Search Results - "Seshadri, T R"

Primordial magnetic field limits from the CMB trispectrum: Scalar modes and Planck constraints by Trivedi, Pranjal, Subramanian, Kandaswamy, Seshadri, T. R.

“…Cosmic magnetic fields are observed to be coherent on large scales and could have a primordial origin. Non-Gaussian signals in the cosmic microwave background…”
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Role of Intervening Mg ii Absorbers on the Rotation Measure and Fractional Polarization of the Background Quasars by Malik, Sunil, Chand, Hum, Seshadri, T. R.

“…We probed the magnetic fields in high-redshift galaxies using excess extragalactic contribution to residual rotation measure (RRM) for quasar sightlines with…”
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Cosmic microwave background bispectrum from primordial magnetic fields on large angular scales by Seshadri, T R, Subramanian, Kandaswamy

“…Primordial magnetic fields lead to non-Gaussian signals in the cosmic microwave background (CMB) even at the lowest order, as magnetic stresses and the…”
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Cosmic microwave background trispectrum and primordial magnetic field limits by Trivedi, Pranjal, Seshadri, T R, Subramanian, Kandaswamy

“…Primordial magnetic fields will generate non-gaussian signals in the cosmic microwave background (CMB) as magnetic stresses and the temperature anisotropy they…”
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Thawing versus tracker behaviour: observational evidence by Thakur, Shruti, Nautiyal, Akhilesh, Sen, Anjan A., Seshadri, T. R.

“…Currently there exist a variety of scalar field models that attempt to explain the late-time acceleration of the Universe. This includes the standard canonical…”
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Testing homogeneity on large scales in the Sloan Digital Sky Survey Data Release One by Yadav, Jaswant, Bharadwaj, Somnath, Pandey, Biswajit, Seshadri, T. R.

“…The assumption that the Universe is homogeneous and isotropic on large scales is one of the fundamental postulates of cosmology. We have tested the large-scale…”
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Implications of Site‐specific Mass Absorption Cross‐section (MAC) to Black Carbon Observations at a High‐altitude Site in the Central Himalaya by Srivastava, Priyanka, Naja, Manish, Seshadri, T. R., Joshi, Hema, Dumka, U. C., Gogoi, Mukunda M., Babu, S. Suresh

“…Accurate estimation of black carbon (BC) from the widely used optical attenuation technique is important for the reliable assessment of their climatic impact…”
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Fractal dimensions of a weakly clustered distribution and the scale of homogeneity by Bagla, J. S., Yadav, Jaswant, Seshadri, T. R.

“…Homogeneity and isotropy of the universe at sufficiently large scales is a fundamental premise on which modern cosmology is based. Fractal dimensions of matter…”
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Small-scale cosmic microwave background polarization anisotropies due to tangled primordial magnetic fields by Subramanian, Kandaswamy, Seshadri, T. R., Barrow, John. D.

“…Tangled, primordial cosmic magnetic fields create small rotational velocity perturbations on the last scattering surface (LSS) of the cosmic microwave…”
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Investigating cosmic homogeneity using multifractal analysis of the SDSS-IV eBOSS DR16 quasar catalogue by Goyal, Priya, Malik, Sunil, Yadav, Jaswant K, Seshadri, T R

“…ABSTRACT We analyse the volume-limited subsamples extracted from the sixteenth data release of the Sloan Digital Sky Survey-IV (SDSS-IV) eBOSS quasar survey…”
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AstroSat observation of the magnetar SGR J1830−0645 during its first detected X-ray outburst by Sharma, Rahul, Jain, Chetana, Paul, Biswajit, Seshadri, T R

“…ABSTRACT We present here timing and spectral analyses of SGR J1830−0645 based on an AstroSat observation carried out on 2020 October 16, about a week after the…”
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Cosmic microwave background polarization signals from tangled magnetic fields by Seshadri, T R, Subramanian, K

“…Tangled, primordial cosmic magnetic fields create small rotational velocity perturbations on the last scattering surface of the cosmic microwave background…”
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Core orientations and magnetic fields in isolated molecular clouds by Sharma, Ekta, Gopinathan, Maheswar, Soam, Archana, Lee, Chang Won, Seshadri, T R

“…ABSTRACT Molecular clouds are sites of star formation. Magnetic fields are believed to play an important role in their dynamics and shaping morphology. We aim…”
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Implications of baryon–dark matter interaction on IGM temperature and tSZ effect with magnetic field by Pandey, Arun Kumar, Malik, Sunil, Seshadri, T R

“…ABSTRACT We show that the combined effect of cosmic magnetic field and a possible non-standard interaction between baryons and dark matter (DM) has interesting…”
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Utilising BC observations to estimate CO contributions from fossil fuel and biomass burning in the Central Himalayan region by Srivastava, Priyanka, Naja, M, Bhardwaj, P, Kumar, R, Rajwar, M C, Seshadri, T R

“…The Himalayan region is adversely affected by the increasing anthropogenic emissions from the adjacent Indo-Gangetic plain. However, source apportionment…”
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Studying neutral hydrogen structures during the epoch of reionization using fractal dimensions by Bandyopadhyay, Bidisha, Choudhury, T Roy, Seshadri, T R

“…Fractal dimensions can be used to characterize the clustering and lacunarities in density distributions. We use generalized fractal dimensions to study the…”
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Cosmological magnetogenesis from extra-dimensional Gauss-Bonnet gravity by Atmjeet, Kumar, Pahwa, Isha, Seshadri, T. R., Subramanian, Kandaswamy

“…Generation of primordial magnetic fields during inflation typically requires the breaking of conformal invariance of the electromagnetic action. In this paper…”
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Non-minimally coupled f(R) cosmology by Thakur, Shruti, Sen, Anjan A., Seshadri, T.R.

“…We investigate the consequences of non-minimal gravitational coupling to matter and study how it differs from the case of minimal coupling by choosing certain…”
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Probing Magnetic Fields with Square Kilometre Array and its Precursors by Roy, Subhashis, Sur, Sharanya, Subramanian, Kandaswamy, Mangalam, Arun, Seshadri, T. R., Chand, Hum

“…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…”
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Learning about the Universe from Cosmic Microwave Background Radiation by Seshadri, T. R.

“…The Cosmic Microwave Background Radiation (CMBR) is a nearly isotropic radiation that carries information about the state of the Universe in its early phase…”
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