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  • 1
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    A Palomar Observatory Sky Survey atlas of selected molecular clouds (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Forty-three cold, dense molecular clouds are digitized from the Palomar Observatory Sky Survey glass plates and presented with epoch 1950.0 equatorial coordinates. Regardless of the cloud's extent, the digitized area is limited to a 23 arcmin square on the sky with pixel size of about 1.3 arcsec. The optical maps presented herein are useful for comparing complementary molecular cloud maps from radio or infrared instruments and can be obtained in FITS format for use on astronomical image-processing systems.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal Supplement Series (ISSN 0067-0049); 64; 127-129
    Format: text
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  • 2
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    Evidence for extended radio emission surrounding RX Puppis (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Evidence for an approximately 1-arcsec extended structure in 6 cm continuum emission emanating from the symbiotic star system RX Puppis is reported. Hourly continuum flux changes were not detected as suggested in previous radio experiments by others. The observations indicate that the predominant nature of the radio emission is thermal and consistent with an optically thick stellar wind emanating from the symbiotic star system. The results presented here are discussed with regard to other similar stellar binary systems.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 301; 877-880
    Format: text
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  • 3
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    Absolute brightness temperature measurements at 3.5-mm wavelength (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Careful observations have been made at 86.1 GHz to derive the absolute brightness temperatures of the sun (7914 + or - 192 K), Venus (357.5 + or - 13.1 K), Jupiter (179.4 + or - 4.7 K), and Saturn (153.4 + or - 4.8 K) with a standard error of about three percent. This is a significant improvement in accuracy over previous results at millimeter wavelengths. A stable transmitter and novel superheterodyne receiver were constructed and used to determine the effective collecting area of the Millimeter Wave Observatory (MWO) 4.9-m antenna relative to a previously calibrated standard gain horn. The thermal scale was set by calibrating the radiometer with carefully constructed and tested hot and cold loads. The brightness temperatures may be used to establish an absolute calibration scale and to determine the antenna aperture and beam efficiencies of other radio telescopes at 3.5-mm wavelength.
    Keywords: ASTRONOMY
    Type: IEEE Transactions on Antennas and Propagation; AP-28; May 1980
    Format: text
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  • 4
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    C2 imagery of the inner coma of Comet IRAS-Araki-Alcock (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: May 10, 1983 observations of the comet IRAS-Araki-Alcock are analyzed to determine the spatial molecular abundance of C2 in the inner coma, via the Delta-v = +1 Swan band sequence near 4690 A. The observations indicate a deficiency of C2 emission across a projected diameter of about 2000 km that is centered on the peak of continuum emission. Comet imagery indicates a sunward-pointing coma that suggests an outburst of subsurface volatile ices through a nonvolatile surface crust, as predicted for periodic comets. These results are discussed in the framework of instrumental and observational constraints.
    Keywords: ASTRONOMY
    Type: Icarus (ISSN 0019-1035); 63; 339-346
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  • 5
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    New interstellar molecular transitions in the 2 millimeter range (1981)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A Sgr B2 kinetic temperature of about 47 K is derived based on observations of K components of the 9K-8K transition of CH3CCH. Interstellar line emission is detected in the 2 mm wavelength region from SO, (S-34)O, SO2, CH3OH, CH3CCH, CH3CH2CN, HC3N, and nine unidentified transitions. The methylacetylene K component data combined with the derived data reduction technique, demonstrates the utility of the molecule as a temperature probe of molecular clouds when two or more rotational transitions are observed. Evidence for the existence of interstellar HNO is presented, and an attempt is made to detect sulfuric acid, formic anhydride, and the 0-18 isotopic for CO2 in interstellar clouds and in the Venusian atmosphere during inferior conjunction.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal; vol. 251
    Format: text
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  • 6
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    Radio searches for additional interstellar molecules (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Observations in the 2-mm wavelength range are reported which yield new interstellar molecular transitions of NH2CHO, SO2, H2CCO, U150820.5, and U150850.0 toward Sgr B2, and SO2, CH2CHCN, HCOOCH3, and U153513.0 toward Orion A. The first interstellar searches for HOCl, CH3CH2CCH, and CH3SiH3 were conducted, but these species were not detected. During these observations limits were also obtained on 2-mm wave transitions of N2O and NaOH toward several galactic sources of molecular emission.
    Keywords: ASTRONOMY
    Type: Astronomy and Astrophysics (ISSN 0004-6361); 126; 2 c
    Format: text
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