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Probing the molecular interstellar medium of M82 with<i>Herschel</i>-SPIRE spectroscopy

Probing the molecular interstellar medium of M82 with<i>Herschel</i>-SPIRE spectroscopy

We present the observations of the starburst galaxy M82 taken with the <i>Herschel<i/> SPIRE Fourier-transform spectrometer. The spectrum (194–671 <i>μ<i/>m) shows a prominent CO rotational ladder from <i>J<i/> = 4–3 to 13–12 emitted by the central region of M82. The fundamental properties of the gas are well constrained by the …