Results 1 to 10 of about 2,544 (230)
Lopsidedness in dwarf irregular galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 42 pages, LaTex.
Ana Heller +4 more
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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
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Magnetic Fields in Irregular Galaxies [PDF]
Highlights of Astronomy, 2002 AbstractRadio data of large irregular galaxies reveal some extended synchrotron emission with a substantial degree of polarization. In the case of NGC 4449 strong galaxy-scale regular magnetic fields were found, in spite of the lack of ordered rotation required for the conventional dynamo action.
K. T. Chyży
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Starbursts in Ring and Irregular Galaxies
Publications of the Astronomical Society of Australia, 1991 AbstractThis paper presents the current status of a Ph.D. project undertaken to search for extended-scale bursts of star formation (> 1 kpc) in irregular and collisionally produced ring galaxies, principally in the southern half of the sky. Results of recent 8.4 GHz radio continuum observations and UBVRI CCD imaging of some of the program galaxies ...
V. J. McIntyre, W. J. Zealey
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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
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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 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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On the oxygen abundance deficiency in irregular galaxies [PDF]
New Astronomy Reviews, 2000 8 pages, 7 figures, accepted for publication in Astronomy and ...
L. S. Pilyugin, Federico Ferrini
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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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