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Gravitational Lensing by Spiral Galaxies [PDF]
The Astrophysical Journal, 1998 27 pages, 7 postscript figures, submitted to ...
Charles R. Keeton +1 more
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The HI Halo of Spiral Galaxies
Astrophysics and Space Science, 2004 The results of observational studies on the vertical HI density distribution and kinematics of the disks of spiral galaxies are reported and discussed. Attention is drawn to the presence of HI emission, unknown before and here referred to as the `beard', which has anomalous structure and kinematics, different from the known cold HI disk. This component
Gustaaf van Moorsel +3 more
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The optical polarization of spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2000 Scattering of starlight by dust, molecules and electrons in spiral galaxies will produce a modification of the direct intensity and a polarization in the observed light. We treat the case where the distribution of scatterers can be considered to be optically thin, and derive semi-analytic expressions for the resolved intensity and polarized intensity ...
Edouard Audit, John F. L. Simmons
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Nuclear Spirals in Galaxies [PDF]
, 2008 6 pages, 4 figures, to appear in ""Mapping the Galaxy and Nearby Galaxies", Eds. K. Wada and F.
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Assembling Spiral Galaxies [PDF]
Symposium - International Astronomical Union, 1996 Nearby spiral galaxies offer vital clues to some of the most fundamental questions about galaxy formation and evolution: What is the star formation history of the universe, past and future? When did disks form, during the final stages of a single primeval collapse, or as a continuous or episodic process?
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ULTRALIGHT SCALARS AND SPIRAL GALAXIES [PDF]
Modern Physics Letters A, 2001 We study some possible astrophysical implications of a very weakly coupled ultralight dilaton-type scalar field. Such a field may develop an (approximately stable) network of domain walls. The domain wall thickness is assumed to be comparable with the thickness of the luminous part of the spiral galaxies. The walls provide trapping for galactic matter.
Gregory Gabadadze +2 more
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Exploring the evolution of spiral galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2002 We have constructed a family of simple models for spiral galaxy evolution to allow us to investigate observational trends in star formation history with galaxy parameters. The models are used to generate broad band colours from which ages and metallicities are derived in the same way as the data.
Eric F. Bell +2 more
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Magnetic fields in spiral galaxies [PDF]
The Astronomy and Astrophysics Review, 1990 Published in A&ARev (2016) 24 ...
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ON THE FRACTION OF BARRED SPIRAL GALAXIES [PDF]
The Astrophysical Journal, 2010 We investigate the stellar masses of strongly barred spiral galaxies. Our analysis is based on a sample of ~14000 visually-classified nearby galaxies given in Nair & Abraham 2010(a). The fraction of barred spiral galaxies is found to be a strong function of stellar mass and star formation history, with a minimum near the characteristic mass at ...
Preethi Nair, Roberto Abraham
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Scaling Relations of Spiral Galaxies [PDF]
The Astrophysical Journal, 2007 We construct a large data set of global structural parameters for 1300 field and cluster spiral galaxies and explore the joint distribution of luminosity L, optical rotation velocity V, and disk size R at I- and 2MASS K-bands. The I- and K-band velocity-luminosity (VL) relations have log-slopes of 0.29 and 0.27, respectively with sigma_ln(VL)~0.13, and
Courteau, Stéphane +6 more
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