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  • Photo-ionization structures of Planetary Nebula IC 2003 with [WR] central star 
    Khushbu, K; Muthumariappan, C (Elsevier B.V, 2024-08-01)
    We present ionization structures of IC 2003, a planetary nebula with [WR] central star, using a 1-D dusty photo-ionization code: ”CLOUDY 17.03”. The photo-ionization model is constrained by archival UV emission line fluxes, ...
  • Kodaikanal Observatory marks 125 stellar years 
    The New Indian Express (The New Indian Express, 2024-07-09)
  • Revisiting the Dust Torus Size–Luminosity Relation Based on a Uniform Reverberation-mapping Analysis 
    Mandal, Amit Kumar; Woo, Jong-Hak; Wang, Shu; Rakshit, Suvendu; Cho, Hojin; Son, Donghoon; Stalin, C. S (2024-06-20)
    We investigate the torus size–luminosity relation of Type 1 active galactic nuclei (AGNs) based on the reverberation-mapping analysis using the light curves of the optical continuum and the IR continuum obtained with the ...
  • Equator to Pole Solar Chromospheric Differential Rotation Using Ca-K Features Derived from Kodaikanal Data 
    Kharayat, Hema; Singh, J; Priyal, M; Ravindra, B (American Astronomical Society, 2024-06-20)
    Differential rotation is one of the basic characteristics of the Sun, and it plays an important role in generating the magnetic fields and its activities. We investigated rotation rate using chromospheric features such ...
  • A Comprehensive Kinematic Model of the Large Magellanic Cloud Disk from Star Clusters and Field Stars using Gaia DR3: Tracing the Disk Characteristics, Rotation, Bar, and Outliers 
    Dhanush, S. R; Subramaniam, A; Subramanian, S (American Astronomical Society, 2024-06-20)
    The internal kinematics of the Large Magellanic Cloud (LMC) disk have been modeled by several studies using different tracers with varying coverage, resulting in a range of parameters. Here, we model the LMC disk using 1705 ...
  • An Assessment of Solar Cycle 25 progress through observation of SRBs and associated Geomagnetic Storms 
    Ndacyayisenga, Theogene; Uwamahoro, Jean; Sasikumar Raja, K; Uwamahoro, Jean Claude; Kwisanga, Christian; Monstein, Christian (Elsevier B.V, 2024-06-15)
    Geomagnetic storms are severe aspects of Space Weather. They originate due to solar transient emissions such as coronal mass ejections (CMEs), whose energetic materials propagate in the Interplanetary medium and are coupled ...
  • Age Analysis of Extrasolar Planets: Insight from Stellar Isochrone Models 
    Swastik, C; Banyal, R. K; Narang, Mayank; Unni, Athira; Sivarani, T (American Astronomical Society, 2024-06-03)
    There is growing evidence from stellar kinematics and galactic chemical evolution suggesting that giant planets (MP 0.3MJ) are relatively young compared to the most commonly occurring population of small planets (MP < ...
  • Possibilities of identifying members from Milky Way satellite galaxies using unsupervised machine learning algorithms 
    Divakar, Devika K; Saraf, Pallavi; Sivarani, T; Doddamani, Vijayakumar H (Indian Academy of Sciences, 2024-06)
    A detailed study of stellar populations in Milky Way (MW) satellite galaxies remains an observational challenge due to their faintness and fewer spectroscopically confirmed member stars. We use unsupervised machine learning ...
  • Spectroscopic Investigation of Nebular Gas (SING): instrument design, assembly and calibration 
    Bharat Chandra, P; Binukumar, G; Shubham Jankiram, Ghatul; Jain, Shubhangi; Sriram, S; Mahesh Babu, S; Mohan, Rekhesh; Safonova, M; Murthy, J; Sachkov, Mikhail (Springer Nature, 2024-06)
    The Spectroscopic Investigation of Nebular Gas (SING) is a near-ultraviolet (NUV) low-resolution spectrograph payload designed to operate in the NUV range, 1400 Å – 2700 Å, from a stable space platform. SING telescope ...
  • SolarAccel: FPGA accelerated 2D cross-correlation of digital images: Application to solar adaptive optics 
    Das, Soham; Rao, Nanditha; Phanindra, D. V. S; Sridharan, R (Indian Academy of Sciences, 2024-06)
    The cross-correlation of two-dimensional digital images is fundamental to solar adaptive optics computations. It can be used in a simple tip-tilt correction system to identify the relative shift between consecutive images ...
  • Science with the Daksha high energy transients mission 
    Bhalerao, Varun; Sawant, Disha; Pai, Archana; Tendulkar, Shriharsh; Vadawale, Santosh; Bhattacharya, Dipankar; Rana, Vikram; Adalja, Hitesh Kumar L; Anupama, G. C; Bala, Suman; Banerjee, Smaranika; Basu, Judhajeet; Belatikar, Hrishikesh; Beniamini, Paz; Bhaganagare, Mahesh; Bhaskar, Ankush; Bhattacharjee, Soumyadeep; Bose, Sukanta; Cenko, Brad; Chanda, Mehul Vijay; Dewangan, Gulab; Dixit, Vishal; Dutta, Anirban; Gawade, Priyanka; Ghodgaonkar, Abhijeet; Goyal, Shiv Kumar; Gunasekaran, Suresh; Hemanth, Manikantan; Hotokezaka, Kenta; Iyyani, Shabnam; Guruprasad, P. J; Kasliwal, Mansi; Koyande, Jayprakash G; Kulkarni, Salil; Kutty, APK; Ladiya, Tinkal; Mahapatra, Suddhasatta; Marla, Deepak; Mate, Sujay; Mehla, Advait; Mithun, N. P. S; More, Surhud; Mote, Rakesh; Mukherjee, Dipanjan; Narang, Sanjoli; Narendranath, Shyama; Nema, Ayush; Nimbalkar, Sudhanshu; Nissanke, Samaya; Palit, Sourav; Patel, Jinaykumar; Patel, Arpit; Paul, Biswajit; Pradeep, Priya; Ramachandran, Prabhu; Roy, Kinjal; Saiguhan, B.S. Bharath; Saji, Joseph; Saleem, M; Saraogi, Divita; Sastry, Parth; Shanmugam, M; Sharma, Piyush; Shetye, Amit; Singh, Nishant; Singh, Shreeya; Singhal, Akshat; Sreekumar, S; Sridhar, Srividhya; Srinivasan, Rahul; Tallur, Siddharth; Tiwari, Neeraj K; Vadladi, Amrutha Lakshmi; Vaishnava, C.S; Vishwakarma, Sandeep; Waratkar, Gaurav (Springer Nature, 2024-06)
    We present the science case for the proposed Daksha high energy transients mission. Daksha will comprise of two satellites covering the entire sky from 1 keV to > 1 MeV. The primary objectives of the mission are to ...
  • CMEs evolve in the interplanetary medium to double their predicted geo-effectiveness 
    Soni, Shirsh Lata; Maharana, Anwesha; Guerrero, Antonio; Mishra, Wageesh; Poedts, Stefaan; Thampi, Smitha (EDP Sciences, 2024-06)
    We explore the impact of interactions between coronal mass ejections (CMEs) – known as CME–CME interactions – on Earth using remote-sensing and in situ observations and estimate the amplification of the geo-effectiveness ...
  • A VLBA-uGMRT search for candidate binary black holes: study of six X-shaped radio galaxies with double-peaked emission lines 
    Sebastian, Biny; Caproni, Anderson; Kharb, Preeti; Nayana, A. J; Ali, Arshi; Rubinur, K; O Dea, Christopher P; Baum, Stefi; Nandi, Sumana (Oxford University Press on behalf of Royal Astronomical Society, 2024-06)
    Identifying methods to discover dual active galactic nucleus (AGN) has proven to be challenging. Several indirect tracers have been explored in the literature, including X/S-shaped radio morphologies and double-peaked (DP) ...
  • A 1 bit Raw Voltage-recording System for Dedicated Observations of Transients at Low Radio Frequencies 
    Bane Kshitij, Suhas Trupti; Barve, Indrajit V; Gireesh, G. V. S; Kathiravan, C; Ramesh, R (American Astronomical Society, 2024-06)
    Recently we had reported commissioning of a prototype for pulsar observations at low radio frequencies (<100 MHz) using log-periodic dipole antennas in the Gauribidanur Radio Observatory (≈77°E, 14°N) near Bangalore in ...
  • First measurements of the airglow emissions from Kolhapur using an in-house developed Fabry–Perot interferometer 
    Mahavarkar, Prasanna; Sriram, S; Joshi, Bhagyashree; Gurubaran, S (IOP Publishing, 2024-06)
    First-time airglow observations of the nighttime thermospheric wind from an in-house developed ground-based Fabry–Perot Interferometer are recorded from the Kolhapur location of India. This was the first attempt to build ...
  • Gaia DR3 Data of Very Young Open Cluster NGC 6530: Distance and Evolutionary Stage of Selected Stars 
    Parthasarathy, M (American Astronomical Society, 2024-06)
    Gaia EDR3 and Gaia DR3 data of selected stars in the very young (1.5-million-year-old) open cluster NGC 6530 are presented. All the selected stars have very accurate Gaia DR3 distances. Most of the selected stars are very ...
  • Turbulence and magnetic fields in star formation 
    Archana Soam; Eswaraiah, Chakali; Seta, Amit; Dewangan, Lokesh; Maheswar, G (Indian Academy of Sciences, 2024-06)
    Molecular clouds are prime locations to study the process of star formation. These clouds contain filamentary structures and cores, which are crucial sites for the formation of young stars. The star-formation process has ...
  • NTP Server and Weather Monitor for Kodaikanal Solar Observatory 
    Anand, M. N (Indian Institute of Astrophysics, 2024-05-29)
    We perceive time as a passage of events, a marker of change. In astronomy and astrophysics, we study events occurring over a short time (order of seconds) to long-term (a few years) variability. Accurate time stamping is ...
  • Indigenous Development Software for the 90” Mirror coating plant, VBO 
    Arumugam, V (Indian Institute of Astrophysics, 2024-05-29)
    A Telescope is an instrument that aids in the observation of stellar and celestial objects. Mirrors are an important subsystem in the Telescope. Over a period, due to weathering effects, reflection efficiency of the mirrors ...
  • Measurements of seeing-induced crosstalk in tip–tilt corrected solar polarimetry 
    Mathur, Harsh; Nagaraju, K; Pruthvi, Hemanth; Sagayanathan, K (Optica Publishing Group, 2024-05-20)
    We present measurements of seeing-induced crosstalk using spectropolarimetric observations of sunspots recorded simultaneously in the H α and Ca II 8662 Å lines with the Kodaikanal Tower Tunnel (KTT) telescope. The Kodaikanal ...

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