水脉泽辐射的探测和时变考察

用中科院射电联合实验室上海天文台２５米望远镜，对１９个已知水脉泽源和２０个ＨＩＩ区候选源进行了水脉泽观测和搜寻，共测到水脉泽辐射２１个，包括２个首次测到Ｓ／Ｎ≥３σ的源．结合已知脉泽资料求出了脉泽时变，发现峰值流量的变化比较普遍，包括同一峰强度变化及不同成分置换引起的变化两种情况，峰值速度变化多数由不同成分置换所造成．证认了对应的ＩＲＡＳ源并探讨了脉泽辐射与红外参量的关系，表明红外辐射的强度对脉泽产生率的影响比颜色分布的影响大．

Observations and Studies of Celestial Water Masers

sing the 25 m telescope of Shanghai Astronomy Observatory, Joint Radio AstronomyLab., water vapor maser emission at 22.2 GHz was surveyed for 19 known maser sources and20 candidates of HII regions, 21 sources were detected, of which two are for the first time.Combining with some previous measured data, the time variations in the flux and velocitywere obtained and discussed. Time variation in the peak flux density is common and includestwo types, changes in the intensity of the same peak and swapping over of different peaks.And the later type also causes shifts in the peak velocity. Corresponding IRAS sources wereidentified and the relation between maser emission and the infrared parameters discussed.It is shown that the infrared intensity has a greater effect on maser production rate thanthe infrared color distribution.