22 citations · 115 across the 24 of their papers we have counts for
25 papers
Very Large Telescope observations of interstellar comet 3I/ATLAS III: High-resolution monitoring of CN and forbidden oxygen emission across the perihelion passage with ESPRESSO
Baltasar Luco, Thomas H. Puzia, Rohan Rahatgaonkar +2
We characterize in 3I/ATLAS the heliocentric evolution of the CN production rate and the forbidden [OI] emission, describe the broader emission line inventory, and release the anal…
Revealing Unresolved White Dwarf-Main Sequence Binaries using Gaia DR3 and GALEX I. A Volume limited study of 100 pc
Prasanta K. Nayak
Context. Understanding the demographics of white dwarf - main sequence (WDMS) binaries is key to uncovering the formation of various stellar exotica and refining the details of bin…
Spectral Characteristics of Interstellar Object 3I/ATLAS from SOAR Observations
Thomas H. Puzia, Rohan Rahatgaonkar, Juan Pablo Carvajal +2
Interstellar objects (ISOs) provide unique insights into the building blocks and conditions of extrasolar planetary systems. The newly discovered object, 3I/ATLAS (C/2025 N1), repr…
Very Large Telescope Observations of Interstellar Comet 3I/ATLAS. II. From Quiescence to Glow: Dramatic Rise of Ni i Emission and Incipient CN Outgassing at Large Heliocentric Distances*
Rohan Rahatgaonkar, Juan Pablo Carvajal, Thomas H. Puzia +25
We report VLT spectroscopy of the interstellar comet 3I/ATLAS (C/2025~N1) from to ~au using X-shooter (300--550\,nm, ) and UVES (opt…
Sloan Digital Sky Survey-V: Pioneering Panoptic Spectroscopy
Juna A. Kollmeier, Hans-Walter Rix, Conny Aerts +217
The Sloan Digital Sky Survey-V (SDSS-V) is pioneering panoptic spectroscopy: it is the first all-sky, multi-epoch, optical-to-infrared spectroscopic survey. SDSS-V is mapping the s…
Relighting the fire in Hickson Compact Group (HCG) 15: magnetised fossil plasma revealed by the SKA Pathfinders & Precursors
C. J. Riseley, T. Vernstrom, L. Lovisari +26
In the context of the life cycle and evolution of active galactic nuclei (AGN), the environment plays an important role. In particular, the over-dense environments of galaxy groups…
Beyond the Main Sequence: Binary Evolution Pathways to Blue Stragglers in the Gaia Era I. Galactic Open and Globular Clusters
Francisco F. Carrasco-Varela, Prasanta K. Nayak, Thomas H. Puzia
Context. The study of blue straggler stars (BSS) provides insight into the mechanisms of stellar mass exchange during binary stellar evolution and the complex gravitational interac…
Open Cluster Study Using I:Membership and Cluster Properties
Anindya Ganguly, Prasanta K. Nayak, Sourav Chatterjee
Star clusters are interesting laboratories to study star formation, single and binary stellar evolution, and stellar dynamics. We have used the exquisite data from 's data re…
uGMRT Survey of EXoplanets Around M-dwarfs (GS-EXAM): Radio observations of GJ 1151
Mayank Narang, Manoj Puravankara, H. K. Vedantham +9
Coherent radio emission with properties similar to planetary auroral signals has been reported from GJ 1151, a quiescent, slow-rotating mid-M star, by the LOFAR Two-metre (120-170…
Demography of stellar radio population within 500 pc: A VLASS-Gaia DR3 study
Ayanabha De, Mayank Narang, Manoj Puravankara +5
In this work, we have carried out a systematic analysis of the VLASS quick look catalogs together with \textit{Gaia DR3} to identify the optical counterparts of 3~GHz radio emitter…
UVIT Study of the MAgellanic Clouds (U-SMAC) II. A Far-UV catalog of the Small Magellanic Cloud: Morphology and Kinematics of young stellar population
Sipra Hota, Annapurni Subramaniam, Prasanta K. Nayak +1
The Small Magellanic Cloud (SMC) is an irregular dwarf galaxy that has recently undergone an interaction with the Large Magellanic Cloud. The young massive stars in the SMC formed…
Host star properties of hot, warm and cold Jupiters in the solar neighborhood from \textit{Gaia} DR3: clues to formation pathways
Bihan Banerjee, Mayank Narang, P. Manoj +5
Giant planets exhibit diverse orbital properties, hinting at their distinct formation and dynamic histories. In this paper, using DR3, we investigate if and how the…
UVIT/AstroSat observation of TW Hya
Prasanta K. Nayak, Mayank Narang, P. Manoj +7
The paper demonstrates the spectroscopic and photometric capabilities of the Ultra-Violet Imaging Telescope (UVIT) to study T-Tauri stars (TTSs). We present the first UVIT/Far-UV (…
Simultaneous FUV and NUV observations of T Tauri stars with UVIT/AstroSat: probing accretion process in young stars
Prasanta K. Nayak, Mayank Narang, P. Manoj +4
We present results from simultaneous FUV and NUV observations of T-Tauri stars (TTSs) in the Taurus molecular cloud with UVIT/AstroSat. This is the very first UVIT study of TTSs. F…
A chemodynamical analysis of bright metal-poor stars from the HESP-GOMPA survey -- Indications of a non-prevailing site for light r-process elements
Avrajit Bandyopadhyay, Timothy C Beers, Rana Ezzeddine +5
We present a comprehensive analysis of the detailed chemical abundances for a sample of 11 metal-poor, very metal-poor and extremely metal-poor stars ([Fe/H] = -1.65 to [Fe/H] = -3…
A uGMRT search for radio emission from planets around evolved stars
Mayank Narang, P. Manoj, Ishwara Chandra +8
In this work, we present the results from a study using the Giant Meterwave Radio Telescope (GMRT) to search for radio {emission} from planets around three evolved stars namely …
Spatio-temporal map of star clusters in the Magellanic Clouds using Gaia: Synchronized peaks and radial shrinkage of cluster formation
S. R. Dhanush, A. Subramaniam, Prasanta K. Nayak +1
We present a detailed view of cluster formation (CF) to trace the evolution and interaction history of the Magellanic Clouds (MCs) in the last 3.5 Gyr. Using the \textit{Gaia} DR3…
Identifying the population of T-Tauri stars in Taurus: UV-optical synergy
Prasanta K. Nayak, Mayank Narang, Manoj Puravankara +9
With the third data release of the Gaia mission DR3 with its precise photometry and astrometry, it is now possible to study the behaviour of stars at a scale never seen befo…
Optical spectroscopy of Gaia detected protostars with DOT: can we probe protostellar photospheres?
Mayank Narang, Manoj Puravankara, Himanshu Tyagi +7
Optical spectroscopy offers the most direct view of the stellar properties and the accretion indicators. Standard accretion tracers, such as , , and, Ca II triplet lines, a…
UV Spectral Characterization of Low-Mass Stars With AstroSat UVIT for Exoplanet Applications: The Case Study of HIP 23309
Sukrit Ranjan, Prasanta K. Nayak, J. Sebastian Pineda +1
Characterizing rocky exoplanet atmospheres is a key goal of exoplanet science, but interpreting such observations will require understanding the stellar UV irradiation incident on…
uGMRT observations of the hot-Saturn WASP 69b: Radio-Loud Exoplanet-Exomoon Survey II (RLEES II)
Mayank Narang, Apurva V. Oza, Kaustubh Hakim +7
Exomoons have so far eluded ongoing searches. Several studies have exploited transit and transit timing variations and high-resolution spectroscopy to identify potential exomoon ca…
Hunting Down White Dwarf--Main Sequence Binaries Using Multi-Wavelength Observations
Prasanta K. Nayak, Anindya Ganguly, Sourav Chatterjee
Identification of white dwarfs (WD) with main-sequence (MS) companions and characterization of their properties can put important constraints on our understanding of binary stellar…
White Dwarfs Revealed in Gaia's Candidate Compact Object Binaries
Anindya Ganguly, Prasanta K. Nayak, Sourav Chatterjee
Discovery and characterisation of black holes (BHs), neutron stars (NSs), and white dwarfs (WDs) with detached luminous companions (LCs) in wide orbits are exciting because they ar…
Li distribution, kinematics and detailed abundance analysis among very metal-poor stars in the Galactic halo from the HESP-GOMPA survey
Avrajit Bandyopadhyay, Thirupathi Sivarani, Timothy C. Beers +3
We present a study on the detailed elemental abundances of newly identified bright very metal-poor stars with the detection of lithium, initially observed as part of the SDSS/MARVE…