173 citations · 314 across the 12 of their papers we have counts for
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Water vapour masers in long-period variable stars III. Mira variables U Her and RR Aql
A. Winnberg, J. Brand, D. Engels
Within the 'Medicina/Effelsberg H2O maser monitoring program' we observed U Her and RR Aql at 22-GHz for about two decades between 1990 and 2011, with a gap between 1997 and 2000 i…
Patterns in water maser emission of evolved stars on the timescale of decades
Jan Brand, Dieter Engels, Anders Winnberg
We present our past and current long-term monitoring program of water masers in the circumstellar envelopes of evolved stars, augmented by occasional interferometric observations.…
Water vapour masers in long-period variable stars II. The semi-regular variables R Crt and RT Vir
J. Brand, D. Engels, A. Winnberg
Within the 'Medicina/Effelsberg H2O maser monitoring program' we have observed the maser emission of R Crt and RT Vir for more than two decades. To get insight in the distribution…
Galactocentric variation of the gas-to-dust ratio and its relation with metallicity
A. Giannetti, S. Leurini, C. Koenig +6
(Abridged) Context: The assumption of a gas-to-dust mass ratio (γ) is a common approach to estimate the basic properties of molecular clouds, such as total mass and column density…
Molecular gas and stars in the translucent cloud MBM 18 (LDN 1569)
J. Brand, J. G. A. Wouterloot, L. Magnani
Seven of ten candidate H-alpha emission-line stars found in an objective grism survey of a 1 square degree region in MBM 18, were observed spectroscopically. Four of these have wea…
Temperature and kinematics of protoclusters with intermediate and high-mass stars: the case of IRAS 05345+3157
F. Fontani, P. Caselli, Q. Zhang +3
We have mapped at small spatial scales the temperature and the velocity field in the protocluster associated with IRAS 05345+3157, which contains both intermediate-/high-mass proto…