The circumstellar matter of type II intermediate luminosity optical transients(ILOTs)

作     者：Noam Soker 

作者机构：Department of PhysicsTechnionHaifa3200003Israel Guangdong Technion Israel Institute of TechnologyShantou 515069China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第5期

页      面：101-108页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 070401[理学-天体物理] 0825[工学-航空宇航科学与技术] 0704[理学-天文学] 

基　　金：This research was supported by a grant from the Israel Science Foundation(420/16 and 769/20) a grant from the Asher Space Research Fund at the Technion 

主　　题：binaries:close stars:jets stars:variables:general 

摘      要：I find that a≃0.1−1M⊙outflowing equatorial dusty disk(torus)that the binary system progenitor of an intermediate luminosity optical transient(ILOT)ejects several years to several months before and during the outburst can reduce the total emission to an equatorial observer by two orders of magnitude and shifts the emission to wavelengths of mainlyλ≳10μ*** is termed a type II ILOT(ILOT II).To reach this conclusion,I use calculations of type II active galactic nuclei and apply them to the equatorial ejecta(disk/torus)of ILOTs *** reduction in emission can last for tens of years after *** of the radiation escapes along the polar *** attenuation of the emission for wavelengths ofλ5μm can be more than three orders of magnitude,and the emission atλ\lessim2μm is *** that the binary system launches during the outburst can collide with polar CSM and emit radiation above the equatorial plane and dust in the polar outflow can reflect emission from the central ***,during the event itself the equatorial observer might detect an ILOT.I strengthen the previously suggested ILOT II scenario to the event N6946-BH1,where a red giant star disappeared in the visible.