9.8k citations
- Centre National de la Recherche ScientifiqueFR249 papers
- Tata Institute of Fundamental ResearchIN205 papers
- California Institute of TechnologyUS176 papers
- Sorbonne UniversitéFR141 papers
- University of SouthamptonGB135 papers
- Goddard Space Flight CenterUS123 papers
- Pennsylvania State UniversityUS123 papers
- Stanford UniversityUS121 papers
- University of BirminghamGB119 papers
- Max Planck Institute for Gravitational PhysicsDE118 papers
- Australian National UniversityAU114 papers
- Massachusetts Institute of TechnologyUS111 papers
7 papers · 2 filters
The dispersion of growth of matter perturbations in f(R) gravity
Shinji Tsujikawa, Radouane Gannouji, Bruno Moraes +1
We study the growth of matter density perturbations delta_m for a number of viable f(R) gravity models that satisfy both cosmological and local gravity constraints, where the Lagra…
A Multifrequency Study of Double-Double Radio Galaxies
M. Jamrozy, C. Konar, D. J. Saikia +1
One of the striking examples of episodic activity in active galactic nuclei are the double-double radio galaxies (DDRGs) with two pairs of oppositely-directed radio lobes from two…
Spectral Ages of Giant Radio Sources
C. Konar, D. J. Saikia, M. Jamrozy +1
Multifrequency observations with the GMRT and the VLA are used to determine the spectral breaks in consecutive strips along the lobes of a sample of selected giant radio sources (G…
Possible Relic Lobes in Giant Radio Sources
S. Godambe, C. Konar, D. J. Saikia +1
We present low-frequency observations with the GMRT of three giant radio sources (J0139+3957, J0200+4049 and J0807+7400) with relaxed diffuse lobes which show no hotspots and no ev…
21-cm absorbers at intermediate redshifts
N. Gupta, R. Srianand, P. Petitjean +2
Damped Lyman-alpha systems (DLAs) seen in the spectra of high-z QSOs allow us to probe the physical conditions in protogalaxies. Our understanding of physical conditions in DLAs at…
CMB bispectrum from primordial magnetic fields on large angular scales
T. R. Seshadri, Kandaswamy Subramanian
Primordial magnetic fields lead to non-Gaussian signals in the Cosmic Microwave Background (CMB) even at the lowest order, as magnetic stresses, and the temperature anisotropy they…