Results 1 to 10 of about 611,346 (300)
Giant Halos in Dwarf Irregular Galaxies vs. Dwarf Elliptical Galaxies [PDF]
Proceedings of the International Astronomical Union, 2005 We present a discovery of a giant stellar halo in NGC 6822, a dwarf irregular galaxy in the Local Group. This halo is mostly made of old red giants, showing striking features: 1) it is several times larger than the main body of the galaxy seen in the ...
Hwang, Narae, Lee, Myung Gyoon
core +2 more sources
FIGGS Faint Irregular Galaxies GMRT Survey [PDF]
, 2008 The Faint Irregular Galaxies GMRT Survey (FIGGS) is a large program aimed at providing a comprehensive and statistically robust characterisation of the neutral ISM properties of faint (M_B > -14.5), nearby, gas rich, dwarf irregular galaxies using the Giant Metrewave Radio Telescope (GMRT). Here we briefly describe the survey and discuss some of the
Ayesha Begum +4 more
openalex +4 more sources
Stellar structure of irregular galaxies: Edge-on galaxies [PDF]
Astronomy Reports, 2006 13 pages, 7 ...
N. A. Tikhonov
openalex +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
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
Empirical dependencies for irregular dwarf galaxies [PDF]
Astronomical and Astrophysical TransactionsIn this work, we search for empirical relationships for irregular dwarf galaxies using a collection of observational data published in the NASA and HyperLeda databases. Using a complex statistical analysis, we calculated correlation coefficients between various physical parameters of irregular dwarf galaxies.
Komiljon Tillaboev +2 more
openalex +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
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 ...
Kepley, Amanda A. +6 more
openaire +4 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
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
doaj +1 more source