IIAP Publications: Recent submissions

  • Retrieval of precipitable water vapor from sun–sky radiometer (POM-01) at 940 nm absorption band: Calibration, measurement and validation 
    Mukhopadhyay, Swagata; Shantikumar, N. S; Uchiyama, Akihiro; Jorphail, S; Vivek, Chiranjeevi G; Shrungeshwara, T. S; Sreedevi, P; Matsunaga, Tsuneo; Sharma, S; Gupta, Pawan; Angchuk, D; Jade, S (Elsevier B.V., 2026-03-01)
    Sun–sky radiometer (model POM-01) is commonly used for studying aerosol optical and physical properties at selected aerosol-specific channels. Although the instrument is equipped with a precipitable water vapor (PWV) channel ...
  • UOCS-XIX. a multiwavelength study of open cluster Trumpler 5: Cluster properties and exotic populations 
    Chand, Komal; Panthi, Anju; Vaidya, Kaushar (American Astronomical Society, 2026-03)
    Trumpler 5 is a populous, intermediate-age (∼3 Gyr), metal-poor ([Fe/H] ∼ −0.4) open cluster, located at a distance of approximately ∼3050 pc. This is a well-studied cluster for its broadened main-sequence (MS) and blue ...
  • Unveiling SN 2022eyw: A bright member of the Type Iax supernova subclass 
    Das, Hrishav; Sahu, D. K; Dutta, Anirban; Singh, Mridweeka; Anupama, G. C; Teja, Rishabh Singh (American Astronomical Society, 2026-03-01)
    We present comprehensive photometric and spectroscopic observations of SN 2022eyw, a luminous member of the Type Iax supernova (SN Iax) subclass. SN 2022eyw reached a peak absolute magnitude of Mg = –17.80 ± 0.15 mag and ...
  • Probing the CME core–prominence relation using observations of the inner corona 
    Pradhan, Sunit Sundar; Joshi, Jayant; Samanta, T (American Astronomical Society, 2026-03-10)
    Coronal mass ejections (CMEs) often exhibit a three-part structure consisting of a bright inner core, an outer leading edge, and an intervening dark cavity. While the core has traditionally been attributed to prominence ...
  • Modeling the time-variable broadband emission and correlation study of FSRQ S5 1044+71 
    Ahanger, Sajad; Shah, Zahir; Sahayanathan, S; Iqbal, Naseer; Malik, Zahoor; Manzoor, Aaqib (American Astronomical Society, 2026-03-10)
    We present a detailed temporal and spectral analysis of the blazar S5 1044+71 using multiwavelength data obtained from the Fermi-LAT and Swift-XRT/UVOT telescopes. Applying the Bayesian block algorithm to the 3-day binned ...
  • On the origin of coronal picoflare jets 
    Bura, Annu; Nobrega-Siverio, Daniel; Samanta, T; Joshi, Jayant (American Astronomical Society, 2026-03-20)
    Small-scale jet-like eruptions, such as picoflare jets and jetlets, are recognized as potential contributors to coronal heating and solar wind acceleration, yet their physical origin is still not fully established. Using ...
  • Energy and mass transport associated with impulsive spicular flows in solar coronal holes 
    Ni, Lei; Lin, Jun; Samanta, T; Cheng, Guanchong; Wang, Yifu; Erdelyi, Robertus (American Astronomical Society, 2026-03-20)
    How the solar atmosphere is heated from a temperature of about 5000 to 6000 K in the lower atmosphere to about 1–2 MK in the corona has challenged the astrophysical community for nearly 80 yr. The same puzzle exists for ...
  • Detection of quasi-periodic oscillations in the 37 GHz radio light curve of the blazar Ton 599 during 1990─2020 
    Gupta, A. C; Volvach, A. E; Kishore, Shubham; Volvach, L. N; Wiita, P. J; Cui, Lang; Valtonen, Mauri J; Mondal, Sandeep K; Gaur, H (EDP Sciences, 2026-03)
    Context. Blazars are a subclass of radio-loud active galactic nuclei (AGN) that display strong multi-wavelength variability on diverse timescales ranging from years down to minutes. In the last 1.5 decades, there have been ...
  • Probing generalized emergent dark energy with DESI DR2 
    Sharma, Vipin Kumar; Chaudhary, Himanshu; Kolekar, Sanved (Elsevier B.V., 2026-03)
    As an update on the initial findings of DESI, the new results provide the first hint of potential deviations from a cosmological constant (𝜔 = −1), which, if confirmed with significance > (2 − 4)𝜎, would challenge the ...
  • Variability study and searching for quasiperiodic oscillations with day-like periods in the blazar S5 0716+714 with TESS 
    Kishore, Shubham; Gupta, A. C; Wiita, P. J (American Astronomical Society, 2026-02-20)
    Using an unprecedented cadence of 30 minutes provided by the Transiting Exoplanet Survey Satellite, we have examined the optical light curves (LCs) of the blazar S5 0716+714 obtained from its Sectors 40, 47, and 53 over ...
  • Fluctuation dynamos in supersonic turbulence at Pm ≳ 1 
    Nagdeo, Ameya Uday; Sur, Sharanya; Vaidya, Bhargav (American Astronomical Society, 2026-02-20)
    Fluctuation dynamos provide a robust mechanism for amplifying weak seed magnetic fields in turbulent astrophysical plasmas. However, their behaviour in the highly compressible regimes characteristic of the interstellar ...
  • Unveiling the dual nature of V1180 cas: UXor-like dips and EXor-like bursts across a decade 
    Chand, Tarak; Sharma, Saurabh; Singh, Koshvendra; Ninan, J. P; Ghosh, Arpan; Ojha, D. K; Baug, Tapas; Sahu, D. K; Bhatt, B. C; Pramod Kumar, S; Yadav, R. K; Panwar, Neelam; Verma, Aayushi; Kaur, Harmeen; Mamta; Chakraborty, Manojit; Gokhe, Kartik; Singh, Ajay Kumar (American Astronomical Society, 2026-02-20)
    We present a detailed analysis of the long-term photometric and spectroscopic evolution of V1180 Cas over a decade, aiming to identify the dominant mechanisms behind its variability. We combine multiband light curves from ...
  • Probing accretion dynamics and spin evolution in the X-ray pulsar RX J0520.5–6932 during its 2024 outburst 
    Rahul, Sharma; Beri, Aru; Paul, B; Sanna, Andrea; Maitra, Chandreyee; Yang, Haonan (EDP Sciences, 2026-02)
    Context. After nearly a decade of quiescence, the transient Be/X-ray binary pulsar RX J0520.5–6932 underwent an outburst in 2024. Weperformed X-ray monitoring of the source with NICER and AstroSat near the peak of the ...
  • The role of three William Herschel telescopes in colonial India 
    Kapoor, R. C (National Astronomical Research Institute of Thailand, 2025-09)
    In this paper we provide information on some of the telescopes to which one of the most prominent names in the history of astronomy is attached: Frederick William Herschel. He built telescopes of different apertures and ...
  • Chasing Mercury: Transit tales from India 
    Kapoor, R. C (National Astronomical Research Institute of Thailand, 2025-09)
    Planets passing across the disk of the Sun are among the most uncommon and fascinating phenomena in the Solar System. From the Earth, the transits of only Mercury and Venus can be seen. Early on, the transits of Venus were ...
  • Near ultraviolet transient explorer (nutex): a cubesat-based nuv imaging payload for transient sky surveys 
    Shubham Jankiram, Ghatul; Mohan, Rekhesh; Murthy, J; Safonova, M; Kumar, P; Gopinathan, Maheswar; Jain, Shubhangi; Mahesh Babu, S (Frontiers, 2025-12)
    The Near Ultraviolet Transient Explorer (NUTEx) is a CubeSat-based nearultraviolet (NUV) imaging payload designed for transient sky surveys and is currently under development. CubeSats are compact and cost-effective satellite ...
  • FIELDMAPS data release: Far-infrared polarization in the "bones" of the milky way 
    Coude, Simon; Stephens, Ian W; Myers, Philip C; Karnath, Nicole; Smith, Howard A; Guzman, Andres E; Marin, Jessy; Zucker, Catherine; Andersson, B-G; Li, Zhi-Yun; Looney, Leslie W; Novak, Giles; Pillai, Thushara G.S; Sadavoy, Sarah; Sanhueza, Patricio; Archana Soam (American Astronomical Society, 2026-01)
    Polarization observations of the Milky Way and many other spiral galaxies have found a close correspondence between the orientation of spiral arms and magnetic field lines on scales of hundreds of parsecs. This paper ...
  • The life and science of Thanu Padmanabhan (1957-2021) 
    Bagla, Jasjeet Singh; Bhattacharya, K; Chakraborty, Sumanta; Engineer, S; Faraoni, V; Kolekar, Sanved; Kothawala, D; Lochan, K; Modak, S; Nair, Parameswaran V; Paranjape, A; Parattu, K; Rajeev, S. G; Majhi, B. R; Choudhury, T. R; Sami, M; Sarkar, Sudipta; Sengupta, S; Seshadri, T. R; Shankaranarayanan, S; Singh, Surya Prakash; Singh, T. P; Sriramkumar, L; Yajnik, U. A (Springer Nature, 2026-01)
    Thanu Padmanabhan was a renowned Indian theoretical physicist known for his research in general relativity, cosmology, and quantum gravity. In an extraordinary career spanning forty-two years, he published more than three ...
  • Clues on the X-ray emission mechanism of blazars PKS 2155−304 and 3C 454.3 through polarization studies 
    Bharathan, Athira M; Stalin, C. S; Sahayanathan, S; Mathew, B (Elsevier B.V, 2026-02)
    X-ray polarization measurable with the imaging X-ray Polarimetry Explorer (IXPE) could constrain the long debated leptonic versus hadronic origin for the high energy component in the broad band spectral energy distribution ...
  • Modelling the scattering by porous aggregate dust grains in the far-ultraviolet halos of spica and achernar 
    Choudhury, Nilanjana Dey; Shalima, P; Keerthana, U; Murthy, J (Elsevier B.V, 2026-02)
    Far-Ultraviolet (FUV) halos have been detected around six bright stars by Murthy and Henry (2011) using GALEX observations. These halos are thought to be caused by forward scattering of the starlight by dust grains present ...

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