The Tremaine-Weinberg method is a well-known model-independent technique for measuring density wave pattern speeds in spiral galaxies. Here we show how it can...
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PublicationUsing the Tremaine-Weinberg method to measure pattern speeds from Halpha velocity maps.
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PublicationUsing the TYCHO Catalogue for AXAF
AXAF, the Advanced X-ray Astrophysics Facility will be the third satellite in the series of great observatories in the NASA program, after the Hubble Space...
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PublicationUtilization of redundant polarized solar spectra to infer the polarization properties of the new generation of large aperture solar telescopes
Spectro-polarimetry plays an important role in the study of solar magnetism and strongly influences the design of the new generation of solar telescopes...
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PublicationUTM, a universal simulator for lightcurves of transiting systems
The Universal Transit Modeller (UTM) is a light-curve simulator for all kinds of transiting or eclipsing configurations between arbitrary numbers of several...
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PublicationUV and optical quantitative spectroscopy of early B-type supergiants in M 33
We present the analysis of UV and optical spectra of M 33 early B-type supergiants. Stellar parameters, metal abundances (Si, Mg, O and N) and mass loss rates...
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PublicationUV and optical variability of the low luminosity quasar PG 1351+64
PG 1351+64 is a bright radio quiet quasar (z = 0.088, mV ≅ 14). IUE observations obtained within few months in 1982 - 1983 showed variations in the 1200 - 2000...
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PublicationUV intensity distributions of the quiet Sun observed with Sunrise
High resolution solar images in the near UV have been obtained with the Solar UV Filtergraph (SUFI) onboard the Sunrise balloon borne observatory, amongst...
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PublicationUV Radiation in the Solar System
The source of UV radiation in the solar system is mainly the Sun. The influence of its various compounds as well as the variability is discussed here. It is...
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PublicationUV Spectroscopy of Metal-Poor Massive Stars in the Small Magellanic Cloud
The Hubble Space Telescope has provided the first clear evidence for weaker winds of metal-poor massive stars in the Small Magellanic Cloud, confirming...