• Classification of MODIS fire emission data based on aerosol absorption Angstrom exponent retrieved from AERONET data 

  Shantikumar, N. S; Khatri, Pradeep; Larson, E. J. L; Dumka, Umesh Chandra; Sarangi, Chandan; Vineeth, R (Elsevier B.V., 2023-02-01)

  Biomass burning emits a large quantity of gaseous pollutants and aerosols into the atmosphere, which perturbs the regional and global climate and has significant impacts on air quality and human health. In order to understand ...
• Optical Spectroscopy of Classical Be Stars in Old Open Clusters 

  Jagadeesh, Madhu Kashyap; Mathew, Blesson; Paul, K. T; Banerjee, Gourav; Bhattacharyya, Suman; Anusha, R; Pramod Kumar, S (IOP Publishing, 2023-03)

  We performed the optical spectroscopy of 16 classical Be stars in 11 open clusters older than 100 Myr. Ours is the first spectroscopic study of classical Be stars in open clusters older than 100 Myr. We found that the Hα ...
• Remnants of recent mergers in nearby early-type galaxies and their classification 

  Giri, Gourab; Barway, Sudhanshu; Raychaudhury, Somak (Oxford University Press on behalf of Royal Astronomical Society, 2023-04)

  We search for signatures of recent galaxy close interactions and mergers in a sample of 202 early-type galaxies in the local universe from the public SDSS Stripe82 deep images (μr ∼ 28.5 mag arcsec−2). Using two different ...
• Temporal and Latitudinal Variations in Ca-K Plage and Network Area: An Implication for Meridional Flows 

  Priyal, M; Singh, J; Ravindra, B; Sindhuja, G (American Astronomical Society, 2023-02-20)

  The Ca-K spectroheliograms obtained at the Kodaikanal observatory are used to generate a uniform time series using the equal-contrast technique for studying the long- and short-term variations in the solar chromosphere. ...
• Effect of Multiple Scattering on the Transmission Spectra and the Polarization Phase Curves for Earth-like Exoplanets 

  Singla, Manika; Chakrabarty, Aritra; Sengupta, S (American Astronomical Society, 2023-02-20)

  It is the most appropriate time to characterize the Earth-like exoplanets in order to detect biosignature beyond the Earth because such exoplanets will be the prime targets of big-budget missions like JWST, Roman ...
• UOCS-IX. AstroSat/UVIT Study of the Open Cluster NGC 2818: Blue Stragglers, Yellow Stragglers, Planetary Nebula, and their Membership 

  Sharmila Rani; Pandey, G; Subramaniam, A; Kameswara Rao, N (American Astronomical Society, 2023-03-01)

  We present the first far-UV (FUV) imaging results of the intermediate-age Galactic open cluster NGC 2818 that has a planetary nebula (PN) within the field using images taken from the Ultra Violet Imaging Telescope ...
• 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 ...
• Image Quality Specification for Solar Telescopes 

  Saraswathi Kalyani, S; Sridharan, R (Springer, 2023-01)

  Modern large ground-based solar telescopes are invariably equipped with adaptive optics systems to enhance the high angular resolution imaging and spectroscopic capabilities in the presence of Earth's atmospheric turbulence. ...
• From maximum force to the field equations of general relativity and implications 

  Kenath, Arun; Schiller, Christoph; Sivaram, C (World Scientific Publishing, 2022-10-15)

  There are at least two ways to deduce Einstein’s field equations from the principle of maximum force c4/4G or from the equivalent principle of maximum power c5/4G . Tests in gravitational wave astronomy, cosmology, and ...
• An empirical relation to estimate host galaxy stellar light from AGN spectra 

  Jalan, Priyanka; Rakshit, Suvendu; Woo, Jong-Jak; Kotilainen, Jari; Stalin, C. S (Oxford University Press on behalf of Royal Astronomical Society, 2023-05)

  Measurement of black hole mass for low-z (z≤ 0.8) Active Galactic Nuclei (AGNs) is difficult due to the strong contribution from host galaxy stellar light necessitating detailed spectral decomposition to estimate the AGN ...
• Photometric variable stars in the young open cluster NGC 6823 

  Lata, Sneh; Chen, W. P; Pandey, J. C; Dileep, Athul; Ai, Zhong-Han; Hojaev, Alisher S; Panwar, Neelam; Joshi, Santosh; Mondal, Soumen; Biswas, Siddhartha; Bhatt, B. C (Oxford University Press on behalf of Royal Astronomical Society, 2023-03)

  We present stellar variability towards the young open cluster NGC 6823. Time series V- and I-band CCD photometry led to identification and characterization of 88 variable stars, of which only 14 have been previously ...
• The Solar Ultra-Violet Imaging Telescope (SUIT) Onboard Intelligence for Flare Observations 

  Varma, Manoj; Padinhatteri, Sreejith; Sinha, Sakya; Tyagi, Anurag; Burse, Mahesh; Yadav, Reena; Kumar, Ghanshyam; Ramaprakash, Anamparambu; Tripathi, Durgesh; Sankarasubramanian, K; Nagaraju, K; Vadodariya, Koushal; Tadepalli, Srikar; Deogaonkar, Rushikesh; Olekar, Manjunath; Azaruddin, Mohamed; Unnikrishnan, Amrita (Springer, 2023-02)

  Aditya-L1 is India’s first observatory-class solar space mission to study the Sun from the Lagrange L1 point. The Solar Ultra-Violet Imaging Telescope (SUIT) is one of the payloads onboard Aditya-L1. SUIT is an off-axis ...
• Analysis of Front Side Halo CMEs and Their Solar Source Active Region and Flare Ribbon Properties 

  Vijayalakshmi, P; Shanmugaraju, A; Bendict Lawrance, M; Moon, Y.-J; Na, Hyeonock; Ebenezer, E (Springer, 2023-02)

  Halo coronal mass ejections (CMEs) from the Sun are the subset of CMEs, which are more energetic than the normal CMEs. Only the more energetic CMEs are observable in whitelight coronagraphs when they are traveling along ...
• Detection of Solar Filaments Using Suncharts from Kodaikanal Solar Observatory Archive Employing a Clustering Approach 

  Priyadarshi, Aditya; Hegde, M; Bibhuti Kumar Jha; Chatterjee, Subhamoy; Mandal, Sudip; Chowdhury, Mayukh; Banerjee, D (American Astronomical Society, 2023-02-01)

  With over 100 yr of solar observations, the Kodaikanal Solar Observatory (KoSO) is a one-of-a-kind solar data repository in the world. Among its many data catalogs, the “suncharts” at KoSO are of particular interest. ...
• 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 ...

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