IIAP Publications: Recent submissions

  • Challenging classical paradigms: Recurrent nova M31N 2017-01e, a BeWD system in M31? 
    Chamoli, Shatakshi; Basu, Judhajeet; Barway, Sudhanshu; Anupama, G. C; Swain, Vishwajeet; Bhalerao, Varun (American Astronomical Society, 2025-10-01)
    M31N 2017-01e is the second-fastest recurrent nova known, with a recurrence period of 2.5 yr in the Andromeda galaxy (M31). This system exhibits a unique combination of properties: a low outburst amplitude (∼3 mag), starkly ...
  • When the wall fell: Study of polycyclic aromatic hydrocarbons in T chamaeleontis using JWST 
    Arun, R (American Astronomical Society, 2025-10)
    We investigate the polycyclic aromatic hydrocarbon (PAH) emission features of T Cha, a G8-type T Tauri star that has exhibited “seesaw”-type mid-infrared continuum variability over nearly two decades due to the destruction ...
  • A tale of three cataclysmic variables with distinct superhumps 
    Joshi, Arti; Tappert, C; Catelan, Marcio; Schmidtobreick, L; Singh, Mridweeka (EDP Sciences, 2025-10)
    Superhumps are among the most commonly observed variable features in the light curves of cataclysmic variables (CVs). To study the superhump behaviour of CVs, we present Transiting Exoplanet Survey Satellite (TESS) ...
  • Long-term monitoring of a dynamically new comet C/2020 V2 (ZTF) 
    Ahuja, Goldy; Aravind, K; Ganesh, S; Hmiddouch, Said; Donckt, Mathieu Vander; Jehin, E; Sahu, D. K; Sivarani, T (Oxford University Press on behalf of Royal Astronomical Society, 2025-10)
    Comet C/2020 V2 (ZTF, Zwicky Transient Facility) is categorized as a dynamically new long-period comet, making its first approach to the inner Solar system. We have observed this comet for around 32 months (from 2022 January ...
  • Polycyclic Aromatic Hydrocarbons in the circumstellar medium of Herbig Ae/Be stars 
    Arun, R; Mathew, Blesson; Shridharan, B; Ujjwal, K; Akhil, Krishna R; Maheswar, G; Kartha, Sreeja S (IOP Publishing, 2025-09)
    We present a comprehensive mid-infrared spectroscopic survey of 124 Herbig Ae/Be stars using newly processed Spitzer/IRS spectra from the newly released CASSISjuice database. Based on prominent dust and molecular signatures ...
  • Inflationary magnetogenesis beyond slow-roll and its induced gravitational waves 
    Atkins, Bill; Chowdhury, Debika; Marriott-Best, Alisha; Tasinato, Gianmassimo (American Physical Society, 2025-09-15)
    The origin of magnetic fields observed on both astrophysical and cosmological scales is a compelling problem that has the potential to shed light on the early Universe. We analytically investigate inflationary magnetogenesis ...
  • Predicting CME speed at 20R⊙ using machine learning approaches 
    Hegde, M (Springer Nature, 2025-09)
    Coronal mass ejections (CMEs) are significant drivers of space weather, and accurately predicting their propagation speed is crucial for mitigating their impact on Earth’s environment. In this study, we leverage machine ...
  • SN 2023vbg: a type IIn supernova resembling sn 2009ip, with a long-duration precursor and early-time bump 
    Goto, Sota; Yamanaka, Masayuki; Nagayama, Takahiro; Maeda, K; Kawabata, Miho; Sahu, D. K; Singh, A; Gangopadhyay, A; Dukiya, Naveen; Misra, Kuntal; Dubey, Monalisa; Ailawadhi, Bhavya (American Astronomical Society, 2025-09-10)
    Type IIn supernovae (SNe) resembling SN 2009ip (09ip-like SNe) originate from the interaction between circumstellar material (CSM) and the ejecta. This subclass not only shares similar observational properties around the ...
  • Transient LoBALs at high velocities: A case of extreme broad absorption line variability in J115636.82+085628.9 
    Aromal, P; Srianand, R; Gallagher, S. C; Vivek, M; Petitjean, P (American Astronomical Society, 2025-09-10)
    We present a multiepoch spectroscopic study of the broad absorption line (BAL) quasar J115636.82+085628.9 (zem = 2.1077), based on five spectra spanning nearly two decades in the observer’s frame. This source exhibits ...
  • B-fields and dust in interstellar filaments using dust polarization (BALLAD-POL). IV.Grain alignment mechanisms in the cocoon nebula (IC 5146) using polarization observations from JCMT/POL-2 
    Pravash, Saikhom; Hoang, Thiem; Archana Soam; Chung, Eun Jung; Diep, Pham Ngoc; Ngoc, Nguyen Bich; Tram, Le Ngoc (American Astronomical Society, 2025-09-01)
    The polarization of starlight and thermal dust emission from aligned nonspherical grains provides a powerful tool for tracing magnetic field morphologies and strengths in the diffuse interstellar medium to star-forming ...
  • Li enrichment in Red Clump Giants: Clues for past binary interaction or merger events 
    Singh, Raghubar; Reddy, B. E; Mallick, Anohita; Zhao, Gang (American Astronomical Society, 2025-09-01)
    To understand the underlying mechanisms of high Li abundances among core He-burning or red clump (RC) giants, we analyzed a sample of 5227 RC giants of mass M < 2 M⊙ using spectra and asteroseismic data. We found 120 RC ...
  • Redshift ∼2.7 is not special comment on the Kolmogorov analysis of JWST deep survey galaxies 
    Joseph, P (EDP Sciences, 2025-09)
    Galikyan et al. (2025, A&A, 696, L21) reported a statistically significant change in galaxy spectral properties at redshift z ' 2.7 based on a Kolmogorov Stochasticity Parameter analysis of JWST spectroscopic data of ...
  • Indian solar and heliospheric physics vision: Fundamental science to a space weather resilient society 
    Nandy, D; Pant, V; Anand, Megha; Athalathil, Jithu J; Awasthi, Arun Kumar; Bane, Kshitij; Banerjee, D; Ravindra, B; Bhaskar, Ankush; Bhattacharyya, R; Bhowmik, Prantika; Chandra, Ramesh; Chatterjee, Piyali; Chatterjee, Subhamoy; Dimri, A. P; Gokani, Sneha A; Hanasoge, S. M; Hazra, S; Jain, Rajmal; Joshi, B; Nagaraju, K; Kansabanik, Devojyoti; Karak, B. B; Kathiravan, C; Khan, Raveena; Krishnan, Hariharan; Kumar, Brajesh; Kumar, Sanjay; Kumari, Anshu; Majumdar, Satabdwa; Mayank, Prateek; Mishra, Sudheer K; Mishra, Wageesh; Mohan, Atul; Mondal, Surajit; Mugundhan, V; Narendranath, S; Oberoi, Divya; Pandya, Megha; Patel, Ritesh; Paul, Arghyadeep; Prasad, A; Sasikumar Raja, K; Rajhans, Abhishek; Ramesh, R; Saha, Chitradeep; Sankarasubramanian, K; Selvakumaran, R; Sharma, Rahul; Sharma, Rohit; Shrivastav, Arpit Kumar; Singh, Nishant; Soni, Shirsh Lata; Srivastava, Abhishek K; Srivastava, Nandita; Tripathi, Durgesh; Uddin, W; Vaidya, Bhargav; Vemareddy, P; Vichare, Geeta; Vigeesh, G; Yadav, Nitin; Yadav, V. K (Springer Nature, 2025-12)
    The Sun is the only star that harbours a planet known to host life. Our home, the Earth, and other solar system planets reside within the heliosphere – the sphere of influence of the Sun. Within this domain, the Sun’s ...
  • Short and intermediate periodicities in Ca II K plage areas as seen in Kodaikanal images for individual cycles from 14 to 22 
    Chowdhury, Partha; Priyal, M; Singh, J; Ravindra, B (Springer Nature, 2025-09)
    We analyze historical Ca II K images from the Kodaikanal Observatory (KO) spanning 1907 to 1996, encompassing Solar Cycles 14 through 22. These digitized images were processed using the Equal Contrast Technique (ECT) to ...
  • X-ray selected broad absorption line quasars in SDSS-V: BALs and non-BALs span the same range of X-ray properties 
    Hiremath, Pranavi; Rankine, Amy L; Aird, James; Brandt, W. N; Hidalgo, Paola Rodriguez; Anderson, S. F; Aydar, Catarina; Ricci, Claudio; Schneider, D. P; Vivek, M; Igo, Zsofi; Morrison, Sean; Salvato, Mara (Oxford University Press on behalf of Royal Astronomical Society, 2025-09)
    Broad absorption line (BAL) quasars are often considered X-ray weak relative to their optical/UV luminosity, whether intrinsically (i.e. the coronal emission is fainter) or due to large column densities of absorbing material. ...
  • Digital micromirror device characterization in optical band for astronomical multi-object spectrograph 
    Sriram, S; Valsan, Vineeth; Remya, B. S; Subramaniam, A; Maheswar, G (Springer Nature, 2025-10)
    The Digital Micromirror Device (DMD), a micro-electro-mechanical system (MEMS) consisting of individually controllable micromirrors, has emerged as a versatile tool for astronomical instrumentation, particularly in ...
  • Which solar latitude follows the sunspot cycle exactly? 
    Raju, K. P (American Astronomical Society, 2025-09-20)
    The large-scale convection in the Sun known as supergranulation is manifested as a network structure on the solar surface. The network cells have an average lifetime of 24 hr, a size of about 30 Mm, and a lane width of ...
  • The detection of teraelectronvolt radiation from a flat-spectrum radio quasar 
    Paliya, Vaidehi S; Bottcher, M; Wani, Kiran; Naseef Mohammed, P. N; Stalin, C. S; Sahayanathan, S; Saikia, D. J; Muneer, S (American Astronomical Society, 2025-09-20)
    The very high-energy (VHE; >100 GeV) radiation carries the signatures of the matter–energy interaction in some of the most extreme astrophysical environments. Considering broad emission line blazars, i.e., flat-spectrum ...
  • Detection of young massive white dwarfs in core-collapsed globular cluster NGC 362 
    Yadav, R. K. S; Dattatrey, Arvind K; Subramaniam, A; Rangwal, Geeta; Singh, Ravi S (American Astronomical Society, 2025-09-10)
    Core-collapsed globular clusters are ideal targets to explore the presence of stellar collision products. Here, we have studied 17 far-UV bright white dwarf (WD) members in the globular cluster NGC 362 using data obtained ...
  • Design and fabrication of a lightweight three-lens corrector system for the 2.34-m Vainu Bappu Telescope 
    Singh, Nitish; Sriram, S; Sethuram, Ramya; Yerra, Bharat Kumar; Burman, Rahuldeb; Nataraj, G; Chethan, C; Kemkar, P. M. M; Sagayanathan, K; Das, Saikat; Francis Xavier Rozario, J (Springer Nature, 2025-08)
    The Vainu Bappu Telescope (VBT) is a 2.34-m reflector, primarily supported on-axis field of view, offering high-resolution and low-to-medium resolution spectroscopic observations in its prime and Cassegrain configurations. ...

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