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  • 1
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    Near-infrared images of MG 1131+0456 with the W. M. Keck telescope: Another dusty gravitational lens? (1994)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: Images of the gravitational lens system MG 1131+0456 taken with the near-infrared camera on the W. M. Keck telescope in the J and K(sub s) bands show that the infrared counterparts of the compact radio structure are exceedingly red, with J - K greater than 4.2 mag. The J image reveals only the lensing galaxy, while the K(sub s) image shows both the lens and the infrared counterparts of the compact radio components. After subtracting the lensing galaxy from the K(sub s) image, the position and orientation of the compact components agree with their radio counterparts. The broad-band spectrum and observed brightness of the lens suggest a giant galaxy at a redshift of approximately 0.75, while the color of the quasar images suggests significant extinction by dust in the lens. There is a significant excess of faint objects within 20 sec of MG 1131+0456. Depending on their mass and redshifts, these objects could complicate the lensing potential considerably.
    Keywords: ASTRONOMY
    Type: Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X); 420; 1; p. L9-L12
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  • 2
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    Infrared observations in space astronomy (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Observations of infrared radiation from stars and extragalactic objects in space astronomy
    Keywords: SPACE SCIENCES
    Type: NASA, WASHINGTON OPT. TELESCOPE TECHNOL. 1970; P 25-32
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  • 3
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    Infrared radiometry experiment (1973)
    In:  CASI
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    Publication Date: 2005-11-30
    Description: The objectives of the experiment are discussed. These objectives were: (1) measure the thermophysical properties of the Martian surface on a global scale; (2) isolate large-scale irregularities in the global picture; and (3) isolate small-scale hot or cold spots on the surface.
    Keywords: SPACE SCIENCES
    Type: Mariner Mars 1971 Proj., Vol. 5; p 37-40
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  • 4
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    The Atmospheres of Mars and Venus (1961)
    In:  CASI
    Details
    Publication Date: 2008-08-25
    Description: Atmospheres of mars and venus
    Keywords: PROPULSION SYSTEMS
    Type: NAS-NRC-944
    Format: text
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  • 5
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    Preliminary report on infrared radiometric measurements from Mariner 9 (1973)
    In:  CASI
    Details
    Publication Date: 2006-03-27
    Description: The results of the preliminary analysis of the Mariner 9 radiometer data are: (1) Gross thermal characteristics of Mars agreed qualitatively with those observed in 1969: (2) a dust storm changed the thermal picture of Mars radically with average dayside temperatures lower by about 20K than without the dust storm; (3) over large-scale physiographic visual features, no univocal correlation between albedo and thermal inertia seems to exist, and (4) surface particle sizes derived from observed thermal inertias vary between 0.006 cm and 0.5 cm.
    Keywords: SPACE SCIENCES
    Type: JPL Mariner Mars 1971 Proj., Vol. 4; p 315-338
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  • 6
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    The properties of infrared galaxies in the local universe (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The 60-micron selected IRAS Bright Galaxy Sample is used as a starting point to derive additional complete flux-limited samples of extragalactic objects at 12, 25, and 100 microns. With these complete samples the luminosity functions at all IRAS wavelengths are derived for the local universe. These luminosity functions are used to determine the infrared emission of the local universe. The maximum in the energy output of galaxies occurs at 100 microns. The infrared emission of galaxies at 12 and 25 micron represents about 30 percent of the total infrared luminosity in the local universe. The mean infrared colors of infrared selected galaxies vary systematically with infrared luminosity; the ratio S sub nu (60 microns)/S sub nu(100 microns) increases and S sub nu(12 microns)/S sub nu(25 microns) decreases with increasing infrared luminosity.
    Keywords: ASTROPHYSICS
    Type: Astronomical Journal (ISSN 0004-6256); 101; 354-361
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  • 7
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    IRAS observations of R Coronae Borealis - Detection and study of a fossil shell (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: IRAS observations of the extreme hydrogen-deficient supergiant R CrB are presented and discussed. The star is surrounded by an enormous cool dust cloud which is tentatively identified as a fossil remnant of the hydrogen-rich envelope of the star. The angular extent of the emission corresponds to a linear extent of 8 pc, 20 times larger than the largest previously known shell around a late-type star. The radiating material is distributed very symmetrically over a wide range of radial distances from the star. The dust temperature is nearly constant throughout the extended shell. The total mass in the shell is about 0.3 solar mass. The ejection process appears to have occurred in a spherically symmetric fashion with a nearly constant mass loss rate and expansion velocity over a period of about 150,000 yr, terminating about 26,000 yr ago.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 310; 842-852
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  • 8
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    IRAS observations of radio galaxies (1988)
    In:  Other Sources
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    Publication Date: 2011-08-19
    Description: IRAS measurements at 25, 60, and 100 microns have been used to analyze the far-infrared properties of radio galaxies. Fifty-eight of the 131 objects surveyed were detected at the level of better than 300 mJy at 60 microns. The most powerful radio galaxies are strong emitters in the far infrared. Large infrared emission is shown to be correlated with the presence of strong emission lines in the optical spectra. The infrared colors of the strong radio galaxies are similar to those of Markarian Seyferts. The results are shown to be consistent with recent results implying that the host galaxies of radio sources are not normal giant ellipticals and that galaxy-galaxy interactions may power luminous radio sources. Finally, some similarities between powerful radio galaxies and powerful infrared galaxies are noted and briefly discussed.
    Keywords: ASTRONOMY
    Type: Astronomical Journal (ISSN 0004-6256); 95; 26-36
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  • 9
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    The IRAS Bright Galaxy Sample. IV - Complete IRAS observations (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Total flux densities, peak flux densities, and spatial extents at 12, 25, 60, and 100 microns are presented for the 330 sources in the IRAS Bright Galaxy Sample. The flux density ratios S sub nu (60 microns)/S sub nu (100 microns) and S sub nu (12 microns)/S sub n (25 microns) are found to correlate with both the infrared luminosity and the ratio of IR to visible flux. The relation between these two flux density ratios is shown to follow that found previously, with different slopes appearing for the warmer and colder galaxies in the sample. The results suggest that single photon heating of small grains (often the dominant source of 12 and 25 micron radiation from galaxies) significantly affects the emission of some galaxies at 60 microns, and that optical depth effects may alter the emergent radiation at 12 and 25 microns.
    Keywords: ASTROPHYSICS
    Type: Astronomical Journal (ISSN 0004-6256); 98; 766-797
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  • 10
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    The optical/infrared counterpart(s) of IRAS 18333-2357 (1989)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Observations of the potential optical counterparts of the unusual source IRAS 18333-2357 are reported. There are three distinct optical objects located within roughly 2 arcsec of the IR source: a red star, a very blue star, and an extended emission line nebulosity. IRAS 18333-2357 indeed appears to be physically associated with the Galactic globular cluster M22, and while it probably should be considered a PN, its very small nebular mass and extreme abundance anomalies are very unusual among known PNe. IRAS 18333-2357 does not appear to be at an early stage of PN evolution, but instead may be in a late stage. The lack of an associated radio or H-alpha source is the result of abundance anomalies in the source.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 338; 862-874
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