• An alternative iterative scheme to the full non-LTE transfer problem with coherent scattering in the atom’s frame 

  Lagache, T; Sampoorna, M; Paletou, F (Oxford University Press on behalf of the Royal Astronomical Society, 2025-01)

  We propose an alternative scheme for the computation of the so-called ‘full non-LTE’ (non-local thermodynamic equilibrium) radiative transfer problem, assuming coherent scattering in the atom’s frame. This generalized ...
• A new broad-band atmospheric dispersion corrector for HROS-TMT 

  Manjunath, B; Sivarani, T; Wehbe, Bachar; Hasan, Amirul; Chandra, B; Divakar, D. K; Unni, Athira; Parvathy, M; Surya, Arun; Saraf, Pallavi (Oxford University Press on behalf of the Royal Astronomical Society, 2025-01)

  Atmospheric dispersion causes light from celestial objects with different wavelengths to refract at varying angles as it passes through Earth’s atmosphere. This effect results in an elongated image at the focal plane of a ...
• Star formation in interacting galaxy systems: UVIT imaging of NGC 7252 and NGC 5291 

  Santhosh, Geethika; Rajalakshmi, Rakhi; George, K; Subramanian, S; Indulekha, K (Cambridge University Press on behalf of Astronomical Society of Australia, 2025-04)

  Interactions play a significant role in the formation and evolution of galaxies in the Universe. The galaxy systems, NGC 7252 and NGC 5291, are two nearby interacting systems that are hosting tidal dwarf galaxies (TDGs) ...
• Magnetic fields on different spatial scales of the L328 cloud 

  Gupta, Shivani; Archana Soam; Karoly, Janik; Lee, Chang Won; Maheswar, G (Oxford University Press on behalf of Royal Astronomical Society, 2025-06)

  L328 core has three sub-cores S1, S2, and S3, among which the sub-core S2 contains L328-IRS, a Very Low Luminosity Object, which shows a CO bipolar outflow. Earlier investigations of L328 mapped cloud/envelope (parsec-scale) ...
• Comprehensive variability analysis of blazars using Fermi light curves across multiple timescales 

  Shah, Zahir; Dar, Athar A; Akbar, Sikandar; Peer, Anjum; Malik, Zahoor; Manzoor, Aaqib; Ahanger, Sajad; Tantry, Javaid; Nazir, Zeeshan; Bose, D; Magray, Mushtaq (American Physical Society, 2025-06-15)

  In this study, we conducted a systematic analysis of long-term Fermi-LAT γ-ray data for a sample of blazars, including flat spectrum radio quasars (FSRQs), BL Lacertae objects (BL Lacs), and blazar candidates of unknown ...
• Discovery of changing-look behavior in AGN NGC3822: A long-term multiwavelength study 

  Layek, Narendranath; Nandi, Prantik; Naik, Sachindra; Chhotaray, Birendra; Jana, Arghajit; Dash, Priyadarshee P; Neeraj, Kumari; Stalin, C. S; Bandari, Srikanth; Muneer, S (American Astronomical Society, 2025-12-01)

  We present a comprehensive long-term multiwavelength study of the active galactic nucleus NGC 3822, based on 17 yr (2008─2025) of X-ray, ultraviolet (UV), and optical observations. The data set includes observations from ...
• An intense geomagnetic storm originated from stealth coronal mass ejection: Remote and in situ observations by near radially aligned spacecraft 

  Vemareddy, P; Selva Bharathi, K (American Astronomical Society, 2025-11-20)

  We investigate the solar origin and heliospheric evolution of an intense geomagnetic storm that occurred on 2023 March 23─24. Despite multiple candidate coronal mass ejections (CMEs) observed between March 19 and 21, a ...
• A kinematic and structural study of young open clusters in the Milky Way galaxy using Gaia DR3 catalogue 

  Harsha, K. H; Subramaniam, A; Dhanush, S. R; Hariharan, D. S (Springer Nature, 2025-12)

  We aim to identify the cluster members, estimate cluster properties, study the dynamical state of the clusters as a function of mass, trace the existence of dynamical effects in massive stars, and check for spatial patterns ...
• On-axis afocal telescopes as framework for Cubesat based astronomical imagers and slit-less spectrographs 

  Mishra, Anwesh Kumar; Banerjee, Gourav; Mohan, Rekhesh; Maheswar, G (Springer Nature, 2025-12)

  CubeSats present unique opportunities for observational astronomy in the modern era. They are useful in observing difficult-to-access wavelength regions and long-term monitoring of interesting astronomical sources. However, ...
• 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, ...

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