• Estimation of polar magnetic fields using Ca II K polar network as a proxy 

  Mishra, Dibya Kirti; Jha, Bibhuti K; Chatzistergos, Theodosios; Ermolli, Ilaria; Banerjee, D; Khan, M. Saleem (Cambridge University Press on behalf of International Astronomical Union, 2024-08)

  The polar magnetic field plays a crucial role in the solar dynamo model and contributes to predicting future solar cycles. However, continuous and direct measurements of this polar field have been available only since 1976, ...
• Exploring the variation in the dynamic rotation profile of the hotter solar atmosphere using mutliwavelength data 

  Routh, Srinjana; Jha, Bibhuti K; Mishra, Dibya Kirti; Van Doorsselaere, T; Pant, V; Chatterjee, Subhamoy; Banerjee, D (Cambridge University Press on behalf of The International Astronomical Union, 2024-08)

  The global rotational profile of the solar atmosphere and its variation at different layers, although crucial for a comprehensive understanding of the dynamics of the solar magnetic field, has been a subject to contradictory ...
• CEMP (s- and r/s) stars: s- and i-process and implications for galactic chemical evolution 

  Goswami, A; Goswami, P. P; Shejeelammal, J; Meenakshi, P (Cambridge University Press on behalf of The International Astronomical Union, 2024-01)

  Low-mass and low-metallicity Aymptotic Giant Branch (AGB) stars contribute to the chemical evolution of heavy elements through slow (s) and intermediate (i) neutron-capture processes. During AGB stars evolution the i-process ...
• Measures of luminous and dark matter in galaxies across time 

  Freundlich, Jonathan; Sharma, Gauri; Thater, Sabine; Mousumi Das; Famaey, Benoit; Freese, Katherine; Korsaga, Marie; Lavalle, Julien; Ma, Chung Pei; Mogotsi, Moses; Popescu, Cristina; Rizzo, Francesca; Sales, Laura V; Sanchez Conde, Miguel A; Van de Ven, Glenn; Zhao, Hongsheng; Zocchi, Alice (Cambridge University Press on behalf of The International Astronomical Union, 2024-08)

  Dark matter is one of the pillars of the current standard model of structure formation: it is assumed to constitute most of the matter in the Universe. However, it can so far only be probed indirectly through its gravitational ...
• The role of helicity injection and poloidal magnetic field in a breakout CME 

  Vashishtha, Nitin; Pant, V; Talpeanu, Dana-Camelia; Banerjee, D; Rastogi, Shantanu (Cambridge University Press on behalf of International Astronomical Union, 2024-12)

  Coronal mass ejections (CMEs) profoundly impact space weather, necessitating a comprehensive understanding of their initiation and evolution in the solar corona. Solar Cycle 24 exhibited reduced sunspot numbers and ...
• Design of a three-lens wide field corrector with aspherical surfaces for the 2.34-m VBT 

  Singh, Nitish; Sriram, S; Bharat Kumar, Y (SPIE - Optical System Design, 2026-04)

  We are developing a compact three-element Wide Field Corrector (WFC) with spherical and aspherical lenses for the 2.34 m Vainu Bappu Telescope (VBT) to enhance its field coverage for imaging and spectroscopic applications. ...
• 1.5m aluminization plant calibration for 1m Carl Zeiss telescope mirror realuminization 

  Remya, B. S; Sriram, S; Singh, Nitish (SPIE - Optical System Design, 2026-04)

  The calibration of the 60-inch aluminization chamber is a critical prerequisite for the successful re-aluminization of the 1-meter Carl Zeiss reflector telescope mirror. This process ensures the deposition of a uniform ...
• Estimation of the energy involved in a solar coronal mass ejection using spectroscopic observations in the 5303Å emission line 

  Ramesh, R; Priyal, M; Singh, J; Sasikumar Raja, K; Mishra, Wageesh; Monstein, C (American Astronomical Society, 2026-07-01)

  While the amount of solar coronal energy flux leaving the "quiet" Sun, coronal holes, and active regions has been estimated by many, similar calculations for transients like coronal mass ejections (CMEs) based on observations ...
• On the relationship between solar spicules and propagating coronal disturbances: The role of shocks 

  Chaurasiya, Ravi; Srivastava, Sankalp; Chatterjee, Piyali; Dey, Sahel; Erdelyi, Robertus; Bayanna, A. R (American Astronomical Society, 2026-07-01)

  Spicules and propagating coronal disturbances (PCDs) are ubiquitous dynamic features of the solar atmosphere, yet their physical connection remains an open question of paramount importance to the mass and energy transport ...
• Subluminous type IIP SN 2024abfl as a result of a significantly low-energy Fe-core collapse 

  Teja, Rishabh Singh; Sahu, D. K; Anupama, G. C; Singh, A; Dutta, Amrit; Rameshan, Gitika; Das, Hrishav; Kawabata, K. S; Singh, Mridweeka; Bhalerao, Varun (American Astronomical Society, 2026-07-01)

  We present extensive, well-sampled multiwavelength photometric and low-resolution optical spectroscopic observations of the low-luminosity Type IIP supernova (SN) SN 2024abfl. SN 2024abfl is found to be at the faintest end ...
• BISTRO Survey: Gravity-dominated and magnetically regulated star formation in M17 SW 

  Zhao, Mengke; Qiu, Keping; Kang, Ji-hyun; Tang, Xindi; Whitworth, Anthony; Ward-Thompson, Derek; Onaka, Takashi; Lee, Chang Won; Bourke, Tyler L; Hwang, Jihye; Eden, David; Hoang, Thiem; Tamura, Motohide; Kwon, Jungmi; Priestley, Felix; Kim, Kee-Tae; Arzoumanian, Doris; Francesco, James Di; Eswaraiah, Chakali; Johnstone, Doug; Nguyen, Bich Ngoc; Chen, Zhiwei; Sadavoy, Sarah; Archana Soam; Furuya, Ray; Lai, Shih-Ping; Kwon, Woojin; Bastien, Pierre; Pattle, Kate; Berry, David (American Astronomical Society, 2026-07-01)

  We present high-resolution magnetic field maps of the M17 SW molecular cloud using JCMT 850 μm dust polarization at scale of 14″. The magnetic field exhibits a distinct arc-like structure that encircles three dense clumps ...
• JWST spectroscopy of SNe Ia 2022aaiq and 2024gy: Evidence for enhanced central stable Ni abundance and a deflagration-to-detonation transition 

  Kwok, Lindsey A; Liu, Chang; Jha, Saurabh W; Blondin, Stephane; Larison, Conor; Miller, Adam A; Dai, Mi; Foley, Ryan J; Filippenko, A. V; Andrews, Jennifer E; Andrews, Moira; Auchettl, Katie; Badenes, Carles; Bostroem, K. Azalee; Brink, Thomas G; Koelln, Cristine; Davis, Kyle W; Flors, Andreas; Galbany, L; Graur, Or; Howell, D. A; Kumar, Sahana; Konyves-Toth, Reka; LeBaron, Natalie; Macrie, Colin W; Maeda, K; Maguire, Kate; McCully, Curtis; Retamal, Nicolas Meza; Padilla Gonzalez, E; Pakmor, Rudiger; Pearson, Jeniveve; Piro, Anthony L; Polin, Abigail; Rehemtulla, Nabeel; Cesar, Rojas-Bravo; Sand, D. J; Sangkachan, Chita; Schwab, Michaela; Sears, Huei; Singh, Mridweeka; Subrayan, Bhagya M; Taggart, Kirsty; Temim, Tea; Terwel, Jacco H; Tinyanont, S; Vinko, J; Wang, Xiaofeng; Wheeler, J. C; Yang, Y; Zheng, W (American Astronomical Society, 2026-07-01)

  We present optical + near-infrared + mid-infrared (MIR) observations of the normal Type Ia supernovae (SNe Ia) 2022aaiq and 2024gy in the nebular phase, continuously spanning 0.35─28 μm. Medium-resolution JWST spectroscopy ...
• ALMA-QUARKS view of W49N: Multipolar episodic outflow associated with the most energetic galactic water maser 

  Jiao, Yunfan; Liu, Tie; Jiao, Wenyu; Xu, Feng-Wei; Gu, Qilao; Tang, Xindi; Mai, Xiaofeng; Luo, Qiuyi; Zhang, Siju; Goldsmith, Paul F; Lee, Chang Won; Garay, Guido; Yang, Yuhan; Gorai, Prasanta; Merello, Manuel; Garcia, Pablo; Dib, S; Hwang, Jihye; Hoque, Ariful; Juvela, Mika; Zhang, Yankun; Sanhueza, Patricio; Weng, Jixiang; Kim, Kee-Tae; Das, Swagat; Archana Soam; Baug, Tapas; Zhou, Jianjun; Bronfman, Leonardo; Yang, A.Y; Zhu, Lei (American Astronomical Society, 2026-07)

  We present a detailed investigation of a multipolar episodic molecular outflow in the ministarburst region W49N, which hosts the most luminous water maser in the Galaxy. Using high-resolution ( ∼0.″3 ) Atacama Large ...
• Future null energy violation and minimal dark energy solutions to the Hubble tension 

  Manoharan, Manosh T (Elsevier B. V, 2026-07)

  Few phenomenological extensions of ΛCDM favour higher values of the Hubble parameter without introducing additional degrees of freedom, often at the cost of invoking phantom dynamics. We investigate ─ Phenomenological ...
• Broad-band spectral and temporal study of OP 313 during its 2025 January very high energy flare 

  Manzoor, Aaqib; Ahanger, Sajad; Shah, Zahir; Vivek, M; Malik, Zahoor (Elsevier B.V, 2026-07)

  We present a comprehensive broadband temporal and spectral analysis of the transition blazar OP 313 using Swift and Fermi-LAT observations obtained during its recent very high energy (VHE) flaring activity. The one-day ...
• Ultraviolet variability in radio-loud active galactic nuclei observed by UVIT onboard AstroSat 

  Reshma, M; Stalin, C. S; Mandal, A. K; Gudennavar, S. B; Benedict, Senorita; Joseph, P (Elsevier B.V., 2026-07)

  Radio-loud active galactic nuclei (AGN) are among the most luminous objects in the Universe, emitting radiation from low-energy radio waves to high energy γ-rays. They are well known to exhibit flux variations at nearly ...
• Narrow-line Seyfert 1 galaxies in the dark energy spectroscopic instrument data release 1 

  Paliya, Vaidehi S; Rakshit, S; Dominguez, Alberto; Saikia, D. J; Stalin, C. S (American Astronomical Society, 2026-07)

  Narrow-line Seyfert 1 (NLSy1) galaxies are peculiar active galactic nuclei (AGN) known to exhibit a variety of intriguing observational features from low-frequency radio waves to high-energy γ-rays. As of now, NLSy1 catalogs ...
• A 14-yr-old mystery: The peculiar case of the engine-driven SN 2012ap 

  Sfaradi, Itai; Margutti, R; Chornock, R; Nayana, A. J; Wiston, Eli; De Colle, Fabio; Clarke, T. E; Peters, Wendy M; Beniamini, Paz; Lu, Wenbin; Duran, Rodolfo Barniol; Bietenholz, M; Christy, Collin T; Coppejans, D. L; Drout, Maria R; Ibrahimzade, Dina; Michałowski, M. J; Milisavljevic, D; Omand, Conor M. B; Wang, Yihan; Alexander, Kate D; Badenes, Carles; Bright, J. S; Granot, Jonathan; Hammerstein, Erica; Jacobson-Galan, W. V; LeBaron, Natalie; Murase, Kohta; Rameshan, Gitika; Sears, Huei; Stroh, Michael; Terreran, Giacomo (American Astronomical Society, 2026-07-01)

  We present late-time (δt > 3000 days) optical (Keck), X-ray (Chandra and the Nuclear Spectroscopic Telescope Array), and radio (the Very Large Area, the Atacama Large Millimeter/submillimeter Array, and the Upgraded Giant ...
• Early dark energy beyond slow-roll: Implications for cosmic tensions 

  Sharma, Ravi Kumar; Das, Subinoy; Poulin, Vivian (American Physical Society, 2024-02-15)

  In this work, we explore the possibility that early dark energy (EDE) is dynamical in nature and study its effect on cosmological observables. We introduce a parametrization of the equation of state allowing for an equation ...
• Three-phase evolution of aspect ratio in fast and slow CMEs from the Sun to 1 au 

  Mishra, Wageesh; Agarwal, Anjali; Srivastava, N (Oxford University Press on behalf of Royal Astronomical Society, 2026-07)

  Coronal mass ejections (CMEs) undergo significant geometric evolution as they propagate from the Sun to 1 au, influencing their radial size, expansion, and space weather impact. We investigate the evolution of CME aspect ...

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