Results 31 to 40 of about 12,455 (258)
Delayed Massive-star Mechanical Feedback at Low Metallicity
The Astrophysical Journal, 2023 The classical model of massive-star mechanical feedback is based on effects at solar metallicity ( Z _⊙ ), yet feedback parameters are very different at low metallicity.
Michelle C. Jecmen, M. S. Oey
doaj +1 more source
The CO contents of dwarf irregular galaxies
The Astrophysical Journal, 1987 A search has been conducted for CO in 16 dwarf irregular galaxies selected to span a wide range of infrared luminosity and color. CO was detected in six dwarf galaxies spanning the entire range in optical color and IR luminosity. The dwarf galaxies extend by three orders of magnitude in luminosity the correlation between IR and CO luminosities found ...
TACCONI, LJ, Young, JS
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Redshift, metallicity and size of two extended dwarf Irregular galaxies. A link between dwarf Irregulars and ultra diffuse galaxies? [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We present the results of the spectroscopic and photometric follow-up of two field galaxies that were selected as possible stellar counterparts of local high velocity clouds. Our analysis shows that the two systems are distant (D>20 Mpc) dwarf irregular galaxies unrelated to the local HI clouds.
Bellazzini, M. +7 more
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Rotationally Supported Virgo Cluster Dwarf Elliptical Galaxies: Stripped Dwarf Irregular Galaxies?
The Astronomical Journal, 2004 New observations of 16 dwarf elliptical galaxies in the Virgo Cluster indicate that at least seven dEs have significant velocity gradients along their optical major axis, with typical rotation amplitudes of 20-30 km/s. Of the remaining nine galaxies in this sample, 6 have velocity gradients less than 20 km/s kpc^{-1} while the other 3 observations had ...
van Zee, L. +2 more
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H i Clouds in LITTLE THINGS Dwarf Irregular Galaxies [PDF]
The Astronomical Journal, 2019 Abstract We identify 814 discrete H i clouds in 40 dwarf irregular galaxies from the LITTLE THINGS survey using an automated cloud-finding algorithm. The cloud masses range from ∼103 to 107 M ⊙, have a surface density averaged over all of the clouds of ∼9.65 M ⊙ pc−2, and constitute 2%
Deidre A. Hunter +2 more
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Dark satellites and the morphology of dwarf galaxies [PDF]
, 2012 One of the strongest predictions of the LambdaCDM cosmological model is the presence of dark satellites orbiting all types of galaxies. We focus here on the dynamical effects of such satellites on disky dwarf galaxies, and demonstrate that these ...
Bergvall +16 more
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DDO 43: A Prototypical Dwarf Irregular Galaxy? [PDF]
The Astronomical Journal, 2005 We present sensitive and high resolution 21 cm observations of the dwarf irregular (dIm) galaxy DDO 43, in conjunction with optical broad and narrow band images in U, B, V, and Halpha. The observations are used to examine the relationship between its HI morphology and kinematics to past and present star formation.
Simpson, Caroline E. +2 more
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The intrinsic shapes of dwarf irregular galaxies [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2013 Abstract We use the measured B-band axial ratios of galaxies from an updated catalogue of Local Volume galaxies to determine the intrinsic shape of dwarf irregular galaxies (de Vaucouleurs’ morphological types 8–10). We find that the shapes change systematically with luminosity, with fainter galaxies being thicker.
Roychowdhury, Sambit +3 more
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New Probable Dwarf Galaxies in Northern Groups of the Local Supercluster [PDF]
, 2007 We have searched for nearby dwarf galaxies in 27 northern groups with characteristic distances 8-15 Mpc based on the Second Palomar Sky Survey prints.
A. Klypin +23 more
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Molecular Clouds in Dwarf Irregular Galaxies [PDF]
Highlights of Astronomy, 1989 The study of molecular clouds in dwarf galaxies was, until recently, an arduous task and provided detections in only a handful of sources (see Thronson and Bally 1986; Wiklind et al. 1986; Tacconi and Young 1987; Arnoult et al. 1988). Line strengths observed in CO were small (<100mK) and measurements were confined to one position per source, thus ...
openaire +1 more source