Results 191 to 200 of about 67,629 (216)

Are There Jets in Spiral Galaxies?

1983
The absence in spiral galaxies of large-scale collimated jets of radio emission is still little understood. Collimated emission in elliptical galaxies in some cases exceeds by far the optical extent of the galaxy (e.g. in NGC6251). Westerbork observations of NGC4258 (van der Kruit, Oort and Mathewson, 1972) and NGC3079 (de Bruyn, 1977) have provided ...
C. Kotanyi, E. Hummel, J. van Gorkom
openaire   +1 more source

Opacity in Spiral Galaxies

Publications of the Astronomical Society of the Pacific, 1993
The global properties of galaxies such as their observed luminosities may be severely affected by internal obscuration of the stars by dust. In this thesis I examine the amount and extent of this obscuration using the following approaches: For a sample of eight galaxies for which I have obtained multi-waveband optical and near-infrared observations I ...
openaire   +1 more source

Theory of Gravitons in Spiral and Dwarf Galaxy Rotation Curves

Journal of High Energy Physics Gravitation and Cosmology, 2022
Firmin J Oliveira
exaly  

Comparison of the Galaxy with External Spiral Galaxies

1987
In this chapter some areas of comparative exploration in our and external galaxies are reviewed and discussed. Photometric parameters for the Galaxy are derived. The radial scalelength is 5.0 ± 0.5 kpc, and this makes our Galaxy (and M31) unusually large unless Ho = 65 ± 10 km s−1 Mpc−1. Surface photometry of external edge-on galaxies, in particular of
openaire   +1 more source

Formation of a spiral galaxy

ACM SIGGRAPH 2007 computer animation festival, 2007
openaire   +1 more source

Galaxy And Mass Assembly: Galaxy Zoo spiral arms and star formation rates

Monthly Notices of the Royal Astronomical Society, 2022
R Porter-Temple, B W Holwerda, A M Hopkins   +2 more
exaly  

Galaxy zoo builder: Morphological dependence of spiral galaxy pitch angle

Monthly Notices of the Royal Astronomical Society, 2021
Timothy Lingard, Karen L Masters, Coleman Krawczyk   +2 more
exaly  

On the spiral structure of the Milky Way Galaxy

Astronomy Reports, 2011
Yu N Efremov
exaly  

The effects of bar–spiral coupling on stellar kinematics in the Galaxy

Monthly Notices of the Royal Astronomical Society, 2016
G Monari, Benoit Famaey, Arnaud Siebert   +2 more
exaly  

Spiral- and bar-driven peculiar velocities in Milky Way-sized galaxy simulations

Monthly Notices of the Royal Astronomical Society, 2015
Robert J J Grand, Jo Bovy, Daisuke Kawata   +2 more
exaly