Results 1 to 10 of about 599,735 (207)
The extended structure of the dwarf irregular galaxy Sagittarius [PDF]
Astronomy & Astrophysics, 2014 We present a detailed study of the stellar and HI structure of the dwarf irregular galaxy Sagittarius. We use new deep and wide field photometry to trace the surface brightness profile of the galaxy out to ~5.0' (corresponding to ~1600 pc) and down to ...
Battaglia, G. +8 more
core +12 more sources
The oxygen abundance deficiency in irregular galaxies [PDF]
New Astronomy Reviews, 2000 The observed oxygen abundances in a number of irregular galaxies have been compared with predictions of the closed-box model of chemical and photometric evolution of galaxies. Oxygen is found to be deficient with respect to the predicted abundances. This
Ferrini, F., Pilyugin, L. S.
core +6 more sources
Dark Matter and the Chemical Evolution of Irregular Galaxies [PDF]
The Astrophysical Journal, 1998 We present three types of chemical evolution models for irregular galaxies: closed-box with continuous star formation rates (SFRs), closed-box with bursting SFRs, and O-rich outflow with continuous SFRs. We discuss the chemical evolution of the irregular
Arimoto N. +25 more
core +7 more sources
The star formation history of the Sculptor Dwarf Irregular Galaxy [PDF]
, 2012 [abridged] We study the resolved stellar populations and derive the SFH of the SDIG, a gas-rich dwarf galaxy member of the NGC7793 subgroup in the Sculptor group. We construct a CMD using archival HST observations and examine its stellar content.
Cole, Andrew A., Lianou, Sophia
core +4 more sources
ON THE RADIAL EXTENT OF THE DWARF IRREGULAR GALAXY IC10 [PDF]
The Astrophysical Journal, 2010 We present new deep and accurate space (Advanced Camera for Surveys–Wide Field Planetary Camera 2 on board the Hubble Space Telescope) and ground-based (Suprime-Cam at Subaru Telescope, Mega-Cam at Canada–France–Hawaii Telescope) photometric and ...
N. Sanna +18 more
semanticscholar +6 more sources
THE MAGNETIC FIELD OF THE IRREGULAR GALAXY NGC 4214 [PDF]
The Astrophysical Journal, 2011 We examine the magnetic field in NGC 4214, a nearby irregular galaxy, using multi-wavelength radio continuum polarization data from the Very Large Array.
A. Kepley +4 more
semanticscholar +5 more sources
The Full-fledged Dwarf Irregular Galaxy Leo A [PDF]
The Astrophysical Journal, 2004 We have studied Leo A, an isolated and extremely gas-rich dwarf irregular galaxy of very low stellar mass and metallicity. Ages of the stellar populations in Leo A range from ~10 Myr to ~10 Gyr.
V. Vansevičius +10 more
semanticscholar +5 more sources
Search for dark matter annihilation in the Wolf-Lundmark-Melotte dwarf irregular galaxy with H.E.S.S. [PDF]
Physical Review D, 2021 We search for an indirect signal of dark matter through very high-energy gamma rays from the Wolf-Lundmark-Melotte (WLM) dwarf irregular galaxy. The pair annihilation of dark matter particles would produce Standard Model particles in the final state such
H. Collaboration +234 more
semanticscholar +1 more source
Magnetic Fields in Irregular Galaxies [PDF]
Proceedings of the International Astronomical Union, 2008 Magnetic fields are an important component of the interstellar medium, especially in low-mass galaxies like irregulars where the magnetic pressure may be significant. However, few irregular galaxies have observed magnetic field structures. Using the VLA, the GBT, and the ATCA, we have observed several irregular galaxies in the radio continuum to ...
Timothy Robishaw +6 more
openaire +6 more sources
UVIT Imaging of WLM: Demographics of Star-forming Regions in the Nearby Dwarf Irregular Galaxy [PDF]
Astronomical Journal, 2018 We present a study of star-forming regions and their demographics in the nearby dwarf irregular galaxy WLM using Ultraviolet Imaging Telescope (UVIT) multiband observations in three filters, F148W, N245M, and N263M.
C. Mondal, A. Subramaniam, K. George
semanticscholar +1 more source