IIA Institutional Repository: Recent submissions

  • The metal-poor end of the Spite plateau. II. Chemical and dynamical investigation 
    Pinto, A. M. Matas; Spite, M; Caffau, E; Bonifacio, P; Sbordone, L; Sivarani, T; Steffen, M; François, P; Di Matteo, P (EDP Sciences, 2021-10)
    Context. The study of old, metal-poor stars deepens our knowledge on the early stages of the universe. In particular, the study of these stars gives us a valuable insight into the masses of the first massive stars and their ...
  • Study of classical Be stars in open clusters older than 100 Myr 
    Jagadeesh, Madhu Kashyap; Blesson, Mathew; Paul, K. T; Banerjee, Gourav; Subramaniam, A; Arun, R (Springer, 2021-10)
    We performed the slitless spectroscopic survey to identify classical Be (CBe) stars in open clusters older than 100 Myr. Observing a sample of 71 open clusters, we identified 13 CBe stars in 11 open clusters, one of, ...
  • Magnetic Structure in Successively Erupting Active Regions: Comparison of Flare-Ribbons With Quasi-Separatrix Layers 
    Vemareddy, P (Frontiers, 2021-10)
    This paper studies the magnetic topology of successively erupting active regions (ARs) 11,429 and 12,371. Employing vector magnetic field observations from Helioseismic and Magnetic Imager, the pre-eruptive magnetic ...
  • Impacts of Aerosol Loading in the Hindu Kush Himalayan Region Based on MERRA-2 Reanalysis Data 
    Shantikumar, N. S; Dumka, Umesh Chandra; Mugil, Sivasamy Kalamani; Kuniyal, Jagdish Chandra; Hooda, Rakesh K; Gautam, Alok Sagar; Tiwari, Suresh (MDPI, 2021-10)
    The impacts of climate change have severely affected geosphere, biosphere and cryosphere ecosystems in the Hindu Kush Himalayan (HKH) region. The impact has been accelerating further during the last few decades due to rapid ...
  • The Prominence Driven Forced Reconnection in the Solar Corona and Associated Plasma Dynamics 
    Srivastava, A. K; Mishra, S. K; Jelínek, P (IOP Publishing, 2021-10-01)
    Using the multitemperature observations from SDO/AIA on 2019 December 30, we provide a signature of prominence driven forced magnetic reconnection in the corona and associated plasma dynamics from 09:20 UT to 10:38 UT. ...
  • Solar Cycle Evolution of Filaments over a Century: Investigations with the Meudon and McIntosh Hand-drawn Archives 
    Mazumder, Rakesh; Chatterjee, Subhamoy; Nandy, Dibyendu; Banerjee, D (IOP Publishing, 2021-10-01)
    Hand-drawn synoptic maps from the Meudon Observatory (1919 onwards) and the McIntosh archive (1967 onwards) are two important sources of long-term, manually recorded filament observations. In this study, we calibrate the ...
  • The total solar eclipse in the Bhagavata: its depiction in words and in images 
    Kapoor, R. C (Centre for Astronomy Research & Development, 2021-12)
    There is reference to a total solar eclipse over Kurukshetra in an ancient Indian text, the Srimadbhagvata (also the Bhagavata). The occasion drew not just Lord Krsṇa, his brother Balarama and their clan from Dwarka, but ...
  • Solar eclipses in India’s cultural and political history 
    Kapoor, R. C (Cambridge University Press, 2021-12)
    This contribution presents earliest records in the Indian stone inscriptions and literature that specifically mention the eclipse as total or annular and the eclipses that timed with wars. Solar cult temples can be found ...
  • GROWTH-India Observations of Solar System Objects 
    Sharma, Kritti; Kumar, Harsh; Bolin, Bryce; Bhalerao, Varun; Anupama, G. C; Barway, Sudhanshu (Europlanet Science Congress, 2021-09)
    The discovery, characterisation, and monitoring of Near-Earth Objects (NEOs) are critical for understanding and potentially mitigating the long-term threats to our civilisation from Potential Hazardous Asteroids (PHAs). ...
  • Star formation around three co-moving HAeBe stars in the Cepheus Flare 
    Saha, Piyali; Maheswar, G; Mathew, B; Kamath, U. S (EDP Sciences, 2021-09)
    The presence of three more Herbig Ae/Be (HAeBe) candidates in the Cepheus Flare within a 1.5° radius centered on HD 200775 suggests that star formation is prevalent in a wider region of the LDN 1147/1158, LDN 1172/1174, ...
  • Segmentation of Coronal Features to Understand the Solar EUV and UV Irradiance Variability III. Inclusion and Analysis of Bright Points 
    Zwaard, Rens van der; Bergmann, Matthias; Zender, ·Joe; Kariyappa, R; Giono, Gabriel; Dame, Luc (Springer, 2021-09)
    The study of solar irradiance variability is of great importance in heliophysics, Earth’s climate, and space weather applications. These studies require careful identifying, tracking and monitoring of features in the solar ...
  • Radial Sizes and Expansion Behavior of ICMEs in Solar Cycles 23 and 24 
    Mishra, Wageesh; Doshi, Urmi; Srivastava, Nandita (Frontiers, 2021-09)
    We attempt to understand the influence of the heliospheric state on the expansion behavior of coronal mass ejections (CMEs) and their interplanetary counterparts (ICMEs) in solar cycles 23 and 24. Our study focuses on ...
  • Indian Institute of Astrophysics Annual Report: 2020-21 
    Subramaniam, A (Indian Institute of Astrophysics, 2021)
  • AstroSat observation of non-resonant type-C QPOs in MAXI J1535-571 
    Chatterjee, Debjit; Debnath, D; Jana, A; Shang, J.-R.; Chakrabarti, S.K.; Chang, H.-K; Banerjee, A; Bhattacharjee, A; Chatterjee, K; Bhowmick, R; Nath, S.K (Springer, 2021-08)
    Galactic transient black hole candidate (BHC) MAXI J1535-571 was discovered on 2017 September 02 simultaneously by MAXI/GSC and Swift/BAT instruments. It has also been observed by India’s first multi-wavelength astronomy-mission ...
  • A minimal space interferometer configuration for imaging at low radio frequencies 
    Jaini, Akhil; Deshpande, Avinash A; Bitragunta, Sainath (Cambridge University Press, 2021-08)
    The radio sky at lower frequencies, particularly below 20 MHz, is expected to be a combination of increasingly bright non-thermal emission and significant absorption from intervening thermal plasma. The sky maps at these ...
  • Impact of Aerosol and Cloud on the Solar Energy Potential over the Central Gangetic Himalayan Region 
    Dumka, Umesh Chandra; Kosmopoulos, Panagiotis G; Shantikumar, N. S (Multidisciplinary Digital Publishing Institute, 2021-08)
    We examine the impact of atmospheric aerosols and clouds on the surface solar radiation and solar energy at Nainital, a high-altitude remote location in the central Gangetic Himalayan region (CGHR). For this purpose, we ...
  • Investigating Width Distribution of Slow and Fast CMEs in Solar Cycles 23 and 24 
    Pant, V; Majumdar, S; Patel, R; Chauhan, A; Banerjee, D; Gopalswamy, N (Frontiers, 2021-05)
    Coronal Mass Ejections (CMEs) are highly dynamic events originating in the solar atmosphere, that show a wide range of kinematic properties and are the major drivers of the space weather. The angular width of the CMEs ...
  • Characterizing Spectral Channels of Visible Emission Line Coronagraph of Aditya-L1 
    Ritesh Patel; Megha, A; Shrivastav, Arpit Kumar; Pant, V; Vishnu, M; Sankarasubramanian, K; Banerjee, D (Frontiers, 2021-06)
    Aditya-L1 is India’s first solar mission with the Visible Emission Line Coronagraph (VELC), which consists of three spectral channels taking high-resolution spectroscopic observations of the inner corona up to 1.5 Rʘ at ...
  • Variable Stars in Palomar 13; an Evaporating Globular Cluster 
    Yepez, M. A; Ferro, A. Arellano; Schröder, K. P.; Muneer, S; Giridhar, Sunetra; Allen, Christine (Astronomical Society of the Pacific, 2021-06)
    We present new CCD VI photometry of the globular cluster Pal 13. Fourier decomposition of the light curves of RRab stars lead to estimations of [Fe/H]ZW = -1.65±0.15, and a distance to the cluster of 23.67±0.57 kpc. A ...
  • Understanding galaxy mergers and AGN feedback with UVIT 
    Rubinur, K; Mousumi Das; Kharb, Preeti; Rahne, P. T (Cambridge University Press, 2021-01)
    Simulations expect an enhanced star-formation and active galactic nuclei (AGN) activity during galaxy mergers, which can lead to formation of binary/dual AGN. AGN feedback can enhance or suppress star-formation. We have ...

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