First Detection of 13CH in the Interstellar Medium

The first detection of ¹³ CH in the interstellar medium. SOFIA absorption spectrum of ¹³ CH corresponding rotational transition near 2 THz in the direction of SgrB2(M) superposed over a composite infrared image of the Sgr B complex. Data from SOFIA taken at 25 and 37 µm, shown in blue and green, is combined with data from the Herschel Space Observatory, shown in red (70 µm), and the Spitzer Space Telescope, shown in white (8 µm).

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