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
140 papers · 1 filter
Multiwavelength Signatures of Episodic Null Point Reconnection in a Quadrupolar Magnetic Configuration and the Cause of Failed Flux Rope Eruption
Prabir K. Mitra, Bhuwan Joshi, Astrid M. Veronig +1
In this paper, we present multiwavelength observations of the triggering of a failed-eruptive M-class flare from the active region NOAA 11302, and investigate the possible reasons…
Optical and near-infrared spectroscopy of Nova V2891 Cygni: evidence for shock-induced dust formation
Vipin Kumar, Mudit K. Srivastava, Dipankar P. K. Banerjee +6
We present multi-epoch optical and near-infrared observations of the highly reddened, \pion{Fe}{ii} class slow nova V2891 Cygni. The observations span 15 months since its discovery…
Scalar Dark Matter and Radiative Dirac neutrino mass in an extended model
Subhasmita Mishra, Nimmala Narendra, Prafulla Kumar Panda +1
We explore a gauged extension of standard model with inclusion of three right-handed neutrinos of exotic charges to cancel the gauge anomaly. Non-trivial transfo…
A comparative study of the physical properties for a representative sample of Narrow and Broad-line Seyfert galaxies
Vivek Kumar Jha, Hum Chand, Vineet Ojha +2
We present a comparative study of the physical properties of a homogeneous sample of 144 Narrow line Seyfert 1 (NLSy1) and 117 Broad-line Seyfert 1 (BLSy1) galaxies. These two samp…
Self-interacting freeze-in dark matter in a singlet doublet scenario
Purusottam Ghosh, Partha Konar, Abhijit Kumar Saha +1
We examine the non-thermal production of dark matter in a scalar extended singlet doublet fermion model where the lightest admixture of the fermions constitutes a suitable dark mat…
Pluto's atmosphere in plateau phase since 2015 from a stellar occultation at Devasthal
Bruno Sicardy, Nagarhalli M. Ashok, Anandmayee Tej +13
A stellar occultation by Pluto was observed on 6 June 2020 with the 1.3-m and 3.6-m telescopes located at Devasthal, Nainital, India, using imaging systems in the I and H bands, re…
Remnant radio galaxy candidates of small angular sizes
Veeresh Singh, Sushant Dutta, Yogesh Wadadekar +1
Remnant radio galaxies (RRGs), characterized by the cessation of AGN activity, represent a short-lived last phase of radio galaxy's life-cycle. Hitherto, searches for RRGs, mainly…
X-ray confirmation of the intermediate polar IGR J16547-1916
A. Joshi, W. Wang, J. C. Pandey +5
Using X-ray observations from the NuSTAR and Swift satellites, we present temporal and spectral properties of an intermediate polar (IP) IGR J16547-1916. A persistent X-ray period…
Sh 2-301: a blistered H II region undergoing star formation
Rakesh Pandey, Saurabh Sharma, Lokesh K. Dewangan +6
We present a multiwavelength study of the H II region Sh 2-301 (S301) using deep optical data, near-infrared data, radio continuum data and other archival data at longer wavelength…
Fine-grained domain counting and percolation analysis in 2D lattice systems with linked-lists
Hrushikesh Sable, Deepak Gaur, D. Angom
We present a fine-grained approach to identify clusters and perform percolation analysis in a 2D lattice system. In our approach, we develop an algorithm based on the linked-list d…
Differential behaviors of suprathermal He and Fe populations in the interplanetary medium during solar cycle 24
Bijoy Dalal, Dibyendu Chakrabarty, Nandita Srivastava
Investigations on the solar cycle variation of the properties of suprathermal populations (H and other heavy ions like He, He, C, O and Fe) in the solar wind are sparse and…
Anomaly detection in high-energy physics using a quantum autoencoder
Vishal S. Ngairangbam, Michael Spannowsky, Michihisa Takeuchi
The lack of evidence for new interactions and particles at the Large Hadron Collider has motivated the high-energy physics community to explore model-agnostic data-analysis approac…
Higher-Order Photon Statistics as a New Tool to Reveal Hidden Excited States in a Plasmonic Cavity
Philipp Stegmann, Satyendra Nath Gupta, Gilad Haran +1
Among the best known quantities obtainable from photon correlation measurements are the ~correlation functions. Here, we introduce a new procedure to evaluate these correl…
Mars: new insights and unresolved questions
Hitesh G. Changela, Elias Chatzitheodoridis, Andre Antunes +33
Mars exploration motivates the search for extraterrestrial life, the development of space technologies, and the design of human missions and habitations. Here we seek new insights…
and Quest for New Physics
Anshika Bansal, Namit Mahajan, Dayanand Mishra
Charged current semi-leptonic decays of -meson are important for a precise determination of the CKM elements. The CKM elements and show a discrepancy betwe…
Evidence of Heavy Obscuration in the Low-Luminosity AGN NGC 4941
Arghajit Jana, Sachindra Naik, Neeraj Kumari
We present the results obtained from timing and spectral studies of the highly obscured low luminosity active galactic nucleus NGC~4941 using data obtained from the {\it Nuclear Sp…
Neutrino propagation when mass eigenstates and decay eigenstates mismatch
Dibya S. Chattopadhyay, Kaustav Chakraborty, Amol Dighe +2
We point out that the Hermitian and anti-Hermitian components of the effective Hamiltonian for decaying neutrinos cannot be simultaneously diagonalized by unitary transformations f…
A Comprehensive Study of the Young Cluster IRAS 05100+3723: Properties, Surrounding Interstellar Matter, and Associated Star Formation
R. K. Yadav, M. R. Samal, E. Semenko +13
We present a comprehensive multiwavelength investigation of a likely massive young cluster `IRAS 05100+3723' and its environment with the aim to understand its formation history an…
Imaging inspired characterization of single photons carrying orbital angular momentum
Vimlesh Kumar, Varun Sharma, Sandeep Singh +4
We report on an imaging-inspired measurement of orbital angular momentum (OAM) using only a simple tilted lens and an Intensified Charged Coupled Device (ICCD) camera, allowing us…
AstroSat observations of long-duration X-ray superflares on active M-dwarf binary EQ Peg
Subhajeet Karmakar, Sachindra Naik, Jeewan C. Pandey +1
We present a comprehensive study of three large long-duration flares detected on an active M-dwarf binary EQ Peg using the Soft X-Ray Telescope of the AstroSat observatory. The pea…
ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- V. Hierarchical fragmentation and gas dynamics in IRDC G034.43+00.24
Hong-Li Liu, Anandmayee Tej, Tie Liu +35
We present new 3-mm continuum and molecular lines observations from the ATOMS survey towards the massive protostellar clump, MM1, located in the filamentary infrared dark cloud (IR…
The disk-outflow system around the rare young O-type protostar W42-MME
L. K. Dewangan, I. I. Zinchenko, P. M. Zemlyanukha +6
We present line and continuum observations (resolution ~0.3"-3.5") made with the Atacama Large Millimeter/submillimeter Array (ALMA), Submillimeter Array, and Very Large Array of a…
Precise probing of the inert Higgs-doublet model at the LHC
Anupam Ghosh, Partha Konar, Satyajit Seth
The inert Higgs-doublet model provides a simple framework to accommodate a viable Higgs portal scalar dark matter candidate, together with other heavier scalars of mass 100 GeV or…
Leptogenesis and eV scale sterile neutrino
Srubabati Goswami, Vishnudath K. N., Ananya Mukherjee +1
We consider the minimal extended seesaw model which can accommodate an eV scale sterile neutrino. The scenario also includes three heavy right handed neutrinos in addition to the l…