搜索结果: 1-14 共查到“天文学 spiral galaxies”相关记录14条 . 查询时间(0.079 秒)
VLA Reveals Spectacular "Halos" of Spiral Galaxies
VLA Halos Spiral Galaxies
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2015/11/13
A study of spiral galaxies seen edge-on has revealed that "halos" of cosmic rays and magnetic fields above and below the galaxies' disks are much more common than previously thought.An international t...
Probing O VI Emission in the Halos of Edge-on Spiral Galaxies
NGC 4631 NGC 891
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2014/12/24
We have used the Far Ultraviolet Spectroscopic Explorer to search for O VI λλ1031.926, 1037.617 emission in the halos of the edge-on spiral galaxies NGC 4631 and NGC 891. In NGC 4631, we detected O VI...
The relations among 8, 24 and 160 mu m dust emission within nearby spiral galaxies
ISM galaxies
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2014/12/23
We investigate the relations among the stellar continuum-subtracted 8 レm polycyclic aromatic hydrocarbon (PAH 8 レ m) emission, 24 レm hot dust emission and 160 レm cold dust emission in 15 nearby face-o...
Enhanced dust heating in the bulges of early-type spiral galaxies
nearby galaxies galaxies
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2014/12/20
Stellar density and bar strength should affect the temperatures of the cool (T ~ 20–30 K) dust component in the inner regions of galaxies, which implies that the ratio of temperatures in the circumnuc...
Powerful relativistic jets in spiral galaxies
galaxies: jets – BL Lacertae objects: general – quasars: general – galaxies: Seyfert – binaries: general
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2011/10/9
The discovery of high-energy (E>100 MeV) gamma rays from Narrow-Line Seyfert 1 Galaxies (gamma-NLS1s) has confirmed the presence of powerful relativistic jets in this class of active galactic nuclei (...
The AMIGA sample of isolated galaxies: VIII. The rate of asymmetric HI profiles in spiral galaxies
galaxies: evolution – galaxies: interactions – galaxies: ISM – surveys – HI : galaxies
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2011/9/27
(abridged) Measures of the HI properties of a galaxy are among the most sensitive interaction diagnostic at our disposal. We report here on a study of HI profile asymmetries (e.g., lopsidedness) in a ...
Do giant spiral galaxies thwart clusters of young stars?（图）
giant spiral galaxies clusters young stars
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2010/11/30
Astronomers in Scotland and Germany say simple physics may explain a long-standing paradox: why large clusters of young stars tend to reside in relatively small galaxies and not in giants like the Mil...
Spectroscopic observations of a sample of dwarf spiral galaxies. II- Abundance gradients
dwarf spiral galaxies Abundance gradients
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2010/11/10
The oxygen gradient of four dS galaxies has been determined using abundances for several
Hii regions determined with four different methods. The gradient slopes of the three non-barred
galaxies in t...
Asymptotic Orbits in Barred Spiral Galaxies
Instrumentation and Methods for Astrophysics (astro-ph.IM)
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2010/12/28
We study the formation of the spiral structure of barred spiral galaxies, using an $N$-body model. The evolution of this $N$-body model in the adiabatic approximation maintains a strong spiral pattern...
The Larson-Tinsley Effect in the UV: Interacting vs. `Normal' Spiral Galaxies
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/24
We compare the UV-optical colors of a well-defined set of optically-selected pre-merger interacting galaxy pairs with those of normal spirals. The shorter wavelength colors show a larger dispersion fo...
Arm & Interarm Star Formation in Spiral Galaxies
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
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2010/12/24
We investigate the relationship between spiral arms and star formation in the grand-design spirals NGC 5194 and NGC 628 and in the flocculent spiral NGC 6946.
Dwarf and Normal Spiral Galaxies：are they Self-Similar?
Dwarf Normal Spiral Galaxies Self-Similar
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2009/6/18
Dwarf and Normal Spiral Galaxies：are they Self-Similar?
Spiral Galaxies：Requirements for accurate Photometric Bulge/Disk Decomposition
Spiral Galaxies Disk Decomposition Photometric Bulge
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2009/6/11
Spiral Galaxies：Requirements for accurate Photometric Bulge/Disk Decomposition。
THE CONTRIBUTION OF THE DARK MATTER TO THE ROTATION OF SPIRAL GALAXIES AND ITS MASS DISTRIBUTION
DARK MATTER SPIRAL GALAXIES MASS DISTRIBUTION
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2009/3/19
The rotation of a test spiral galaxy with two contributors - the disc
and the corona - is considered. The disc is exponential, whereas the corona is the
dark subsystem. For the latter several varian...