000007661 001__ 7661
000007661 005__ 20251226112323.0
000007661 037__ $$aSCART-2025-0152
000007661 100__ $$aDanilovich, T.
000007661 245__ $$aThe salty emission of the intermediate-mass AGB star OH 30.1-0.7
000007661 260__ $$c2025
000007661 520__ $$aWe analyse continuum and molecular emission, observed with Atacama Large Millimetre/submillimetre Array, from the dust-enshrouded intermediate-mass asymptotic giant branch (AGB) star OH 30.1−0.7.  We find a secondary peak in the continuum maps, ‘feature B’, separated by 4.6 arcsec from the AGB star , which corresponds to a projected separation of 1.8 × 104 au, placing a lower limit on the physical separation. This feature is most likely composed of cold dust and is likely to be ejecta associated with the AGB star , though we cannot rule out that it is a background object. The molecular emission we detect includes lines of CO, SiS, CS, SO2 , NS, NaCl, and KCl. We find that the NS emission is off centre and arranged along an axis perpendicular to the direction of feature B, indicative of a UV-emitting binary companion (e.g. a G-type main sequence star or hotter), perhaps on an eccentric orbit, contributing to its formation. Howe ver, the NaCl and KCl emission constrain the nature of that companion to not be hotter than a late B-type main-sequence star. We find relatively warm emission arising from the inner wind and detect several vibrationally excited lines of SiS (nu = 1), NaCl (up to nu = 4), and KCl (up to nu = 2), and emission from low-energy levels in the mid to outer envelope, as traced by SO2. The CO emission is abruptly truncated around 3.5 arcsec or 14 000 au from the continuum peak, suggesting that mass loss at a high rate may have commenced as little as 2800 yr ago.
000007661 594__ $$aNO
000007661 6531_ $$astars: AGB and post-AGB
000007661 6531_ $$acircumstellar matter 
000007661 6531_ $$astars: individual: OH 30.1−0.7.
000007661 700__ $$aRichards, A.M.S.
000007661 700__ $$aVan de Sande, M. 
000007661 700__ $$aGottlieb, C.A.
000007661 700__ $$aMillar, T.J.
000007661 700__ $$aKarakas, A.I. 
000007661 700__ $$aM\"uller, H.S.P.
000007661 700__ $$aJusttanont, K.
000007661 700__ $$aPlane, J.M.C.
000007661 700__ $$aEtoka, S. 
000007661 700__ $$aWallstr\"om, S.H.J
000007661 700__ $$aDecin, L.
000007661 700__ $$aEngels, D.
000007661 700__ $$aGroenewegen, M.A.T.
000007661 700__ $$aKerschbaum, F.
000007661 700__ $$aKhouri, T.
000007661 700__ $$ade Koter, A.
000007661 700__ $$aOlofsson, H.
000007661 700__ $$aPaladini, C.
000007661 700__ $$aStancliffe, R.J.
000007661 773__ $$c684-713$$pMNRAS$$v536$$y2025
000007661 8560_ $$fmartin.groenewegen@ksb-orb.be
000007661 8564_ $$s41429761$$uhttp://publi2-as.oma.be/record/7661/files/DanilovichRichards_ea_2025MN536_684_SaltyEmissionOH30.1.pdf
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000007661 905__ $$apublished in
000007661 980__ $$aREFERD