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A Single Circumbinary Disk In The Hd 98800 Quadruple System, D. W. Koerner, Eric L.N. Jensen, K. L. Cruz, T. B. Guild, K. Gultekin

Physics & Astronomy Faculty Works

We present subarcsecond thermal infrared imaging of HD 98800, a young quadruple system composed of a pair of low-mass spectroscopic binaries separated by 0".8 (38 AU), each with a K-dwarf primary. Images at wavelengths ranging from 5 to 24.5 mu m show unequivocally that the optically fainter binary, HD 98800B, is the sole source of a comparatively large infrared excess on which a silicate emission feature is superposed. The excess is detected only at wavelengths of 7.9 mu m and longer, peaks at 25 mu m, and has a best-fit blackbody temperature of 150 K, indicating that most of the …