Session 82. Circumstellar Material, Planetary Nebulae and Extra-Solar Planets

Oral, Friday, January 8, 1999, 10:00-11:30am, Room 8 (A,B,C)

82.01 Possible Periodicity of the Blue/Red Peak Ratio for the Masing Hydrogen Lines in MWC349

S. Moringello (Vassar College \& Maria Mitchell Obs.), M. Gordon (NRAO), V. Strelnitski (Maria Mitchell Obs.)

82.02 Infrared Interferometry and Spectroscopy of Circumstellar Envelopes

John D. Monnier, Peter G. Tuthill, Charles H. Townes, Manfred Bester, William C. Danchi, David Hale, Everett Lipman (UC Berkeley)

82.03 The Transience of the 1612 MHz Emission Phase of OH/IR Stars

B. M. Lewis (Arecibo Observatory)

82.04 Two Types of Proto-Planetary Nebulae?

M. Meixner, T. Ueta (University of Illinois), M. Bobrowsky (Orbital Sciences Corporation)

82.05 The Extent and Cause of the Pre-White Dwarf Instability Strip, with Applications to Neutrino Astrophysics

M.S. O'Brien (Grinnell College, Grinnell, Iowa)

82.06 The Expansion Parallax Distance to NGC 6543

A.R. Hajian (USNO), T.L. Klayton (Thomas Jefferson HS for Science and Technology), D. Reed, B. Balick (Univ. of Washington)

82.07 Statistical Characteristics of Low-Mass Companions (Extrasolar Planets)

W. D. Heacox (University of Hawaii at Hilo)