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Browsing by Author "Subramaniam, Annapurni"

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Field blue straggler stars: discovery of white dwarf companions to blue metal-poor stars using UVIT/AstroSat

Panthi, Anju; Subramaniam, Annapurni; Vaidya, Kaushar; Jadhav, Vikrant; Rani, Sharmila; Thirupathi, Sivarani; Pandey, Sindhu (Monthly Notices of the Royal Astronomical Society, 2023-10)

Blue 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) ...
GlobULeS – V. UVIT/AstroSat studies of stellar populations in NGC 362: detection of blue lurkers in a globular cluster

Dattatrey, Arvind K.; Yadav, R. K. S.; Kumawat, Gourav; Rani, Sharmila; Singh, Gaurav; Subramaniam, Annapurni; Singh, Ravi S. (Monthly Notices of the Royal Astronomical Society Letters, 2023-07)

We report the discovery of four blue lurkers with low- and extremely low mass white dwarf (ELM WD) companions in the Galactic globular cluster NGC 362 using AstroSat’s Ultra Violet Imaging Telescope (UVIT). We analysed ...
UOCS – VI. UVIT/AstroSat detection of low-mass white dwarf companions to four more blue stragglers in M67

Pandey, Sindhu; Subramaniam, Annapurni; Jadhav, Vikrant V. (Monthly Notices of the Royal Astronomical Society, 2021-10)

Blue straggler stars (BSSs) in M67 have attracted attention from observations and theory to unravel their formation mechanisms. In the series of Ultra Violet Imaging Telescope (UVIT on AstroSat) study of Open clusters ...

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