5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Aryabhatta Research Institute of Observational SciencesIN239 papers
- Tata Institute of Fundamental ResearchIN175 papers
- Centre National de la Recherche ScientifiqueFR133 papers
- Pondicherry UniversityIN120 papers
- Indian Institute of Science BangaloreIN119 papers
- Inter-University Centre for Astronomy and AstrophysicsIN114 papers
- Christ UniversityIN108 papers
- National Centre for Radio AstrophysicsIN98 papers
- Physical Research LaboratoryIN92 papers
- Chinese Academy of SciencesCN77 papers
- Instituto de Astrofísica de CanariasES77 papers
- National Astronomical Observatory of JapanJP77 papers
16 papers · 2 filters
Pulsar Radio Emission Altitude from Curvature Radiation
R. T. Gangadhara
We assume that the relativistic sources moving along the dipolar magnetic field lines emit curvature radiation. The beamed emission occurs in the direction of tangents to the field…
Effects of Dust Scattering in Expanding Spherical Nebulae
M. Srinivasa Rao, Sujan Sengupta
The mean intensity of planetary nebulae with an expanding atmosphere is modeled by considering dusty and dust-free atmospheres. The bulk matter density is determined from the adopt…
Centrifugal Acceleration in Pulsar Magnetosphere
R. M. C. Thomas, R. T. Gangadhara
We present a relativistic model of pulsar radio emission by plasma accelerated along the rotating magnetic field lines projected on to a 2D plane perpendicular to the rotation axis…
Sunyaev-Zel'dovich Effect by Multiple Sctattering : Numerical Solution of the Transfer Equations
Sujan K. Sengupta
The radiative transfer equations for multiple inverse Compton scattering of the Cosmic Microwave Background Radiation (CMBR) by the hot intra-cluster electrons are solved numerical…
A High-resolution Spectrum of the R CrB Star V2552 Ophiuchi
N. Kameswara Rao, David L. Lambert
Photometry and low-resolution spectroscopy have added V2552 Oph to the rare class of R Coronae Borealis variables. We confirm this classification of V2552 Oph through a comparison…
HD 34700: A new T Tauri double-lined spectroscopic binary
A. Arellano Ferro, Sunetra Giridhar
We find the star HD 34700 to be a double-lined spectroscopic binary. We also identify it as a weak-line T Tauri object The spectra of both components are very similar and both show…
The afterglow and the host galaxy of GRB 011211
P. Jakobsson, J. Hjorth, J. P. U. Fynbo +19
We present optical, near-infrared, and X-ray observations of the optical afterglow (OA) of the X-ray rich, long-duration gamma-ray burst GRB 011211. Hubble Space Telescope (HST) da…
Ultrahigh Energy Cosmic Rays and Prompt TeV Gamma Rays from Gamma Ray Bursts
Pijushpani Bhattacharjee, Nayantara Gupta
Gamma Ray Bursts (GRBs) have been proposed as one {\it possible} class of sources of the Ultrahigh Energy Cosmic Ray (UHECR) events observed up to energies $\gsim10^{20}\ev$. The s…
ISOGAL: A deep survey of the obscured inner Milky Way with ISO at 7 and 15 micron and with DENIS in the near-infrared
A. Omont, G. Gilmore, C. Alard +38
The ISOGAL project is an infrared survey of specific regions sampling the Galactic Plane selected to provide information on Galactic structure,stellar populations,stellar mass-loss…
Optical afterglow of the not so dark GRB 021211
S. B. Pandey, G. C. Anupama, R. Sagar +5
We determine Johnson and Cousins photometric CCD magnitudes for the afterglow of GRB 021211 during the first night after the GRB trigger. The afterglow was very faint a…
Photometry and low resolution spectroscopy of hot post-AGB candidates
G. Gauba, M. Parthasarathy, Brijesh Kumar +2
We have obtained Johnson U, B, V and Cousins R, I photometry and low resolution spectra of a small sample of hot post-AGB candidates. Using the present data in combination with JHK…
NGC 1245 - an intermediate age open cluster
Annapurni Subramaniam
The B,V CCD photometry of 916 stars in the field of the high galactic latitude intermediate age open cluster NGC 1245 is presented. The cluster parameters were estimated with the h…
Explaining the Observed Polarization from Brown Dwarfs by Single Dust Scattering
Sujan Sengupta
Recent observation of linear optical polarization from brown dwarfs confirms the dust hypothesis in the atmospheres of brown dwarfs with effective temperature higher than 1400 K. T…
Magnetic Field Geometry in "Red" and "Blue" BL Lacs
P. Kharb, D. C. Gabuzda, P. Shastri
We compare the systematics of the magnetic field geometry in the "red" low-energy peaked BL Lacs (LBLs) and "blue" high-energy peaked BL Lacs (HBLs) using VLBI polarimetric images.…
Pc-scale study of Radio galaxies & BL Lacs
P. Kharb, P. Shastri, D. C. Gabuzda
We study two aspects of the differences between Active Galactic Nuclei (AGN) of the two Fanaroff-Riley types in order to investigate the causes of the F-R divide. We (a) contrast t…
Magnetic Field Geometry of the Broad Line Radio Galaxy 3C111
P. Kharb, D. Gabuzda, W. Alef +2
Very Long Baseline Polarimetric observations of the Broad Line Radio galaxy 3C111 performed in July and September of 1996 at 8 and 43 GHz reveal rapidly evolving parsec-scale radio…