Results 31 to 40 of about 20,180 (51)

Linear polarization of hydroxyl masers in circumstellar envelope outer regions

, 2012
International audienceA recent polarimetric survey of OH masers in a large sample of AGB and post-AGB stars revealed widespread occurrence of polarized features. We made a statistical analysis of the polarization properties of this large data set.
Gérard, Éric, Wolak, P., Szymczak, M.
core   +1 more source

CH3OH Thermal Lines Traces 6.7 GHz CH3OH Maser Variation of High-mass Protostar G353.273+0.641

The Astrophysical Journal
This study reports an analysis of the 6.7 GHz CH _3 OH maser in the high-mass protostar G353.273+0.641 (G353), utilizing data from the Tianma Radio Telescope.
Shi-Min Song, Xi Chen, Sheng-Yuan Liu, Jun-Ting Liu   +3 more
doaj   +1 more source

Long-term Simultaneous Monitoring Observations of SiO and H2O Masers toward the Mira Variable WX Serpentis

The Astrophysical Journal Supplement Series
We present the results from long-term simultaneous monitoring observations of SiO and H _2 O masers toward the Mira variable star WX Serpentis. This study has been conducted with 21 m single-dish radio telescopes of the Korean VLBI Network from 2009 June
Jang-Ho Lim, Jaeheon Kim, Se-Hyung Cho, Hyosun Kim, Dong-Hwan Yoon, Seong-Min Son, Kyung-Won Suh   +6 more
doaj   +1 more source

SiO v = 1 J = 5 → 4 Maser Emission from the Root of the “Water Fountain” Source W 43A

The Astrophysical Journal
We report here the first mapping of SiO v = 1 J  = 5 → 4 maser emission toward the “water fountain” source W 43A in order to explore the central stellar system driving the collimated, bipolar, fast jet.
Hiroshi Imai, Takeshi Hoshino, Daniel Tafoya, José F. Gómez, Jun-ichi Nakashima, Gabor Orosz   +5 more
doaj   +1 more source

Asymptotic giant branch stars in the GLIMPSE database

Astronomy & Astrophysics
Aims. The GLIMPSE database contains over one hundred million point sources between longitudes of −60° and +60° and most of these are asymptotic giant branch (AGB) stars within 16 kpc from the Sun.
Habing H. J., Habing M. A.
doaj   +1 more source

Methanol Masers as Tracers of Circumstellar Disks

, 1998
We show that in many methanol maser sources the masers are located in lines, with a velocity gradient along them which suggests that the masers are situated in edge-on circumstellar, or protoplanetary, disks.
Phillips, CJ (15475688), Byleveld, SE (15482594), Troup, ER (15482600), Wellington, KJ (15482603), Norris, RP (15475670), Simon Ellingsen (14735971), Peter McCulloch (14743786), Tzioumis, AK (15475700), Takahashi, Y (5387725), Gough, RG (15475706), Reynolds, JE (15475697), Kesteven, MJ (15478130), Diamond, PJ (15482597), Ferris, RH (15475748)   +13 more
core  

Imaging the Jet of MWC 349A with Resolved Radio Recombination Line Emission from ALMA

The Astrophysical Journal Letters
Jets and disk winds arise from materials with excess angular momentum ejected from the accretion disks in forming stars. How these structures are launched and how they impact the gas within the innermost regions of these objects remains poorly understood.
Antonio Martínez-Henares, Qizhou Zhang, Izaskun Jiménez-Serra, Jesús Martín-Pintado, Nuria Huélamo, Sirina Prasad, James Moran, Alejandro Báez-Rubio   +7 more
doaj   +1 more source

A 6 cm Formaldehyde Line Survey toward WISE Point Sources

The Astrophysical Journal Supplement Series
We conducted a 6 cm formaldehyde (H _2 CO) line survey across the northern sky, targeting 3149 high-mass star-forming region candidates selected from the all-sky Wide-field Infrared Survey Explorer (WISE) point-source catalog using the Shanghai TianMa 65
Jun-Ting Liu, Xi Chen, Xu-Jia Ouyang, Yan-Kun Zhang, Shi-Min Song, Zhang Zhao, Bin Li, Bo Xia, Zhi-Qiang Shen   +8 more
doaj   +1 more source

High Resolution Studies of Circumstellar Masers

, 1996
This thesis describes in detail the observational procedures that we have followed and developed to analyze several research projects organized at Onsala since 1990 to study the regions of SiO maser emission at 43 GHz in the circumstellar envelopes of ...
Colomer Sanmartin, Francisco,
core   +1 more source

Developing asymmetries in AGB stars : occurrence, morphology and polarization of circumstellar Masers [PDF]

, 2011
My PhD research focuses on the maser emission which occurs in different regions of the circumstellar envelopes (CSEs) of evolved stars and can be studied at high angular resolution using radio interferometers.
Amiri, N.
core