IIAP Publications: Recent submissions

  • Lithium Abundances in Giants as a Function of Stellar Mass: Evidence for He Flash as the Source of Li Enhancement in Low-mass Giants 
    Mallick, Anohita; Raghubar Singh; Reddy, B. E (American Astronomical Society, 2023-02-10)
    In this work, we studied the distribution of lithium abundances in giants as a function of stellar mass. We used a sample of 1240 giants common among Kepler photometric and LAMOST medium-resolution (R ≈ 7500) spectroscopic ...
  • GlobULeS. IV. UVIT/AstroSat Detection of Extremely Low Mass White Dwarf Companions to Blue Straggler Stars in NGC 362 
    Dattatrey, Arvind K; Yadav, R. K. S; Sharmila Rani; Subramaniam, A; Singh, Gaurav; Sahu, Snehalata; Singh, Ravi S (American Astronomical Society, 2023-02-01)
    We report the discovery of extremely low mass white dwarfs (ELM WDs) as a companion of blue straggler stars (BSSs) in the Galactic globular cluster NGC 362 using images from AstroSatʼs Ultra Violet Imaging Telescope (UVIT). ...
  • Ultraviolet imaging observations of three jellyfish galaxies: star formation suppression in the centre and ongoing star formation in stripped tails 
    George, K; Poggianti, B. M; Tomicic, N; Postma, J; Cote, P; Fritz, J; Ghosh, S. K; Gullieuszik, M; Hutchings, J. B; Moretti, A; Omizzolo, A; Radovich, M; Sreekumar, P; Subramaniam, A; Tandon, S. N; Vulcani, B (Oxford University Press on behalf of Royal Astronomical Society, 2023-02)
    Spiral galaxies undergo strong ram-pressure effects when they fall into the galaxy cluster potential. As a consequence, their gas is stripped to form extended tails within which star formation can happen, giving them the ...
  • Witnessing the star formation quenching in L* ellipticals 
    Dhiwar, Suraj; Saha, Kanak; Dekel, Avishai; Paswan, Abhishek; Pandey, Divya; Cortesi, Arianna; Pandge, Mahadev (Oxford University Press on behalf of Royal Astronomical Society, 2023-02)
    We study the evolution of L∗ elliptical galaxies in the colour–magnitude diagram in terms of their star formation history and environment, in an attempt to learn about their quenching process. We have visually extracted ...
  • Detailed analysis of the variable star population in the globular cluster NGC 7006 
    Arellano Ferro, A; Rojas Galindo, F. C; Bustos Fierro, I. H; Muneer, S; Yepez, M. A; Giridhar, S (Oxford University Press on behalf of Royal Astronomical Society, 2023-02)
    A 5-yr CCD photometric VI time series of NGC 7006 is employed to perform a detailed analysis of the known population of variable stars. In the process, we have corrected inconsistent classifications, sky coordinates and ...
  • TXS 1433+205: The most distant gamma-ray emitting FR II radio galaxy 
    Paliya, Vaidehi S; Saikia, D. J; Stalin, C. S (Oxford University Press on behalf of Royal Astronomical Society, 2023-03)
    The orientation of the jet axis to the line of sight of the observer plays a major role in explaining the phenomena observed from blazars and radio galaxies. In the γ -ray band, only a handful of radio galaxies have been ...
  • Atmospheric heat redistribution effect on emission spectra of Hot-Jupiters 
    Sengupta, Soumya; Sengupta, S (Elsevier B.V, 2023-05)
    Hot Jupiters are the most studied and easily detectable exoplanets for transit observations. However, the correlation between the atmospheric flow and the emission spectra of such planets is still not understood. Due to ...
  • A Gaia based analysis of open cluster Berkeley 27 
    Sariya, Devesh P; Jiang, Ing-Guey; Bisht, D; Yadav, R. K. S; Rangwal, Geeta (Elsevier B.V, 2023-01)
    In this paper, we have used the Gaia’s Data Release-3 (DR3) data to study an intermediate-age open cluster Berkeley 27 (Be 27). A total of 131 most probable cluster members are picked within the cluster’s radius based ...
  • TNO or Comet? The Search for Activity and Characterization of Distant Object 418993 (2009 MS9) 
    Bufanda, Erica; Meech, Karen J; Kleyna, Jan T; Hainaut, Olivier R; Bauer, James M; Stephens, Haynes; Veres, Peter; Micheli, Marco; Keane, Jacqueline V; Weryk, Robert; Wainscoat, Richard; Sahu, D. K; Bhatt, B. C (American Astronomical Society, 2023-01)
    The perihelion of the trans-Neptunian object (TNO) 2009 MS9 brings it close to the distance where some longperiod comets are seen to become active. Knowing this, and the fact that this object appears to brighten in excess ...
  • X-Ray and Ultraviolet Flares on AT Microscopii Observed by AstroSat 
    Kuznetsov, A. A; Karakotov, R. R; Chandrashekhar, K; Banerjee, D (IOP Publishing, 2023-01)
    We present observations of the active M-dwarf binary AT Mic (dM4.5e+dM4.5e) obtained with the orbital observatory AstroSat. During 20 ks of observations, in the far-ultraviolet (130–180 nm) and soft X-ray (0.3–7 keV) spectral ...
  • Accretion flow properties of MAXI J1910-057/Swift J1910.2–0546 during its 2012–13 outburst 
    Nath, Sujoy Kumar; Debnath, Dipak; Chatterjee, Kaushik; Jana, Arghajit; Chatterjee, Debjit; Bhowmick, Riya (Elsevier B.V, 2023-01-01)
    Galactic black hole candidate MAXI J1910-057/Swift J1910.2–0546 was simultaneously discovered by MAXI/GSC and Swift/BAT satellites during its first outburst in 2012. We study the detailed spectral and temporal properties ...
  • 1-D dusty photo-ionization models of WR planetary nebulae NGC 2452 and IC 2003 
    Muthumariappan, C; Amrutha, B. M; Selvakumar, G (Elsevier B.V., 2023-01-01)
    We report dusty photo-ionization models for two Planetary Nebulae NGC 2452 and IC 2003, which have [WR] type central stars, using 1D photo-ionization code Cloudy17.02. We used the medium resolution optical spectra and ...
  • Minkowski Tensors in Redshift Space—Beyond the Plane-parallel Approximation 
    Appleby, Stephen; Kochappan, Joby P; Pravabati, C; Park, Changbom (American Astronomical Society, 2023-01-10)
    The Minkowski tensors (MTs) can be used to probe anisotropic signals in a field, and are well suited for measuring the redshift-space distortion (RSD) signal in large-scale structure catalogs. We consider how the linear ...
  • Evidence of underdeveloped torus and broad-line region of weak emission line quasars based on their spectral energy distribution 
    Kumar, Ritish; Chand, Hum; Joshi, Ravi (Oxford University Press on behalf of Royal Astronomical Society, 2023-03)
    To unravel the dominant cause of the weak emission line in a subset of optically selected radio-quiet 'weak emission line quasars' (WLQs), we have investigated the possibility of an underdeveloped broad line region (BLR). ...
  • Solar Coronal Density Turbulence and Magnetic Field Strength at the Source Regions of Two Successive Metric Type II Radio Bursts 
    Ramesh, R; Kathiravan, C; Anshu Kumari (American Astronomical Society, 2023-01-20)
    We report spectral and polarimeter observations of two weak, low-frequency (≈85–60 MHz) solar coronal type II radio bursts that occurred on 2020 May 29 within a time interval ≈2 minutes. The bursts had fine structures, ...
  • Photometric identification of compact galaxies, stars, and quasars using multiple neural networks 
    Chaini, Siddharth; Bagul, Atharva; Deshpande, Anish; Gondkar, Rishi; Sharma, Kaushal; Vivek, M; Kembhavi, Ajit (Oxford University Press on behalf of Royal Astronomical Society, 2023-01)
    We present MargNet, a deep learning-based classifier for identifying stars, quasars, and compact galaxies using photometric parameters and images from the Sloan Digital Sky Survey Data Release 16 catalogue. MargNet consists ...
  • Radio-loud Exoplanet-exomoon Survey: GMRT Search for Electron Cyclotron Maser Emission 
    Narang, Mayank; Oza, Apurva V; Hakim, Kaustubh; Manoj, P; Banyal, R. K; Thorngren, Daniel P (American Astronomical Society, 2023-01-01)
    We conducted the first dedicated search for signatures of exoplanet–exomoon interactions using the Giant Metrewave Radio Telescope (GMRT) as part of the radio-loud exoplanet-exomoon survey. Due to stellar tidal heating, ...
  • Polarization Observations of a Split-band Type II Radio Burst from the Solar Corona 
    Ramesh, R; Kathiravan, C (American Astronomical Society, 2022-11-20)
    Using temporal observations of circular polarized harmonic plasma emission from a split-band type II solar radio burst at 80 MHz, we separately estimated the coronal magnetic field strengths (B) associated with the lower ...
  • TINI: a mission for FUV spectroscopy of extended objects 
    Diebold, S; Barnstedt, J; Chandra, B; Conti, L; Ghatul, N; Kappelmann, N; Mohan, R; Murthy, J; Nair, B; Prabha, C; Rai, R; Safonova, M; Stelzer, B; Werner, K (SPIE-The International Society for Optical Engineering, 2022-08)
    The far ultraviolet (FUV, 91.2 nm to 180 nm) is the wavelength region with the greatest density of absorption and emission lines. However, despite of being one of the most exciting parts of the astrophysical spectrum, ...
  • AOTF-based spectro-polarimeter for observing Earth as an exoplanet 
    Jaiswal, Bhavesh; Singh, Swapnil; Jain, Anand; Sankarasubramanian, K; Nandi, Anuj (SPIE-Society of Photo-Optical Instrumentation Engineers, 2022-10)
    Earth is the only known habitable planet and it serves as a testbed to benchmark the observations of temperate and more Earth-like exoplanets. It is required to observe the diskintegrated signatures of Earth for a large ...

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