IIAP Publications: Recent submissions

  • Magnetic topology dependence of ionizing electrons on the Martian nightside ionosphere 
    Sarkar, Arnob; Rao, N.V; Pavan, D. G; Kadhane, Umesh R (Elsevier B.V., 2025-07-15)
    The interaction between the solar wind and Martian crustal magnetic fields plays a significant role in shaping electron precipitation in the ionosphere, particularly on the nightside. Using five years of data from the Mars ...
  • Characterization of aerosol optical and radiative properties at Leh, located over the climate sensitive Hindu Kush Himalayan region using sky radiometer observation 
    Shantikumar, N. S; Mukhopadhyay, Swagata; Madhavan, B. L; Srivastava, A. K; Sharma, Som K; Singh, Amarendra; Jorphel, Sonam; Angchuk, D; Mahay, T. T (Elsevier B.V, 2025-07-15)
    Aerosol optical and radiative properties over the Leh Ladakh, located in the climate sensitive Hindu Kush Himalayan region are examined using one year measurements from a newly installed sky radiometer from July 2023 ...
  • Low-velocity precessing jets can explain observed morphologies in the twin radio galaxy TRGJ104454+354055 
    Mondal, Santanu; Giri, Gourab; Joshi, Ravi; Wiita, P. J; Krishna, G; Ho, Luis C (American Astronomical Society, 2025-07-10)
    Our understanding of large-scale radio jets in merger systems has been drastically improved in the era of the Very Large Array, Very Long Baseline Array/European VLBI Network, upgraded Giant Metrewave Radio Telescope, and ...
  • Interpreting the spectrotemporal properties of the black hole candidate swift J151857.0-572147 during its first outburst in 2024 
    Chatterjee, Kaushik; Suribhatla, S. Pujitha; Mondal, Santanu; Singh, Chandra B (American Astronomical Society, 2025-07-01)
    The transient Galactic black hole candidate Swift J151857.0-572147 went through an outburst in 2024 March for the first time. Using publicly archived Insight-HXMT data, we have analyzed the timing and spectral properties ...
  • A pilot method to determine the high mass end of the stellar initial mass function in galaxies using UVIT, Hα-MUSE observations and applied to NGC 628 
    Amrutha, S; Mousumi Das (American Astronomical Society, 2025-07-01)
    We present a pilot method to estimate the high-mass initial mass function (IMF) across the arm, interarm, and spur regions in galaxies and apply it to NGC 628. We extracted star-forming complexes (SFCs) from the Hα Very ...
  • AstroSat/UVIT study of NGC 663: First detection of Be+sdOB systems in a young star cluster 
    Nedhath, Sneha; Rani, Sharmila; Subramaniam, A; Pancino, Elena (EDP Sciences, 2025-07)
    Context. Be stars are rapidly rotating stars surrounded by a disc; however, the origin of these stars remains unclear. Mass and angular momentum transfer in close binaries account for the rapid rotation of a major fraction ...
  • Spectroscopic quasar anomaly detection (SQuAD): I. Rest-frame UV spectra from SDSS DR16 
    Tiwari, A; Vivek, M (EDP Sciences, 2025-07)
    Aims. We present the results of applying anomaly detection algorithms to a quasar spectroscopic subsample from the SDSS DR16 quasar catalog, covering the redshift range of 1.88 ≤ z ≤ 2.47. Methods. A principal component ...
  • Radiative-transfer models for dusty Type II supernovae 
    Dessart, Luc; Hillier, D. J; Sarangi, Arkaprabha (EDP Sciences, 2025-05)
    Dust is expected to form on a year timescale in core-collapse supernova (SN) ejecta. Its existence is revealed through an infrared brightening, an optical dimming, or a blue-red emission-line profile asymmetry. To investigate ...
  • Circumgalactic medium of quasar host galaxies at 0.4 ⩽ z ⩽ 0.8 probed by strong Mg II absorption 
    Sharma, Paryag; Srianand, R; Chand, H; Guha, Labanya Kumar (Oxford University Press on behalf of Royal Astronomical Society, 2025-07)
    Using a sample of 166 projected quasar pairs, we investigate the influence of active galactic nuclei on the circumgalactic medium of the quasar host galaxies probed using strong Mg II absorption (i.e. W2796 ≥ 1 Å) at impact ...
  • The Hα line as a probe of chromospheric magnetic fields 
    Mathur, Harsh; Joshi, Jayant; Moe, Thore Espedal; Pereira, Tiago M. D; Nagaraju, K (American Astronomical Society, 2025-07-10)
    We explore the diagnostic potential of the Hα line for probing the chromospheric magnetic field using a realistic 3D radiative magnetohydrodynamic (rMHD) model. The Stokes profiles of the Hα line are synthesized through full ...
  • On the magnetic reconnection and its properties during a flare using a magnetohydrodynamics simulation 
    Nayak, Sushree S; Hu, Qiang; He, Wen; Kumar, Sanjay; Bhattacharyya, R (Springer Nature, 2025-06)
    We study the magnetic reconnection during a flare by investigating flare ribbon dynamics using observations and data-constrained magnetohydrodynamics (MHD) simulation. In particular, we estimate the reconnection flux and ...
  • Large cold dust reservoir revealed in transitional SN Ib 2014C by James Webb Space Telescope mid-infrared spectroscopy 
    Tinyanont, S; Fox, O. D; Shahbandeh, M; Temim, Tea; Williams, Robert; Wangnok, Kittipong; Rest, Armin; Lau, Ryan M; Maeda, K; Jencson, Jacob E; Auchettl, Katie; Filippenko, A. V; Larison, Conor; Ashall, Chris; Brink, Thomas G; Davis, Kyle W; Dessart, Luc; Foley, Ryan J; Galbany, L; Grayling, Matthew; Johansson, J; Kasliwal, Mansi M; Lane, Zachary G; LeBaron, Natalie; Milisavljevic, D; Rho, Jeonghee; Sakon, I; Sarangi, Arkaprabha; Szalai, Tamas; Taggart, Kirsty; Van Dyk, S. D; Wang, Qinan; Yang, Yi; Zheng, W; Zsiros, Szanna (American Astronomical Society, 2025-06-01)
    Supernova (SN) 2014C is a rare transitional event that exploded as a hydrogen-poor, helium-rich Type Ib SN and subsequently interacted with a hydrogen-rich circumstellar medium (CSM) a few months postexplosion. This unique ...
  • Doppler shifted transient sodium detection by KECK/HIRES 
    Unni, Athira; Oza, Apurva V; Hoeijmakers, H. Jens; Seidel, Julia V; Sivarani, T; Schmidt, Carl A; Kesseli, Aurora Y; Kleer, Katherine de; Baker, Ashley D; Gebek, Andrea; Westram, Moritz Meyer zu; Fisher, Chloe; Sallum, Steph; Manjunath, B; Bello-Arufe, Aaron (Oxford University Press on behalf of Royal Astronomical Society, 2025-06)
    We carried out the first high-resolution transit observations of the exoplanet WASP-49 Ab with Keck/HIRES. Upon custom wavelength calibration we achieve a Doppler RV precision of < 60 ms−1 . This is an improvement in ...
  • Computations of eclipses from 14th-century manuscript Ekanathakarana 
    Shylaja, B. S; Shubha, B. S (Springer Nature, 2025-06)
    The procedures followed for computations of eclipses in the classical treatises are best understood with a practical demonstration of the technique. Here, we have studied manuscripts describing the computations. These are ...
  • New age observing facilities for Indian astronomy: 2020–2035 
    Ramya, S; Roy, Jayanta; Reddy, Eswar; Anupama, G. C; Banyal, R. K; Bhalerao, Varun; Bhattacharyya, Subir; Buch, Kaushal Dipak; Eswaraiah, Chakali; Chitnis, V. R; Datta, Abhirup; Godambe, Sagar; Maheswar, G; Kale, Ruta; Lal, D. V; Mallick, K. K; Majumdar, P; Mitra, Sanjit; Oberoi, Divya; Mohanty, Pravata; Mookerjea, B; Ojha, D. K; Dewangan, Lokesh; Jose, J; Ninan, J. P; Rao, Mayuri Sathyanarayana; Pahari, Mayukh; Naik, Sachindra; Jain, Pankaj; Prabhu, T. P; Ramaprakash, A. N; Rana, Vikram; Ramesh, R; Ravindra, B; Sankarasubramanian, K; Ramadevi, M. C; Narendranath, S; Archana Soam; Vadawale, S. V; Vadamattom, Veena; Girish, V; Yadav, K. K; Singh, Krishna Kumar; Mankuzhiyil, Nijil; Bharat Kumar, Y; Arun Babu, K. P (Springer Nature, 2025-06)
    In this article, we present the current state of observing facilities available for Indian astronomers in various wavelength bands existing in the country. We also mention a few state-of-the-art astronomical facilities ...
  • The JCMT BISTRO-3 survey: Variation of magnetic field orientations on parsec and subparsec scales in the massive star-forming region G28.34+0.06 
    Hwang, Jihye; Pattle, Kate; Lee, Chang Won; Karoly, Janik; Kim, Kee-Tae; Kim, Jongsoo; Liu, Junhao; Qiu, Keping; Lyo, A-Ran; Eden, David; Koch, Patrick M; Arzoumanian, Doris; Sharma, Ekta; Poidevin, Frederick; Johnstone, Doug; Coude, Simon; Tahani, Mehrnoosh; Ward-Thompson, Derek; Archana Soam; Kang, Ji-hyun; Hoang, Thiem; Kwon, Woojin; Ngoc, Nguyen Bich; Chung, Eun Jung; Bourke, Tyler L; Onaka, Takashi; Kirchschlager, Florian; Tamura, Motohide; Kwon, Jungmi; Tang, Xindi; Eswaraiah, Chakali; Liu, Tie; Bastien, Pierre; Furuya, Ray S; Lai, Shih-Ping; Lin, Sheng-Jun; Wang, Jia-Wei; Berry, David (American Astronomical Society, 2025-06-01)
    Magnetic fields play a significant role in star-forming processes on core to clump scales. We investigate magnetic field orientations and strengths in the massive star-forming clump P2 within the filamentary infrared dark ...
  • Galaxies, clusters, and intergalactic medium: A vision document for the Indian Astronomical Community 
    Kale, Ruta; Muzahid, Sowgat; Khaire, V; Roy, Namrata; Das, Sanskriti; Chand, H; Chatterjee, Suchetana; Datta, Abhirup; Mousumi Das; Hota, A; Jog, C. J; Kartha, Sreeja S; Lal, D. V; Mondal, Chayan; Nath, B. B; Choudhury, Prakriti Pal; Paul, Surajit; Sachdeva, Sonali; Sharma, Prateek; Singh, Priyanka; Singh, V; Subramanian, S; Sur, Sharanya (Springer Nature, 2025-12)
    Galaxies, clusters, and the intergalactic medium (IGM) are the essential and interconnected components of the cosmic ecosystem. Galaxies, with their diverse morphologies and stellar populations, are the building blocks of ...
  • Coupling of Alfven and magnetosonic waves in rotating hall magnetoplasmas 
    Misra, Amar P; Dey, Rupak; Krishan, V (American Institute of Physics, 2025-06)
    We study the linear theory of magnetohydrodynamic (MHD) waves, namely, the Alfvén and the fast and slow magnetosonic modes in a rotating Hall-MHD plasma with the effects of the obliqueness of the external magnetic field ...
  • Evolution of the interacting coronal mass ejections that drove the great geomagnetic storm of 10 May 2024 
    Khuntia, Soumyaranjan; Mishra, Wageesh; Agarwal, Anjali (EDP Sciences, 2025-05)
    Context. The arrival of a series of coronal mass ejections (CMEs) at the Earth resulted in a great geomagnetic storm on 10 May 2024, the strongest storm in the last two decades. Aims. We investigated the kinematic and ...
  • Discovery of a kinematically distinct component in the central region of the collisional ring galaxy AM0644-741 
    Mondal, Chayan; Barway, Sudhanshu (EDP Sciences, 2025-05)
    We present the discovery of a peculiar central stellar structure in the collisional ring galaxy AM0644-741 using HST imaging and MUSE integral field unit (IFU) data. We identified two Sérsic components with a Sérsic index ...

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