IIA Institutional Repository: Recent submissions

  • 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 ...
  • Near-sun characteristics of a CME inferred from observations in the 5303 Å coronal emission line 
    Priyal, M; Ramesh, R; Singh, J; Sasikumar Raja, K; Gopalswamy, N (American Astronomical Society, 2025-12-01)
    Using observations of the solar corona in the 5303 Å (Fe XIV) emission line with the Visible Emission Line Coronagraph (VELC) on board Aditya-L1, we estimated the electron density (Ne), thermal energy (ECME), and mass ...
  • Continued radio observations of the persistent radio source associated with FRB 20190520B provide insights into its origin 
    Balasubramanian, Arvind; Bhardwaj, Mohit; Tendulkar, Shriharsh (American Astronomical Society, 2025-12-10)
    Follow-up studies of persistent emission from fast radio burst (FRB) sources are critical for understanding their elusive emission mechanisms and the nature of their progenitors. This work presents new observations of the ...
  • The ALMA-QUARKS survey: Evidence of a candidate high-mass prestellar core aside a bright-rimmed cloud IRAS 18290-0924 
    Yang, Dongting; Liu, Hong-Li; Qin, Sheng-Li; Liu, Tie; Tej, Anandmayee; Zhang, Siju; Liu, Xunchuan; Xu, Feng-Wei; Garay, Guido; Zhu, Lei; Sanhueza, Patricio; Mai, Xiaofeng; Jiao, Wenyu; Goldsmith, Paul F; Dib, S; Garcia, Pablo; Li, Di; He, Jinhua; Yang, A.Y; Gorai, Prasanta; Zhang, Suinan; Zhang, Yankun; Zhou, Jianjun; Juvela, Mika; Chibueze, J. O; Lee, Chang Won; Hwang, Jihye; Bronfman, Leonardo; Tang, Xindi; Archana Soam; Baug, Tapas; Zhang, Yichen; Das, Swagat; Dewangan, Lokesh; Toth, L. Viktor (American Astronomical Society, 2025-12-20)
    Although frequently reported in observations, the definitive confirmation of high-mass prestellar cores has remained elusive, presenting a persistent challenge in star formation studies. Using two-band observational data ...
  • ZTF25abjmnps (AT2025ulz) and S250818k: A candidate superkilonova from a subthreshold subsolar gravitational-wave trigger 
    Kasliwal, Mansi M; Ahumada, Tomas; Stein, Robert; Karambelkar, Viraj; Hall, Xander J; Avinash Singh; Fremling, Christoffer; Metzger, B. D; Bulla, Mattia; Swain, Vishwajeet; Antier, S; Pillas, Marion; Busmann, Malte; Freeburn, James; Karpov, S; Bochenek, Aleksandra; O’Connor, Brendan; Perley, Daniel A; Akl, Dalya; Anand, Shreya; Toivonen, Andrew; Rose, Sam; Jegou du Laz, Theophile; Liu, Chang; Das, Kaustav K; Chaudhary, Sushant Sharma; Barna, Tyler; Saikia, Aditya Pawan; Andreoni, Igor; Bellm, Eric C; Bhalerao, Varun; Cenko, S. Bradley; Coughlin, Michael W; Gruen, Daniel; Kasen, D; Miller, Adam A; Nissanke, Samaya; Palmese, Antonella; Sollerman, Jesper; Sravan, Niharika; Anupama, G. C; Banerjee, Smaranika; Barway, Sudhanshu; Bloom, Joshua S; Cabrera, Tomas; Chen, Tracy X; Copperwheat, Christopher M; Corsi, Alessandra; Dekany, Richard; Earley, Nicholas; Graham, Matthew J; Hello, Patrice; Helou, George; Hu, Lei; Kini, Yves; Mahabal, Ashish A; Masci, Frank J; Mohan, Tanishk; Pletskova, Natalya; Purdum, Josiah; Qin, Yu-Jing; Rehemtulla, Nabeel; Salgundi, Anirudh; Wang, Yuankun (American Astronomical Society, 2025-12-20)
    On 2025 August 18, the LIGO–Virgo–KAGRA collaboration reported gravitational waves from a subthreshold binary neutron star merger. If astrophysical, this event would have a surprisingly low chirp mass, suggesting that at ...
  • Observed Joy’s law of bipolar magnetic region tilts at emergence supports the thin Flux tube model 
    Sreedevi, Anu; Karak, B. B; Jha, Bibhuti K; Gupta, Rambahadur; Banerjee, D (American Astronomical Society, 2025-12-01)
    Bipolar sunspots, or more generally, bipolar magnetic regions (BMRs), are the dynamic magnetic regions that appear on the solar surface and are central to solar activity. One striking feature of these regions is that they ...
  • Investigating the bulge morphology of dual AGN host galaxies from the GOTHIC survey 
    Nehal, C. P; Mousumi Das; Barway, Sudhanshu; Combes, Francoise; Biswas, Prerana; Bhattacharya, Anwesh; Saha, Snehanshu (Oxford University Press on behalf of Royal Astronomical Society, 2025-12)
    We present a structural analysis of bulges in dual active galactic nuclei (AGNs) host galaxies. Dual AGNs arise in galaxy mergers where both supermassive black holes are actively accreting. The AGNs are typically embedded ...
  • Classification of global aerosol types and its radiative effects using Aerosol Robotic Network (AERONET) data 
    Mukhopadhyay, Swagata; Shantikumar, N. S; Amoghavarsha, A. V; Madhavan, B. L; Eck, Thomas F; Dumka, U. C; Khatri, Pradeep; Gupta, Pawan (Elsevier B.V., 2025-12-01)
    The present study performed classification global aerosols based on particle linear depolarization ratio (PLDR) and single scattering albedo (SSA) provided from AErosol RObotic NETwork (AERONET) Version 3.0 and Level 2.0 ...
  • 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 ≍ ...

Search DSpace

Browse

My Account