IIAP Publications: Recent submissions

  • Investigating the Observational Properties of Type Ib Supernova SN 2017iro 
    Kumar, Brajesh; Singh, Avinash; Sahu, D. K; Anupama, G. C (American Astronomical Society, 2022-03-01)
    We report results of optical imaging and low-resolution spectroscopic monitoring of supernova (SN) 2017iro that occurred in the nearby (∼31 Mpc) galaxy NGC 5480. The He i λ5876 feature present in the earliest spectrum (−7 ...
  • Magnetic Imprints of Eruptive and Noneruptive Solar Flares as Observed by Solar Dynamics Observatory 
    Vasantharaju, N; Vemareddy, P; Ravindra, B; Doddamani, V. H (American Astronomical Society, 2022-03-01)
    The abrupt and permanent changes of the photospheric magnetic field in the localized regions of active regions during solar flares, called magnetic imprints (MIs), have been observed for nearly the past three decades. The ...
  • Eruption of the EUV Hot Channel from the Solar Limb and Associated Moving Type IV Radio Burst 
    Vemareddy, P; Demoulin, P; Sasikumar Raja, K; Zhang, J; Gopalswamy, N; Vasantharaju, N (American Astronomical Society, 2022-03-01)
    Using the observations from the Solar Dynamics Observatory, we study an eruption of a hot-channel flux rope (FR) near the solar limb on 2015 February 9. The pre-eruptive structure is visible mainly in EUV 131 Å images, ...
  • On the Application of the Equal-contrast Technique to Ca-K Data from Kodaikanal and Other Observatories 
    Singh, J; Priyal, Muthu; Ravindra, B; Bertello, Luca; Pevtsov, Alexei A (American Astronomical Society, 2022-03-10)
    The "equal-contrast technique" (ECT) methodology, developed by Singh et al. to generate uniform long time series of Ca-K images obtained during the 20th century from the Kodaikanal Observatory (KO), improved the correlation ...
  • On the Variation in the Volumetric Evolution of CMEs from the Inner to Outer Corona 
    Majumdar, Satabdwa; Patel, Ritesh; Pant, Vaibhav (American Astronomical Society, 2022-04-10)
    Some of the major challenges faced in understanding the early evolution of coronal mass ejections (CMEs) are due to the limited observations in the inner corona (<3 R⊙) and the plane-of-sky measurements. In this work, we ...
  • Unveiling an Old Disk around a Massive Young Leaking Blueberry in SDSS-IV MaNGA 
    Paswan, Abhishek; Saha, Kanak; Borgohain, Anshuman; Leitherer, Claus; Dhiwar, Suraj (American Astronomical Society, 2022-04-10)
    Extreme emission-line galaxies, such as blue compact dwarfs (BCDs), Green Peas (GPs), and blueberries in the local universe are potential candidates for understanding the nature of galaxies that reionized the early universe. ...
  • Line Profile Studies of Coronal Active Regions in Fe XII λ195.12 Using Hinode/EIS 
    Prabhakar, Maya; Raju, K. P (American Astronomical Society, 2022-05-20)
    Coronal active regions are studied using Hinode/EIS observations in the EUV line Fe xii λ195.12 by analyzing their line profiles from 2006 December to 2019 December. The period covers the last 2 yr of solar cycle 23 and ...
  • Grain Alignment in the Circumstellar Shell of IRC+10° 216 
    Andersson, B. -G; Lopez-Rodriguez, Enrique; Medan, Ilija; Archana Soam; Hoang, Thiem; Vaillancourt, John E; Lazarian, Alex; Sandin, Christer; Mattsson, Lars; Tahani, Mehrnoosh (American Astronomical Society, 2022-06-01)
    Dust-induced polarization in the interstellar medium (ISM) is due to asymmetric grains aligned with an external reference direction, usually the magnetic field. For both the leading alignment theories, the alignment of the ...
  • Evolution of a Peculiar Type Ibn Supernova SN 2019wep 
    Gangopadhyay, A; Misra, Kuntal; Hosseinzadeh, Griffin; Arcavi, Iair; Pellegrino, Craig; Wang, Xiaofeng; Andrew Howell, D; Burke, Jamison; Zhang, Jujia; Kawabata, Koji; Singh, Mridweeka; Dastidar, Raya; Hiramatsu, Daichi; McCully, Curtis; Mo, Jun; Chen, Zhihao; Xiang, Danfeng (American Astronomical Society, 2022-05-10)
    We present a high-cadence short term photometric and spectroscopic monitoring campaign of a type Ibn SN 2019wep, which is one of the rare SN Ibn after SNe 2010al and 2019uo to display signatures of flash ionization (He ii, ...
  • Solar-Cycle Characteristics in Kodaikanal Sunspot Area: North-South Asymmetry, Phase Distribution and Gnevyshev Gap 
    Ravindra, B; Chowdhury, Partha; Javaraiah, J (Springer Nature, 2021-01)
    Solar activity is asymmetric in the two hemispheres in almost all cycles. This asymmetry is observed both in cycle amplitude and period. We have used about 90 years of sunspot-area data from the Kodaikanal Solar Observatory ...
  • SN 2020jfo: A Short-plateau Type II Supernova from a Low-mass Progenitor 
    Teja, Rishabh Singh; Singh, A; Sahu, D. K; Anupama, G. C; Kumar, Brajesh; Nayana, A. J (American Astronomical Society, 2022-05-01)
    We present spectroscopic and photometric observations of the Type IIP supernova, SN 2020jfo, in ultraviolet and optical wavelengths. SN 2020jfo occurred in the spiral galaxy M61 (NGC 4303), with eight observed supernovae ...
  • The Hubble tension: change in dark energy or a case for modified gravity? 
    Sivaram, C; Arun, K; Rebecca, Louise (Springer, 2022-03)
    Recently, much controversy has been raised about the cosmological conundrum involving the discrepancy in the value of the Hubble constant as implied by Planck satellite observations of the CMBR in the early Universe and ...
  • The MeerKAT Galaxy Cluster Legacy Survey. I. Survey Overview and Highlights 
    Knowles, K; Cotton, W. D; Rudnick, L; Camilo, F; Goedhart, S; Deane, R; Ramatsoku, M; Bietenholz, M. F; Bruggen, M; Button, C; Chen, H; Ranchod, S; Retana-Montenegro, E; Sebokolodi, L; Sikhosana, S. P; Smirnov, O; Cheetham, T; Thorat, K; Venturi, T; Abbott, T. D; Adam, R. M; Kotze, A. G; Adams, G; Aldera, M. A; Bauermeister, E. F; Bennett, T. G. H; Bode, W. A; Botha, D. H; de Villiers, D. I. L; Botha, A. G; Dikgale-Mahlakoana, M. A; du Toit, L. J; Kriek, N; Esterhuyse, S. W. P; Fadana, G; Fanaroff, B. L; Manley, J. R; Fataar, S; Foley, A. R; Fourie, D. J; Frank, B. S; Gamatham, R. R. G; Gatsi, T. G; Kriel, H; Geyer, M; Gouws, M; Gumede, S. C; Heywood, I; Marais, S. J; Hlakola, M. J; Hokwana, A; Hoosen, S. W; Horn, D. M; Horrell, J. M. G; Krishnan, V. K; Hugo, B. V; Isaacson, A. R; Jonas, J. L; Jordaan, J. D. B; Joubert, A. F; Maree, M. D. J; Julie, R. P. M; Kapp, F. B; Kasper, V. A; Kenyon, J. S; Kusel, T. W; Kotze, P. P. A; Martens, A; Legodi, L. S; Lehmensiek, R; Liebenberg, D; Lord, R. T; Taljaard, B; Lunsky, B. M; Madisa, K; Magnus, L. G; Main, J. P. L; Makhaba, A; Makhathini, S; Mauch, T; Malan, J. A; McAlpine, K; Merry, B. C; Tasse, C; Millenaar, R. P; Mokone, O. J; Monama, T. E; Chibueze, J. O; Mphego, M. C; New, W. S; Ngcebetsha, B; Ngoasheng, K. J; Ockards, M. T; Otto, A. J; Tiplady, A. J; Patel, A. A; Peens-Hough, A; Perkins, S. J; Ramanujam, N. M; Clarke, T. E; Ramudzuli, Z. R; Ratcliffe, S. M; Renil, R; Robyntjies, A; Rust, A. N; Toruvanda, O; Salie, S; Sambu, N; Schollar, C. T. G; Schwardt, L. C; Schwartz, R. L; Gasperin, F. de; Serylak, M; Siebrits, R; Sirothia, S. K; Slabber, M; Twum, S. N; Sofeya, L; Ianjamasimanana, R; van Balla, T. J; van der Byl, A; van der Merw, C; van Dy, C. L; Brederode, L. R. S; Van Tonder, V; Van Wyk, R; Venter, A. J; Venter, M; Welz, M. G; William, L. P; Jozsa, G. I. G; Xaia, B; Hilton, M; Kesebonye, K. C; Buchner, S; Kolokythas, K; Kraan-Korteweg, R. C; Lawrie, G; Lochner, M; Loubser, S. I; Marchegiani, P; Mhlahlo, N; Moodley, K; Murphy, E; Namumba, B; Burger, J. P; Oozeer, N; Parekh, V; Pillay, D. S; Passmoo, S. S; Ramaila, A. J. T (EDP Sciences, 2022-01)
    MeerKAT’s large number (64) of 13.5 m diameter antennas, spanning 8 km with a densely packed 1 km core, create a powerful instrument for wide-area surveys, with high sensitivity over a wide range of angular scales. The ...
  • Hidden in plain sight: UVIT and MUSE discovery of a large, diffuse star-forming galaxy 
    Yadav, Jyoti; Mousumi Das; Barway, Sudhanshu; Combes, Francoise (EDP Sciences, 2022-01)
    We report the discovery of a nearby large, diffuse galaxy that shows star formation using Ultra Violet Imaging Telescope (UVIT) far-UV observations and archival optical data from Multi-Unit Spectroscopic Explorer (MUSE), ...
  • Solar coronal magnetic fields and sensitivity requirements for spectropolarimetry channel of VELC onboard Aditya-L1 
    Sasikumar Raja, K; Venkata Suresh, Narra; Singh, J; Prasad, B. R (Elsevier, 2022-01-01)
    Understanding solar coronal magnetic fields is crucial to address the long-standing mysteries of the solar corona and solar wind. Although routine photospheric magnetic fields (MFs) are available for decades, coronal MFs ...
  • Investigation of two coronal mass ejections from circular ribbon source region:Origin, Sun-Earth propagation and Geoeffectiveness 
    Syed Ibrahim, M; Uddin, Wahab; Joshi, Bhuwan; Chandra, Ramesh; Awasthi, Arun Kumar (IOP Publishing, 2022-01)
    In this article, we compare the properties of two coronal mass ejections (CMEs) that show similar source region characteristics but different evolutionary behaviors in the later phases. We discuss the two events in terms ...
  • The effect of dark matter halo shape on bar buckling and boxy/peanut bulges 
    Ankit Kumar; Mousumi Das; Kataria, Sandeep Kumar (Oxford University Press on behalf of Royal Astronomical Society, 2022-01)
    It is well established that bars evolve significantly after they form in galaxy discs, often changing shape both in and out of the disc plane. In some cases they may bend or buckle out of the disc plane resulting in the ...
  • Analysis of Solar Hemispheric Chromosphere Properties using the Kodaikanal Observatory Ca–K Index 
    Chowdhury, Partha; Ravindra, B; Bertello, Luca; Pevtsov, Alexei A (IOP Publishing, 2022-01-20)
    The Kodaikanal Observatory has provided long-term synoptic observations of chromospheric activities in the Ca ii K line (393.34 nm) since 1907. This article investigates temporal and periodic variations of the hemispheric ...
  • Investigation of Rocket Effect in BRC 18 using Gaia EDR3 
    Saha, Piyali; Maheswar, G; Ojha, D. K; Neha, Sharma (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    Bright-rimmed clouds (BRCs) are ideal candidates to study radiation-driven implosion mode of star formation as they are potential sites of triggered star formation, located at the edges of HII regions, showing evidence ...
  • Multiwavelength study of the gravitationally lensed blazar QSO B0218+357 between 2016 and 2020 
    Acciari, V A; Ansoldi, S; Antonelli, L A; Engels, A Arbet; Artero, M; Asano, K; Baack, D; Babic, A; Baquero, A; Almeida, U Barres de; Barrio, J A; Sahakyan, N; Saito, T; Sakurai, S; Satalecka, K; Saturni, F G; Bernardos, M; Schleicher, B; Schmidt, K; Schweizer, T; Will, M; Green, D; Sitarek, J; Šnidarić, I; Sobczynska, D; Spolon, A; Stamerra, A; Strom, D; Strzys, M; Berti, A; Suda, Y; Surić, T; Hadasch, D; Bhattacharyya, W; Takahashi, M; Tavecchio, F; Temnikov, P; Terzić, T; Teshima, M; Tosti, L; Truzzi, S; Tutone, A; Besenrieder, J; Hahn, A; Ubach, S; López-Oramas, A; Wunderlich, C; Zarić, D; de Palma, F; D’Ammando, F; Barnacka, A; Sahu, D K; Hodges, M; Hovatta, T; Heckmann, L; Kiehlmann, S; Max-Moerbeck, W; Loporchio, S; Bigongiari, C; Readhead, A C S; Reeves, R; Pearson, T J; Lähteenmäki, A; Björklund, I; Tornikoski, M; Herrera, J; Tammi, J; Suutarinen, S; Hada, K; Fraga, B Machado de Oliveira; Niinuma, K; Biland, A; Blanch, O; Bonnoli, G; Bosnjak, Z; Busetto, G; Hoang, J; Carosi, R; Ceribella, G; Cerruti, M; Chai, Y; Maggio, C; Chilingarian, A; Cikota, S; Colak, S M; Colombo, E; Contreras, J L; Hrupec, D; Cortina, J; Covino, S; D’Amico, G; D’Elia, V; Da Vela, P; Majumdar, P; Dazzi, F; De Angelis, A; De Lotto, B; Delfino, M; Hütten, M; Delgado, J; Mendez, C Delgado; Depaoli, D; Pierro, F Di; Venere, L Di; Espiñeira, E Do Souto; Makariev, M; Prester, D Dominis; Donini, A; Dorner, D; Inada, T; Doro, M; Elsaesser, D; Ramazani, V Fallah; Fattorini, A; Ferrara, G; Fonseca, M V; Font, L; Mallamaci, M; Fruck, C; Fukami, S; Manganaro, M; López, R J García; Garczarczyk, M; Gasparyan, S; Gaug, M; Giglietto, N; Giordano, F; Gliwny, P; Godinović, N; Maneva, G; Green, J G; Scherpenberg, J van; Inoue, S; Ishio, K; Iwamura, Y; Jiménez, I; Jormanainen, J; Jouvin, L; Kajiwara, Y; Karjalainen, M; Kerszberg, D; Kobayashi, Y; Vanzo, G; Mannheim, K; Kubo, H; Kushida, J; Lamastra, A; Lelas, D; Leone, F; Lindfors, E; Lombardi, S; Longo, F; López-Coto, R; Vazquez Acosta, M; López-Moya, M; Batkovic, I; Maraschi, L; Mariotti, M; Martínez, M; Mazin, D; Menchiari, S; Mender, S; Mićanović, S; Miceli, D; Ventura, S; Miener, T; Minev, M; Gonzalez, J Becerra; Miranda, J M; Mirzoyan, R; Molina, E; Moralejo, A; Morcuende, D; Moreno, V; Moretti, E; Verguilo, V; Neustroev, V; Nigro, C; Nilsson, K; Bednarek, W; Nishijima, K; Noda, K; Nozaki, S; Ohtani, Y; Oka, T; Otero-Santos, J; Vigorito, C F; Paiano, S; Palatiello, M; Paneque, D; Paoletti, R; Bellizzi, L; Paredes, J M; Pavletić, L; Peñil, P; Perennes, C; Persic, M; Vitale, V; Moroni, P G Prada; Prandini, E; Priyadarshi, C; Puljak, I; Rhode, W; Bernardini, E; Ribó, M; Rico, J; Righi, C; Rugliancich, A; Vovk, I; Saha, L (Oxford University Press on behalf of Royal Astronomical Society, 2022-02)
    We report multiwavelength observations of the gravitationally lensed blazar QSO B0218+357 in 2016–2020. Optical, X-ray, and GeV flares were detected. The contemporaneous MAGIC observations do not show significant very high ...

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