Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.8004o&link_type=abstract
American Astronomical Society, AAS Meeting #211, #80.04; Bulletin of the American Astronomical Society, Vol. 39, p.871
Astronomy and Astrophysics
Astronomy
Scientific paper
Luminous Blue Variables (LBVs) are characterized by semi-periodic episodes of outburst. The cause of these outbursts has thus far been a mystery. One possible explanation is that they are initiated by pulsations in the atmosphere caused by a buildup of luminosity at temperatures near the so-called "iron bump" ( 200,000 K). Due to a lag in the onset of convection in the presence of these pulsations, this luminosity can build until it exceeds the Eddington limit locally, driving some mass from the star. We present results from a parameter study focusing on the conditions necessary to trigger normal AG Car-like (as opposed to extreme η Carinae-like) outbursts. The implications for mass loss will also be discussed.
This work was performed under the auspices of the U. S. Department of Energy by the Los Alamos National Security (LANS), LLC under contract No. DE-AC52-06NA25396.
Guzik Joyce Ann
Onifer Andrew J.
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