Results 221 to 230 of about 12,211 (252)
Galactic and Extragalactic Studies: IV. Photometry of Two Large Southern Clusters of Galaxies. [PDF]
Proc Natl Acad Sci U S A, 1940 Shapley H, Boyd CD.
europepmc +1 more source
Galactic and Extragalactic Studies: XVII. Revision of the Distances of Thirty High-Latitude Globular Clusters. [PDF]
Proc Natl Acad Sci U S A, 1944 Shapley H.
europepmc +1 more source
Galactic and Extragalactic Studies: II. Notes on the Peculiar Stellar Systems in Sculptor and Fornax. [PDF]
Proc Natl Acad Sci U S A, 1939 Shapley H.
europepmc +1 more source
Structure-dynamics relations for late-type spiral and dwarf irregular galaxies revisited
, 2018 Bernhard R. Parodi
openalex +2 more sources
Summary of Investigations of Variable Stars. [PDF]
Proc Natl Acad Sci U S A, 1936 Shapley H.
europepmc +1 more source
Some of the next articles are maybe not open access.
Related searches:
Related searches:
Abundances in dwarf irregular galaxies
Publications of the Astronomical Society of the Pacific, 1986The 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 ...
openaire +2 more sources
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 ...
openaire +3 more sources
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 ...
openaire +3 more sources
A constant intrinsic thickness for dwarf irregular galaxies?
Monthly Notices of the Royal Astronomical Society: Letters, 2016Abstract We assess the intrinsic thickness parameter, qo, for a sample of dwarf irregular galaxies and compare to larger, more massive spiral galaxy systems. We use optical photometry to determine b/a (minor-to-major axial ratio), and we use the H i kinematic inclination angle to derive qo.
M. Johnson +3 more
openaire +2 more sources
Giant Outflows from Irregular Dwarf Galaxies
AIP Conference Proceedings, 2005High‐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 +2 more
openaire +2 more sources
Dwarf Irregular Galaxies of the Local Group
2014Local Group dwarf irregulars (dIrrs) cover an enormous range in star formation properties. Here I discuss these tiny galaxies as probes of star formation at the extremes of low gas densities and low metallicities. We have learned that (1) Star formation is inefficient in dIrrs and yet at very low \(\Sigma_{\rm HI}\) (\(
openaire +2 more sources