IIA Institutional Repository: Recent submissions

  • Detection of an optical quasiperiodic oscillation in the Blazar 3C 454.3 
    Dogra, Karan; Gupta, A. C; Raiteri, C. M; Villata, M; Wiita, P. J; Valtonen, Mauri J; Kurtanidze, S. O; Jorstad, S; Bachev, R; Damljanovic, G; Lorey, C; Savchenko, S. S; Vince, O; Abdelkareem, M; Aceituno, F. J; Acosta-Pulido, J. A; Agudo, I; Andreuzzi, G; Ata, S. A; Baida, G. V; Barbieri, L; Blinov, D; Bonnoli, G; Borman, G. A; Carnerero, M. I; Carosati, D; Casanova, V; Chen, W. P; Cui, Lang; Devanand, P. U; Elhosseiny, E. G; Elsaesser, D; Escudero, J; Fan, J. H; Feige, M; Gazeas, K; Grishina, T. S; Gu, Minfeng; Hagen-Thorn, V. A; Hemrich, F; Hsiao, H. Y; Ismail, M; Ivanidze, R. Z; Jovanovic, M. D; Kamel, T. M; Kimeridze, G. N; Kishore, Shubham; Kopatskaya, E. N; Kuberek, D; Kurtanidze, O. M; Kurtenkov, A; Larionov, V. M; Larionova, Elena G; Larionova, L. V; Lin, H. C; Marchini, A; Marinelli, C; Marscher, A; Morcuende, D; Morozova, D. A; Nazarov, S. V; Nikolashvili, M. G; Reinhart, D; Otero-Santos, J; Scherbantin, A; Semkov, E; Shishkina, E. V; Sigua, L. A; Singh, Ajay Kumar; Sota, A; Steineke, R; Stojanovic, M; Strigachev, A; Takey, Ali; Tawfeek, Amira A; Tripathi, Tushar; Troitskiy, I. S; Troitskaya, Y. V; Tsai, An-Li; Vasilyev, A. A; Vrontaki, K; Zhang, Zhongli; Zhovtan, A. V; Zottmann, N; Zuo, Wenwen (American Astronomical Society, 2026-06-01)
    We analyzed 19 yr of R-band data of the blazar 3C 454.3 from the Whole Earth Blazar Telescope archive, along with new data from its members and from public archives such as those provided by the Small and Moderate Aperture ...
  • A unique application of the observation of stars in Indian astronomical texts 
    Shylaja, B. S; Shubha, B. S (National Astronomical Research Institute of Thailand, 2024-09)
    It is very well known that the observation of stars constituted an integral part of Indian astronomical texts. The twenty seven stars along the zodiac were used as references for longitudes. Here we discuss an application ...
  • Variable stars in the field of the galactic globular cluster M71 
    Cortes, C. C; Deras, D; Ferro, A. A; Muneer, S; Fierro, Bustos (Oxford University Press on behalf of Royal Astronomical Society, 2026-06)
    M71 is a nearby, metal-rich globular cluster at low Galactic latitude, where field contamination and spatially variable extinction complicate colour─magnitude diagrams (CMDs) and the identification of cluster member variable ...
  • Observations of circularly polarized radio emission from the "Quiet" sun at frequencies <100 MHz 
    Sayuf, Shaik; Kathiravan, C; Ramesh, R; Barve, Indrajit V; Gireesh, G. V. S; Bane Kshitij, Suhas Trupti (American Astronomical Society, 2026-06-10)
    The presence of the magnetic field makes the solar coronal medium birefringent. Research indicates that an appreciable degree of circular polarization (DCP) can be observed in the thermal radio emission at frequencies <100 ...
  • The CatWISE2020 quasar dipole: A reassessment of the cosmic dipole anomaly 
    Bashir, Masroor; Pravabati, C; Appleby, S (American Astronomical Society, 2026-06-01)
    The Ellis─Baldwin test probes the cosmological principle by comparing the kinematic cosmic microwave background dipole with the Doppler-driven dipole in the number counts of extragalactic radio sources. Recent analysis of ...
  • Age bimodality in pseudo-bulges of barred spiral galaxies: bar-driven evolution across cosmic time 
    Kumar N. R, Kavin; Keshri, Saili; Barway, Sudhanshu (Oxford University Press on behalf of Royal Astronomical Society, 2026-06)
    We investigate the stellar population properties of pseudo-bulges in barred galaxies drawn from the Sloan Digital Sky Survey Data Release 7 to assess how bars regulate central star formation and secular evolution. Our ...
  • H I observations of baryon-dominated dwarf galaxy candidates 
    Mirashi, Atharva; Narayan, Abhinav; Keerthi, K; Kadawla, Saurabh; Raut, Harshal; Patra, Narendra Nath; Roy, Nirupam; Biswas, Prerana; Mousumi Das; Saponara, Juliana (Oxford University Press on behalf of Royal Astronomical Society, 2026-06)
    We present resolved H i observations of six dwarf galaxies drawn from a sample of baryon-dominated dwarf galaxy (BDDG) candidates previously identified using global H i spectra from ALFALFA and optical inclinations from ...
  • Multiwavelength study of blue straggler stars in Tombaugh 2: Evidence for binary mass transfer and constraints on cluster dynamical state 
    Bisht, D; Jiang, Ing-Guey; Belwal, Kuldeep; Cinar, D. C; Dattatrey, Arvind K; Rangwal, Geeta; Raj, A; Biswas, Shraddha; Bisht, Mohit Singh; Durgapal, Alok (American Astronomical Society, 2026-06-01)
    We present a focused multiwavelength study of blue straggler stars (BSSs) in the intermediate-age open cluster Tombaugh 2, located in the outer Galactic disk, to constrain the dominant formation pathways of BSSs in a low ...
  • Statistical study of intense geomagnetic storms and their solar origins over the period 1996 ─ 2025 
    D’Awarave, Arron Augustine; Vemareddy, P (Springer Nature, 2026-06)
    Using in situ geomagnetic and solar wind observations, we present a comprehensive list of intense geomagnetic storms (GMSs) that occurred between 1996 and 2025, covering Solar Cycles (SCs) 23, 24, and the ongoing SC 25. ...
  • Parilekhana: The geometry of celestial events in classical Indian astronomy 
    Shubha, B. S; Shylaja, B. S (National Astronomical Research Institute of Thailand, 2026-04)
    The discussion relevant for explaining any celestial event, was a crucial aspect of all Classical Indian astronomical texts. Each text contained a chapter titled Parilekhana, provided instructions for creating these diagrams. ...
  • A search for successful and choked jets in nearby broad-lined type Ic supernovae 
    O'Dwyer, Tanner; Corsi, Alessandra; Yang, Sheng; Anand, Shreya; Cenko, S. Bradley; Srinivasaragavan, Gokul P; Ho, Anna Y. Q; Sollerman, Jesper; Zhou, Bei; Balasubramanian, Arvind; Chang, Po-Wen; Kamionkowski, Marc; Perley, Daniel A; Laher, Russ R; Murase, Kohta; Masci, Frank J; Kasliwal, Mansi M; Purdum, Josiah; Graham, Matthew J (American Astronomical Society, 2026-05-10)
    The observational link between long gamma-ray bursts (GRBs) and broad-lined stripped-envelope core-collapse supernovae (SNe Ic-BL) is well established. Significant progress has been made in constraining what fraction ...
  • Finding the evolutionary link between ULIRGs and radio galaxies 
    Fida, Ayisha; Nandi, Sumana; Mousumi Das; Rubinur, K; Shanbhog, S; Kharb, P; Dev, Barenya (Oxford University Press on behalf of the Royal Astronomical Society, 2026-07)
    Ultraluminous infrared galaxies (ULIRGs) are the remnants of the major mergers of gas-rich galaxies. They are dusty systems and are extremely luminous in the infrared. Both starbursts and active galactic nucleus (AGN) ...
  • The CAVITY project: The spatially resolved star formation rate of galaxies in voids 
    Conrado, Ana M; Garcia-Benito, Ruben; González Delgado, R. M; Bidaran, Bahar; Courtois, Helene M; Duarte Puertas, S; Espada, Daniel; Jimenez, Andoni; del Moral-Castro, Ignacio; Perez, Isabel; Ruiz-Lara, Tomas; Sanchez-Menguiano, Laura; Torres-Rios, Gloria; Verley, Simon; Argudo-Fernandez, Maria; De Daniloff, Simon B; Florido, Estrella; Gonzalez-Koda, Yllari K; Lugo-Aranda, Alejandra Z; Roman, Javier; Subramanian, S; Villalba-Gonzalez, Pedro; Alcazar-Laynez, Manuel; Hernandez-Sanchez, Monica; Rodríguez Martínez, Mónica; Vasquez-Bustos, Paulo; Blazek, Martin (EDP Sciences, 2026-05)
    The mass in the Universe is distributed non-uniformly, leading to the large scale structure (LSS), characterised by clusters, filaments, walls, and voids. Galaxies in voids have been found to be bluer, of later type, less ...
  • X-Ray and radio campaign of the Z-source GX 340+0. II. the X-Ray polarization in the normal branch 
    Bhargava, Yash; Russell, Thomas D; Ng, Mason; Balasubramanian, Arvind; Zhang, Liang; Ravi, Swati; Jadoliya, Vishal; Bhattacharyya, Sudip; Pahari, Mayukh; Homan, Jeroen; Marshall, H. L; Chakrabarty, Deepto; Carotenuto, Francesco; Kaushik, Aman (American Astronomical Society, 2026-05-20)
    We present the first X-ray polarization measurement of the neutron star low-mass X-ray binary and Z-source, GX 340+0, in the normal branch (NB) using a 200 ks observation with the Imaging X-ray Polarimetric Explorer (IXPE). ...
  • The heritage of astronomical manuscripts in Mysore 
    Shubha, B. S; Shylaja, B. S; Subramaniam, A (IOP Publishing, 2026-05)
    The Mysore region, in south India has a rich heritage of astronomical manuscripts, with a significant collection preserved at the Oriental Research Institute (ORI), University of Mysore and numerous private family collections. ...
  • Unveiling viśvanātha 's mathematical innovations in astronomy manuscripts 
    Shubha, B. S (IOP Publishing, 2026-05)
    Viśvanātha is a well-known name in north India, who wrote many commentaries on different astronomy texts during 16th century. His work showcases methods for achieving accuracy in predictions of astronomical events. His ...
  • Cosmic duets: I. high-spatial resolution spectroscopy of dual and lensed active galactic nuclei with MUSE-NFM 
    Scialpi, M; Mannucci, F; D’Amato, Q; Marconcini, C; Cresci, G; Marconi, A; Ulivi, L; Fumagalli, Michele; Rosati, P; Tozzi, G; Zanchettin, M. V; Battistini, L; Bertola, E; Bracci, C; Carniani, S; Cataldi, E; Ceci, M; Chakraborty, Avinanda; Cicone, C; Ciurlo, A; De Rosa, A; Di Rosa, G; Feltre, A; Ginolfi, M; Lamperti, I; Lusso, E; Moreschini, B; Nardini, E; Parvatikar, M; Perna, M; Rubinur, K; Severgnini, P; Singh, Jasbir; Spingola, C; Venturi, G; Vignali, C; Volonteri, M (EDP Sciences, 2026-05)
    We present the first-year results of the MUSE Large Program "Cosmic Duets", whose goal is to obtain adaptive-optics assisted MUSE observations with a typical angular resolution of 0.1″ − 0.2″ in order to provide integral-field ...
  • Validating a non-conventional method for expansion of coronal mass ejections (CMEs) and investigating the evolution of a CME substructures using solar orbiter and wind observations 
    Agarwal, Anjali; Mishra, Wageesh; Owens, Mathew J; Amerstorfer, T (Wiley on behalf of American Geophysical Union, 2026-05)
    We present a validation of our recently proposed non‐conventional method, Constant Acceleration Accounted Perspective (CAAP), for estimating the instantaneous expansion speed of coronal mass ejection (CMEs), even when only ...
  • LeMMINGs VII: 5-GHz 50-mas e-MERLIN observations of a statistically complete sample of nearby AGNs 
    Williams-Baldwin, D. R. A; Baldi, R. D; Beswick, R. J; McHardy, I. M; Carver, E; Clifford, J; Dullo, B. T; Kill, N; Krishnamoorthi, B; Mutie, I. M; Woodcock, O; Argo, M; Boorman, P; Brinks, E; Fenech, D. M; Knapen, J. H; Mathur, Smita; Moldon, J; Muxlow, T. W. B; Pahari, Mayukh; Wrigley, N. H; Alberdi, A; Baan, W; Beri, Aru; Cheng, X; Green, D. A; Healy, J; Kharb, P; Kording, E; Lucatelli, G; Panessa, F; Puig-Subira, M; Romero-Canizales, C; Saikia, D. J; Saikia, Payaswini; Shankar, F; Sharma, S; Stevens, I. R; Varenius, E (Oxford University Press on behalf of Royal Astronomical Society, 2026-05)
    We present 5 GHz e-MERLIN radio images at 50 mas resolution of the nuclear regions of the Legacy e-MERLIN Multi-band Imaging of Nearby Galaxies survey (LeMMINGs): the deepest statistically complete radio-band survey of the ...
  • UVIT magellanic BRidge analysis (UMBRA) – I. Far-UV–Gaia study of seven star clusters 
    Choudhury, Samyaday; Nayak, Prasanta K; Dhanush, S. R; Sahu, S; de Grijs, R (Oxford University Press on behalf of Royal Astronomical Society, 2026-05)
    We present the first high spatial resolution far-ultraviolet (FUV; F148W) images of seven star clusters in the Magellanic Bridge using the UltraViolet Imaging Telescope (UVIT) on the Indian multiwavelength space observatory ...

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