Professor T. Padmanabhan

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Author: search.filters.author.Kumar, A.Subject: search.filters.subject.Protoclsters

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    Neutral hydrogen at high redshifts as a probe of structure formation
    (Indian Academy of Sciences, 1995-06-10) Kumar, A.; Subramanian, Kandaswamy; Padmanabhan, T.
    Structure formation at < 10.0 can be detected and studied using the 21 cm line emission from the neutral hydrogen. Two of us (Suramanian & Padmanabhan 1993, Paper I) had earlier computed the expected abundance of Procrustes as a function of the flux density a function of the flux density at various redshifts, in the detail how the HI line profile from a single spherically symmetric protocluster evolves as it decouples from hubble expansion and colapses. We find peak fluxes of the HI line profile to be typically of order 0.4-0.8 mJy while the widths (FWHM) are of order 0.6-1.5 Mhz. Such protoclusters could be detectable by the Giant Metrewave Radio Telescope (GMRT) which is being built in India.