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Browsing by Subject "Hertzsprung"

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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; Sharmila Rani; Singh, Gaurav; Subramaniam, A; Singh, Ravi S (Oxford University Press on behalf of Royal Astronomical Society, 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 ...
Lithium in red giants: the roles of the He-core flash and the luminosity bump

Deepak; Lambert, D. L (Oxford University Press on behalf of the Royal Astronomical Society, 2021-10)

Lithium abundances for red giants in the GALAH DR3 survey are studied. The rare examples of Li-enriched stars with abundances A(Li) ≥1.5 are confirmed to be He-core burning stars belonging to or evolved from the red clump ...
S stars and s-process in the Gaia era I. Stellar parameters and chemical abundances in a sub-sample of S stars with new MARCS model atmospheres

Shetye, S; Van Eck, S; Jorissen, A; Van Winckel, H; Siess, L; Goriely, S; Escorza, A; Drisya, K; Plez, B (EDP Sciences, 2018-12)

Context. S stars are transition objects between M-type giants and carbon stars on the asymptotic giant branch (AGB). They are characterized by overabundances of s-process elements. Roughly half of them are enhanced in ...
UVIT-HST-Gaia-VISTA study of Kron 3 in the small magellanic cloud: a cluster with an extended red clump in ultraviolet

Nayak, P. K; Subramaniam, A; Subramanian, S; Sahu, S; Mondal, C; Cioni, Maria-Rosa L; Bell, Cameron P. M; Bandyopadhyay, A; Chung, Chul (Oxford University Press on behalf of the Royal Astronomical Society, 2021-06)

We have demonstrated the advantage of combining multiwavelength observations, from the ultraviolet (UV) to near-infrared, to study Kron 3, a massive star cluster in the Small Magellanic Cloud. We have estimated the radius ...

Browsing by Subject "Hertzsprung"

Browsing by Subject "Hertzsprung"

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