Ⅰ. INTRODUCTION In 1983, Matsumoto et al. reported that they have detected a new IR background in the waveband 2-5 μm which has an approximately black body spectrum with a temperature ～1500 K. As is well known, the...Ⅰ. INTRODUCTION In 1983, Matsumoto et al. reported that they have detected a new IR background in the waveband 2-5 μm which has an approximately black body spectrum with a temperature ～1500 K. As is well known, the cosmic microwave background is the remainder of the hot Big Bang, then we must ask: Where does the IR background come from? In Ref. [2], B. J. Carr, et al. argued that either stars, or black展开更多
Searches for rapid variability in the flux from active galaxies have the promise of being a very powerful tool for understanding their emission mechanisms and the property of the compact nucleus of the active galaxy. ...Searches for rapid variability in the flux from active galaxies have the promise of being a very powerful tool for understanding their emission mechanisms and the property of the compact nucleus of the active galaxy. For the present, there is a general agreemeut that the X-ray emission of the active galaxy is originated from the accretion disk.展开更多
Ⅰ. INTRODUCTION BL Lac objects were the prototype of a new class of astrophysically interested objects with these peculiar characteristies: (ⅰ) Absence of emission lines in the core source;(ⅱ) rapid variability at ...Ⅰ. INTRODUCTION BL Lac objects were the prototype of a new class of astrophysically interested objects with these peculiar characteristies: (ⅰ) Absence of emission lines in the core source;(ⅱ) rapid variability at radio, IR and visual wavelengths; (ⅲ) non-thermal展开更多
文摘Ⅰ. INTRODUCTION In 1983, Matsumoto et al. reported that they have detected a new IR background in the waveband 2-5 μm which has an approximately black body spectrum with a temperature ～1500 K. As is well known, the cosmic microwave background is the remainder of the hot Big Bang, then we must ask: Where does the IR background come from? In Ref. [2], B. J. Carr, et al. argued that either stars, or black
文摘Searches for rapid variability in the flux from active galaxies have the promise of being a very powerful tool for understanding their emission mechanisms and the property of the compact nucleus of the active galaxy. For the present, there is a general agreemeut that the X-ray emission of the active galaxy is originated from the accretion disk.
文摘Ⅰ. INTRODUCTION BL Lac objects were the prototype of a new class of astrophysically interested objects with these peculiar characteristies: (ⅰ) Absence of emission lines in the core source;(ⅱ) rapid variability at radio, IR and visual wavelengths; (ⅲ) non-thermal
