Results 1 to 10 of about 608,613 (295)
THE MAGNETIC FIELD OF THE IRREGULAR GALAXY NGC 4214 [PDF]
The Astrophysical Journal, 2011 Accepted by ApJ.
Amanda A. Kepley +9 more
semanticscholar +6 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 +4 more sources
LBT/MODS spectroscopy of globular clusters in the irregular galaxy NGC 4449 [PDF]
, 2018 We present intermediate-resolution (R$\sim$1000) spectra in the $\sim$3500-10,000 A range of 14 globular clusters in the magellanic irregular galaxy NGC 4449 acquired with the Multi Object Double Spectrograph on the Large Binocular Telescope.
F. Annibali +12 more
openalex +3 more sources
Supernova Remnants in the Irregular Galaxy NGC 4449
The Astrophysical Journal, 2023 The nearby irregular galaxy NGC 4449 has a star formation rate of ∼0.4 M _☉ yr ^−1 and should host of order 70 supernova remnants (SNRs) younger than 20,000 yr, a typical age for SNRs expanding into an interstellar medium (ISM) with a density of 1 cm ^−3
P. Frank Winkler +2 more
doaj +3 more sources
The extended structure of the dwarf irregular galaxy Sagittarius [PDF]
, 2014 We present a detailed study of the stellar and HI structure of the dwarf irregular galaxy Sagittarius. We use new deep and wide field photometry to trace the surface brightness profile of the galaxy out to ~5.0' (corresponding to ~1600 pc) and down to ...
Battaglia, G. +8 more
core +5 more sources
Morphology of star formation regions in irregular galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 The location of HII regions, which indicates the locus of present star formation in galaxies, is analyzed for a large collection of 110 irregular galaxies (Irr) imaged in H$ $ and nearby continuum. The analysis is primarily by visual inspection, although a two-dimensional quantitative measure is also employed.
N. Brosch, Ana Heller, E. Almoznino
openalex +5 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
Luminous AGB variables in the dwarf irregular galaxy, NGC 3109 [PDF]
Monthly notices of the Royal Astronomical Society, 2018 In a shallow near-infrared survey of the dwarf Irregular galaxy, NGC 3109, near the periphery of the Local Group, we have found eight Mira variables, seven of which appear to be oxygen-rich (O-Miras).
J. W. Menzies +3 more
openalex +3 more sources
Distance and reddening of the Local Group dwarf irregular galaxy NGC 6822 [PDF]
, 2012 On the basis of a new photometric analysis of the Local Group dwarf irregular galaxy NCG 6822 based on observations obtained with the Advanced Camera for Surveys onboard the Hubble Space Telescope, we have obtained a new estimate of the extinction of two
F. Fusco +5 more
openalex +3 more sources
The faint outer regions of the Pegasus dwarf irregular galaxy: a much larger and undisturbed galaxy [PDF]
, 2009 We investigate the spatial extent and structure of the Pegasus dwarf irregular galaxy (PegDIG) using deep, wide-field, multicolour CCD photometry from the Sloan Digital Sky Survey (SDSS) and new deep H I observations.
A. Y. Kniazev +5 more
openalex +3 more sources