...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >NH$_{3}$ Survey Observation of Massive Star-Forming Region W 43
【24h】

NH$_{3}$ Survey Observation of Massive Star-Forming Region W 43

机译：NH $ _ {3} $大质量恒星形成区W 43的观测观测

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Weconsiderthepropertiesofgiantmolecularcloudcomplexesinthestar-formingregionW43witharesolutionofseveralpcscale,anddiscusstheirrelationstotheevolutionarystagesofmassivestarformation.WeperformedaNH$$_{3}$$($$J$$,$$K$$)$$=$$(1,1),(2,2),and(3,3)inversion-linesurveywiththeHokkaidoUniversity11-mtelescope.Among51observedpositions,selectedbasedonintegratedintensitymapsof$$^{13}$$CO($$J$$$$=$$1a€“0),thesethreeemissionsweredetectedfrom21,8,and5positions,respectively.TheintegratedintensityoftheNH$$_{3}$$($$J$$,$$K$$)$$=$$(1,1)linewasfoundtobeproportionaltothefar-infraredluminosity,estimatedfromIRASdata.Therotationtemperatureswerededucedtobe$$sim$$15a€“20Kateightobservedpositions.Inaddition,theupperlimitswereestimatedfor13positions,whichincludetherelativelylowtemperaturesbelow14KattwopositionswitharelativelyhighfractionsofNH$$_{3}$$for$$^{13}$$COandwithalowfar-infraredluminosity.Wederivedtheortho-to-paraabundanceratioofNH$$_{3}$$.Fromthepopulationdistributionbetweentheortho-andpara-levelsofNH$$_{3}$$,wealsoderivedtemperaturesof$$sim$$6a€“12K,whichmaybeinterpretedasthetemperatureswhenNH$$_{3}$$moleculeswereformed.Wediscusstherelevanceofthepresentresultsofourobservationstothemassivestar-formationprocessandthecurrentstatusoftheW43regionwhiletakingintoaccountpreviousobservationsofotherindicatorsofmassivestarformation.Itisshownthatthecomplexescontainseveralregionsindifferentevolutionarystages,orwiththedistinctcharacteristicsofstarformationwithinatimescalesshorterthanthelifetimeofmassivestars.
机译：我们考虑了在星形成区域W43中具有数个PC分辨率的巨大分子云复合体的性质，并讨论了与大规模星形演化阶段的关系。我们对NH $ _ {3} $$（$$ J $$，$$ K $$）$$ = $$（1,1），（2,2,2,2北海道大学11米望远镜的反演线测量。在51个观察位置中，根据$$ ^ {13} $$ CO（$$ J $$$$ = $$ 1a€“ 0）的集成强度图进行选择，分别从NH的21、8和5个位置中检测到这些强度。 } $$（$$ J $$，$$ K $$）$$ = $$（1,1）线是根据IRAS数据估算的，与远红外发光度成正比。旋转温度建议为$ sim $$ 15a，“ 20Kateightserved温度位置”。另外，$ K表示第三个位置的K值，其最高值应低至$ 14。 _ {3} $$ for $$ ^ {13} $$ CO和较低的红外发光度。从理论上得出NH $$ _ {3} $$的理论到参数丰度比率。 } $$，wealsoderivedtemperaturesof $$ SIM $$ 6A€“12K，whichmaybeinterpretedasthetemperatureswhenNH $$ _ {3} $$ moleculeswereformed.Wediscusstherelevanceofthepresentresultsofourobservationstothemassivestar-formationprocessandthecurrentstatusoftheW43regionwhiletakingintoaccountpreviousobservationsofotherindicatorsofmassivestarformation.Itisshownthatthecomplexescontainseveralregionsindifferentevolutionarystages，orwiththedistinctcharacteristicsofstarformationwithinatimescalesshorterthanthelifetimeofmassivestars。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号