IIA Institutional Repository

Browsing by Author "Sur, Sharanya"

Browsing by Author "Sur, Sharanya"

Sort by: Order: Results:

  • Decaying turbulence and magnetic fields in galaxy clusters 
    Sur, Sharanya (Oxford University Press on behalf of the Royal Astronomical Society, 2019-12)
    We explore the decay of turbulence and magnetic fields generated by fluctuation dynamo action in the context of galaxy clusters where such a decaying phase can occur in the aftermath of a major merger event. ...
  • Decaying turbulence and magnetic fields in galaxy clusters 
    Sur, Sharanya (Oxford University Press on behalf of the Royal Astronomical Society, 2019-09)
    We explore the decay of turbulence and magnetic fields generated by fluctuation dynamo action in the context of galaxy clusters where such a decaying phase can occur in the aftermath of a major merger event. Using idealized ...
  • Exploring diffuse radio emission in galaxy clusters and groups with uGMRT and SKA 
    Paul, Surajit; Kale, Ruta; Basu, Aritra; Sur, Sharanya; Parekh, Viral; Gupta, Prateek; Chatterjee, Swarna; Salunkhe, Sameer; Iqbal, Asif; Pandey-Pommier, Mamta; Raja, Ramij; Rahaman, Majidul; Raychaudhury, Somak; Nath, Biman B; Majumdar, Subhabrata (Indian Academy of Sciences, 2023-06)
    Diffuse radio emission has been detected in a considerable number of galaxy clusters and groups, revealing the presence of pervasive cosmic magnetic fields, and of relativistic particles in the large scale structure of the ...
  • Faraday rotation signatures of fluctuation dynamos in young galaxies 
    Sur, Sharanya; Pallavi Bhat; Subramanian, K (Oxford University Press on behalf of the Royal Astronomical Society, 2018-03)
    Observations of Faraday rotation through high-redshift galaxies have revealed that they host coherent magnetic fields that are of comparable strengths to those observed in nearby galaxies. These fields could be generated ...
  • Galaxy outflows without supernovae 
    Sur, Sharanya; Scannapieco, E; Ostriker, E. C (IOP Publishing, 2016-02)
    High surface density, rapidly star-forming galaxies are observed to have ≈ 50 – 100 km s − 1 line of sight velocity dispersions, which are much higher than expected from supernova driving alone, but may arise from ...
  • Modeling the Survival of Population III Stars to the Present Day 
    Dutta, Jayanta; Sur, Sharanya; Stacy, Athena; Bagla, Jasjeet Singh (IOP Publishing, 2020-09-20)
    Recent numerical simulations have suggested the probability of a fraction of the primordial stars being ejected from the cluster of their origin. We explore the possibility that some of these can remain on the main sequence ...
  • Probing magnetic fields with square kilometre array and its precursors 
    Roy, S; Sur, Sharanya; Subramanian, K; Mangalam, A; Seshadri, T. R; Chand, H (Indian Academy of Sciences, 2016-12)
    Origin of magnetic fields, its structure and effects on dynamical processes in stars to galaxies are not well understood. Lack of a direct probe has remained a problem for its study. The first phase of Square Kilometre ...
  • Properties of polarized synchrotron emission from fluctuation-dynamo action – I. application to galaxy clusters 
    Sur, Sharanya; Basu, Aritra; Subramanian, Kandaswamy (Oxford University Press on behalf of the Royal Astronomical Society, 2021-03)
    Using magnetohydrodynamic simulations of fluctuation dynamos, we perform broad-bandwidth synthetic observations to investigate the properties of polarized synchrotron emission and the role that Faraday rotation plays in ...
  • Role of magnetic pressure forces in fluctuation dynamo saturation 
    Sur, Sharanya; Subramanian, Kandaswamy (Oxford University Press on behalf of Royal Astronomical Society, 2024-01)
    Using magnetohydrodynamic simulations of fluctuation dynamos in turbulent flows with rms Mach numbers Mrms = 0.2, 1.1, and 3, we show that magnetic pressure forces play a crucial role in dynamo saturation in supersonic ...
  • Survival of Population III stars 
    Dutta, Jayanta; Sur, Sharanya; Stacy, Athena; Bagla, Jasjeet Singh (Cambridge University Press, 2018-05)
    In our earlier studyDutta (2016a), it has been shown that a number of primordial protostars (the ‘first stars’ in the Universe, also known as Population III or Pop III stars) are being ejected from the cluster of their ...

Search DSpace

Browse

My Account