Sampoorna, M; Roudier, T; Paletou, F(EDP Sciences, 2026-09)
Context. Coherent structure tracking (CST) is a technique for determining solar surface horizontal flows at high spatial and temporal resolution by tracking the proper motion of granules. This technique has traditionally ...
Biswas, Samrat; Medhi, B. J; Messina, S; Zhu, Zhanpeng; Qin, Songmei; Deb, Sukanta; Sheikh, A. H; Das, H. S; Tamura, Motohide; Maheswar, G; Sagar, R(American Astronomical Society, 2026-09)
We reinvestigate the open cluster UBC 63 using the Gaia Data Release 3 and show that, rather than being a single cluster as previously classified, it is a compelling candidate for a double cluster undergoing an unbound ...
Mapping the subsurface structure and flow field of sunspots has been a challenging task for helioseismology. In this work, we investigate the propagation of acoustic waves in a sunspot in NOAA active region 11312 using ...
Rotational and transverse motions are frequently observed in solar spicules, yet the physical origin of these motions remains debated. We investigate how apparent spicule rotation arises in a stratified, magnetized solar ...
The radial and lateral dimensions of coronal mass ejections (CMEs) influence their duration and probability of encounter at Earth. These properties are linked to the expansion speeds of CMEs in different radial and lateral ...
We present complex energy-resolved properties of quasiperiodic oscillations (QPOs) in the black hole X-ray binary GRS 1915+105 using an observation from the LAXPC instrument onboard AstroSat. Power density spectra (PDSs) ...
We present the largest catalogue to date of Galaxies On Top Of Quasars (GOTOQs)---systems where the sight line to a background quasar passes directly through or very close to a foreground galaxy. Using ~1.1 million quasar ...
We perform a comprehensive hierarchical, multiscale morphological analysis to search for anomalous behavior in the large-scale matter distribution, using the convergence map from the Atacama Cosmology Telescope Data Release ...
Porel, Puja; Archana Soam; Vacca, William D; Karoly, Janik(Oxford University Press on behalf of Royal Astronomical Society, 2026-09)
Bright-rimmed clouds (BRCs) are valuable laboratories for investigating how ionizing radiation from massive stars reshapes molecular clouds and influences star formation. We present a kinematic and dynamical study of the ...
Panthi, Anju; Deshmukh, Sanmesh; Chand, Komal; Vaidya, Kaushar(Oxford University Press on behalf of Royal Astronomical Society, 2026-09)
We present a multiwavelength study of the intermediate-age (∼2.1 Gyr) open cluster Berkeley 21 using ultraviolet observations from AstroSat/UVIT together with archival optical and infrared data. A machine learning-based ...
Amrutha, S; Rigopoulou, Dimitra; Mousumi Das; Yadav, Jyoti(Oxford University Press on behalf of Royal Astronomical Society, 2026-09)
We examine the spatial correlation of emission from polycyclic aromatic hydrocarbons (PAH) (3.3, 7.7, and 11.3 µm) with the far-ultraviolet(FUV), near-ultraviolet(NUV), and Hα emission from star-forming complexes(SFCs)in ...
We present the design, indigenous development, and commissioning of a compact table-top Fabry-Perot interferometer (FPI) for high-resolution airglow observations. The system was initially tested at the Centre for Research ...
We present a spatially resolved multiwavelength study of the compact galaxy group Robert's Quartet (RQ; SCG0018-4854), aimed at understanding interaction-driven galaxy evolution in dense environments. The system comprises ...
Sarmah, Lupamudra; Bharat Kumar, Y; Campbell, S. W; Maben, Sunayana; Reddy, B. E(EDP Sciences, 2026-08)
Context. Barium star systems are excellent sites for studying asymptotic giant branch (AGB) nucleosynthesis, binary evolution, and mass transfer processes. However, an accurate estimation of their fundamental stellar ...
Feeding and feedback regulated by supermassive black holes play a central role in galaxy growth and evolution, yet these processes remain poorly understood in low-mass galaxies. In particular, the presence, properties, and ...
We studied the magnetic field evolution of active region (AR) 12975 using a time-dependent magnetofrictional model. This AR produced two consecutive coronal mass ejections associated with M-class flares on 2022 March 28. ...
Chatterjee, Debjit; Jana, Arghajit; Chatterjee, Kaushik; Bhowmick, Riya; Nath, Sujoy Kumar; Chakrabarti, S. K; Mangalam, A; Debnath, Dipak(Multidisciplinary Digital Publishing Institute, 2021-06)
We study the properties of the faint X-ray activity of Galactic transient black hole candidate XTE J1908+094 during its 2019 outburst. Here, we report the results of detailed spectral and temporal analysis during this ...
Prakash, Mahiguhappriya; Das, Susmita; Singh, H. P; Kumar, Nitesh(Multidisciplinary Digital Publishing Institute, 2026-06)
RR Lyrae stars are pulsating variables crucial for distance determination and galactic structure studies. Metallicities of fundamental-mode (RRab) RR Lyrae stars are commonly derived from photometry using empirical relations ...
Goswami, A; Choplin, Arthur; Goswami, P. P; Siess, L; Goriely, S(Multidisciplinary Digital Publishing Institute, 2026-06)
The chemical composition of stellar atmospheres provides a valuable window into the complex processes of stellar nucleosynthesis. Among chemically peculiar cool stars, many objects are the products of mass transfer in ...
We present observational evidence, based on high-resolution imaging from HST, ALMA, and AstroSat/UVIT, that the redistribution of gas driven by the bar in the face-on spiral galaxy NGC 3351 results in suppressed star ...