518 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Indian Institute of Technology GandhinagarIN282 papers
- Tata Institute of Fundamental ResearchIN161 papers
- Centre National de la Recherche ScientifiqueFR100 papers
- Indian Institute of AstrophysicsIN92 papers
- Chinese Academy of SciencesCN71 papers
- Aryabhatta Research Institute of Observational SciencesIN66 papers
- Inter-University Centre for Astronomy and AstrophysicsIN62 papers
- Harish-Chandra Research InstituteIN54 papers
- Indian Institute of Science BangaloreIN54 papers
- Indian Institute of Technology BombayIN54 papers
- Udaipur Solar ObservatoryIN53 papers
- California Institute of TechnologyUS46 papers
16 papers · 2 filters
Search for Interstellar monohydric Thiols
Prasanta Gorai, Ankan Das, Amaresh Das +3
It has been pointed out by various astronomers that very interesting relationship exists between interstellar alcohols and the corresponding thiols (sulfur analogue of alcohols) as…
Detection of a pair of prominent X-ray cavities in Abell 3847
Nilkanth D. Vagshette, Sachindra Naik, Madhav. K. Patil +1
We present results obtained from a detailed analysis of a deep Chandra observation of the bright FR II radio galaxy 3C~444 in Abell~3847 cluster. A pair of huge X-ray cavities are…
The physical environment around IRAS 17599-2148: infrared dark cloud and bipolar nebula
L. K. Dewangan, D. K. Ojha, I. Zinchenko +3
We present a multi-scale and multi-wavelength study to investigate the star formation process around IRAS 175992148 that is part of an elongated filamentary structure (EFS) (ext…
Multi-wavelength study of the star-formation in the S237 H II region
L. K. Dewangan, D. K. Ojha, I. Zinchenko +2
We present a detailed multi-wavelength study of observations from X-ray, near-infrared to centimeter wavelengths to probe the star formation processes in the S237 region. Multi-wav…
From Nearby Low Luminosity AGN to High Redshift Radio Galaxies: Science Interests with SKA
P. Kharb, D. V. Lal, V. Singh +10
We present detailed science cases that a large fraction of the Indian AGN community is interested in pursuing with the upcoming Square Kilometre Array (SKA). These interests range…
GMRT observations of IC 711 -- The longest head-tail radio galaxy known
Shweta Srivastava, Ashok K. Singal
We present low-frequency, GMRT observations at 240, 610 and 1300 MHz of IC~711, a narrow angle tail (NAT) radio galaxy. The total angular extent of the radio emission, ar…
Star formation around mid-infrared bubble N37: Evidence of cloud-cloud collision
T. Baug, L. K. Dewangan, D. K. Ojha +1
We have performed a multi-wavelength analysis of a mid-infrared (MIR) bubble N37 and its surrounding environment. The selected 1515 area around the bubble contains two…
Dissecting Galaxies: Spatial and Spectral Separation of Emission Excited by Star Formation and AGN Activity
Rebecca L. Davies, Brent Groves, Lisa J. Kewley +13
The optical spectra of Seyfert galaxies are often dominated by emission lines excited by both star formation and AGN activity. Standard calibrations (such as for the star formation…
AGN driven perturbations in the intra-cluster medium of cool core cluster ZwCl 2701
Nilkanth D. Vagshette, Satish S. Sonkamble, Sachindra Naik +1
We present the results obtained from a total of 123 ks X-ray (Chandra) and 8 hrs of 1.4 GHz radio (Giant Metrewave Radio Telescope - GMRT) observations of the cool core cluster ZwC…
Relativistic Doppler beaming and misalignments in AGN jets
Ashok K. Singal
Radio maps of AGNs often show linear features, called jets, both on pc as well as kpc scales. These jets supposedly possess relativistic motion and are oriented close to the line o…
J1216+0709 : A radio galaxy with three episodes of AGN jet activity
Veeresh Singh, C. H. Ishwara-Chandra, Preeti Kharb +2
We report the discovery of a `Triple-Double Radio Galaxy (TDRG)' J1216+0709 detected in deep low-frequency Giant Metrewave Radio Telescope (GMRT) observations. J1216+0709 is only t…
Star formation activity in the neighbourhood of W-R 1503-160L star in the mid-infrared bubble N46
L. K. Dewangan, T. Baug, D. K. Ojha +4
In order to investigate star formation (SF) processes in extreme environments, we have carried out a multi-wavelength analysis of the mid-infrared bubble N46, which hosts a WN7 Wol…
The Role of Radiation Pressure in the Narrow Line Regions of Seyfert Host Galaxies
Rebecca L. Davies, Michael A. Dopita, Lisa J. Kewley +13
We investigate the relative significance of radiation pressure and gas pressure in the extended narrow line regions (ENLRs) of four Seyfert galaxies from the integral field Siding…
A GMRT Study of Seyfert Galaxies NGC4235 & NGC4594: Evidence of Episodic Activity ?
P. Kharb, S. Srivastava, V. Singh +3
Low frequency observations at 325 and 610 MHz have been carried out for two "radio-loud" Seyfert galaxies, NGC4235 and NGC4594 (Sombrero galaxy), using the Giant Meterwave Radio Te…
Post-maximum near infrared spectra of SN 2014J: A search for interaction signatures
D. J. Sand, E. Y. Hsiao, D. P. K. Banerjee +7
We present near infrared (NIR) spectroscopic and photometric observations of the nearby Type Ia SN 2014J. The seventeen NIR spectra span epochs from +15.3 to +92.5 days after -b…
A multi-wavelength study of star formation activity in the S235 complex
L. K. Dewangan, D. K. Ojha, A. Luna +4
We have carried out an extensive multi-wavelength study to investigate the star formation process in the S235 complex. The S235 complex has a sphere-like shell appearance at wavele…