Zobrazeno 1 - 10
of 655
pro vyhledávání: '"T. R. Seshadri"'
Autor:
Lakshmanan Sriramkumar, T R Seshadri
This book comprises expository articles on different aspects of gravitation and cosmology that are aimed at graduate students. The topics discussed are of contemporary interest assuming only an elementary introduction to gravitation and cosmology. Th
Autor:
S. Suresh Babu, Manish Naja, Umesh Chandra Dumka, Hema Joshi, Mukunda M. Gogoi, T. R. Seshadri, Priyanka Srivastava
Publikováno v:
Asia-Pacific Journal of Atmospheric Sciences. 58:83-96
Accurate estimation of black carbon (BC) from the widely used optical attenuation technique is important for the reliable assessment of their climatic impact. The optical instruments use Mass Absorption Cross-section (MAC) for converting light attenu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::06e37b790a1a9c39a9fe678dea8a9dff
https://doi.org/10.1007/s13143-021-00241-6
https://doi.org/10.1007/s13143-021-00241-6
Implications of baryon–dark matter interaction on IGM temperature and tSZ effect with magnetic field
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 500:643-654
We show that the combined effect of cosmic magnetic field and a possible non-standard interaction between baryons and dark matter has interesting consequences on the thermal Sunyaev$-$Zel${'}$dovich (tSZ) effect depending on the temperature and the i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::614284c69dd0a9978c4a988ab9cce0f7
https://doi.org/10.1093/mnras/staa3281
https://doi.org/10.1093/mnras/staa3281
Astrophysical magnetic fields decay primarily via two processes namely, ambipolar diffusion and turbulence. Constraints on the strength and the spectral index of non-helical magnetic fields have been derived earlier in the literature through the effe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d915537622f017fd78a687efa1859d25
Magnetic fields have been observed in galaxy clusters with strengths of the order of $\sim \mu$G. The non-thermal pressure exerted by magnetic fields also contributes to the total pressure in galaxy clusters and can in turn affect the estimates of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b3116a9a8a7116964b1799060b7fa31
http://arxiv.org/abs/1909.07847
http://arxiv.org/abs/1909.07847
Generation of magnetic fields during inflation is a promising mechanism for the origin of the observed large scale magnetic fields in the universe. Among several attempts, a popular model is one where the inflaton and the electromagnetic field are co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ed2b9428280cd9216fd3c0a3949c0207
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 466:2302-2311
Fractal dimensions can be used to characterize the clustering and lacunarities in density distributions. We use generalized fractal dimensions to study the neutral hydrogen distribution (HI) during the epoch of reionization. Using a semi-numeric mode
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1b3fefb365d0c3cab51b9f93c80b876
https://doi.org/10.1093/mnras/stw3347
https://doi.org/10.1093/mnras/stw3347
Publikováno v:
The Astrophysical Journal. 890:132
We probed the magnetic fields in high-redshift galaxies using excess extragalactic contribution to residual rotation measure (RRM) for quasar sightlines with intervening Mg II absorbers. Based on a large sample of 1132 quasars, we have computed RRM d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29cda60aed0aceeeff98a780a58f4a47
https://doi.org/10.3847/1538-4357/ab6bd5
https://doi.org/10.3847/1538-4357/ab6bd5
Publikováno v:
International Journal of Modern Physics D. 29:2050029
We study the possibility of reheating the universe in its early stages through the evaporation of Primordial Black Holes (PBHs) that are formed due to the collapse of the inhomogeneities that were generated during inflation. By using the current resu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55954a8abe57a72e94277a5948c04c1e
https://doi.org/10.1142/s0218271820500297
https://doi.org/10.1142/s0218271820500297
We study the generation of helical magnetic fields in a model of inflationary magnetogenesis which is free from the strong coupling and back-reaction problems. To generate helical magnetic fields, we add an $f^2 \tilde{F}^{\mu\nu} F_{\mu\nu}$ term to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fcfe4fd96765cd1c54aa7b2885c1fc34