Výsledky vyhledávání - "Woodruff, H."

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The Pulsation of Chi Cygni Imaged by Optical Interferometry; a Novel Technique to Derive Distance and Mass of Mira Stars

Autor: Lacour, S., Thiébaut, E., Perrin, G., Meimon, S., Haubois, X., Pedretti, E., Ridgway, S., Monnier, J. D., Berger, J. P., Schuller, P. A., Woodruff, H., Poncelet, A., Coroller, H. Le, Millan-Gabet, R., Lacasse, M., Traub, W.

Publikováno v: Astrophys.J.707:632-643,2009

We present infrared interferometric imaging of the S-type Mira star Chi Cygni. The object was observed at four different epochs in 2005-2006 with the IOTA optical interferometer (H band). Images show up to 40% variation in the stellar diameter, as we

Externí odkaz: http://arxiv.org/abs/0910.3869

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The Keck Aperture Masking Experiment: spectro-interferometry of 3 Mira Variables from 1.1 to 3.8 microns

Autor: Woodruff, H. C., Ireland, M. J., Tuthill, P. G., Monnier, J. D., Bedding, T. R., Danchi, W. C., Scholz, M., Townes, C. H., Wood, P. R.

Publikováno v: Astrophys.J.691:1328-1336,2009

We present results from a spectro-interferometric study of the Miras o Cet, R Leo and W Hya obtained with the Keck Aperture Masking Experiment from 1998 Sep to 2002 Jul. The spectrally dispersed visibility data permit fitting with circularly symmetri

Externí odkaz: http://arxiv.org/abs/0811.1642

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Getting Lucky with Adaptive Optics: Fast AO Image Selection in the Visible with a Large Telescope

Autor: Law, N. M., Mackay, C. D., Dekany, R. G., Ireland, M., Lloyd, J. P., Moore, A. M., Robertson, J. G., Tuthill, P., Woodruff, H.

Publikováno v: Astrophys.J.692:924-930,2009

We describe the results from a new instrument which combines Lucky Imaging and Adaptive Optics to give the first routine direct diffraction-limited imaging in the visible on a 5m telescope. With fast image selection behind the Palomar AO system we ob

Externí odkaz: http://arxiv.org/abs/0805.1921

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The Keck Aperture Masking Experiment: Multi-Wavelength Observations of 6 Mira Variables

Autor: Woodruff, H. C., Tuthill, P. G., Monnier, J. D., Ireland, M. J., Bedding, T. R., Lacour, S., Danchi, W. C., Scholz, M.

The angular diameters of six oxygen rich Mira-type long-period variables have been measured at various near-infrared (NIR) wavelengths using the aperture masking technique in an extensive observing program from 1997 Jan to 2004 Sep. These data sets s

Externí odkaz: http://arxiv.org/abs/0709.3878

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Interferometric observations of the Mira star o Ceti with the VLTI/VINCI instrument in the near-infrared

Autor: Woodruff, H. C., Eberhardt, M., Driebe, T., Hofmann, K. -H., Ohnaka, K., Richichi, A., Schertl, D., Schoeller, M., Scholz, M., Weigelt, G., Wittkowski, M., Wood, P. R.

Publikováno v: Astron.Astrophys. 421 (2004) 703-714

We present K-band commissioning observations of the Mira star prototype o Cet obtained at the ESO Very Large Telescope Interferometer (VLTI) with the VINCI instrument and two siderostats. The observations were carried out between 2001 October and Dec

Externí odkaz: http://arxiv.org/abs/astro-ph/0404248

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