VLBA Observation of SiO Masers in the M Giant IRC a€“10414

Imai Hiroshi; Deguchi Shuji; Miyoshi Makoto

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VLBA Observation of SiO Masers in the M Giant IRC a€“10414

机译：M巨型IRC 10414中SiO Masers的VLBA观测

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WehavemappedanMgiantstar,IRCa¤“10414,intheSiOJ=1a€“0v=1lineat43.1GHzwiththeVLBAa€?withaspatialresolutionofbetterthan0.5mas.Themaserspotsspreadoveronacirclehavingaradiusofabout7.1mas.Avelocitygradientintheeast-westdirectionofa??0.7kmsa?’1masa?’1isfound.MonitoringobservationswithNobeyama45-mtelescopehaveshownthattheintensityratiooftheSiOJ=1a€“0v=1tov=2maserlinewasquiteunusual(5a€“40)fortheperiodof1997a€“1999inthisobject;thisratiowasknowntobeclosetounityinmanylate-typestellarobjects,butwasknowntodeviatestronglyfromunityinyoungstellarobjects.TheunusuallineintensityratioofthisstarmaysuggestachemicalorgeometricalanomalyoftheenvelopeofIRCa€“10414.Apossiblering/diskmodelisdiscussedinordertoexplainthedistributionofthemaserspotsinthisobject.

机译：我们测绘了Mgiantstar，IRCa¤“ 10414，在SiOJ = 1a€”，在43.1GHz上，VLBAa的0v = 1线;具有0.5毫微米更好的径向分辨率。这些物质点在整个圆周上散布有大约7.1 mass的半径。在东西向的西向的倾斜度= 1，在θa上测得的西欧= 1，在1公里处的θ的西西向运动度表示为0，在1处发现了0.7 kma的西阿波马射线，即在1处发现了1Ω的西阿波西分布。 1tov = 2maserlinewasquiteunusual（5α€ “40）fortheperiodof1997a€” 1999inthisobject; thisratiowasknowntobeclosetounityinmanylate typestellarobjects，butwasknowntodeviatestronglyfromunityinyoungstellarobjects.TheunusuallineintensityratioofthisstarmaysuggestachemicalorgeometricalanomalyoftheenvelopeofIRCa€“10414.Apossiblering / diskmodelisdiscussedinordertoexplainthedistributionofthemaserspotsinthisobject。

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《PASJ: Publications of the Astronomical Society of Japan》 |1999年第5期|共页
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Imai Hiroshi; Deguchi Shuji; Miyoshi Makoto;
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VLBA Observation of SiO Masers in the M Giant IRC a€“10414

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