IIA Institutional Repository: Recent submissions

  • Spectroscopic Investigation of Nebular Gas (SING): general objectives and preliminary optical layout 
    Sachkov, M. E; Chandra, B; Murthy, J; Shmagin, V. E; Prabha, Sh; Prakash, A; Nair, B. G; Safonova, M. V; Rai, R; Mohan, R (Institute of Astronomy of the Russian Academy of Sciences, 2020-12)
    The ultraviolet spectral subdiapasons, both near UV (180─300 nm) and far UV (115─180 nm), are highly requested by astrophysicists. The successful space missions like IUE, HST, GALEX and others provided scientists with ...
  • The pencil code, a modular MPI code for partial differential equations and particles: multipurpose and multiuser-maintained 
    The Pencil Code Collaboration; Brandenburg, Axel; Johansen, Anders; Bourdin, Philippe A; Dobler, Wolfgang; Lyra, Wladimi; Rheinhardt, Matthias; Bingert, Sven; Haugen, Nils Erland L; Mee, Antony; Gent, Frederick; Babkovskaia, Natalia; Yang, Chao-Chin; Heinemann, Tobias; Dintrans, Boris; Mitra, Dhrubaditya; Candelares, Simon; Warnecke, Jörn; Käpylä, Petri J; Li, Xiang-Yu; Krüger, Jonas; Aarnes, Jørgen R; Sarson, Graeme R; Oishi, Jeffrey S; Schober, Jennifer; Schreiber, Andreas; Chatterjee, Piyali; Käpylä, Maarit J; Plasson, Raphaël; Sandin, Christer; Karchniwy, Ewa; Rodrigues, Luiz Felippe S; Hubbard, Alexander; Guerrero, Gustavo; Snodin, Andrew; Losada, Illa R; Pekkilä, Johannes; Qian, Chengeng (2021-02-21)
    The Pencil Code is a highly modular physics-oriented simulation code that can be adapted to a wide range of applications. It is primarily designed to solve partial differential equations (PDEs) of compressible hydrodynamics ...
  • Stellar and interstellar parameters from large photometric surveys 
    Malkov, O; Karpov, S; Kovaleva, D; Murthy, J; Sichevsky, S; Sytov, A; Zhao, G; Zhukov, A; Zakharo, A (NAS RA Byurakan Astrophysical Observatory, 2020-12)
    The parameterization of stars is a well known problem and used for various purposes in astronomy. We have shown that multicolor photometric data from large modern surveys can be used for parameterization of stars. With ...
  • Time-distance helioseismology of deep meridional circulation 
    Rajaguru, S. P; Antia, H. M (Springer, 2020)
    A key component of solar interior dynamics is the meridional circulation (MC), whose poleward component in the surface layers has been well observed. Time-distance helioseismic studies of the deep structure of MC, however, ...
  • SunPy: A Python package for Solar Physics 
    Mumford, S. J; Freij, Nabil; Christe, Steven; Ireland, Jack; Mayer, Florian; Hughitt, V. K; Shih, Albert Y; Ryan, Daniel F; Liedtke, Simon; Perez-Suarez, David; Chakraborty, Pritish; Arbolante, Quinn; Gomillion, Reid; Kothar, Yash; Sharma, Yash; Stevens, Abigail L; Price-Whelan, Adrian; Mehrotra, Ambar; Kustov, Arseniy; Stone, Brandon; Dang, Trung Kien; Arias, Emmanuel; Kustov; Stone, Brandon; Dang, Trung Kien; Arias, Emmanuel; Dover, Fionnlagh Mackenzie; Verstringe, Freek; Gulshan Kumar; Mathur, Harsh; and 21 co-authors; Vishnunarayan, K I; Inglis, Andrew; Pattnaik, Punyaslok; Sipocz, Brigitta; Rishabh Sharma; Leonard, Andrew; Stansby, David; Hewett, Russell; Hamilton, Alex; Hayes, Laura; Panda, Asish; Earnshaw, Matt; Choudhary, Nitin; Kumar, Ankit; Chanda, Prateek; Haque, Md Akramul; Kirk, Michael S; Mueller, Michael; Konge, Sudarshan; Srivastava, Rajul; Jain, Yash; Bennett, Samuel; Baruah, Ankit; Barnes, Will; Charlton, Michael; Maloney, Shane; Chorley, Nicky; Himanshu; Modi, Sanskar; Mason, James Paul; Naman9639; Rozo, Jose Ivan Campos; Manley, Larry; Chatterjee, Agneet; Evans, John; Malocha, Michael; Bobra, Monica G; Ghosh, Sourav; Airmansmith97; Stanczak, Dominik; De Visscher, Ruben; Verma, Shresth; Agrawal, Ankit; Buddhika, Dumindu; Sharma, Swapnil; Park, Jongyeob; Bates, Matt; Goel, Dhruv; Taylor, Garrison; Cetusic, Goran; Jacob; Inchaurrandieta, Mateo; Dacie, Sally; Dubey, Sanjeev; Sharma, Deepankar; Bray, Erik M; Rideout, Jai Ram; Zahniy, Serge; Meszaros, Tomas; Bose, Abhigyan; Chicrala, Andre; Ankit; Guennou, Chloe; D’Avella, Daniel; Williams, Daniel; Ballew, Jordan; Murphy, Nick; Lodha, Priyank; Robitaille, Thomas; Krishan, Yash; Hill, Andrew; Eigenbrot, Arthur; Mampaey, Benjamin; Wiedemann, Bernhard M; Molina, Carlos; Keşkek, Duygu; Habib, Ishtyaq; Letts, Joseph; Bazan, Juanjo (Check ?, 2020-02-14)
    The Sun, our nearest star, is a local laboratory for studying universal physical processes. Solar physics as a discipline includes studying the Sun both as a star and as the primary driver of space weather throughout the ...
  • SunPy 
    Mumford, Stuart J; Freij, Nabil; Christe, Steven; Ireland, Jack; Mayer, Florian; Shih, Albert Y; Stansby, David; Hughitt, V. Keith; Ryan, Daniel F; Liedtke, Simon; Perez-Suarez, David; Kirk, Michael S; Mueller, Michael; Konge, Sudarshan; Srivastava, Rajul; Jain, Yash; Bennett, Samuel; Baruah, Ankit; Arbolante, Quinn; Charlton, Michael; Mishra, Sashank; Verma, Shresth; Maloney, Shane; Chorley, Nicky; Himanshu; Chouhan, Aryan; Mason, James Paul; Modi, Sanskar; Sharma, Yash; Zivadinovic, Lazar; Naman9639; Rozo, Jose Ivan Campos; Lemos, Sophie; Manley, Larry; Bobra, Monica G; Chatterjee, Agneet; Ivashkiv, Kateryna; von Forstner, J. F; Bazan, Juanjo; Stern, Kris Akira; Evans, John; Jain, Sarthak; Malocha, Michael; Agrawal, Ankit; Ghosh, Sourav; Airmansmith97; Stanczak, Dominik; Singh, Rajiv Ranjan; De Visscher, Ruben; Alam, Arib; Buddhika, Dumindu; Pathak, Himanshu; Rideout, Jai Ram; Sharma, Swapnil; Park, Jongyeob; Bates, Matt; Williams, Daniel; Mishra, Pankaj; Sharma, Deepankar; Goel, Dhruv; Taylor, Garrison; Cetusic, Goran; Reite, Guntbert; Jacob; Inchaurrandieta, Mateo; Dacie, Sally; Dubey, Sanjeev; Verma, Dipanshu; Eigenbrot, Arthur; Bray, Erik M; Aaron Paul, Jeffrey; Surve, Rutuja; Zahniy, Serge; Meszaros, Tomas; Parkhi, Utkarsh; Bose, Abhigyan; Pande, Abhishek; Price-Whelan, Adrian; Ballew, Jordan; Amogh, J; Chicrala, Andre; Ankit; Guennou, Chloe; D'Avella, Daniel; Murphy, Nick; Lodha, Priyank; Robitaille, Thomas; Augspurger, Tom; Krishan, Yash; honey; Neerajkulk; Vishnunarayan, K. I; Hill, Andrew; Mampaey, Benjamin; Wiedemann, Bernhard M; Molina, Carlos; Keşkek, Duygu; Habib, Ishtyaq; Letts, Joseph; Streicher, Ole; Gomillion, Reid; Kothari, Yash; Hayes, Laura; Mridulpandey; Stevens, Abigail L; Abijith, B; Bahuleyan, Abijith; Mehrotra, Ambar; Smith, Arfon; Kustov, Arseniy; Stone, Brandon; MacBride, Conor; Arias, Emmanuel; Chakraborty, Pritish; Tollerud, Erik; Dover, Fionnlagh Mackenzie; Verstringe, Freek; Kumar, Gulshan; Mathur, Harsh; Inglis, Andrew; Pattnaik, Punyaslok; Sipocz, Brigitta; Sharma, Rishabh; Leonard, Andrew; Hewett, Russell; Hamilton, Alex; Manhas, Abhijeet; Panda, Asish; Earnshaw, Matt; Barnes, Will; Choudhary, Nitin; Kumar, Ankit; Singh, Raahul; Chanda, Prateek; Akramul Haque, Md (Check ?, 2021-02-22)
  • Oxygen abundances of carbon-enhanced stellar population in the halo 
    Susmitha, A; Sivarani, T; Ojha, D. K; Ninan, Joe P; Bandyopadhyay, A; Surya, A; Athira, U (Springer, 2020-12)
    The large fraction of carbon-enhanced metal-poor (CEMP) stars at lower metallicities makes them an interesting class of objects to be probed further in greater detail. They show different abundance patterns of neutron-capture ...
  • Geometry of nova ejecta 
    Pavana, M; Anupama, G. C; Ramya, M. Anche; Kamath, U. S; Selva Kumar, G (Cambridge University Press, 2020)
    We present photo-ionization and morpho-kinematic analyses of the ejecta of novae. The sample consists of ten novae belonging to the Fe II, He/N and hybrid classes. The Fe II class of novae in the sample have bipolar cone-like ...
  • Diagnosing chromospheric magnetic field through simultaneous spectropolarimetry in Hα and Ca II 854.2 nm 
    Nagaraju, K; Sankarasubramanian, K; Rangarajan, K. E (Cambridge University Press, 2020)
    Measurement of magnetic field in this layer is challenging both from point of view of observations and interpretation of the data. We present in this work about spectropolarimetric observations of a pore, simultaneously ...
  • Multi-wavelength analysis of CME-driven shock and Type II solar radio burst band-splitting 
    Lata Soni, Shirsh; Ebenezer, E; lal Yadav, Manohar (Springer, 2021-03)
    It is now well established that Coronal Mass Ejections (CMEs) may produce shocks in near Sun and interplanetary medium. A Type-II radio burst is characterized by shock and associated emission with very slow frequency drift ...
  • Orbital solutions derived from radial velocities and time delays for four Kepler systems with A/F-type (candidate) hybrid pulsators⋆ 
    Lampens, P; Vermeylen, L; Fremat, Y; Sodor, A; Skarka, M; Samadi-Ghadim, A; Bognar, Zs; Lehmann, H; De Cat, P; Goswami, A; Dumortier, L (EDP Sciences, 2021-03)
    Context. The presence of A/F-type Kepler hybrid stars extending across the entirety of the δ Scuti – γ Doradus instability strips and beyond remains largely unexplained. In order to better understand these particular stars, ...
  • Design aspects of multi-slit spectropolarimeter for national large solar telescope 
    Khan, Raveena (Indian Institute of Astrophysics, 2020-07)
    Magnetic field aids in coupling between different layers of the solar atmosphere. The magnetic field information simultaneously at multiple heights is important to understand many physical processes like flares, coronal ...
  • Prototype tracking system for observing the Sun at decimeter and meter wavelengths 
    Saraswathi Kalyani, S (Indian Institute of Astrophysics, 2020-07)
    The outer atmosphere of the Sun is understood to be a very hot plasma medium. The frequency of the electromagnetic emission from a hot plasma medium depends on its electron density distribution. Since the electron density ...
  • Study on the effects of mount induced errors, temperature induced errors and basic alignment errors of TMT primary mirror segments on the image quality using PSSN metric 
    Bandyopadhyay, Soumya (Indian Institute of Astrophysics, 2019-06)
    Thirty meter telescope is one of the new class of extremely large telescopes which have a segmented primary mirror of thirty meter of total aperture that consists of 492 hexagonal segments. Several error sources like ...
  • Calibration of subsystems of visible emission line coronagraph 
    Pruthvi, Suryadevara (Indian Institute of Astrophysics, 2019-07)
    Aditya-L1, India’s first mission with multiple science payloads is designed to study the solar dynamics. Aditya-L1 includes multiple payloads, the significant one being the Visible Emission Line Coronagraph (VELC). ...
  • Study and design of a soft X-ray imager and spectrometer for observation of non-flaring Sun 
    Choudhary, Sarthak (Indian Institute of Astrophysics, 2019-06)
    The outer most layer of the Sun, also called Corona, reaches temperatures as high as a few million Kelvin much hotter than underlying photosphere and chromosphere. This phenomenon is popularly known as coronal heating. ...
  • Calibration of spectral channels for VELC onboard ADITYA-L1 and preparing data pipeline 
    Madhu, Vishnu (Indian Institute of Astrophysics, 2019-06)
    ADITYA-L1 will be India’s first space mission dedicated to solar studies. The Visible Emission Line Coronagraph (VELC) is one of the prime payloads onboard ADITYA L1. VELC will perform simultaneous imaging, spectroscopy ...
  • Single shot solar spectroscopic design aspects 
    Mathur, Harsh (Indian Institute of Astrophysics, 2019-06)
    High time-cadence Spectro-Polarimetry allows the feasibility of studying magnetic field evolution coupled with the plasma flows. Such a high cadence solar spectro-polarimetry if developed will allow one to study magnetic ...
  • Development of 6U spectrograph payload for NUV studies 
    Bharat Chandra, P (Indian Institute of Astrophysics, 2019-06)
    One of the most exciting parts of the astrophysical spectrum is the near ultraviolet (NUV: 1800 – 3000Å), where there are a number of important atomic and molecular lines. The hot gas in the halo emits in NUV and also ...
  • Development of radio antenna array and receiver system for observations of Pulsars at Low Radio Frequencies 
    Bane Kshitij, Suhas Trupti (Indian Institute of Astrophysics, 2019-06)
    A pulsar is a highly magnetized rapidly rotating neutron star. Weighing more than our Sun, yet only about 20 km in diameter, these incredibly dense objects produce radio beams that sweep the sky like a lighthouse. Pulsars ...

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