Results 11 to 20 of about 20,180 (51)

Modelling and observations of molecules in discs around young stars [PDF]

, 2013
This thesis contains a study of molecules within circumstellar discs around young stars. Firstly, the chemistry of a disc around a young, Class 0 protostar is modelled.
Ilee, John David
core   +6 more sources

Circular polarization of circumstellar water masers around S Per [PDF]

, 2001
We present the first circular polarization measurements of circumstellar H2O masers. Previously the magnetic field in circumstellar envelopes has been estimated using polarization observations of SiO and OH masers.
Vlemmings, W.H.T., P. J. Diamond, H. J. van Langevelde, Diamond, P.J., W. Vlemmings, Langevelde, H.J. van   +5 more
core   +1 more source

SiO masers in Mira variables at a single stellar phase

, 1996
A hydrodynamic pulsation model for long-period M-type Mira variables is used to estimate the physical conditions of number density, temperature and velocity field in the circumstellar envelope of a model star of 1 M⊙, 332-d period, surface temperature ...
Humphreys, E. M L, Field, D., Gray, MD, Bowen, G, Yates, JA, Yates, J. A., Bowen, G., Diamond, P. J., Diamond, PJ, Field, D, Humphreys, EML, Gray, M. D.   +11 more
core   +10 more sources

VLBI observations of H2O and CH3OH masers in two high-mass YSOs [PDF]

, 2007
We have conducted phase-reference VLBI observations of H2O and CH3OH masers toward two high-mass star forming regions, Sh 2-255 IR and AFGL 5142. In Sh 2-255 infrared water masers are aligned along a direction close to the orientation of a large scale H2
MOSCADELLI, Luca, SANNA, ALBERTO, CESARONI, Riccardo, Minier, V., Goddi, C.   +4 more
core   +1 more source

Microlensing of circumstellar envelopes: II. emission lines from radial and azimuthal flow during fold caustic crossings [PDF]

, 2003
This paper examines the line profile evolution due to bulk motion in circumstellar envelopes during microlensing fold caustic crossing events. These events have recently been shown to be a sensitive probe of stellar surface brightness profiles, thus ...
Bryce, H.M., Hendry, M.A., Ignace, R., H. M. Bryce, M. A. Hendry, R. Ignace   +5 more
core   +1 more source

Microlensing of circumstellar envelopes III. Line profiles from stellar winds in homologous expansion [PDF]

, 2006
This paper examines line profile evolution due to the linear expansion of circumstellar material obsverved during a microlensing event. This work extends our previous papers on emission line profile evolution from radial and azimuthal flow during point ...
Bryce, H.M., Hendry, M., Hendry, M.A., Bryce, H., Ignace, R., H. M. Bryce, Ignace, Richard, M. A. Hendry, R. Ignace   +8 more
core   +1 more source

Circular polarization of water masers in the circumstellar envelopes of late type stars [PDF]

, 2002
We present circular polarization measurements of circumstellar H2O masers. The magnetic fields in circumstellar envelopes are generally examined by polarization observations of SiO and OH masers.
W. H. T. Vlemmings, Vlemmings, W.H.T., Van Langevelde, H. J., P. J. Diamond, Diamond, P. J., H. J. van Langevelde, Diamond, P.J., Vlemmings, W. H T, Langevelde, H.J. van   +8 more
core   +1 more source

Circumstellar masers in the Magellanic Clouds

, 2001
Results are presented of a search for 22 GHz H2O $6_{16}\rightarrow5_{23}$, 43 GHz SiO$_{v=1}(J=1\rightarrow0)$, 86 GHz SiO$_{v=1}(J=2\rightarrow1)$ and 129 GHz SiO$_{v=1}(J=3\rightarrow2)$ maser emission from bright IRAS point sources in the Small and ...
L.-Å. Nyman, A. A. Zijlstra, J. Th. van Loon, V. Bujarrabal   +3 more
core   +1 more source

A database of circumstellar OH masers

, 2015
We present a new database of circumstellar OH masers at 1612, 1665, and 1667 MHz in the Milky Way galaxy. The database (version 2.4) contains 13 655 observations and 2341 different stars detected in at least one transition.
D. Engels, F. Bunzel
core   +1 more source

A Study of Hydroxyl Masers in the Circumstellar Envelopes of Long Period Variable Stars [PDF]

, 1980
The 18 cm wavelength maser radiation from long period variable (LPV) stars is emitted by hydroxyl (OH) molecules in the expanding circumstellar envelopes.
Cimerman, Menachem
core   +1 more source