Comparison of two approaches for determining ground-water discharge and pumpage in the lower Arkansas River basin, Colorado, 1997-98 /

Includes bibliographical references (p. 39).Mode of access: Internet

2007 Ohio Grape & Wine Conference: February 12-13, 2007: Presentations

What is sustainable viticulture and how do you practice it? / Clifford P. Ohmart -- Sustainable viticulture in the East; special challenges and opportunities / Timothy E. Martinson -- The Stratus Project: from philosophy to awards / Jean-Laurent Groux -- Chardonnay winemaking techniques / Randy Ullom -- Ohio quality wine: a new quality assurance program / Michelle Widner -- Sustainable agriculture in Ohio / Alan Sundermeier -- Sustainable disease management / Mike Ellis -- Sustainability and pest management in viticulture / Roger N. Williams and Dan S. Fickle -- Cabernet sauvignon building blocks / Randy Ullom -- A brief overview of several malolactic fermentation studies at OARDC / Todd Steiner -- Off-premise wine sales panel / John Switzer, Ken Bement -- OSU Extension: an evolving organization / Keith Smith -- Results of the Ohio Grape and Wine Industry survey / Imed Dami, Todd Steiner, and Taehyun Ji -- Characterization of aroma profiles of Traminette grape grown in different climatic regions / Taehyun Ji and Imed Dami -- Overview of trip to wine regions in Germany / Michelle Widner, Greg Johns, Andy Troutman -- Integrated pest management (IPM) in vineyards / Clifford P. Ohmart -- Sustainable weed management in the vineyard / Doug Doohan -- Understanding seasonal patterns of nitrogen supply and demand in managing your vineyard / Timothy E. Martinson -- Making good wines great: the art of assemblage at Stratus / Jean-Laurent Groux -- New theory and research on tannins, proteins and their relationship to color stabilization and sensory effects in red wine / Russell Robbins -- Cost share marketing and promotion program / Christy Eckstein -- Sustainable practices and organics-producer's experience panel / John Santos, Ken Tarsitano, Patti Iubel

Revealing the Structure of a Pre-Transitional Disk: The Case of the Herbig F Star SAO 206462 (HD 135344B)

International audienceSAO 206462 (HD 135344B) has previously been identified as a Herbig F star with a circumstellar disk with a dip in its infrared excess near 10 μm. In combination with a low accretion rate estimated from Br γ, it may represent a gapped, but otherwise primordial or "pre-transitional" disk. We test this hypothesis with Hubble Space Telescope coronagraphic imagery, FUV spectroscopy and imagery and archival X-ray data, and spectral energy distribution (SED) modeling constrained by the observed system inclination, disk outer radius, and outer disk radial surface brightness (SB) profile using the Whitney Monte Carlo Radiative Transfer Code. The essentially face-on (i lsim 20°) disk is detected in scattered light from 0farcs4 to 1farcs15 (56-160 AU), with a steep (r -9.6) radial SB profile from 0farcs6 to 0farcs93. Fitting the SB data requires a concave upward or anti-flared outer disk, indicating substantial dust grain growth and settling by 8 ± 4 Myr. The warm dust component is significantly variable in near to mid-IR excess and in temperature. At its warmest, it appears confined to a narrow belt from 0.08 to 0.2 AU. The steep SED for this dust component is consistent with grains with a<= 2.5 μm. For cosmic carbon to silicate dust composition, conspicuous 10 μm silicate emission would be expected and is not observed. This may indicate an elevated carbon to silicate ratio for the warm dust, which is not required to fit the outer disk. At its coolest, the warm dust can be fit with a disk from 0.14 to 0.31 AU, but with a higher inclination than either the outer disk or the gaseous disk, providing confirmation of the high inclination inferred from mid-IR interferometry. In tandem, the compositional and inclination difference between the warm dust and the outer dust disk suggests that the warm dust may be of second-generation origin, rather than a remnant of a primordial disk component. With its near face-on inclination, SAO 206462's disk is a prime location for planet searches. Based in part on data collected at Subaru Telescope, which is operated by the National Astronomical Observatory of Japan