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 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.

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

scholarly journals HI Distribution in Extreme Dwarf Irregulars and Dwarf Spheroidals

1998 ◽  
Vol 11 (1) ◽  
pp. 121-122
Author(s):  
Claude Carignan
Keyword(s):  
Star Formation ◽  
Stellar Population ◽  
Large Fraction ◽  
Dwarf Spheroidal Galaxies ◽  
Irregular Galaxies ◽  
Single Burst ◽  
Dwarf Spheroidals ◽  
Dwarf Irregular Galaxies ◽  
Spheroidal Galaxies

Recent studies (Puche & Westpfahl 1994, Young & Lo 1996) have shown that the distribution of HI in some extreme low luminosity dwarf irregular galaxies (e.g. M81dwA, Holmberg I, Leo A) tends to have a ring-like (or shell-like) distribution which suggests that a single burst of star formation could expell most of the remaining ISM (or at least a large fraction of it) from the system. In view of this, Puche & Westpfahl (1994) suggested that in dwarf spheroidal galaxies, the HI should be found at large radii since no young stellar population is observed in most of them.

Stellar feedback in dwarf irregular galaxies with radio continuum observations

2018 ◽  
Vol 14 (S344) ◽  
pp. 255-258
Author(s):  
Volker Heesen ◽  
Aritra Basu ◽  
Elias Brinks ◽  
George Heald ◽  
Andrew Fletcher ◽  
...  
Keyword(s):  
Star Formation ◽  
Low Frequency ◽  
Cosmic Ray ◽  
Radio Continuum ◽  
Very Large Array ◽  
Radio Halo ◽  
Spatially Resolved ◽  
Ic 10 ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies

AbstractLow-mass dwarf irregular galaxies are subject to outflows, in which cosmic rays may play a very important role; they can be traced via their electron component, the cosmic ray electrons (CRe), in the radio continuum as non-thermal synchrotron emission. With the advent of sensitive low-frequency observations, such as with the Low-Frequency Array (LOFAR), we can trace CRe far away from star formation sites. Together with GHz-observations, such as with the Very Large Array (VLA), we can study spatially resolved radio continuum spectra at matched angular resolution and sensitivity. Here, we present results from our 6-GHz VLA survey of 40 nearby dwarf galaxies and our LOFAR study of the nearby starburst dwarf irregular galaxy IC 10. We explore the relation of RC emission with star formation tracers and study in IC 10 the nature of a low-frequency radio halo, which we find to be the result of a galactic wind.

scholarly journals The Stellar Content of 10 Dwarf Irregular Galaxies

1998 ◽  
Vol 116 (6) ◽  
pp. 2886-2915 ◽  
Author(s):  
Regina E. Schulte-Ladbeck ◽  
Ulrich Hopp
Keyword(s):  
Stellar Content ◽  
Irregular Galaxies ◽  
Dwarf Irregular Galaxies
Sign in / Sign up

Export Citation Format

Share Document