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On the stability and pulsation in models of B[e] star MWC 137

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dc.contributor.author Parida, Sugyan
dc.contributor.author Yadav, Abhay Pratap
dc.contributor.author Kraus, Michaela
dc.contributor.author Glatze, Wolfgang
dc.contributor.author Joshi, Yogesh Chandra
dc.contributor.author Joshi, Santosh
dc.date.accessioned 2024-02-08T06:44:58Z
dc.date.available 2024-02-08T06:44:58Z
dc.date.issued 2024-01
dc.identifier.uri https://doi.org/10.1093/mnras/stad3626
dc.identifier.uri http://localhost:8080/xmlui/handle/123456789/1434
dc.description.abstract B[e] type stars are characterized by strong emission lines, photometric, and spectroscopic variabilities and unsteady mass-loss rates. MWC 137 is a galactic B[e] type star situated in the constellation Orion. Recent photometric observation of MWC 137 by TESS has revealed variabilities with a dominant period of 1.9 d. The origin of this variability is not known but suspected to be from stellar pulsation. To understand the nature and origin of this variability, we have constructed three different set of models of MWC 137 and performed non-adiabatic linear stability analysis. Several low order modes are found to be unstable in which models having mass in the range of 31–34 M and 43–46 M have period close to 1.9 d. The evolution of instabilities in the non-linear regime for model having solar chemical composition and mass of 45 M leads to finite amplitude pulsation with a period of 1.9 d. Therefore, in the present study we confirm that this variability in MWC 137 is due to pulsation. Evolutionary tracks passing through the location of MWC 137 in the Hertzsprung–Russell diagram indicate that the star is either in post main sequence evolutionary phase or about to enter in this evolutionary phase. en_US
dc.language.iso en en_US
dc.publisher Monthly Notices of the Royal Astronomical Society en_US
dc.relation.ispartofseries 2068;mn527-7414
dc.subject stars: evolution en_US
dc.subject stars: individual: MWC 137 en_US
dc.subject stars: massive en_US
dc.subject stars: oscillations en_US
dc.subject stars: variable: general en_US
dc.subject stars: winds, outflow en_US
dc.title On the stability and pulsation in models of B[e] star MWC 137 en_US
dc.type Article en_US


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