime of dark matter with HAWC Observations of dwarf Irregular galaxies

2019 ◽  
Author(s):  
Sergio Hernández Cadena ◽  
Viviana Gammaldi ◽  
José Serna Franco ◽  
Rubén Alfaro Molina ◽  
Ekaterina Karukes ◽  
...  
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies

scholarly journals Dark matter search in dwarf irregular galaxies with the Fermi Large Area Telescope

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
V. Gammaldi ◽  
J. Pérez-Romero ◽  
J. Coronado-Blázquez ◽  
M. Di Mauro ◽  
E. V. Karukes ◽  
...  
Keyword(s):  
Dark Matter ◽  
Large Area ◽  
Dark Matter Search ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies

3D numerical global simulations of cosmic ray driven dynamo in barred and dwarf irregular galaxies

2014 ◽  
Author(s):  
Natalia Nowak ◽  
Katarzyna Otmianowska-Mazur ◽  
Katarzyna Kulpa-Dybel ◽  
Hubert Siejkowski ◽  
Marian Soida ◽  
...  
Keyword(s):  
Cosmic Ray ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies
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