Database of molecular masers and variable stars  

作　　者：Andrej M.Sobolev Dmitry A. Ladeyschikov Jun-ichi Nakashima 

机构地区：[1]Astronomical Observatory,Ural Federal University,Lenin Avenue 51,620000,Ekaterinburg,Russia [2]Department of Astronomy,Geodesy and Environment Monitoring,Ural Federal University,Lenin Avenue 51,620000,Ekaterinburg,Russia

出　　处：《Research in Astronomy and Astrophysics》2019年第3期13-20,共8页天文和天体物理学研究（英文版）

基　　金：funded by the Russian Foundationfor Basic Research through research project 18-32-00605;supported by Russian Science Foundation grant18-12-00193;supported by Act 211 of theGovernment of the Russian Federation, agreement No.02.A03.21.0006

摘　　要：We present the database of maser sources in H2 O, OH and Si O lines that can be used to identify and study variable stars at evolved stages. Detecting the maser emission in H2 O, OH and Si O molecules toward infrared-excess objects is one of the methods for identifing long-period variables(LPVs, including miras and semiregulars), because these stars exhibit maser activity in their circumstellar shells. Our sample contains 1803 known LPV objects. Forty-six percent of these stars(832 objects) manifest maser emission in the line of at least one molecule: H2 O, OH or Si O. We use the database of circumstellar masers in order to search for LPVs which are not included in the General Catalogue of Variable Stars(GCVS). Our database contains 4806 objects(3866 objects without associations in GCVS) with maser detection in at least one molecule. Therefore it is possible to use the database in order to locate and study the large sample of LPV stars. The database can be accessed at http://maserdb.net.We present the database of maser sources in H2 O, OH and Si O lines that can be used to identify and study variable stars at evolved stages. Detecting the maser emission in H2 O, OH and Si O molecules toward infrared-excess objects is one of the methods for identifing long-period variables(LPVs, including miras and semiregulars), because these stars exhibit maser activity in their circumstellar shells. Our sample contains 1803 known LPV objects. Forty-six percent of these stars(832 objects) manifest maser emission in the line of at least one molecule: H2 O, OH or Si O. We use the database of circumstellar masers in order to search for LPVs which are not included in the General Catalogue of Variable Stars(GCVS). Our database contains 4806 objects(3866 objects without associations in GCVS) with maser detection in at least one molecule. Therefore it is possible to use the database in order to locate and study the large sample of LPV stars. The database can be accessed at http://maserdb.net.

关 键 词：catalogs-astronomical DATABASES STARS VARIABLES general-stars masers-physical data and processes 

分 类 号：P[天文地球]