Results 1 to 10 of about 36,611 (209)
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 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
Lopsidedness in dwarf irregular galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 We quantify the amplitude of the lopsidedness, the azimuthal angular asymmetry index, and the concentration of star forming regions, as represented by the distribution of the H$\alpha$ emission, in a sample of 78 late-type irregular galaxies.
Abraham +41 more
core +5 more sources
Diffuse Ionized Gas in the Dwarf Irregular Galaxy DDO 53
Astronomical Journal, 2007 The spectral characteristics throughout the dwarf irregular galaxy DDO 53 are studied. The results are very similar to those for other irregular galaxies: high excitation and low values of the [SII]/Halpha ratio.
A. M. Hidalgo-Gámez +12 more
exaly +3 more sources
Safe, Simple, and Rapid: A Minimally Invasive Coding Technique for Identifying Individuals of the Endangered Mongolian Racerunner (<i>Eremias argus</i>). [PDF]
Ecol EvolThe second figure clearly illustrates the key coding method proposed in this paper. ABSTRACT Individual identification is essential for wildlife population research but commonly relies on invasive methods that may negatively affect animal welfare.
Song JY, Chang MH, Kim SB, Koo KS.
europepmc +2 more sources
Stellar population of the irregular galaxy IC 10 [PDF]
Astronomy Letters, 2009 Based on our observations with the 6-m BTA telescope at the Special Astrophysical Observatory, the Russian Academy of Sciences, and archival Hubble Space Telescope images, we have performed stellar photometry for several regions of the irregular galaxy IC 10, a member of the Local Group.
Tikhonov, N. A., Galazutdinova, O. A.
exaly +3 more sources
The Effect of Irregular Absorption on Galaxy Distribution [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 1950 exaly +3 more sources
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
doaj +1 more source
Cosmic-ray driven dynamo in the medium of irregular galaxy [PDF]
, 2009 We investigate the cosmic ray driven dynamo in the interstellar medium of irregular galaxy. The observations (Chyzy et al. 2000, 2003) show that the magnetic field in irregular galaxies is present and its value reaches the same level as in spiral ...
Chyży +7 more
core +8 more sources
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
doaj +1 more source