Results 1 to 10 of about 37,008 (237)
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
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
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
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Discussion on Irregular Galaxies [PDF]
Symposium - International Astronomical Union, 1978 openalex +2 more sources
The Effect of Irregular Absorption on Galaxy Distribution [PDF]
Proceedings of the National Academy of Sciences, 1950 Constance S. Warwick
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IUE spectra of clumpy irregular galaxies⋆ [PDF]
Monthly Notices of the Royal Astronomical Society, 1982 P. Benvenuti, C. Casini, J. Heidmann
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Catching Tidal Dwarf Galaxies at a Later Evolutionary Stage with ALFALFA
The Astronomical Journal, 2023 We present deep optical imaging and photometry of four objects classified as “Almost-Dark” galaxies in the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey because of their gas-rich nature and extremely faint or missing optical emission in ...
Laurin M. Gray +13 more
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Optical observations of the nearby galaxy NGC 2366 through narrowband Hα and [SII] filters. Supernova remnants status [PDF]
Serbian Astronomical Journal, 2019 We present detection of 64 H II regions, three superbubbles and two optical supernova remnant (SNR) candidates in the nearby irregular galaxy NGC 2366. The SNR candidates were detected by applying [S II]/Hα ratio criterion to observations made with the 2-
Vučetić M.M. +4 more
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Near-IR TRGB Distance Modulus of Dwarf Irregular Galaxy IC 1613 [PDF]
Journal of Astronomy and Space Sciences, 2009 The JHKs magnitudes of the red giant branch tip (TRGB) and the distance moduli of the nearby dwarf irregular galaxy IC 1613 have been determined from the nearinfrared luminosity functions (LFs) of the resolved stars in the galaxy.
M. Y. Jung +6 more
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Near-IR TRGB Distance to Nearby Dwarf Irregular Galaxy NGC 6822 [PDF]
Journal of Astronomy and Space Sciences, 2008 We report the distance modulus of nearby dwarf irregular galaxy NGC 6822 estimated from the so-called Tip of Red-giant Branch (TRGB) method. To detect the apparent magnitudes of the TRGB we use the color-magnitude diagrams (CMDs) and luminosity functions
Y.-J. Sohn +7 more
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