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  • 1980-1984  (32)
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  • 11
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    Concept for a neutrino or antineutrino telescope (1981)
    Oxford University Press
    Details
    Publikationsdatum: 1981-07-01
    Print ISSN: 0035-8711
    Digitale ISSN: 1365-2966
    Thema: Physik
    Publiziert von Oxford University Press im Namen von The Royal Astronomical Society.
    Standort Signatur Erwartet Verfügbarkeit
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    AKTUELLE ARTIKEL
  • 12
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    The 157 Micron (C II) Luminosity of the Galaxy (1984)
    In:  CASI
    Details
    Publikationsdatum: 2014-09-17
    Beschreibung: The diffuse far infrared (C II) emission of several regions of the Galactic plane were sampled. Mechanisms for the excitation of carbon ions are discussed in reference to the role of carbon ion transitions in cooling diffuse atomic hydrogen. Observations indicate that the C II emission probably arises at the edges of giant molecular clouds and appears to have localized knot-like features. The total C II luminosity of the Galaxy is approximately 6 to 10 to the 7th power L(solar).
    Schlagwort(e): ASTRONOMY
    Materialart: NASA. Ames Research Center Airborne Astron. Symp.; p 260-265
    Format: text
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    NASA TECHNICAL REPORTS
  • 13
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    A Far Infrared Echelle Spectrometer for the Kuiper Airborne Observatory (1984)
    In:  CASI
    Details
    Publikationsdatum: 2014-09-18
    Beschreibung: A liquid-helium-cooled grating spectrometer (CGS) is being developed as a facility instrument for the Kuiper Airborne Observatory (KAO), primarily to study for infrared lines originating in the interstellar medium. A maximum resolving power of approximately 6000 is achieved by means of a 45 cm long Echelle grating and is optically capable of operating in the spectral range from 25 to 300 microns. An array of detectors is used to simultaneously measure a line and the adjacent continuum from astronomical sources. Currently six detectors allow measurements in the 30 to 120 micron spectral band. The instrument, its operation, and its performance are described.
    Schlagwort(e): ASTRONOMY
    Materialart: Airborne Astron. Symp.; p 313-319
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 14
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    The galaxy's 157 micron (C II) emission - Observations by means of a spectroscopic lunar occultation technique (1983)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Galactic (C II) 157 micron, fine-structure emission was estimated. At a Galactic longitude of 8 deg, the peak power observed in a 7' x 7' field is approx. 5 x 10 to the -9 Watt. The method used to detect this radiation involved chopping against the cold side of the Moon. Previously announced in STAR as N83-24437
    Schlagwort(e): ASTRONOMY
    Materialart: Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X); 268; May 15
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 15
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    The Orion Nebula - Large-scale distribution of far-infrared and submillimeter line emission (1982)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Attention is given to the results of a study of radiative cooling in the interstellar clouds of the Orion Nebula through the emission of far-IR and submillimeter radiation. That the gas is 'clumpy' in the ionized region of the nebula is indicated by the far-IR observations of doubly ionized oxygen. With respect to the edges of the ionized region, the excitation temperature for the 3P1 state is 228 K and the observed emission can be plausibly associated with either ionization or shock fronts at the interface between the ionized and neutral region. Consideration is also given to the possibility of an ionized carbon halo, the turbulent state of the molecular cloud, and the need for further laboratory and theoretical analyses.
    Schlagwort(e): ASTROPHYSICS
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 16
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    Spectrophotometry of Saturn and its rings from 60 to 180 microns (1983)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Comparisons of Saturn observations at far-IR and submillimeter wavelengths, obtained during the earth's March 1980 passage through the plane of Saturn's rings, with spectroscopic observations obtained at an earlier time when the ring plane tilt angle was 21.8 deg, allow a separation of disk and ring contributions to the flux observed in this wavelength range. It is noted that the observed disk emission at 60-180 microns corresponds to a brightness temperature of 104 + or 2 K, and that the brightness temperature of the rings drops 20 K in the 60-80 micron range. An improved estimate of total Saturnian surface brightness is derived which corresponds to an effective temperature of 96.1 + or - 1.6 K.
    Schlagwort(e): LUNAR AND PLANETARY EXPLORATION
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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    NASA TECHNICAL REPORTS
  • 17
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    Far-infrared emission line and continuum observations of NGC 7027 (1981)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The first observation of a fine-structure transition in NGC 7027 at wavelengths greater than 30 microns is reported. The flux in the 63.2-micron line is found to be approximately 10 to the -16th W/sq cm. It is noted that if NGC 7027 lies at 1 kpc, this corresponds to a luminosity, in the line, approximately 30 times greater than the solar luminosity. The flux of the 88.35-micron line is less than 10 to the -17th W/sq cm, and the upper limit to the line flux at 51.8 microns is found to be 10 to the -16th W/sq cm. These upper limits imply an electron density that is less than 1.6 x 10 to the 5th/cu cm. It is noted that the continuum measurements obtained support a dust temperature of 90 K with an emissivity approximately equal to the reciprocal of the square of the wavelength. The data exclude grain materials whose wavelength-dependent emissivity (the reciprocal of the wavelength raised to nth power) requires n to be outside the range between 1.6 and 2, unless the temperature varies drastically across the dust cloud
    Schlagwort(e): ASTRONOMY
    Materialart: Astrophysical Journal; vol. 243
    Format: text
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    NASA TECHNICAL REPORTS
  • 18
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    Far-infrared polarization of the Kleinmann-Low Nebula (1980)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Further data on the polarization of the far-infrared (wavelength greater than 40 microns) emission from the Orion Nebula shows no evidence for polarized emission by aligned grains. Results at wavelength about 71-115 microns are consistent with a small (about 1.5%) absorption-induced polarization with about the same position angle on the sky as the polarization measured at shorter wavelengths.
    Schlagwort(e): ASTROPHYSICS
    Materialart: Astronomical Journal; 85; Oct. 198
    Format: text
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  • 19
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    The mass of hot, shocked CO in Orion - First observations of the J = 17-J = 16 transition at 153 microns (1982)
    In:  Other Sources
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: Observations of the Kleinmann-Low Nebula in Orion detected the J = 17-J = 16 transition of CO at 153 microns and at a flux level of 7 x 10 to the -17th W/sq cm. The total mass of hot (not less than about 750 K) carbon monoxide in the nebula is estimated at 8 x 10 to the 30th g, and the total hydrogen mass at this temperature is assessed to be about 1.5 solar masses. A CO column density of about 4 x 10 to the 17th per sq cm is derived for the region, which agrees with those predictions made by Storey et al. (1981), and an apparent deficit of oxygen in the nebula is discussed.
    Schlagwort(e): ASTROPHYSICS
    Materialart: Astrophysical Journal; vol. 257
    Format: text
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    NASA TECHNICAL REPORTS
  • 20
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    Highly ejected J = 16 to 15 rotational transitions of CO at 162.8 mirons in the Orion cloud (1983)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The first observations of the J = 16 to J = 15, 162.8 microns transition of CO from an astronomical source are reported. Measurements were carried out on the Kleinmann-Low Nebula. The intensity observed is in good agreement with predictions from previous spectroscopic work carried out in the far infrared. The observation strengthens the previous claim that approximately 1.5 solar mass of molecular hydrogen is heated to a temperature above 750 K within the shocked region in the Nebula. Upper limits to he OH intensity in the F2 (2Pi 1/2) transitions J = 3/2 to J = 1/2 which fall into two groups centered respectively at 163.12 and 163.40 are presented.
    Schlagwort(e): ASTRONOMY
    Materialart: NASA-TM-84321 , A-9214 , NAS 1.15:84321
    Format: application/pdf
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