Results 1 to 10 of about 37,993 (251)

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, Knox S. Long, William P. Blair   +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

Stellar structure of irregular galaxies: Edge-on galaxies [PDF]

Astronomy Reports, 2006
13 pages, 7 ...
N. A. Tikhonov
openalex   +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, Alexander, Almoznino, Ana B. Heller, Brosch, Carignan, Conselice, Dohm-Palmer, Dohm-Palmer, Dohm-Palmer, Draper, Edelson, Elchanan Almoznino, Elmegreen, Gerola, Heller, Heller, Hunter, Jog, John J. Salzer, Kaspi, Kornreich, Larson, Leitherer, Levine, Liese van Zee, Mihos, Moffat, Netzer, Noah Brosch, Rudnick, Salzer, Schechter, Skillman, van Zee, van Zee, van Zee, van Zee, van Zee, Walker, Young, Zaritsky   +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, Begum A., Benvenuti P., Caplan J., Dopita M. A., Hidalgo-Gamez A. M., Moles M., Olofsson K., Otte B., Pagel B. E. J., Pilyugin L. S., Schuster W. J., Stasinska G.   +12 more
exaly   +3 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, Jayaram N. Chengalur, Igor D. Karachentsev, Margrita Sharina, Serafim Kaisin   +4 more
openalex   +4 more sources

WLM: Dynamics of an isolated dwarf irregular galaxy under ram pressure in the Local Group

Astronomy & Astrophysics
The Wolf–Lundmark–Melotte (WLM) galaxy is an archetypal dwarf irregular galaxy that has not experienced interactions with major Local Group galaxies within the past 8 Gyr.
Kolhe Neel, Hammer Francois, Yang Yanbin, Namumba Brenda, Chemin Laurent, Amram Philippe, Ianjamasimanana Roger, Carignan Claude   +7 more
doaj   +3 more sources

LBT/MODS spectroscopy of globular clusters in the irregular galaxy NGC 4449 [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
F Annibali, E Morandi, Laura L Watkins
exaly   +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.
N A Tikhonov, O A Galazutdinova
exaly   +3 more sources

The Sculptor dwarf irregular galaxy SDIG: present and past [PDF]

Monthly Notices of the Royal Astronomical Society, 1997
C A Heisler, Marshall L McCALL, R W Hunstead   +2 more
exaly   +2 more sources