IIA Institutional Repository

Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • Atomic parity nonconservation in Ra+ 
    Wansbeek, L. W; Sahoo, B. K; Timmermans, R. G. E; Jungmann, K; Das, B. P; Mukherjee, D (The American Physical Society, 2008-11)
    We report on a theoretical analysis of the suitability of the 7sS1/22↔6dD3/22 transition in singly ionized radium to measure parity nonconservation, in the light of an experiment planned at the KVI of the University of ...
  • ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions - XV. Steady accretion from global collapse to core feeding in massive hub-filament system SDC335 
    Xu, Feng-Wei; Wang, Ke; Liu, Tie; Goldsmith, Paul F; Zhang, Qizhou; Juvela, Mika; Liu, Hong-Li; Qin, Sheng-Li; Li, Guang-Xing; Tej, Anandmayee; Garay, Guido; Bronfman, Leonardo; Li, Shanghuo; Wu, Yue-Fang; Gomez, Gilberto C; Vazquez-Semadeni, Enrique; Tatematsu, Kenichi; Ren, Zhiyuan; Zhang, Yong; Toth, L. Viktor; Liu, Xunchuan; Yue, Nannan; Zhang, Siju; Baug, Tapas; Issac, Namitha; Stutz, Amelia M; Liu, Meizhu; Fuller, Gary A; Tang, Mengyao; Zhang, Chao; Dewangan, Lokesh; Lee, Chang Won; Zhou, Jianwen; Xie, Jinjin; Wang, Chao; Liu, Rong; Luo, Qiuyi; Archana Soam; Eswaraiah, Chakali (Oxford University Press on behalf of Royal Astronomical Society, 2023-04)
    We present ALMA Band-3/7 observations towards ‘the Heart’ of a massive hub-filament system (HFS) SDC335, to investigate its fragmentation and accretion. At a resolution of ∼0.03 pc, 3 mm continuum emission resolves two ...
  • ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions – IX. A pilot study towards IRDC G034.43+00.24 on multi-scale structures and gas kinematics 
    Liu, Hong-Li; Tej, Anandmayee; Liu, Tie; Goldsmith, Paul F; Stutz, Amelia; Juvela, Mika; Qin, Sheng-Li; Xu, Feng-Wei; Bronfman, Leonardo; Evans, Neal J; Saha, Anindya; Issac, Namitha; Tatematsu, Ken’ichi; Wang, Ke; Li, Shanghuo; Zhang, Siju; Baug, Tapas; Dewangan, Lokesh; Wu, Yue-Fang; Zhang, Yong; Lee, Chang Won; Liu, Xun-Chuan; Zhou, Jianwen; Archana Soam (Oxford University Press on behalf of Royal Astronomical Society, 2022-04)
    We present a comprehensive study of the gas kinematics associated with density structures at different spatial scales in the filamentary infrared dark cloud, G034.43+00.24 (G34). This study makes use of the H13CO+ (1–0) ...
  • ATOMS: ALMA three-millimeter observations of massive star-forming regions – VII. A catalogue of SiO clumps from ACA observations 
    Liu, Rong; Liu, Tie; Chen, Gang; Liu, Hong-Li; Wang, Ke; Li, Jin-Zeng; Lee, Chang Won; Liu, Xunchuan; Juvela, Mika; Garay, Guido; Dewangan, Lokesh; Archana Soam; Bronfman, Leonardo; He, Jinhua; Eswaraiah, Chakali; Zhang, Si-Ju; Zhang, Yong; Xu, Feng-Wei; Tóth, L. Viktor; Shen, Zhi-Qiang; Li, Shanghuo; Wu, Yue-Fang; Qin, Sheng-Li; Ren, Zhiyuan; Zhang, Guoyin; Tej, Anandmayee; Goldsmith, Paul F; Baug, Tapas; Luo, Qiuyi; Zhou, Jianwen; Zhang, Chang (Oxford University Press on behalf of Royal Astronomical Society, 2022-04)
    To understand the nature of SiO emission, we conducted ACA observations of the SiO (2-1) lines toward 146 massive starforming regions, as part of the ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS) ...
  • ATOMS: ALMA three-millimeter observations of massive star-forming regions – XII: Fragmentation and multiscale gas kinematics in protoclusters G12.42+0.50 and G19.88−0.53 
    Saha, Anindya; Tej, Anandmayee; Liu, Hong-Li; Liu, Tie; Issac, Namitha; Lee, Chang Won; Garay, Guido; Goldsmith, Paul F; Juvela, Mika; Qin, Sheng-Li; Stutz, Amelia; Li, Shanghuo; Wang, Ke; Baug, Tapas; Bronfman, Leonardo; Xu, Feng-Wei; Zhang, Yong; Eswaraiah, Chakali (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    We present new continuum and molecular line data from the ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS) survey for the two protoclusters, G12.42+0.50 and G19.88−0.53. The 3 mm continuum maps ...
  • An attempt of identification of barium hydride molecular lines in sunspot umbral spectra 
    Karthikeyan, B; Shanmugapriya, G; Rajamanickam, N; Bagare, S. P (Elsevier B.V, 2020-07)
    A high-resolution sunspot umbra spectrum recorded in National Solar Observatory, Kitt Peak in the visible and infrared wave number range 13, 600 – 25, 000cm−1 was taken in the present study for identifying the rotational ...
  • Authenticating the presence of a relativistic massive black hole binary in OJ 287 using Its general relativity centenary flare: improved orbital parameters 
    Dey, L; Valtonen, M. J; Gopakumar, A; Zola, S; Hudec, R; Pihajoki, P; Ciprini, S; Matsumoto, K; Sadakane, K; Kidger, M; Nilsson, K; Mikkola, S; Sillanpaa, A; Takalo, L. O; Lehto, H. J; Berdyugin, A; Piirola, V; Jermak, H; Baliyan, K. S; Pursimo, T; Caton, D. B; Alicavus, F; Baransky, A; Blay, P; Boumis, P; Boyd, D; Campas Torrent, M; Campos, F; Carrillo Gomez, J; Chandra, S; Chavushyan, V; Dalessio, J; Debski, B; Drozdz, M; Er, H; Erdem, A; Escartin Perez, A; Fallah Ramazani, V; Filippenko, A. V; Gafton, E; Ganesh, S; Garcia, F; Gazeas, K; Godunova, V; Gomez Pinilla, F; Maheswar, G; Haislip, J. B; Harmanen, J; Hurst, G; Janik, J; Jelinek, M; Joshi, A; Kagitani, M; Karjalainen, R; Kaur, N; Keel, W. C; Kouprianov, V. V; Kundera, T; Kurowski, S; Kvammen, A; LaCluyze, A. P; Lee, B. C; Liakos, A; Lindfors, E; Lozano de Haro, J; Mugrauer, M; Naves Nogues, R; Neely, A. W; Nelson, R. H; Ogloza, W; Okano, S; Pajdosz-Smierciak, U; Pandey, J. C; Perri, M; Poyner, G; Provencal, J; Raj, A; and 27 co-authors (IOP Publishing, 2018-10-10)
    Results from regular monitoring of relativistic compact binaries like PSR 1913+16 are consistent with the dominant (quadrupole) order emission of gravitational waves (GWs). We show that observations associated with the ...
  • Auto-correlation of Binary stars 
    Saha, S. K; Maitra, D (Indian Association for the Cultivation of Science, 2001)
    Speckle interferometric technique is used to record a series of short exposure images of several close binary stars with sub-arcsecond separation through a narrow band filter centred at H$\alpha$ at the Cassegrain focus ...
  • Automated classification and stellar parameterization 
    Giridhar, S; Muneer, S; Goswami, A (Memorie della Societa Astronomica Italiana, 2006)
    Different approaches for automated spectral classification are critically reviewed. We describe in detail ANN based methods which are very efficient in quick handling of the large volumes of data generated by different ...
  • Automated Detection of Accelerating Solar Eruptions Using Parabolic Hough Transform 
    Ritesh Patel; Pant, V; Priyanka Iyer; Banerjee, D; Mierla, M; West, M. J (Springer, 2021-02)
    Solar eruptions such as coronal mass ejections (CMEs) observed in the inner solar corona (up to 4 R⊙) show acceleration profiles that appear as parabolic ridges in height–time plots. Inspired by the white-light automated ...
  • Automated Detection of Coronal Mass Ejections in Stereo Heliospheric Imager Data 
    Pant, V; Willems, S; Rodriguez, L; Mierla, M; Banerjee, D; Davies, J. A (IOP Publishing, 2016-12-10)
    We present deep Very Large Array imaging of 3C 273 in order to determine the diffuse, large scale radio structure of this famous radio-loud quasar. Diffuse extended structure (radio lobes) is detected for the first time ...
  • Automated detection of coronal mass ejections in visible emission line coronagraph (VELC) on-board ADITYA-L1 
    Ritesh Patel; Amareswari, K; Pant, V; Banerjee, D; Sankarasubramanian, K (Cambridge University Press, 2018-02)
    An onboard automated coronal mass ejections (CMEs) detection algorithm has been developed for Visible Emission Line Coronagraph (VELC) onboard ADITYA-L1. The aim of this algorithm is to reduce the load on telemetry by ...
  • Automated detection of double nuclei galaxies using GOTHIC and the discovery of a large sample of dual AGN 
    Bhattacharya, Anwesh; Nehal, C. P; Mousumi Das; Paswan, Abhishek; Saha, Snehanshu; Combes, Françoise (Oxford University Press on behalf of Royal Astronomical Society, 2023-09)
    We present a novel algorithm to detect double nuclei galaxies (DNG) called GOTHIC (Graph-bOosTed iterated HIll Climbing) – that detects whether a given image of a galaxy has two or more closely separated nuclei. Our aim ...
  • Automated detection of solar radio bursts using a statistical method 
    Singh, D; Raja, K. S; Subramanian, P; Ramesh, R; Monstein, Christian (Springer, 2019-11)
    Radio bursts from the solar corona can provide clues to forecast space-weather hazards. After recent technology advancements, regular monitoring of radio bursts has increased and large observational datasets are produced. ...
  • Automated Detection of Solar Radio Bursts Using a Statistical Method 
    Singh, Dayal; Sasikumar Raja, K; Subramanian, Prasad; Ramesh, R; Monstein, Christian (Springer, 2019-08)
    adio bursts from the solar corona can provide clues to forecast space-weather hazards. After recent technology advancements, regular monitoring of radio bursts has increased and large observational datasets are produced. ...
  • An automated extinction and sky brightness monitor for the Indian Astronomical Observatory, Hanle 
    Sharma, T. K; Parihar, P. S; Banyal, R. K; Ahmad Dar, Ajaz; Kemkar, P. M. M; Stanzin, U; Anupama, G. C (Oxford University Press on behalf of the Royal Astronomical Society, 2017-08)
    We have developed a simple and portable device that makes precise and automated measurements of night sky extinction. Our instrument uses a commercially available telephoto lens for light collection, which is retrofitted ...
  • Automated Microdensitometer 
    Viswanath, C (Indian Institute of Astrophysics, Bangalore, 1980)
    An interface to a Carl Zeiss microdensitometer and the HCL's micro-computer MICRO 2200 has been built to digitize, log, and process the analog variable density information on photographic plates. The automated process ...
  • An automated pipeline for Ultra-Violet Imaging Telescope 
    Ghosh, S. K; Tandon, S. N; Singh, S. K; Shelat, D. S; Tahlani, P; Singh, A. K; Srinivasan, T. P; Joseph, P; Devaraj, A; George, K; Mohan, R; Postma, J; Stalin, C. S (Indian Academy of Sciences, 2022-12)
    We describe a versatile pipeline for processing the data collected by the Ultra-Violet Imaging Telescope (UVIT) on board Indian multi-wavelength astronomical satellite ASTROSAT. The UVIT instrument carries out simultaneous ...
  • Automated ROI selection and calibration of a microlens array using a MEMS CDM 
    Roopashree, M. B; Vyas, A; Prasad, B. R (Optical Society of America, 2011-07)
    A method of automated selection of region of interest for sensing using a microlens array by imposing Zernikes on a 140 actuator deformable mirror is presented. The positional sensitivity and optimal noise removal techniques ...
  • An Automated Spectrum Scanner 
    Bappu, M. K. V (Indian Institute of Astrophysics, Bangalore, 1977)
    A rapid-scan single channel spectrum in the Ebert-Fastie arrangement has been constructed and successfully used on the Kavalur 102-cm reflector. The special region 3000-11000 Armstrong is covered with appropriate dry-ice ...

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