Results 161 to 170 of about 1,066 (187)

Dark matter in spiral galaxies

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1986
Abstract Mass models of spiral galaxies based on the observed light distribution, assuming constant M /L for bulge and disc, are able to reproduce the observed rotation curves in the inner regions, but fail to do so increasingly towards and beyond the edge of the visible material.
VANALBADA, TS, SANCISI, R
openaire   +2 more sources

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

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

A multiwavelength study of spiral structure in galaxies. II. Spiral arms in deep optical observations

Monthly Notices of the Royal Astronomical Society, 2023
Aleksandr Mosenkov, Vladimir Reshetnikov, Alexander Marchuk   +2 more
exaly  

Galaxies decomposition with spiral arms – I: 29 galaxies from S4G

Monthly Notices of the Royal Astronomical Society, 2023
Aleksandr Mosenkov, Alexander Marchuk, Sergey Savchenko   +2 more
exaly  

Formation of a spiral galaxy

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

Rotation curves and scaling relations of extremely massive spiral galaxies

Monthly Notices of the Royal Astronomical Society, 2021
Lorenzo Posti, Patrick M Ogle, Thomas Jarrett   +2 more
exaly  

Spiral structure in nearby galaxies - I. Sample, data analysis and overview of results

Monthly Notices of the Royal Astronomical Society, 2011
Clarke C, Kennicutt R C
exaly  

Magnetic fields in spiral galaxies

Astronomy and Astrophysics Review, 2015
Beck Rainer
exaly  

What determines the sizes of bars in spiral galaxies?

Monthly Notices of the Royal Astronomical Society, 2019
Peter Erwin, Erwin Peter
exaly