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Browsing by Author "Goswami, A"

Browsing by Author "Goswami, A"

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  • The spectrum of the cool R Coronae Borealis variable Z Ursae Minoris at minimum 
    Goswami, A; Kameswara Rao, N; Lambert, D. L (The Observatory, 1999-02)
  • Stellar and Galactic studies with the 2-m Himalayan Chandra Telescope 
    Goswami, A (Societe Royale des Sciences de Liege, 2019-10)
    The Himalayan Chandra Telescope (HCT), of the Indian Astronomical Observatory (IAO), is currently one of the most heavily subscribed telescopes in India. The telescope has been in regular use for scientific observations ...
  • The stellar parametrization using Artificial Neural Network 
    Giridhar, S; Goswami, A; Kunder, A; Muneer, S; Selvakumar, G (Astronomical Society of India, 2012)
    An update on recent methods for automated stellar parametrization is given. We present preliminary results of the ongoing program for rapid parametrization of field stars using medium resolution spectra obtained using Vainu ...
  • Stellar yields and Galactic chemical evolution 
    Goswami, A (Astronomical Society of India, 2011)
    The chemical composition of stars belonging to the halo and the disk of our Galaxy as well as a few nearby galaxies are the primary sources of our understanding of the Galactic Chemical Evolution (GCE). The abundance trends ...
  • Study of chemically peculiar stars - I. High-resolution spectroscopy and K2 photometry of Am stars in the region of M44 
    Joshi, Santosh; Trust, Otto; Semenko, E; Williams, P. E; Lampens, P; De Cat, P; Vermeylen, L; Holdsworth, D. L; García, R. A; Mathur, S; Santos, A. R. G; Mkrtichian, D; Goswami, A; Cuntz, M; Yadav, A. P; Sarkar, M; Bhatt, B. C; Kahraman Alicavus, F; Nhlapo, M. D; Lund, M. N; Goswami, P. P; Savanov, I; Jorissen, A; Jurua, E; Avvakumova, E; Dmitrienko, E. S; Chakradhari, N. K; Das, M. K; Chowdhury, S; Abedigamba, O. P; Yakunin, I; Letarte, B; Karinkuzhi, D (Oxford University Press on behalf of Royal Astronomical Society, 2022-03)
    We present a study based on the high-resolution spectroscopy and K2 space photometry of five chemically peculiar stars in the region of the open cluster M44. The analysis of the high-precision photometric K2 data reveals ...
  • Subaru/HDS study of CH stars: elemental abundances for stellar neutron-capture process studies 
    Goswami, A; Aoki, W; Drisya, K (Oxford University Press on behalf of the Royal Astronomical Society, 2016-01)
    A comprehensive abundance analysis providing rare insight into the chemical history of lead stars is still lacking. We present results from high-resolution (R ∼ 50 000) spectral analyses of three CH stars, HD 26, HD ...
  • SUBARU/HDS Study of HE 1015−2050: Spectral Evidance of R Coronae Borealis Light Decline 
    Goswami, A; Aoki, Wako (IOP Publishing, 2013-02-01)
    Hydrogen deficiency and a sudden optical light decline of about 6-8 mag are two principal characteristics of R Coronae Borealis (RCB) stars. The high latitude carbon star HE 1015–2050 was identified as a hydrogen-deficient ...
  • The synthesis of Al-26 during combined hydrogen and helium-burning reactions 
    Goswami, A; Ramadurai, S; Duorah, H. L (Springer Netherlands, 1992-02)
    The synthesis of Al-26 during combined hydrogen and helium-burning processes in high temperature and density conditions is studied. The possible sites for these processes are believed to be the neutron star surfaces where ...
  • Understanding AGB Nucleosynthesis from Chemical Composition Studies of CH Stars 
    Drisya, K; Goswami, A (Astronomical Society of the Pacific, 2015-08)
    CH stars are known to show enhanced abundances of carbon and heavy s-process elements. They are metal-deficient population II objects. Their luminosities indicate that they are mostly giants; hence, the observed enhanced ...

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