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  1. No Access

    Book and Conference Proceedings

    Planetary Nebulae Beyond the Milky Way

    Proceedings of the ESO Workshop held at Garching, Germany, 19-21 May, 2004

    L. Stanghellini, J. R. Walsh… in ESO ASTROPHYSICS SYMPOSIA European Southern Observatory (2006)

  2. No Access

    Chapter and Conference Paper

    Planetary Nebulae as Dynamical Tracers: Mass-to-Light-Ratio Gradients in Early-Type Galaxies

    Planetary Nebulae (PNe) have enabled mass-to-light ratios (M/L) in earlytype galaxies to be constrained to unprecedented distance from the center, showing in some cases clear evidence of increasing M/L, in oth...

    N.R. Napolitano, A.J. Romanowsky, M. Capaccioli… in Planetary Nebulae Beyond the Milky Way (2006)

  3. No Access

    Chapter and Conference Paper

    Galaxy Dynamics and the PNe Population

    This review attempts to place the observations of extragalactic planetary nebulae in the context of galactic dynamics. From this point of view only the radial velocities of the PNe is important. We have built ...

    N. G. Douglas in Planetary Nebulae Beyond the Milky Way (2006)

  4. No Access

    Chapter and Conference Paper

    Galaxy Dynamics and the PNe Population

    This review attempts to place the observations of extragalactic planetary nebulae in the context of galactic dynamics. From this point of view only the radial velocities of the PNe is important. We have built ...

    N. G. Douglas in Planetary Nebulae Beyond the Milky Way (2006)

  5. No Access

    Chapter and Conference Paper

    Planetary Nebulae as Dynamical Tracers: Mass-to-Light-Ratio Gradients in Early-Type Galaxies

    Planetary Nebulae (PNe) have enabled mass-to-light ratios (M/L) in earlytype galaxies to be constrained to unprecedented distance from the center, showing in some cases clear evidence of increasing M/L, in oth...

    N.R. Napolitano, A.J. Romanowsky, M. Capaccioli… in Planetary Nebulae Beyond the Milky Way (2006)

  6. No Access

    Chapter and Conference Paper

    A Dedicated Camera For Extragalactic Planetary Nebulae: The Planetary Nebula Spectrograph

    Photometry in [OIII] emission of Planetary Nebulae in external galaxies can be used to determine distances as great as that of the Virgo cluster and beyond, as forcefully argued elsewhere during this conferenc...

    N. G. Douglas, K. Taylor, K. C. Freeman, T. S. Axelrod in Planetary Nebulae (1997)

  7. No Access

    Chapter

    Distance and Metallicity of HVCS

    Table 1 summarizes results of programs to determine distances and metallicities of high-velocity clouds (s, HVCsee Wakker 1991, IAU Symp 144, 27 for a general review). Reliable absorption is reported for one s...

    B. P. Wakker, H. Van Woerden, U. J. Schwarz… in Unsolved Problems of the Milky Way (1996)

  8. No Access

    Article

    Inhibition and stimulation of yeast growth by acetaldehyde

    Acetaldehyde at above about 0.3 g/l inhibited yeast growth, suggesting that it may contribute to product inhibition in alcohol fermentations when present at high concentrations intracellularly. The toxic effec...

    G. A. Stanley, N. G. Douglas, E. J. Every, T. Tzanatos… in Biotechnology Letters (1993)

  9. No Access

    Article

    Heterodyned, Holographic Spectroscopy — First results with the FRINGHE spectrometer

    We describe a novel class of instrument called the Heterodyned Holographic Spectrometer. It uses a grating, but the measurements are taken in the Fourier domain. This combines the high etendue characteristic o...

    N. G. Douglas, H. R. Butcher, W. A. Melis in Astrophysics and Space Science (1990)

  10. No Access

    Article

    Frequency detuning measurements in a low-power gyrotron

    Frequency detuning in the University of Sydney Gyrotron II has been measured for a number of modes in the vicinity of the TE0 14 1 mode at 183 GHz. The main features of the observations agree with theory and the ...

    G. F. Brand, N. G. Douglas, M. Gross… in International Journal of Infrared and Mill… (1983)

  11. No Access

    Article

    Tuneable millimeter-wave gyrotrons

    In the course of develo** a low-power, tuneable millimeter-wave source, two gyrotrons have been constructed. Gyrotron I was a fixed-frequency device operating at 120 GHz while Gyrotron II produced more than ...

    G. F. Brand, N. G. Douglas, M. Gross… in International Journal of Infrared and Mill… (1982)