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  1. No Access

    Chapter and Conference Paper

    PAHs as Probes of Photo-Dissociation Regions in M17 and the Orion Bar

    Polycyclic aromatic hydrocarbons (PAHs) have been proposed as the carrier of the well-known series of spectral features at 3.3, 3.4, 6.2, 7.7, 8.6, 11.3, and 12.7 µm. Here, we concentrate on the PAH features in t...

    G. C. Sloan, J. Bregman, A. S. B. Schultz… in The Role of Dust in the Formation of Stars (1996)

  2. No Access

    Article

    Jet-like features near the nucleus of Chiron

    CONSIDERED as a comet, the object 2060 Chiron is unusual in two respects: it exhibits outbursts at very large distances from the Sun1–3, and its nucleus is much larger than that of any other known comet4,5. It is...

    J. L. Elliot, C. B. Olkin, E. W. Dunham, C. H. Ford, D. K. Gilmore, D. Kurtz… in Nature (1995)

  3. No Access

    Article

    Nickel, argon and cobalt in the infrared spectrum of SN1987A: the core becomes visible

    Infrared spectra of supernova 1987A taken in April and November 1987 from the Kuiper Airborne Observatory (KAO) show two distinctly different stages in the evolution of the expanding gas shell. In April both t...

    D. M. Rank, P. A. Pinto, S. E. Woosley, J. D. Bregman, F. C. Wittebornt… in Nature (1988)

  4. No Access

    Chapter and Conference Paper

    Airborne and groundbased spectrophotometry of comet P/Halley from 5–13 micrometers

    Spectrophotometry from 5–10μm (Δλ/λ ≈ 0.02) of comet Halley was obtained from the Kuiper Airborne Observatory on 1985 December 12.1 and 1986 April 8.6 and 10.5, UT. 8–13 μm data were obtained on 17.2 December 198...

    J. D. Bregman, H. Campins, F. C. Witteborn, D. H. Wooden… in Exploration of Halley’s Comet (1988)

  5. No Access

    Chapter

    Quantum Electronic Techniques in Astrophysics: Present Developments and Future Prospects

    The rapid development of quantum electronic devices in the past decade has extended many conventional radio frequency techniques through the infrared region of the electromagnetic spectrum into the visible spe...

    D. M. Rank in Laser Spectroscopy (1974)

  6. No Access

    Chapter

    NH3 and H2O Emission in our Galaxy

    In 1968 NH3 molecules were discovered in gas clouds near the center of our Galaxy. The NH3 molecules showed emission lines in transitions arising from metastable J=K rotational states. NH3 has many transitions at...

    D. M. Rank in Highlights of Astronomy (1971)

  7. No Access

    Article

    Further Microwave Emission Lines and Clouds of Ammonia in our Galaxy

    Further NH3 emission has been found in the Sagittarius region, giving clues to the conditions in dust clouds.

    A. C. CHEUNG, D. M. RANK, C. H. TOWNES, W. J. WELCH in Nature (1969)

  8. No Access

    Article

    Detection of Water in Interstellar Regions by its Microwave Radiation

    A report of the detection of microwave radiation from water molecules in space, by the group which recently detected interstellar ammonia emission.

    A. C. CHEUNG, D. M. RANK, C. H. TOWNES, D. D. THORNTON, W. J. WELCH in Nature (1969)