Results 21 to 30 of about 5,254,583 (200)

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

The Polarized Water Maser in Orion [PDF]

Symposium - International Astronomical Union, 1992
We present the results of 12 years of observations of the 8 km s−1 water maser in Orion. Four large flares in the flux density were observed, as well as variability in the degree and angle of polarization. The profile of the line is also variable, indicating the superposition of several sources.
Z. Abraham, J. W. S. Vilas Boas
openaire   +1 more source

Water masers in the Kronian system [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractThe presence of water has been considered for a long time as a key condition for life in planetary environments. The Cassini mission discovered water vapour in the Kronian system by detecting absorption of UV emission from a background star (Hansen et al. 2006).
Pogrebenko, Sergei V., Gurvits, Leonid I., Elitzur, Moshe, Cosmovici, Cristiano B., Avruch, Ian M., Pluchino, Salvatore, Montebugnoli, Stelio, Salerno, Emma, Maccaferri, Giuseppe, Mujunen, Ari, Ritakari, Jouko, Molera, Guifre, Wagner, Jan, Uunila, Minttu, Cimo, Giuseppe, Schilliro, Francesco, Bartolini, Marco, Fernández, J. A., Lazzaro, D., Prialnik, D., Schulz, R.   +20 more
openaire   +3 more sources

Water Masers in Orion

The Astrophysical Journal, 1998
Measurements of the 616 → 523 line of H2O at 1.3 cm in the Orion region of star formation are reported. With a spatial resolution of ≈ 01, H2O maser emission was detected in two regions: Orion BN/KL and Orion S. The well-known masers in the BN/KL region are distributed in a 30'' by 30'' area. The "shell" masers, within the BN/KL region, are distributed
R. A. Gaume, T. L. Wilson, F. J. Vrba, K. J. Johnston, J. Schmid‐Burgk   +4 more
openaire   +1 more source

Interacting masers and the extreme brightness of astrophysical water masers

The Astrophysical Journal, 1989
Extreme surface brightnesses have long been reported for water masers which are well beyond what is found in self-consistent, theoretical investigations of these masers. The transport of maser radiation is calculated when two masers, having the properties inferred for the numerous weaker masers and separated by distances characteristic of the molecular
Shuji Deguchi, William D. Watson
openaire   +1 more source

Water masers in the Saturnian system [PDF]

Astronomy & Astrophysics, 2009
Context. The presence of water has long been seen as a key condition for life in planetary environments. The Cassini spacecraft discovered water vapour in the Saturnian system by detecting absorption of UV emission from a background star. Investigating other possible manifestations of water is essential, one of which, provided physical conditions are ...
S. V. Pogrebenko, L. I. Gurvits, M. Elitzur, C. B. Cosmovici, I. M. Avruch, S. Montebugnoli, E. Salerno, S. Pluchino, G. Maccaferri, A. Mujunen, J. Ritakari, J. Wagner, G. Molera, M. Uunila   +13 more
openaire   +1 more source

Discovery of SiO Masers in the "Water Fountain" Source IRAS 16552-3050 [PDF]

, 2022
In this paper, we report new detections of SiO v = 1 and v = 2 J = 1 -> 0 masers in the "water fountain" source IRAS 16552-3050, which was observed with the Nobeyama 45 m telescope during 2021 March-April.
Tafoya, Daniel, Burns, R. A., Hamae, Y., Orosz, G.,, Tafoya, D., Amada, K., Nakashima, K.,, Amada, K.,, Hamae, Y.,, Nakashima, K., Gomez, J. F., Orosz, G., Imai, H.,, Burns, R. A.,, Uscanga, L., Shum, K. Y., Shum, K. Y.,, Imai, H., Uscanga, L.,, Gomez, J. F.,, Gómez, José F., Tafoya, Daniel,, H. Imai, Gómez Rivero, José Francisco, Y. Hamae, K. Amada, K. Y. Shum, R. A. Burns, J. F. Gómez, D. Tafoya, L. Uscanga, K. Nakashima, G. Orosz   +32 more
core   +1 more source

Supersonic Water Masers in 30 Doradus

The Astrophysical Journal, 2001
We report on extremely high velocity molecular gas, up to -80 km/s relative to the ambient medium, in the giant star-formation complex 30 Doradus in the Large Magellanic Cloud (LMC), as observed in new 22 GHz H2O maser emission spectra obtained with the Mopra radio telescope.
van Loon, Jacco Th., Zijlstra, Albert A.
openaire   +2 more sources

A model for extremely powerful extragalactic water masers [PDF]

, 1988
The reasons for the differences between extremely powerful extragalatic water masers (EPEWMs) and strong Galactic H/sub 2/O masers are discussed. This model quite successfully explains many important characteristics of EPEWMs; the rapid time variations ...
Alcock, C., Wu, Ying-Cheng
core   +1 more source

Photometric Study of Galaxies with Water and without Detected Water Masers in Different Spectal Ranges [PDF]

, 2020
Studies of water masers in other galaxies play an important role in various fields of astronomy, but the probability of detection of these masers is extremely low.
Volkov, K. V., Parfenov, S. Yu., Волков, К. В., Smirnova, K. I., Парфёнов, С. Ю., Смирнова, К. И.   +5 more
core   +1 more source