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Saha Theory Workshop: Cosmology at the Interface

28–30 Jan 2015
Asia/Calcutta timezone

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Session

Astro Physics-I

29 Jan 2015, 14:00

Conveners

Astro Physics-I

  • Tirthankar Roy CHOUDHURY

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  1. 15. A Direct Measurement of the Mean Occupation Function of Quasars: Breaking Degeneracies between Halo Occupation Distribution Models
    Dr Suchetana Chatterjee (Assistant Professor)
    29/01/2015, 14:00
    Contributory Talks
    Recent work on quasar clustering suggests a degeneracy in the halo occupation distribution constrained from two-point correlation functions. To break this degeneracy, we make the first empirical measurement of the mean occupation function (MOF) of quasars at z ~ 0.2 by matching quasar positions with groups and clusters identified in the MaxBCG sample. We fit two models to the MOF, a power law...
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  2. 14. The effect of non-Gaussianity on error predictions for the Epoch of Reionization (EoR) 21-cm power spectrum
    Mr Rajesh Mondal (Indian Institute of Technology Kharagpur)
    29/01/2015, 14:15
    Contributory Talks
    Observations of the redshifted 21-cm signal from neutral hydrogen (HI) are a very promising probe of the Epoch of Reionization (EoR), and there is a considerable observational effort underway to detect the EoR 21-cm power spectrum e.g. [GMRT][1], LOFAR, MWA, and PAPER. Observing the EoR 21-cm signal is one of the key scientific goals of the future telescope SKA. It is important to have...
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  3. 29. 21 cm signal from cosmic dawn
    Mr Raghunath Raghunath Ghara (NCRA-TIFR)
    29/01/2015, 14:30
    Contributory Talks
    Observations of redshifted 21 cm radiation from the epoch of reionization promises to provide information on the physical processes during that epoch. Many low frequency interferometers are trying to provide statistical measurements of this signal, such as its power spectrum. Beside observations numerical simulations are essential to derive tight constraints on different aspects of...
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  4. 16. Generation of large scale magnetic fields in the early universe driven by cosmological neutrinos
    Maxim Dvornikov (USP)
    29/01/2015, 14:45
    Contributory Talks
    I study the generation of cosmic magnetic fields in the primordial plasma of the early universe. A strong large scale magnetic field can be created owing to the instability caused by the parity violating interaction between charged leptons and neutrino-antineutrino gas. For this purpose I calculate the most general expression for the Chern-Simons parameter in this background matter using the...
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  5. 73. Free slot
    29/01/2015, 15:00
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