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Träfflista för sökning "LAR1:hh srt2:(1985-1989);srt2:(1988)"

Sökning: LAR1:hh > (1985-1989) > (1988)

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1.
  • Mundy, Lee G., et al. (författare)
  • High-resolution images of the Orion molecular ridge in the CS J = 2-1 transition
  • 1988
  • Ingår i: Astrophysical Journal. - Philadelphia, PA : Institute of Physics Publishing (IOPP). - 0004-637X .- 1538-4357. ; 325:1, s. 382-388
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>The authors have constructed 7arcsec.5 resolution images of the CS J = 2-1 emission from a 3arcmin.5 section of the Orion molecular ridge using a maximum entropy algorithm to combine Owens Valley Millimeter-Wave Interferometer and Onsala Space Observatory 20 m data. The resulting images include all of the flux and have positional accuracy of 1arcsec-2arcsec on the small-scale features. The observed section of the ridge includes four condensations. The condensations have dimensions from 0.03 to 0.11 pc and virial massses from 30 to 80 M_sun;. Approximately 70% of the total mass within the 3arcmin region is contained in these condensations.</p>
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2.
  • Weisner, Stefan E.B., 1954- (författare)
  • Factors affecting the internal oxygen supply of <em>Phragmites australis</em> (Cav.) Trin. ex Steudel in situ
  • 1988
  • Ingår i: Aquatic Botany. - Amsterdam : Elsevier. - 0304-3770 .- 1879-1522. ; 31:3-4, s. 329-335
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Oxygen concentration in basal stems of <em>Phragmites australis</em> (Cav.) Trin. ex Steudel was measured in situ, in monospecific stands. The mean O<sub>2</sub> concentration in basal stems, and mean shoot length above water, decreased in deeper water. Oxygen concentration in basal stems was correlated to shoot length above water at a given water depth, and the mean O<sub>2</sub> concentration in basal stems of shoots with similar length above water decreased in deeper water. The results suggest that O<sub>2</sub> transport from shoots to below-ground parts is restricted in deep water by: (1) small shoot length above water; (2) long O<sub>2</sub> transport distance. No influence of substrate redox potential on O<sub>2</sub>concentration in basal stems was found. © Copyright 1988 Elsevier B.V.</p>
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3.
  • Zensus, J. A., et al. (författare)
  • The inner radio jet of 3C273
  • 1988
  • Ingår i: Nature. - London : Nature Publishing Group. - 0028-0836 .- 1476-4687. ; 334:6181, s. 410-412
  • Tidskriftsartikel (refereegranskat)abstract
    • <p>Radio maps of 3C273 obtained with very long baseline interferometry (VLBI) have been limited by low dynamic range and poor north-south resolution resulting from the low declination (2<sup>°</sup>) of this quasar<sup>1</sup>. Dramatic improvement can now be achieved using larger arrays and antennas in the Southern Hemisphere<sup>2,3</sup>. A new VLBI map, made at 5 GHz with angular resolution and dynamic range unsurpassed at this frequency for this source, shows a narrow jet extending to a projected distance l<sub>proj</sub>∼125 h<sup>-;1</sup> parsecs from the core. Superluminal motion exists out to at least lproj≈46h<sup>-1</sup> parsecs. Successive superluminal components emerge from the core and appear to move on a fixed curved path with similar speeds of about 1 milliarcseconds per year. © 1988 Nature Publishing Group.</p>
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