IIAP Publications: Recent submissions

  • Tidal tails in open clusters: Morphology, binary fraction, dynamics, and rotation 
    Sharma, Ira; Jadhav, Vikrant; Subramaniam, A; Wirth, Henriette (EDP Sciences, 2025-12)
    Context. This research presents unsupervised machine learning and statistical methods to identify and analyze tidal tails in open star clusters using data from the Gaia DR3 catalog. ...
  • Investigating the impacts of AGN activities on dwarf galaxies with FAST H I observations 
    Chen, Hong Ying; Tsai, Chao Wei; Zuo, Pei; Yu, Niankun; Wang, J; Zhang, Kai; Li, Guodong; Chandola, Yogesh; Zheng, Zheng; Wu, Jingwen; Li, Di; Bao, Lulu (Oxford University Press on behalf of Royal Astronomical Society, 2025-12)
    We present the results of H I line observations towards 26 active galactive nucleus (AGN)-hosting and one star-forming dwarf galaxies ( M∗<10 9.5M⊙) with the 19-beam spectral line receiver of FAST at 1.4 GHz. Our FAST ...
  • Photon region boundary for stationary axisymmetric black holes 
    Padhye, Prasad; Kajol, P; Kolekar, Sanved (American Physical Society, 2025-12-15)
    The black hole shadow is fundamentally connected to the structure of light rings and the photon region in the background geometry. We investigate the photon region boundary in a generic asymptotically flat, stationary, ...
  • Magnetic fields in the bones of the Milky Way 
    Stephens, Ian W; Coude, Simon; Myers, Philip C; Zucker, Catherine; Jackson, James M; Andersson, B -G; Smith, Rowan; Archana Soam; Sanhueza, Patricio; Hogge, Taylor; Smith, Howard A; Novak, Giles; Sadavoy, Sarah; Pillai, Thushara; Li, Zhi Yun; Looney, Leslie W; Sugitani, Koji; Guzman, Andres E; Goodman, Alyssa; Kusune, Takayoshi; Zhang, Miaomiao; Karnath, Nicole; Marin, Jessy (American Astronomical Society, 2025-12-20)
    Stars primarily form in galactic spiral arms within dense, filamentary molecular clouds. The largest and most elongated of these molecular clouds are referred to as “bones,” which are massive, velocity-coherent filaments ...
  • H I 21 cm absorption associated with foreground galaxies on top of Quasars 
    Guha, Labanya Kumar; Srianand, Raghunathan; Dutta, Rajeshwari (American Astronomical Society, 2025-12-01)
    A systematic search for H I 21 cm absorption in quasar─galaxy pairs (QGPs) provides a powerful means to map the distribution of cold gas around high-redshift star-forming galaxies. Fiber spectroscopy of high-redshift quasars ...
  • Survival of the accretion disk in LMC recurrent nova 1968-12a: UV–X-ray case study of the 2024 eruption 
    Basu, Judhajeet; Anupama, G. C; Ness, J.-U; Singh, K. P; Barway, Sudhanshu; Chamoli, Shatakshi (American Astronomical Society, 2025-12-01)
    We report on UV and X-ray observations of the 2024 eruption of the recurrent nova LMCN 1968-12a, a rapidly recurring extragalactic system with a ∼4.3 yr recurrence period and a massive white dwarf. The eruption was discovered ...
  • Spectroscopic reverberation mapping for SARM: The case of Mrk 1048 and Mrk 618 
    Pandey, Shivangi; Rakshit, Suvendu; Muneer, S; Jose, Jincen; Tomar, Ashutosh; Li, Yan-Rong; Wang, Jian-Min; Stalin, C. S; Woo, Jong-Hak; Petrov, R. G; Leftley, James; Honig, Sebastian F; Mandal, A. K; Ubarhande, Tushar; Wang, Shu; Brotherton, Michael; Gupta, Archana (American Astronomical Society, 2025-12-10)
    Robust extragalactic distance measurements are crucial for resolving the persistent discrepancy in the value of the Hubble constant (H0). Active galactic nuclei (AGNs), through their compact and variable broad-line regions, ...
  • Unbound tails and compressed heads: A JCMT study of the SFO 38 cloud 
    Porel, Puja; Archana Soam; Karoly, Janik; Chung, Eun Jung; Lee, Chang Won; Kim, Shinyoung; Gupta, Shivani; Sharma, Neha (American Astronomical Society, 2025-12-10)
    SFO 38, located in the Cepheus molecular cloud within the northern part of the H II region IC 1396, is shaped by intense ultraviolet (UV) radiation from the nearby O6.5V-type star HD 206267 and represents a classic example ...
  • Two decades of dust evolution in SN 2005af through JWST, spitzer, and chemical modeling 
    Sarangi, Arkaprabha; Zsiros, Szanna; Szalai, Tamas; Martinez, Laureano; Shahbandeh, M; Fox, O. D; Van Dyk, S. D; Filippenko, A. V; Bersten, M. C; de Looze, Ilse; Ashall, Chris; Temim, Tea; Jencson, Jacob E; Rest, Armin; Milisavljevic, D; Dessart, Luc; Dwek, Eli; Smith, Nathan; Tinyanont, S; Brink, Thomas G; Zheng, W; Clayton, G. C; Andrews, Jennifer E (American Astronomical Society, 2025-11-01)
    The evolution of dust in core-collapse supernovae (SNe), in general, is poorly constrained owing to a lack of infrared observations a few years after explosion. Most theories of dust formation in SNe heavily rely only on ...
  • DESI results: Hint towards coupled dark matter and dark energy 
    Chakraborty, Amlan; Chanda, Prolay; Das, Subinoy; Dutta, Koushik (IOP Publishing, 2025-11)
    We investigate a scenario where a dark energy quintessence field ϕ with positive kinetic energy is coupled with dark matter. With two different self-interaction potentials for the field and a particular choice of the ...
  • Polar filaments capture high-latitude solar poloidal field interactions and can foretell the future sunspot cycle amplitude before polar field precursors 
    Routh, Srinjana; Pal, Shaonwita; Nandy, D; Chatterjee, Subhamoy; Banerjee, D; Khan, Mohd. Saleem (American Astronomical Society, 2025-11-10)
    Polar fields at the minimum of a sunspot cycle—which are a manifestation of the radial component of the Sun’s poloidal field—are deemed to be the best indicator of the strength of the toroidal component and hence, the ...
  • The most luminous known fast blue optical transient at2024wpp: Unprecedented evolution and properties in the X-rays and radio 
    Nayana, A. J; Margutti, R; Wiston, Eli; Laskar, T; Migliori, Giulia; Chornock, R; Timothy, J. G; LeBaron, Natalie; Hajela, Aprajita; Christy, Collin T; Sfaradi, Itai; Tsuna, Daichi; Aspegren, Olivia; Colle, Fabio De; Metzger, B. D; Lu, Wenbin; Beniamini, Paz; Kasen, D; Berger, E; Grefenstette, Brian W; Alexander, Kate D; Anupama, G. C; Coppejans, D. L; Cruz, Luigi F; DeBoer, David R; Drout, Maria R; Farah, Wael; Huang, Xiaoshan; Jacobson-Galan, W. V; Milisavljevic, D; Pollak, Alexander W; Roth, Nathan J; Sears, Huei; Siemion, Andrew; Sheikh, Sofia Z; Steiner, James F; Vurm, Indrek (American Astronomical Society, 2025-11-01)
    We present X-ray (0.3─79 keV) and radio (0.25─203 GHz) observations of the most luminous fast blue optical transient (LFBOT) AT 2024wpp at z = 0.0868, spanning 2─280 days after first light. AT 2024wpp shows luminous (LX ≍ ...
  • Modeling the cosmic ultraviolet background at the north galactic pole 
    Murthy, J (Springer Nature, 2025-12)
    I explore models of the dust-scattered component of the cosmic ultraviolet background (CUVB) at the north galactic pole (NGP) to develop a framework for calculating the dust-scattered light as a function of the optical ...
  • SN 2021tsz: A luminous, short photospheric phase Type II supernova in a low-metallicity host 
    Dastidar, R; Pignata, G; Dukiya, N; Misra, K; Howell, D. A; Singh, Mridweeka; Gutierrez, C. P; Pellegrino, C; Kumar, A; Ayala, B; Gangopadhyay, A; Newsome, M; Padilla Gonzalez, E; Bostroem, K. A; Hiramatsu, D; Terreran, G; McCully, C (EDP Sciences, 2025-11)
    We present the analysis of the luminous Type II Supernova (SN) 2021tsz, which exploded in a low-luminosity galaxy. It reached a peak magnitude of −18.88 ± 0.13 mag in the r band and exhibited an initial rapid decline of ...
  • Thermal and turbulence characteristics of fast and slow coronal mass ejections at 1 AU 
    Khuntia, Soumyaranjan; Mishra, Wageesh (Springer Nature, 2025-12)
    Understanding thermal and turbulence properties of interplanetary coronal mass ejections (ICMEs) is essential for analysing their evolution and interactions with the surrounding medium. This study explores these characteristics ...
  • Kinematics of the lens host S0 galaxy NGC 1553: Role of secular processes 
    Keshri, Saili; Barway, Sudhanshu; Combes, Francoise (EDP Sciences, 2025-11)
    We investigated the central structure of the S0 galaxy NGC 1553, to understand its origin and the underlying dynamical processes that shape it. The high-resolution integral field spectroscopic data from the Multi Unit ...
  • Asteroseismology of carbon-deficient red giants: Merger products of hierarchical triple systems? 
    Maben, Sunayana; Campbell, S. W; Bedding, T. R; Zhao, Gang; Howell, Madeline; Bharat Kumar, Y; Reddy, B. E (American Astronomical Society, 2025-11-20)
    Carbon-deficient giants (CDGs) are a rare and chemically peculiar class of stars whose origins remain under active investigation. We present an asteroseismic analysis of the entire known CDG population, selecting 129 stars ...
  • Imprints of stellar feedback on magnetic fields in the iris nebula NGC 7023 
    Sharma, Ekta; Pattle, Kate; Li, Di; Lee, Chang Won; Maheswar, G; Ching, Tao-Chung; Tahani, Mehrnoosh; Kim, Shinyoung (American Astronomical Society, 2025-11-20)
    We present 850 μm polarized continuum observations carried out using SCUBA-2/POL-2 on the James Clerk Maxwell Telescope toward a reflection nebula, NGC 7023. The nebula is powered by the Herbig Ae Be star HD 200775 and ...
  • On the origin of neutron-capture elements in r-I and r-II stars: A differential-abundance analysis 
    Saraf, Pallavi; Sivarani, T; Beers, Timothy C; Hirai, Yutaka; Tanaka, Masaomi; Allende Prieto, Carlos; Karinkuzhi, D (American Astronomical Society, 2025-11-20)
    We present a strictly line-by-line differential analysis of a moderately r-process-enhanced star (r-I: HD 107752) with respect to a strongly r-process-enhanced star (r-II: CS 31082-0001) to investigate the possible ...
  • Evidence for in-situ acceleration of relativistic particles in the wings of X-shaped radio galaxies 
    Patra, Dusmanta; Gopal-Krishna; Joshi, Ravi (American Astronomical Society, 2025-11-20)
    We report evidence for in-situ acceleration/reacceleration of relativistic particles in 11 radio wings out of a total of 68 wings sufficiently well-resolved for spectral mapping, which belong to our sample of 40 X-shaped ...

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