搜索结果: 1-14 共查到“天文学 Spiral galaxies”相关记录14条 . 查询时间(0.14 秒)
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...
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
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
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
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
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
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
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)
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)
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)
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
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
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
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...