IIAP Publications: Recent submissions

  • Estimating the masses of narrow line Seyfert 1 galaxies using damped random walk method 
    Rachana; Vivek, M; Shen, Yue (Oxford University Press on behalf of Royal Astronomical Society, 2026-01)
    Narrow-line Seyfert 1 galaxies (NLSy1s) are a subclass of active galactic nuclei (AGNs), commonly associated with rapidly accreting, relatively low-mass black holes (106 –108 M) hosted in spiral galaxies. Although typically ...
  • Venus as an exoplanet analogue: Extended UV transit signatures and coronal occultations 
    Tisyagupta, Pyne; Ravindra, B; Banyal, R. K (Oxford University Press on behalf of Royal Astronomical Society, 2026-01)
    Stellar activity manifests differently across wavelengths, causing flux variability that can obscure planetary transits. While transit observations are typically performed in the visible and infrared bands, where stellar ...
  • The vertical structure of the stellar disk in NGC 55 
    Raut, Harshal; Patra, Narendra Nath; Biswas, Prerana; Roy, Nirupam; Kalinova, Veselina; Dzib, Sergio; Colombo, Dario; Villanueva, Vicente; Sanchez, Sebastian F (EDP Sciences, 2025-07)
    Aims. This paper aims to self-consistently determine the 3D density distribution of the stellar disk in NGC 551 and to utilize it to study the observational signatures of two-component stellar disks (thin and thick) in ...
  • The VMC survey: LII. data release #7: Complete survey data and data from additional programmes 
    Cioni, Maria-Rosa L; Cross, N. J. G; Ripepi, V; Girardi, L; de Grijs, R; Clementini, G; van Loon, Jacco Th; Groenewegen, M. A. T; Ivanov, Valentin D; Oliveira, Joana M; Marconi, M; Bekki, K; Blake, R. P; Holliman, M. J; Irwin, J; Irwin, M. J; Mann, R. G; Read, M; Sutorius, E; Craig, J. E. M; Cusano, F; Dresbach, F; Maitra, Chandreyee; Molinaro, Roberto; Niederhofer, Florian; Omkumar, Abinaya O; Pennock, Clara M; Sicignano, T; Subramanian, S; Tatton, Ben L; Vijayasree, S; Zaggia, S (EDP Sciences, 2025-07)
    Context. The near-infrared Y JKs Visual and Infrared Survey Telescope for Astronomy (VISTA) survey of the Magellanic Clouds (VMC) is complete, along with data from additional programmes contributing to the enhancement of ...
  • Harvesting fermionic field entanglement in Schwarzschild spacetime 
    Dubey, Nitesh K; Kolekar, Sanved (American Physical Society, 2025-07-15)
    We explore entanglement harvesting using two Unruh-DeWitt (UDW) detectors linearly coupled to the scalar density of a massless spin-1=2 field in 1 þ 1 Schwarzschild spacetime. We consider different vacua, including the ...
  • Dwarf-dwarf interactions and their influence on star formation: Insights from post-merger galaxies 
    Chauhan, Rakshit; Subramanian, S; Kudari, Deepak A; Amrutha, S; Das, Mousumi (EDP Sciences, 2025-10)
    Interactions and mergers play a crucial role in shaping the physical properties of galaxies. Dwarf galaxies are the dominant galaxy population at all redshifts, and the majority of mergers are expected to occur between ...
  • Probing supernova diversity through high-cadence optical observations 
    Misra, K; Ailawadhi, Bhavya; Dastidar, R; Dubey, Monalisa; Dukiya, Naveen; Gangopadhyay, A; Janghel, Divyanshu; Pranshu, Kumar; Singh, Mridweeka (Multidisciplinary Digital Publishing Institute, 2025-11)
    Supernovae (SNe) are among the most energetic and transient events in the universe, offering crucial insights into stellar evolution, nucleosynthesis, and cosmic expansion. Optical observations have historically played a ...
  • Astrophysics with compact objects: An Indian perspective, present status and future vision 
    Bagchi, Manjari; Bera, Prasanta; Beri, Aru; Bhattacharya, D; Bhattacharyya, B; Bhattacharyya, Sudip; Chakraborty, Manoneeta; Chatterjee, Debarati; Chatterjee, Sourav; Chattopadhyay, I; Das, Santabrata; Konar, S; Majumdar, P; Misra, R; Mukherjee, A; Mukhopadhyay, B; Pahari, Mayukh; Singh, Krishna Kumar; Surnis, Mayuresh; Sutaria, F. K; Tendulkar, Shriharsh (Springer Nature, 2025-12)
    Astrophysical compact objects, viz., white dwarfs, neutron stars and black holes, are the remnants of stellar deaths at the end of their life cycles. They are ideal testbeds for various fundamental physical processes under ...
  • A prototype radio interferometer system with commercial dish TV antennas for observations of the solar chromospheric magnetic field 
    Kathiravan, C; Gireesh, G. V. S; Barve, Indrajit V; Sayuf, Shaik; Ramesh, R (Springer Nature, 2025-12)
    We are exploring the possibility of carrying out radio interferometric observations of the solar chromosphere at ≈ 11.2 GHz (λ=2.68 cm), in both total intensity (Stokes-I) and circularly polarized intensity (Stokes-V), ...
  • Combining local and global magnetohydrodynamic simulation frameworks to understand the evolution of coronal mass ejections 
    Singh, Talwinder; Maity, Samriddhi Sankar; Chatterjee, Piyali; Pogorelov, Nikolai (Springer Nature, 2025-12)
    Coronal mass ejections (CMEs) are one of the primary sources of space weather disturbances and associated geomagnetic storms on Earth. Magnetohydrodynamic simulations of magnetic flux ropes are being actively investigated ...
  • An alternative iterative scheme to the full non-LTE transfer problem with coherent scattering in the atom’s frame 
    Lagache, T; Sampoorna, M; Paletou, F (Oxford University Press on behalf of the Royal Astronomical Society, 2025-01)
    We propose an alternative scheme for the computation of the so-called ‘full non-LTE’ (non-local thermodynamic equilibrium) radiative transfer problem, assuming coherent scattering in the atom’s frame. This generalized ...
  • A new broad-band atmospheric dispersion corrector for HROS-TMT 
    Manjunath, B; Sivarani, T; Wehbe, Bachar; Hasan, Amirul; Chandra, B; Divakar, D. K; Unni, Athira; Parvathy, M; Surya, Arun; Saraf, Pallavi (Oxford University Press on behalf of the Royal Astronomical Society, 2025-01)
    Atmospheric dispersion causes light from celestial objects with different wavelengths to refract at varying angles as it passes through Earth’s atmosphere. This effect results in an elongated image at the focal plane of a ...
  • Star formation in interacting galaxy systems: UVIT imaging of NGC 7252 and NGC 5291 
    Santhosh, Geethika; Rajalakshmi, Rakhi; George, K; Subramanian, S; Indulekha, K (Cambridge University Press on behalf of Astronomical Society of Australia, 2025-04)
    Interactions play a significant role in the formation and evolution of galaxies in the Universe. The galaxy systems, NGC 7252 and NGC 5291, are two nearby interacting systems that are hosting tidal dwarf galaxies (TDGs) ...
  • Magnetic fields on different spatial scales of the L328 cloud 
    Gupta, Shivani; Archana Soam; Karoly, Janik; Lee, Chang Won; Maheswar, G (Oxford University Press on behalf of Royal Astronomical Society, 2025-06)
    L328 core has three sub-cores S1, S2, and S3, among which the sub-core S2 contains L328-IRS, a Very Low Luminosity Object, which shows a CO bipolar outflow. Earlier investigations of L328 mapped cloud/envelope (parsec-scale) ...
  • Comprehensive variability analysis of blazars using Fermi light curves across multiple timescales 
    Shah, Zahir; Dar, Athar A; Akbar, Sikandar; Peer, Anjum; Malik, Zahoor; Manzoor, Aaqib; Ahanger, Sajad; Tantry, Javaid; Nazir, Zeeshan; Bose, D; Magray, Mushtaq (American Physical Society, 2025-06-15)
    In this study, we conducted a systematic analysis of long-term Fermi-LAT γ-ray data for a sample of blazars, including flat spectrum radio quasars (FSRQs), BL Lacertae objects (BL Lacs), and blazar candidates of unknown ...
  • Discovery of changing-look behavior in AGN NGC3822: A long-term multiwavelength study 
    Layek, Narendranath; Nandi, Prantik; Naik, Sachindra; Chhotaray, Birendra; Jana, Arghajit; Dash, Priyadarshee P; Neeraj, Kumari; Stalin, C. S; Bandari, Srikanth; Muneer, S (American Astronomical Society, 2025-12-01)
    We present a comprehensive long-term multiwavelength study of the active galactic nucleus NGC 3822, based on 17 yr (2008─2025) of X-ray, ultraviolet (UV), and optical observations. The data set includes observations from ...
  • An intense geomagnetic storm originated from stealth coronal mass ejection: Remote and in situ observations by near radially aligned spacecraft 
    Vemareddy, P; Selva Bharathi, K (American Astronomical Society, 2025-11-20)
    We investigate the solar origin and heliospheric evolution of an intense geomagnetic storm that occurred on 2023 March 23─24. Despite multiple candidate coronal mass ejections (CMEs) observed between March 19 and 21, a ...
  • A kinematic and structural study of young open clusters in the Milky Way galaxy using Gaia DR3 catalogue 
    Harsha, K. H; Subramaniam, A; Dhanush, S. R; Hariharan, D. S (Springer Nature, 2025-12)
    We aim to identify the cluster members, estimate cluster properties, study the dynamical state of the clusters as a function of mass, trace the existence of dynamical effects in massive stars, and check for spatial patterns ...
  • On-axis afocal telescopes as framework for Cubesat based astronomical imagers and slit-less spectrographs 
    Mishra, Anwesh Kumar; Banerjee, Gourav; Mohan, Rekhesh; Maheswar, G (Springer Nature, 2025-12)
    CubeSats present unique opportunities for observational astronomy in the modern era. They are useful in observing difficult-to-access wavelength regions and long-term monitoring of interesting astronomical sources. However, ...
  • Identification of large-scale (>100 kpc) radio jets in narrow-line seyfert 1 galaxies 
    Umayal, S; Paliya, Vaidehi S; Saikia, D. J; Stalin, C. S; Muneer, S; Maheswar, G (American Astronomical Society, 2025-12-10)
    Powerful, large-scale relativistic jets are usually associated with massive, old elliptical galaxies. This paradigm has recently been challenged by the identification of narrow-line Seyfert 1 (NLSy1) galaxies, thought to ...

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