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Evolution of the symbiotic binary system AG Pegasi - The slowest classical nova eruption ever recordedWe present an analysis of new and existing photometric and spectroscopic observations of the ongoing eruption in the symbiotic star AG Pegasi, showing that this binary has evolved considerably since the turn of the century. Recent dramatic changes in both the UV continuum and the wind from the hot component allow a more detailed analysis than in previous papers. AG Peg is composed of a normal M3 giant and a hot, compact star embedded in a dense, ionized nebula. The hot component powers the activity observed in this system, including a dense wind and a photoionized region within the outer atmosphere of the red giant. The hot component contracted in radius at roughly constant luminosity from 1850 to 1985. Its bolometric luminosity declined by a factor of about 4 during the past 5 yr. Both the mass loss rate from the hot component and the emission activity decreased in step with the hot component's total luminosity, while photospheric radiation from the red giant companion remained essentially constant.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Kenyon, Scott J. (Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Mikolajewska, Joanna (Polish Academy of Sciences, Astronomical Center Warsaw, Poland)
Mikolajewski, Maciej (Torun Univ. Poland)
Polidan, Ronald S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Slovak, Mark H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
October 1, 1993
Publication Information
Publication: Astronomical Journal
Volume: 106
Issue: 4
ISSN: 0004-6256
Subject Category
Funding Number(s)
Distribution Limits