A detailed study of the high-mass clump interacting with the bubble N10

Abstract

We performed a detailed study of the high-mass clump interacting with bubble N10 based on the spectral lines 12CO(3–2), HCO+(4–3), N2H+(4–3) and CH3OH(7(0,7)–6(0,6)) and continuum emission data at 450 μm and 850 μm released by CADC and Spitzer. A blue-shifted optically thick line 12CO(3–2) seems to indicate that the outer envelope of the high-mass clump is still falling toward the center. Detection of CH3OH(7(0,7)–6(0,6)) suggests that a hot core has formed around YSO N10-7. The position–velocity diagram of N2H+(4–3) indicates that the cold dense core of the clump has not been destroyed by the star formation activities. The mass of N10-7 is about 27.44 M ⊙. The ratio HCO+(4–3)/N2H+(4–3) in the outer part of the clump is larger than that in the inner part of it. The reason may be that the CO abundance relative to N2H+(4–3) is increased in the outer part of the high-mass clump, and more N2H+(4–3) were converted into HCO+(4–3).