IIA Institutional Repository: Recent submissions

  • Astreaks: astrometry of NEOs with trailed background stars 
    Sharma, Kritti; Kumar, Harsh; Choudhary, Harsh; Bhalerao, Varun; Swain, Vishwajeet; Bolin, Bryce; Anupama, G. C; Barway, Sudhanshu; Joharle, Simran; Shenoy, Vedant (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    The detection and accurate astrometry of fast-moving near-Earth objects (NEOs) has been a challenge for the follow-up community. Their fast apparent motion results in streaks in sidereal images, thus affecting the telescope’s ...
  • Morpho-kinematic and photoionization models of the multipolar structures in planetary nebula NGC 6572 
    Bandyopadhyay, Rahul; Das, Ramkrishna; Parthasarathy, M; Kar, Subhajit (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    We have studied planetary nebula (PN) NGC 6572 through 3D morpho-kinematic and photoionization modelling. The 3D morphology is reconstructed from the Hubble Space Telescope images in different narrow-band filters and ...
  • Characterization of the Atmosphere of Extrasolar Planets 
    Sengupta, Soumya (Indian Institute of Astrophysics, 2022-05)
    Context: Starting from the first discovery of extrasolar planet or exoplanet around a sun-like star, more than 5,000 confirmed exoplanets have been detected till now. But still we have very less information and interpretations ...
  • Kinematics of Coronal Mass Ejections in the Inner Corona and its Coupling with the Heliosphere 
    Majumdar, Satabdwa (Indian Institute of Astrophysics, 2022-07)
    Ever since the dawn of astronomy, we and the Sun have not been celestial strangers anymore, and it was soon realised that there is a close Sun-Earth connection that was awaiting our acknowledgement. With that came several ...
  • Precise Transit Photometric Studies of Exoplanets and Exomoons 
    Saha, Suman (Indian Institute of Astrophysics, 2022-09)
    The most challenging limitation in the transit photometry method arises from the noises in the photometric signal. In particular, the ground-based telescopes are heavily affected by the noise due to the perturbation in ...
  • New models of reflection spectra for terrestrial exoplanets: Present and prebiotic Earth orbiting around stars of different spectral types 
    Singla, Manika; Sengupta, S (Elsevier B.V., 2023-08)
    In order to recognize a habitable exoplanet from future observed spectra, we present new model reflected spectra and geometric albedo for modern and prebiotic (∼3.9 Ga) Earth-like exoplanets orbiting within the habitable ...
  • Solar active region magnetic parameters and their relationship with the properties of halo coronal mass ejections 
    Shanmugaraju, A; Vijayalakshmi, P; Bendict Lawrance, M; Moon, Y. -J; Ebenezer, E (Elsevier B.V., 2023-08)
    The coronal mass ejections (CMEs) from the sun consist of the plasma and strong magnetic fields (~4–5 G at 1.3 R⊙) and generally, the fast CMEs are often associated with energetic particles of energy few hundreds of MeV. ...
  • BEYONDPLANCK - IV. Simulations and validation 
    Brilenkov, M; Fornazier, K. S. F; Hergt, L. T; Hoerning, G. A; Marins, A; Murokoshi, T; Fazlu Rahman; Stutzer, N-O; Zhou, Y; Abdalla, F. B; Andersen, K. J; Aurlien, R; Banerji, R; Basyrov, A; Battista, A; Bersanelli, M; Bertocco, S; Bollanos, S; Colombo, L. P. L; Eriksen, H. K; Eskilt, J. R; Foss, M. K; Franceschet, C; Fuskeland, U; Galeotta, S; Galloway, M; Gerakakis, S; Gjerløw, E; Hensley, B; Herman, D; Hoang, T. D; Ieronymaki, M; Ihle, H. T; Jewell, J. B; Karakci, A; Keihänen, E; Keskitalo, R; Maggio, G; Maino, D; Maris, M; Paradiso, S; Partridge, B; Reinecke, M; Suur-Uski, A-S; Svalheim, T. L; Tavagnacco, D; Thommesen, H; Tomasi, M; Watts, D. J; Wehus, I. K; Zacchei, A (EDP Sciences, 2023-07)
    End-to-end simulations play a key role in the analysis of any high-sensitivity cosmic microwave background (CMB) experiment, providing high-fidelity systematic error propagation capabilities that are unmatched by any other ...
  • The Origin of Dust Polarization in the Orion Bar 
    Gouellec, Valentin J. M. Le; Andersson, B-G; Archana Soam; Schirmer, Thiébaut; Michail, Joseph M.; Lopez-Rodriguez, Enrique; Flores, Sophia; Chuss, David T.; Vaillancourt, John E.; Hoang, Thiem; Lazarian, Alex (American Astronomical Society, 2023-07-10)
    The linear polarization of thermal dust emission provides a powerful tool to probe interstellar and circumstellar magnetic fields, because aspherical grains tend to align themselves with magnetic field lines. While the ...
  • Magnetic Fields and Fragmentation of Filaments in the Hub of California-X 
    Chung, Eun Jung; Lee, Chang Won; Kwon, Woojin; Tafalla, Mario; Kim, Shinyoung; Archana Soam; Cho, Jungyeon (American Astronomical Society, 2023-07-01)
    We present 850 μm polarization and C18O (3-2) molecular line observations toward the X-shaped nebula in the California molecular cloud using James Clerk Maxwell Telescope (JCMT)’s SCUBA-2/POL-2 and HARP instruments. The ...
  • Lepto-hadronic Interpretation of 2021 RS Ophiuchi Nova Outburst 
    De Sarkar, Agnibha; Nayana, A. J; Roy, Nirupam; Razzaque, Soebur; Anupama, G. C (American Astronomical Society, 2023-07-01)
    Very-high-energy (VHE; 100 GeV < E ≤ 100 TeV) and high-energy (HE; 100 MeV < E ≤ 100 GeV) gamma rays were observed from the symbiotic recurrent nova RS Ophiuchi (RS Oph) during its outburst in 2021 August by various ...
  • Misaligned Jets from Sgr A* and the Origin of Fermi/eROSITA Bubbles 
    Sarkar, Kartick C; Mondal, Santanu; Sharma, Prateek; Piran, Tsvi (American Astronomical Society, 2023-07-01)
    One of the leading explanations for the origin of Fermi Bubbles is past jet activity in the Galactic center supermassive black hole Sgr A*. The claimed jets are often assumed to be perpendicular to the Galactic plane. ...
  • ARIES ST Radar: The First Central Himalayan Wind Profiler 
    Bhattacharjee, Samaresh; Naja, Manish; Jaiswal, Aditya; Rawat, Kishan Singh; Sagar, Ram; Ananthakrishnan, S (World Scientific Publishing Company, 2022-12)
    Recently, a 206.5MHz Stratosphere Troposphere (ST) Radar system was successfully installed and made operationalized at Aryabhatta Research Institute of Observational Sciences (ARIES) (29.4N, 79.2E, 1793m amsl), Nainital, ...
  • Defining the Middle Corona 
    West, Matthew J; Seaton, D. B; Wexler, David B; Raymond, J. C; Zanna, Giulio Del; Rivera, Yeimy J; Kobelski, Adam R; Chen, Bin; DeForest, Craig; Golub, L; Caspi, Amir; Gilly, Chris R; Kooi, Jason E; Meyer, Karen A; Alterman, Benjamin L; Alzate, Nathalia; Andretta, Vincenzo; Auchere, Frederic; Banerjee, D; Berghmans, David; Chamberlin, Phillip; Chitta, L. P; Downs, Cooper; Giordano, Silvio; Harra, Louise; Higginson, Aleida; Howard, Russell A; Kumar, Pankaj; Mason, Emily; Mason, James Paul; Morton, R. J; Nykyri, Katariina; Ritesh Patel; Rachmeler, Laurel; Reardon, K. P; Reeves, Katharine K; Savage, Sabrina; Thompson, Barbara J; Kooten, Samuel J. Van; Viall, Nicholeen M; Vourlidas, Angelos; Zhukov, Andrei N (Springer, 2023-06)
    The middle corona, the region roughly spanning heliocentric distances from 1.5 to 6 solar radii, encompasses almost all of the influential physical transitions and processes that govern the behavior of coronal outflow ...
  • Evidence of high-mass star formation through multiscale mass accretion in hub-filament-system clouds 
    Liu, Hong-Li; Tej, Anandmayee; Liu, Tie; Sanhueza, Patricio; Qin, Sheng-Li; He, Jinhua; Goldsmith, Paul F; Garay, Guido; Pan, Sirong; Morii, Kaho; Li, Shanghuo; Stutz, Amelia; Tatematsu, Ken’ichi; Xu, Feng-Wei; Bronfman, Leonardo; Saha, Anindya; Issac, Namitha; Baug, Tapas; Toth, L Viktor; Dewangan, Lokesh; Wang, Ke; Zhou, Jianwen; Lee, Chang Won; Yang, Dongting; Luo, Anxu; Shen, Xianjin; Zhang, Yong; Wu, Yue-Fang; Ren, Zhiyuan; Liu, Xun-Chuan; Archana Soam; Zhang, Siju; Luo, Qiu-Yi (Oxford University Press on behalf of Royal Astronomical Society, 2023-07)
    We present a statisticalstudy of a sample of 17 hub-filament-system (HFS) clouds of high-massstar formation using high-angular resolution (∼1–2 arcsec) ALMA 1.3 and 3 mm continuum data. The sample includes eight infrared ...
  • Physics and Chemistry of Radiation Driven Cloud Evolution. [C II] Kinematics of IC 59, and IC 63 
    Caputo, Miranda; Archana Soam; Andersson, B-G; Dennis, Remy; Chambers, Ed; Gusten, Rolf; Knee, Lewis B. G; Stutzki, Jurgen (American Astronomical Society, 2023-06-20)
    We used high-resolution [C II] 158 μm mapping of two nebulae IC 59 and IC 63 from SOFIA/upGREAT in conjunction with ancillary data of the gas, dust, and polarization to probe the kinematics, structure, and magnetic properties ...
  • Star Formation in the Dwarf Seyfert Galaxy NGC 4395: Evidence for Both AGN and SN Feedback? 
    Nandi, Payel; Stalin, C. S; Saikia, D. J; Muneer, S; Mountrichas, George; Wylezalek, D; Sagar, R; Patig, M. K (American Astronomical Society, 2023-06-20)
    We present a detailed multiwavelength study of star formation in the dwarf galaxy NGC 4395, which hosts an active galactic nucleus (AGN). From our observations with the Ultra-Violet Imaging Telescope, we have compiled a ...
  • A Sensitive Search for Supernova Emission Associated with the Extremely Energetic and Nearby GRB 221009A 
    Srinivasaragavan, Gokul P; O'Connor, Brendan; Bradley Cenko, S; Dittmann, Alexander J; Yang, Sheng; Sollerman, Jesper; Anupama, G. C; Barway, Sudhanshu; Bhalerao, Varun; Kumar, Harsh; Swain, Vishwajeet; Hammerstein, Erica; Holt, Isiah; Anand, Shreya; Andreoni, Igor; Coughlin, Michael W; Dichiara, Simone; Gal-Yam, Avishay; Coleman Miller, M; Soon, Jaime; Soria, Roberto; Durbak, Joseph; Gillanders, James H; Laha, Sibasish; Moore, Anna M; Ragosta, Fabio; Troja, Eleonora (American Astronomical Society, 2023-06-01)
    We report observations of the optical counterpart of the long gamma-ray burst GRB 221009A. Due to the extreme rarity of being both nearby (z = 0.151) and highly energetic (Eγ,iso 1054 erg), GRB 221009A offers a unique ...
  • Hanle Effect with Angle-dependent Partial Frequency Redistribution in Threedimensional Media 
    Anusha, L. S (American Astronomical Society, 2023-06-01)
    There has been a constant improvement in the observational measurement of linear polarization in chromospheric spectral lines in the last three decades. However, modeling polarized profiles of these lines still remains ...
  • A study of the evolution of the bulges and disks of spiral galaxies in interacting and isolated environments 
    Ankit Kumar (Indian Institute of Astrophysics, 2022-11)

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