Welcome to the Digital Repository of Indian Institute of Astrophysics

This digital repository of Indian Institute of Astrophysics (IIAP), Bangalore, India is developed to capture, organize disseminate and preserve the research publications of IIAP. It also includes the in-house technical reports and annual reports in addition to various other grey literatures created within the institute.You can search, browse and access full text of these publications from the repository.

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Recently Added

  • Modification of Newtonian gravity: Implications for hot gas in clusters and galactic angular momentum 
    Rebecca, Louise; Sebastian, Dominic; Sivaram, C; Arun, K (World Scientific Publishing, 2025-05-30)
    In view of the negative results from various dark matter detection experiments, we had earlier proposed an alternate theoretical framework through modification of Newtonian gravity (MONG). Here, the Poison’s equation is ...
  • Warm ionized gas outflows in Active Galactic Nuclei: What causes them? 
    Nandi, Payel; Stalin, C. S; Saikia, D. J (American Astronomical Society, 2025-05-01)
    The driving force behind outflows, often invoked to understand the correlation between the supermassive black holes powering active galactic nuclei (AGN) and their host galaxy properties, remains uncertain. We provide new ...
  • The Lyα sky as observed by New Horizons at 57 AU 
    Gladstone, G. Randall; Shull, J. Michael; Pryor, Wayne R; Slavin, Jonathan; Kammer, Joshua A; Becker, Tracy M; Lauer, Tod R; Postman, Marc; Spencer, John R; Parker, Joel Wm; Retherford, Kurt D; Velez, Michael A; Versteeg, Maarten H; Davis, Michael W; Froning, Cynthia S; Ertley, Camden D; Cunningham, Nathaniel; Murthy, J; Henry, Richard C; Redfield, Seth; Lisse, Carey M; Singer, Kelsi N; Verbiscer, Anne J; Brandt, Pontus C; Stern, S. Alan (American Astronomical Society, 2025-05)
    During 2023 September the Alice ultraviolet spectrograph on the New Horizons (NH) spacecraft was used to map diffuse Lyα emission over most of the sky, at a range of ∼56.9 au from the Sun. At that distance, models predict ...
  • The long-term optical flux variations of Compact Symmetric Objects 
    Swain, Subhashree; Paliya, Vaidehi S; Saikia, D. J; Stalin, C. S; Venugopal, Arya; Bhavya, A. K; Ravikumar, C. D (Springer Nature, 2025-05)
    Compact Symmetric Objects (CSOs) are a distinct category of jetted active galactic nuclei (AGN) whose optical variability characteristics have not been well investigated. We present here the results of our investigation ...
  • Solar cycle variations in meridional flows and rotational shear within the sun's near-surface shear layer 
    Sen, Anisha; Rajaguru, S. P; Iyer, Abhinav G; Chen, Ruizhu; Zhao, Junwei; Kholikov, S (American Astronomical Society, 2025-05-01)
    Using solar cycle–long helioseismic measurements of meridional and zonal flows in the near-surface shear layer (NSSL) of the Sun, we study their spatiotemporal variations and connections to active regions. We find that ...

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