Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/8255
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dc.contributor.authorPanthi, Anju-
dc.contributor.authorSubramaniam, A-
dc.contributor.authorVaidya, Kaushar-
dc.contributor.authorJadhav, Vikrant V-
dc.contributor.authorSharmila Rani-
dc.contributor.authorSivarani, T-
dc.contributor.authorPandey, Sindhu-
dc.date.accessioned2023-09-13T06:53:52Z-
dc.date.available2023-09-13T06:53:52Z-
dc.date.issued2023-10-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Vol. 525, No. 1, pp. 1311–1328en_US
dc.identifier.issn1365-2966-
dc.identifier.urihttp://hdl.handle.net/2248/8255-
dc.descriptionRestricted Accessen_US
dc.description.abstractBlue metal-poor (BMP) stars are the main-sequence stars that appear bluer and more luminous than normal turn-off stars of metal-poor globular clusters. They are believed to be either field blue straggler stars (FBSS) formed via post-mass transfer mechanism or accreted from dwarf satellite galaxies of the Milky Way. A significant fraction of BMP stars are discovered to be potential binaries. We observed 27 BMP stars using UVIT/AstroSat in two FUV filters, F148W and F169M. We report the discovery of white dwarf (WD) companions of 12 BMP stars for the first time. The WD companions have estimated temperatures Teff ∼10 500–18 250 K, and masses 0.17–0.8 M⊙. Based on [Fe/H] and space velocity, we group the 12 BMP/FBSS stars as the thick disc (5) and halo (5), whereas two stars appear to be in-between. All the 5 thick disc BMP/FBSS have extremely low-mass (M < 0.2 M⊙) WDs as companions, whereas the 5 halo BMP/FBSS have low (0.2 M⊙ < M < 0.4 M⊙), normal (0.4 M⊙ < M < 0.6 M⊙), and high mass (M > 0.6 M⊙) WD companions. Our analysis suggests that at least ∼44 per cent of BMP stars are FBSS, and these stars hold the key to understand the details of mass transfer, binary properties, and chemical enrichment among the FBSS.en_US
dc.language.isoenen_US
dc.publisherOxford University Press on behalf of Royal Astronomical Societyen_US
dc.relation.urihttps://doi.org/10.1093/mnras/stad2385-
dc.rights© Royal Astronomical Society-
dc.subjectBinaries: generalen_US
dc.subjectBlue stragglersen_US
dc.subjectWhite dwarfsen_US
dc.subjectUltraviolet: starsen_US
dc.titleField blue straggler stars: discovery of white dwarf companions to blue metal-poor stars using UVIT/AstroSaten_US
dc.typeArticleen_US
Appears in Collections:IIAP Publications



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