IIAP Publications: Recent submissions

  • Properties of faint X-ray activity of XTE J1908+094 in 2019 
    Chatterjee, Debjit; Jana, Arghajit; Chatterjee, Kaushik; Bhowmick, Riya; Nath, Sujoy Kumar; Chakrabarti, S. K; Mangalam, A; Debnath, Dipak (Multidisciplinary Digital Publishing Institute, 2021-06)
    We study the properties of the faint X-ray activity of Galactic transient black hole candidate XTE J1908+094 during its 2019 outburst. Here, we report the results of detailed spectral and temporal analysis during this ...
  • Photometric metallicity of galactic RR lyrae stars in the gaia DR3 era 
    Prakash, Mahiguhappriya; Das, Susmita; Singh, H. P; Kumar, Nitesh (Multidisciplinary Digital Publishing Institute, 2026-06)
    RR Lyrae stars are pulsating variables crucial for distance determination and galactic structure studies. Metallicities of fundamental-mode (RRab) RR Lyrae stars are commonly derived from photometry using empirical relations ...
  • Constraining neutron-capture nucleosynthesis from surface chemical composition of chemically peculiar stars: The puzzling case of HE 1005-1439 
    Goswami, A; Choplin, Arthur; Goswami, P. P; Siess, L; Goriely, S (Multidisciplinary Digital Publishing Institute, 2026-06)
    The chemical composition of stellar atmospheres provides a valuable window into the complex processes of stellar nucleosynthesis. Among chemically peculiar cool stars, many objects are the products of mass transfer in ...
  • Bar-driven gas redistribution suppresses star formation in spiral galaxies: Evidence from dust lanes in NGC 3351 
    George, K; Subramanian, S (EDP Sciences, 2026-06)
    We present observational evidence, based on high-resolution imaging from HST, ALMA, and AstroSat/UVIT, that the redistribution of gas driven by the bar in the face-on spiral galaxy NGC 3351 results in suppressed star ...
  • Exploring the stellar streams and satellites around the giant low surface brightness galaxy Malin 1 
    Bustos Espinoza, Roy O. E; Blana, Matias; Galaz, Gaspar; Mora, Marcelo D; Junais; Mousumi Das; Barway, Sudhanshu; Ankit Kumar; Johnston, Evelyn J; Puzia, Thomas (EDP Sciences, 2026-08)
    Context. Giant Low Surface Brightness galaxies (gLSBGs), such as Malin 1, host extended stellar and gaseous discs exceeding 100 kpc in radius. Their formation and evolution remain debated, with interactions with satellite ...
  • SN 2024dy: Dust formation in a long-lived type IIn supernova and constraints on the dust mass 
    Goto, Sota; Yamanaka, Masayuki; Kawabata, K. S; Tanaka, M; Singh, A; Sahu, D. K; Nakaoka, Tatsuya; Gangopadhyay, A; Nagayama, Takahiro; Dukiya, Naveen; Dubey, Monalisa; Misra, K; Ailawadhi, Bhavya (American Astronomical Society, 2026-08-01)
    Type IIn supernovae (SNe) are a subclass of core-collapse SNe powered by interaction between the ejecta and the dense circumstellar material. Among them, long-lived Type IIn events are characterized by luminous, long-duration ...
  • A quiet host in an active planet-forming disk: Optical spectroscopy of WISPIT 2 
    Swastik, C; Bestha, M; Sonith, L. S; Facchini, Stefano; Sivarani, T; Banyal, R. K; Wahhaj, Zahed; Choudhary, Anupma; Maheswar, G; Saraf, Pallavi; Mallick, Anohita; Navaneeth, M. P; Biswas, S; Khushbu, K (EDP Sciences, 2026-08)
    Context. WISPIT 2 is a young pre-main-sequence star hosting a multi-ringed transition disk and two directly imaged protoplanets. One of them, WISPIT 2b, has been confirmed to be accreting. This makes WISPIT 2 the closest ...
  • Origin of the double-peaked narrow emission lines in the optical spectra of X-shaped radio galaxies 
    Ghosh, Prajnadipt; Joshi, Ravi; Yang, Xiaolong; Zhang, Yingkang; Gopal-Krishna; Wiita, P. J; Patra, Dusmanta; Patel, Ankit; Goyal, A; Giri, Gourab; Mondal, Santanu; Negi, Vibhore; Wezgowiec, Marek; Malek, Katarzyna; Wu, Xue-Bing; Ho, Luis C (American Astronomical Society, 2026-08-01)
    We investigate X-shaped radio galaxies (XRGs) with optical double-peaked narrow emission lines (DPNELs) as potential hosts of dual or binary supermassive black holes (SMBHs). Using available optical spectra from the Sloan ...
  • Galaxy groups within voids 
    Argudo-Fernandez, Maria; Torres-Rios, Gloria; Vasquez-Bustos, Paulo; Verley, Simon; Perez, Isabel; Duarte Puertas, S; Jimenez, Andoni; Garcia-Benito, Ruben; Zurita, A; Alcazar-Laynez, Manuel; Bidaran, Bahar; Conrado, Ana M; Espada, Daniel; Florido, Estrella; Gonzalez Delgado, R. M; Hernandez-Sanchez, Monica; del Moral-Castro, Ignacio; Roman, Javier; Sanchez-Menguiano, Laura; Subramanian, S; Villalba-Gonzalez, Pedro (EDP Sciences, 2026-08)
    Context. Despite cosmic voids being vast and almost empty, galaxy aggregations do exist within them, although they are much sparser than in denser regions like walls, filaments, and clusters. The internal matter distribution ...
  • JWST spectra indicate a large mass of postshock dust formed by SN 2010jl 
    Smith, Nathan; Shahbandeh, M; Fox, O. D; Moore, Thomas; Andrews, Jennifer E; Brink, Thomas G; Dwek, Eli; Engesser, M; Filippenko, A. V; Nickson, Bryony; Temim, Tea; Yang, Yi; Zheng, W; Ashall, Chris; Baer-Way, Raphael; Clayton, G. C; Jencson, Jacob E; Johansson, J; Lane, Zachary G; Milisavljevic, D; Rest, Armin; Sarangi, Arkaprabha; Szalai, Tamas; Van Dyk, S. D; Williams, Brian J (American Astronomical Society, 2026-08-01)
    We present new James Webb Space Telescope (JWST) mid-infrared (MIR) spectra and ground-based optical spectra of the lingering source at the position of supernova (SN) 2010jl, which was a relatively nearby superluminous ...
  • Photometric and spectroscopic studies of type Ic supernovae SN 2020akf and SN 2021mxx 
    Kurre, Mulchand; Sahu, K. R; Tiwari, Shrutika; Patel, Yogita; Chakradhari, N. K; Sahu, D. K; Teja, Rishabh Singh; Anupama, G. C; Singh, Mridweeka; Dutta, Anirban; Gangopadhyay, A (American Astronomical Society, 2026-08-10)
    We present a comprehensive analysis of optical photometry and medium-resolution spectroscopy for Type Ic supernovae (SNe) SN 2020akf and SN 2021mxx. Our study covers the evolution of SN 2020akf from −5 to 109 days and SN ...
  • Magnetic evolution of active regions: Formation and eruption of magnetic flux ropes 
    Vemareddy, P (Cambridge University Press on behalf of International Astronomical Union, 2024-12)
    Magnetic flux ropes (FRs) are twisted structures appearing on the sun, predominantly in the magnetically concentrated regions. These structures appear as coronal features known as filaments or prominences in Hα observations, ...
  • Evolution of starless cores in massive clumps seen by the ALMA ASHES and QUARKS surveys 
    Yang, Dongting; Liu, Hong-Li; Qin, Sheng-Li; Liu, Tie; Jiao, Wenyu; Garay, Guido; Sanhueza, Patricio; Xu, Feng-Wei; Zhu, Lei; Dib, S; Tang, Xindi; Stutz, Amelia; Mai, Xiaofeng; Zhang, Siju; Yang, A. Y; Tej, Anandmayee; Li, Shanghuo; Liu, Xunchuan; Garcia, Pablo; Juvela, Mika; Chibueze, J. O; Gorai, Prasanta; Kim, Kee-Tae; Lee, Chang Won; Baug, Tapas; Das, Swagat; Gupta, Shivani; Hwang, Jihye; Bronfman, Leonardo; Archana Soam; Dewangan, Lokesh (American Astronomical Society, 2026-08-01)
    We present a systematic comparative analysis of 324 starless cores in early-phase infrared-dark clouds (IRDCs; ASHES survey) and evolved-phase infrared-bright clouds (IRBCs; QUARKS survey) using 1.3 mm continuum and line ...
  • SN 2023dbc in M 108: Optical and near-infrared observations of a highly-obscured, moderately energetic stripped-envelope supernova 
    Yamanaka, Masayuki; Nagayama, Takahiro; Kumano, Akari; Sahu, D. K; Singh, A; Das, Hrishav; Anupama, G. C (Oxford University Press on behalf of the Astronomical Society of Japan, 2026-08)
    We present near-infrared (NIR) and optical observations of the highly reddened and moderately energetic Type Ib supernova (SN) 2023dbc, covering a period from 2 to 136 days after the explosion. By comparing its color ...
  • Earliest simultaneous multi-color optical observations of GRB 230328B: from 41 seconds to the host-galaxy identification 
    Komesh, T; Pozanenko, A; Pankov, N; Volnova, A; Minaev, P. Yu; Gill, R; Berdikhan, D; Grossan, B; Maksut, Z; Abdullayev, Z; Belkin, S; Krugov, M; Moskvitin, A. S; Baigarin, K; Tursynkan, A; Klunko, E; Tatarnikov, A. M; Zheltoukhov, S; Rumyantsev, V; Volvach, A. E; Volvach, L. N; Burkhonov, O. A; Ehgamberdiev, S. A; Inasaridze, R; Elenin, L; Krylov, A; Zheltobryukhov, M; Pandey, S. B; Ror, Amit Kumar; Gupta, R; Swain, Vishwajeet; Bhalerao, Varun; Anupama, G. C; Barway, Sudhanshu; Sanchez-Ramirez, R; Castro-Tirado, A. J; Antier, S; Beniamini, Paz; Abdikamalov, E (Oxford University Press on behalf of the Royal Astronomical Society, 2026-10)
    We present a multiwavelength study of the long-duration gamma-ray burst GRB 230328B, combining prompt γ-ray observations with exceptionally early simultaneous optical photometry and extensive X-ray, radio, and host-galaxy ...
  • Spectroscopic observations of 5303 Å emission along a preflare solar coronal loop—Evidence for plasma upflows 
    Ramesh, R; Priyal, M; Singh, J; Sasikumar Raja, K; Savarimuthu, P; Yuvashree, E; Nagashree, S (American Astronomical Society, 2026-08-20)
    The Visible Emission Line Coronagraph on board Aditya-L1 provides continuous spectroscopic observations of the solar corona in the Fe XIV 5303 Å emission line, which are a valuable tool to understand the plasma properties ...
  • Detection of quasiperiodic oscillations in the blazar PKS 0735+178 with TESS 
    Kishore, Shubham; Gupta, A. C; Wiita, P. J; Mondal, Sandeep K; Vivek, M (Oxford University Press on behalf of the Royal Astronomical Society, 2026-08)
    We report here the detection of signatures of a quasiperiodic oscillation (QPO) and a short flare in the optical light curve of the blazar PKS 0735+178, observed in two sectors, 71 and 72, spanning around 49 d with the ...
  • Speckle-illumination averaged wide-field reflection phase microscopy 
    Athira, T. S; Panchal, Pramod; Singh, Rakesh K; Naik, Dinesh N (Optica Publishing Group, 2026-08)
    An experimental scheme solely employing scalar optics to achieve speckle-illumination averaged wide-field reflection phase microscopy is proposed. The experimental setup utilizes a Sagnac-Linnik Michelson interferometer ...
  • Recurrent multiyear Mg II broad absorption line variability in SDSS J1333+0012 
    Vivek, M; Aromal, P; Srianand, R; Anjali, K. A; Gallagher, S. C; Rachana (American Astronomical Society, 2026-08-20)
    We present a long-term spectroscopic study of broad absorption line (BAL) variability in the quasar J1333+0012 (zem = 0.9197) using an extensive multiepoch dataset spanning nearly two decades. The dataset comprises multiepoch ...
  • 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, ...

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