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Related papers: SiO Maser Forest at the Galactic Center

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Mapping and monitoring observations of SiO maser sources near the Galactic center were made with the Nobeyama 45-m telescope at 43 GHz. Rectangular mapping an area of approximately 200'' x 100''$ in a 30'' grid, and triangular mapping in a…

Astrophysics · Physics 2015-06-24 Shuji Deguchi , Takahiro Fujii , Makoto Miyoshi , Jun-ichi Nakashima

We present results of 3 mm observations of SiO maser sources in the Galactic Centre (GC) from observations with the Australia Telescope Compact Array between $2010-2014$, along the transitions of the SiO molecule at $v = 1, J = 2-1$ at…

Astrophysics of Galaxies · Physics 2019-10-01 A. Borkar , A. Eckart , C. Straubmeier , L. O. Sjouwerman , V. Karas , D. Kunneriath , L. Moser , S. Britzen , M. Valencia-S , A. Donea , A. Zensus

We present results on a search for 86.243 GHz SiO (J = 2 -- 1, v = 1) maser emission toward 67 OH/IR stars located near the Galactic Centre. We detected 32 spectral peaks, of which 28 correspond to SiO maser lines arising from the envelopes…

Astrophysics of Galaxies · Physics 2020-07-08 M. Messineo , L. O. Sjouwerman , H. J. Habing , A. Omont

We have surveyed ~400 known large-amplitude variables within 15' of the galactic center in the SiO J=1--0 v=1 and 2 maser lines at 43 GHz, resulting in 179 detections. SiO lines were also detected from 16 other resulting in 180 detections.…

Astrophysics · Physics 2015-06-24 S. Deguchi , H. Imai , T. Fujii , I. S. Glass , Y. Ita , H. Izumiura , O. Kameya , A. Miyazaki , Y. Nakada , J. Nakashima

We present the Australia Telescope Compact Array (ATCA) observations of the SiO masers in the Galactic center in transitions of v=1, J=2--1 at 86 GHz and v=1, J=1--0 at 43 GHz. Two 86-GHz SiO masers were detected within the central parsec,…

Astrophysics of Galaxies · Physics 2010-07-28 Juan Li , Tao An , Zhi-Qiang Shen , Atsushi Miyazaki

We have surveyed 401 color selected IRAS sources in the Galactic disk in the SiO J=1--0 v= 1 and 2 maser lines at 43 GHz, resulting in 254 (239 new) detections. The observed sources lie mostly in a strip of the inner Galactic disk with…

Astrophysics · Physics 2015-06-24 S. Deguchi , T. Fujii , I. S. Glass , H. Imai , Y. Ita , H. Izumiura , O. Kameya , A. Miyazaki , Y. Nakada , J. Nakashima

We present the results of an SiO maser survey for color-selected IRAS sources in the area 40 < l < 70 and |b| < 10 in the SiO J=1-0, v=1 and 2 transitions. We detected 134 out of 272 observed sources in SiO masers; 127 were new detections.…

Astrophysics · Physics 2015-06-24 Jun-ichi Nakashima , Shuji Deguchi

We present sensitive Australia Telescope Compact Array (ATCA) observations of SiO masers in the inner parsecs of the Galactic center (GC). We detected five SiO J=2-1, v=1 (86 GHz) masers in the innner 25 arcsec (1 pc) of the GC. All the…

Astrophysics of Galaxies · Physics 2010-02-08 Juan Li , Tao An , Zhi-Qiang Shen , Atsushi Miyazaki

We have surveyed known large-amplitude variables within 15' of the Galactic center in the SiO J=1-0 v=1 and 2 maser lines at 43 GHz, resulting in 79 detections and 58 non-detections. The detection rate of 58 percent is comparable to that…

Astrophysics · Physics 2015-06-24 H. Imai , S. Deguchi , T. Fujii , I. S. Glass , Y. Ita , H. Izumiura , O. Kameya , A. Miyazaki , Y. Nakada , J. Nakashima

We present the results of observations of cold IRAS sources in the Galactic disk area, -10 < l < 100 and |b|<5, in the SiO J=1-0, v=1 and 2 maser lines. SiO masers were detected in 51 out of 143 observed sources; 45 were new detections in…

Astrophysics · Physics 2015-06-24 Jun-ichi Nakashima , Shuji Deguchi

We have searched for the SiO J=1--0 v= 1 and 2 maser lines at ~ 43 GHz in 277 2MASS/MSX/IRAS sources off the Galactic plane (|b|> 3 deg), which resulted in 119 (112 new) detections. Among the new detections, are two very faint objects with…

We have identified a weak thermal line U42.767, which has been detected only in the directions toward Sgr A and Sgr B2, as the HOCO+ 2_{02}--1_{01} transition. Because of the proximity of this line to the SiO maser line at 42.821 GHz (J=1-0…

Astrophysics · Physics 2015-06-24 Shuji Deguchi , Atsushi Miyazaki , Young Chol Minh

We conducted an SiO maser survey towards 221 O-rich AGB stars with the aim of identifying maser emission associated with the Sagittarius stellar stream. In this survey, maser emission was detected in 44 targets, of which 35 were new…

Astrophysics of Galaxies · Physics 2017-11-29 Yuanwei Wu , Noriyuki Matsunaga , Ross A. Burns , Bo Zhang

We present 86 GHz (v = 1, J = 2 -1) SiO maser line observations with the IRAM 30-m telescope of a sample of 441 late-type stars in the Inner Galaxy (-4 degr < l < +30 degr). These stars were selected on basis of their infrared magnitudes…

Astrophysics · Physics 2009-11-07 M. Messineo , H. J. Habing , L. O. Sjouwerman , A. Omont , K. M. Menten

We have mapped the J=1-0 line of SiO in a 1 degree x 12 arcmin. (lxb) region around the Galactic center (GC) with an angular resolution of 2 arcmin. (approx. 4 pc). In contrast to the spatial distribution of other high dipole moment…

Astrophysics · Physics 2009-10-30 J. Martin-Pintado , P. de Vicente , A. Fuente , P. Planesas

We present 3D velocity measurements and acceleration limits for stars within a few parsec of the Galactic Center (GC) black hole, Sgr A*, based on observations of 43 and 86 GHz circumstellar maser emission. Observations were taken with the…

Astrophysics of Galaxies · Physics 2022-03-30 Jennie Paine , Jeremy Darling

We surveyed 291 MSX/2MASS infrared objects in the 7 x 2 deg area of the galactic center in the 43 GHz SiO J=1--0 v=1 and 2 maser lines, obtaining accurate radial velocities of 163 detected objects. The surveyed area is the region where the…

We have discovered a new H$_2$CO (formaldehyde) $1_{1,0}-1_{1,1}$ 4.82966 GHz maser in Galactic Center Cloud C, G0.38+0.04. At the time of acceptance, this is the eighth region containing an H$_2$CO maser detected in the Galaxy. Cloud C is…

We present a study of signatures of on-going star formation in a sample of protostellar objects with enhanced 4.5 {\mu}m emission ('green' sources) near the Galactic center. To understand how star formation in the Galactic center region…

Astrophysics of Galaxies · Physics 2015-05-27 Edward T. Chambers , Farhad Yusef-Zadeh , Doug Roberts

We have searched for 22 GHz H2O and 43/86/129 GHz SiO masers in bright IRAS point sources in the SMC and LMC, to test whether the kinematics of the mass loss from these stars depends on metallicity. H2O masers were detected in the red…

Astrophysics · Physics 2009-11-06 Jacco Th. van Loon , Albert A. Zijlstra , Valentin Bujarrabal , Lars-Ake Nyman
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