Results 141 to 150 of about 599,828 (297)
A survey of nearby galaxies for CO [PDF]
, 1980 We have made a survey of the nuclei of 81 galaxies for the 1-) line of CO. 38 of the galaxies are from a complete sample with recession velocity ≦400 km s-1 and 21-cm line strength ≧10-27 Wm-2, and the remainder represent nearby galaxies with weaker or ...
Phillips, T. G. +2 more
core
Interstellar gas motions around massive star formation regions in the nearby dwarf galaxy DDO43
Acta PolytechnicaAreas of massive star formation are strongly influenced by stellar winds and supernovae, therefore, enhanced turbulent flows are expected. We analyse high-quality Karl G. Jansky Very Large Array observations of the neutral hydrogen gas content of DDO43,
Enikő Pichler +4 more
doaj +1 more source
Galaxy Morphological Classification with Zernike Moments and Machine Learning Approaches
The Astrophysical Journal Supplement SeriesClassifying galaxies is an essential step for studying their structures and dynamics. Using GalaxyZoo2 (GZ2) fractions thresholds, we collect 545 and 11,735 samples in nongalaxy and galaxy classes, respectively.
Hamed Ghaderi +2 more
doaj +1 more source
Photometry of the nearby irregular galaxy, NGC 6822 [PDF]
, 1967 Susan E. Kayser
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ON THE STAR FORMATION LAW FOR SPIRAL AND IRREGULAR GALAXIES [PDF]
The Astrophysical Journal, 2015 A dynamical model for star formation on a galactic scale is proposed in which the interstellar medium is constantly condensing to star-forming clouds on the dynamical time of the average midplane density, and the clouds are constantly being disrupted on the dynamical time scale appropriate for their higher density.
openaire +4 more sources
A Luminous X-Ray Active Galactic Nucleus in the Dwarf–Dwarf Galaxy Merger RGG 66
The Astrophysical JournalWe present the discovery of a luminous X-ray active galactic nucleus (AGN) in the dwarf galaxy merger RGG 66. The black hole is predicted to have a mass of M _BH ∼ 10 ^5.4 M _⊙ and to be radiating close to its Eddington limit ( L _bol / L _Edd ∼ 0.75 ...
Seth J. Kimbrell, Amy E. Reines
doaj +1 more source
The Kinematics of Distant Galactic Planetary Nebulae and the Rotation of the Disc Population of a Magellanic-Type Irregular Galaxy [PDF]
, 1969 B. L. Webster
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Stellar Abundances in Dwarf Irregular Galaxies
, 2003 Dwarf irregular galaxies appear to have undergone very slow chemical evolution since they have low nebular abundances, but have had ongoing star formation over the past 15 Gyr. They are too distant for red giant abundance analyses to examine the details of their chemical evolution, however the isolated, bright blue supergiants do allow us to determine ...
Venn, K.A. +3 more
openaire +3 more sources
UniverseDistinguishing galaxies as either fast or slow rotators plays a vital role in understanding the processes behind galaxy formation and evolution. Standard techniques, which are based on the λR spin parameter obtained from stellar kinematics, frequently ...
Amirmohammad Chegeni +4 more
doaj +1 more source
A neutral-hydrogen survey of the dwarf irregular galaxy Leo A [PDF]
, 1978 N. J. Allsopp
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