IAU Symposium 170 Electronic Poster Presentations

CO: Twenty-five Years of Millimeter-wave Spectroscopy

Poster Presentations

29 May - 2 June 1995
Tucson, Arizona

Co-Sponsored by National Radio Astronomy Observatory -- Tucson, The Submillimeter Telescope Observatory, IAU Commissions 28, 33, 34, & 40, and URSI.

IAU Symposium 170, "CO: Twenty Five Years of Millimeter Wave Spectroscopy," was organized to commemorate the discovery in 1970 of interstellar carbon monoxide. The 2.6 mm wavelength emission line of this molecule was first detected by R. W. Wilson, K. B. Jefferts, and A. A. Penzias of Bell Labs with the NRAO millimeter telescope on Kitt Peak, near Tucson. [Wilson and Penzias received the 1978 Nobel Prize in Physics for their 1965 discovery of the cosmic background radiation.] The discovery of interstellar CO lead to studies that revolutionized our understanding of the phases of the interstellar medium, the initial and final phases of stellar evolution, the chemistry of the dense interstellar matter, the structure of the Milky Way galaxy, and the content and structure of other galaxies. Since then a number of powerful telescopes for the millimeter and, more recently, the submillimeter region have contributed to an enormous growth in millimeter radio astronomy, which is now one of the most active areas of astrophysical research.

The Symposium drew about 225 researchers from 19 countries to Tucson, among them several of the pioneers in this field. A large group of young astronomers also participated in the presentations and discussions.

The core of the scientific program consisted of thirty invited review talks on all areas of millimeter astronomy. These presentations covered molecular clouds and the interstellar medium of the Milky Way, interstellar chemistry, cloud cores and star formation, CO in the Galactic center, CO in other galaxies, particularly in starburst galaxies and in galactic nuclei, CO in the Solar System, and circumstellar envelopes. Forty three oral contributions complemented the reviews and more than 150 posters presented a wealth of additional material. The posters were on display throughout the entire duration of the Symposium.

Special evening sessions were devoted to instrumentation and to a panel discussion on the "X-factor," the ratio of CO line intensity to molecular hydrogen column density. In addition the URSI/IAU Joint Working Group on a Large Millimeter Array and the Large Millimeter Telescope Project held ancillary public sessions on May 28.

The highlight of the Symposium banquet was a delightful account by Robert Wilson of the discovery observations of CO, illustrated with historical slides. To commemorate the occasion, Wilson, Jefferts, and Penzias were awarded plaques bearing small sections of the original surface of the 36 ft telescope.

The Symposium proceedings will be published by Kluwer in the IAU series. Since the size of this volume is limited, the space available for poster abstracts is quite restricted. Because so much interesting material was presented in the posters, however, the Symposium organizers have arranged to make expanded descriptions of the posters available over the Internet and as a companion printed volume with support from NRAO.

By all accounts, the Symposium was a great success: the contributions were uniformly interesting and well presented, the discussion was lively, and the audience remained attentive late into the evenings. With the growing observational potential of (sub)millimeter astronomy, this part of astronomy can look forward to great activity and exciting results over the next 25 years.

The following poster presentations are listed alphabetically by first author. They are all postscript files. Please address comments or questions about this compilation to Jeff Mangum.

CO in the Atmospheres of Pluto and Triton P. Barnes (Haystack Observatory)

Molecular Isotopic Observations of Chemical Evolution in Dense Cores P. Barnes (Haystack Observatory) and P. Myers (Center for Astrophysics)

Multi-Transition Submillimeter CO spectra of Ultra-Luminous IRAS Galaxies D. J. Benford, M. S. Yun, T. R. Hunter, P. M. Bryant, and T. G. Phillips (California Institute of Technology)

CO Observations of HII Galaxies E. Brinks (NRAO) and C. L. Taylor (NRAO and University of Minnesota)

DR 21: Highlights Over 25 Years H. R. Dickel, D. A. Roberts (University of Illinois), and W. M. Goss (NRAO)

Multitransition Observations of Molecular Clouds in the Far Outer Galaxy S.W. Digel (NASA/GSFC, Hughes STX), E. de Geus (Caltech), C. Henkel (MPIfR Bonn), S. Huttemeister, and P. Thaddeus (Center for Astrophysics)

The Bipolar Outflow NGC2264G Michel Fich (University of Waterloo) and Charles J. Lada (Smithsonian Astrophysical Observatory)

Dynamical Models of Circumstellar Dust Shells Around Long-Period Variables: The Effect of Multiperiodicity A. J. Fleischer, J. M. Winters, E. Sedlmayr (Technische Universitaet Berlin), and A. Gauger (Los Alamos National Laboratory)

The Y-Factor Derived from a Panel Discussion on the X-Factor D. Gumby (Institute for Advanced Brain Surgery & Creative Flower Arranging)

Isotopic CO in NGC 253 A. Harrison (University of Edinburgh)

The CO Emission of Ring Galaxies C. Horellou (Onsala Space Observatory)

CO Twin Peaks and Centrally Concentrated H2 Emission at the Center of NGC 1275 M. Y. Inoue, R. Kawabe (Nobeyama Radio Observatory), S. Kameno (National Astronomical Observatory, Tokyo), M. Tanaka, and Tetsuo Hasegawa (Institute for Astronomy, U. Tokyo)

Mass Loss from OH26.5+0.6 K. Justtanont (NASA/Ames Research Center), Skinner, C. J. (STScI), A. G. G. M. Tielens (NASA/Ames Research Center), M. Meixner (University of Illinois), F Baas (Leiden Observatory and JAC)

CO and OH Absorption Toward the Low-Latitude Radio Source 2023+336 H. Kobulnicky (University of Minnesota) and Rachel L. Akeson (Caltech)

The HCN(J=1-0) and CO(J=1-0) Aperture Synthesis Observations of M51: Dense Obscuring Materials Around a Low Luminosity AGN K. Kohno (University of Tokyo and Nobeyama Radio Observatory), R. Kawabe, T. Tosaki, and S. K. Okumura (Nobeyama Radio Observatory)

Structure and Excitation Conditions of the Southern Part of the Orion B Molecular Cloud: A CO Multi-Line Study C. Kramer (IRAM, Spain)

Vibration-Rotation CO Lines in Intermediate Population Miras T. Lebzelter (University of Vienna) and K. Hinkle (Kitt Peak National Observatory, NOAO)

The Variation of the X-Factor in Two Translucent Clouds L. Magnani (University of Georgia), J. Onello (State University of New York, Cortland), D. Hartmann, and P. Thaddeus (Harvard-Smithsonian/ Center for Astrophysics)

Properties of High Altitude Molecular Clouds S. Malhotra (Princeton University)

The Dense Gas Structure and Kinetic Temperature in the Serpens Molecular Cloud J. G. Mangum (Submillimeter Telescope Observatory), W. B. Latter (NASA/Ames), and J. P. McMullin (Submillimeter Telescope Observatory)

BIMA Array CS J=2->1 Observations of Sagittarius B2 D. M. Mehringer (University of Illinois)

Stars and Protostars in NGC 2024 D. M. Mehringer, H. R. Dickel, and T. L. Wilson

The Kinematics of the Molecular Gas in the Edge-On Galaxy NGC 4565 N. Neininger (IRAM, Grenoble)

Balloon Observations of the 557 GHz Line of Water Vapour G. Olofsson, L. Nordh (Stockholm Observatory), J. Tauber, G. Pilbratt (ESA), U. Frisk (Swedish Space Corporation)

Mass Calibration and Hydrodynamics in the Cepheus Flare Molecular Cloud G. Remy (EUROPA, Universite Paris) and I. A. Grenier (Universite Paris and DAPNIA/Service d'Astrophysique)

A Direct Comparison of Shocked CO and H2 Emission Lines in Orion M. J. Richter, J. R. Graham (University of California, Berkeley) and G. S. Wright (Joint Astronomy Centre)

High Resolution CO Observations of the Starburst Nucleus of M82 J. Shen (University of Illinois)

Circumstellar Molecular Gas of PV Cephei K. Stapelfeldt (Jet Propulsion Laboratory)

Multiple Winds from the Carbon Star V Hydra: Studying Time-Variations Using High-Resolution Spectroscopy of the 4.6 Micron CO Lines B. Sugerman (Occidental College), R. Sahai (JPL/Caltech), and K. Hinkle (KPNO/NOAO)

The Smoothness of Line Profiles: A Useful Diagnostic of Clump Properties J. A. Tauber, M. Fridlund, and G. Pilbratt (European Space Agency)

The Effects of the Orion OB Association on the Local ISM D. S. Theil (University of Colorado)

The Distribution of Cold Gas in the Flocculent Spiral NGC 5055 M. Thornley (University of Maryland)

Molecular Abundances and the Gas-to-Dust Ratio in the T Tau Circumstellar Matter H. van Langevelde, E. F. van Dishoeck, and G. A. Blake (Joint Institute for VLBI in Europe)

CO Observations, CCD-Imaging and Spectroscopy of the Compact Group of Galaxies Hickson 96 L. Verdes-Montenegro (Instituto de Astrofisica de Andalucia)

CO Emission from QSO Absorption Line Systems C.E. Walker, J. Bechtold, J.H. Black (Steward Observatory, U. Arizona)

Shocked Vibration - Rotation CO and H2 in NGC2071 IRS1 D. M. Walther and T. R. Geballe (Joint Astronomy Centre/UKIRT)

Dynamical Models of Circumstellar Dust Shells Around Long-Period Variables: Spectrum, Lightcurves, Intensity Profiles, and Visibilities of IRC +10216 J. M. Winters, A. J. Fleischer (Institut fuer Astronomie & Astrophysik, TU Berlin), A. Gauger (Los Alamos National Laboratory), and E. Sedlmayr (Institut fuer Astronomie & Astrophysik, TU Berlin)

The Monoceros OB1 Dark Cloud: A Comparison of 13CO, C18O, and CS Observations of Outflow Regions G. A. Wolf-Chase (NASA Ames Research Center)

Jeff Mangum