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movie_M20000_e.mp4Tidal tails in nearby Open Clusters
Tidal tails in nearby Open Clusters
The tidal tails are a complex structure whose morphology depends on the cluster mass, age and the Galactic orbit.
We recently identified extended comoving features around 18 nearby open clusters (Risbud et al. 2025).
The movie shows the evolution of the tidal tails for a 20000 solar mass cluster in a Praesepe-like orbit. (Jadhav et al. 2025)
UVIT Study of Open Clusters
UVIT Study of Open Clusters
UV provides a unique tool to identify and characterise hot subluminous compact stars (such as white dwarfs and subdwarfs). We used multi-wavelength spectral energy distributions to identify these cooler+hotter component systems.
Many of the cooler components were blue stragglers (BSS) and main sequence (MS) stars. Importantly, many of the hot components are extremely low mass WD candidates (which are a result of mass transfer). This also resulted in the classification of the MS stars as blue lurkers (which are post-mass-transfer accreters on the main sequence).
See UOCS for more.
Spinning open clusters
Spinning open clusters
Open clusters, celestial families of stars born together and bound by gravity, have perpetually intrigued astronomers with their enigmatic internal dynamics. Illuminating these cosmic enigmas, a pioneering study harnessing the latest data from the European Space Agency's (ESA) Gaia Data Release 3 (DR3) has unveiled a plethora of extraordinary discoveries regarding the behaviour of these stellar assemblages.
The study unveiled that the spin frequencies observed in certain clusters surpassed expectations predicated on simulated, initially non-rotating clusters. This implies that a noteworthy portion of clusters may be born rotating or have undergone substantial interactions throughout their lifespans (Jadhav et al. 2024).
Publications
Publications
Last updated on 01.04.2026
1 ."Statistical study for binary star evolution in dense embedded clusters", Wu et al. (2026), A&A, 707, A304
2 ."A rotation-based census of blue lurker candidates in open clusters", Jadhav et al. (2026), A&A, 707, A275
3 ."Tidal tails of nearby open clusters: II. A review of simulated properties and the reliability of observational catalogues", Jadhav et al. (2025), A&A, 704, A50
4 ."Tidal tails in open clusters: Morphology, binary fraction, dynamics, and rotation", Sharma et al. (2025), A&A, 704, A167
5 ."Tidal Tails and Their Dynamics in Open Clusters Using Gaia DR3", Sharma et al. (2025), arXiv, arXiv:2509.09279
6 ."Cosmic Threads: Interlinking the Stellar Initial Mass Function from Star-Birth to Galaxies", Jerabkova et al. (2025), arXiv, arXiv:2509.06886
7 ."On the detectability and parameterization of binary stars through spectral energy distributions", Jadhav (2025), JApA, 46, 20
8 ."Tidal tails of nearby open clusters: I. Mapping with Gaia DR3", Risbud et al. (2025), A&A, 694, A258
9 ."The morphology and kinematics of the galaxy group AM 1054-325: A MUSE perspective", Yadav and Jadhav et al. (2024), A&A, 689, A346
10 ."Discovery of a Barium Blue Straggler Star in M67 and "Sighting" of Its White Dwarf Companion", Pal et al. (2024), ApJL, 970, L39
11 ."UOCS. XIV. Uncovering extremely low-mass white dwarfs and blue lurkers in NGC 752", Jadhav et al. (2024), A&A, 688, A152
12 ."The spin, expansion, and contraction of open star clusters", Jadhav et al. (2024), A&A, 687, A89
13 ."Open Star Clusters and Their Asymmetrical Tidal Tails", Kroupa et al. (2024), ApJ, 970, 94
14 ."Blue Straggler Stars of NGC 7789 and NGC 2506 Using AstroSat/UVIT", Vaidya et al. (2024), BSRSL, 93, 250
15 ."Study of Blue Metal-poor Stars Using UVIT/AstroSat", Panthi et al. (2024), BSRSL, 93, 215
16 ."UOCS - XI. Study of blue straggler stars in open cluster NGC 7142 using UVIT/AstroSat", Panthi et al. (2024), MNRAS, 527, 8325
17 ."Field blue straggler stars: discovery of white dwarf companions to blue metal-poor stars using UVIT/AstroSat", Panthi et al. (2023), MNRAS, 525, 1311
18 ."Photometric variability of blue straggler stars in M67 with TESS and K2", Vernekar et al. (2023), MNRAS, 524, 1360
19 ."UOCS. X. Rich collection of post-mass-transfer systems in NGC 6791", Jadhav et al. (2023), A&A, 676, A47
20 ."UOCS -VIII. UV study of the open cluster NGC 2506 using ASTROSAT★", Panthi et al. (2022), MNRAS, 516, 5318
21 ."Characterization of hot populations of Melotte 66 open cluster using Swift/UVOT", Rao et al. (2022), MNRAS, 516, 2444
22 ."Panchromatic study of star clusters: binaries, blue lurkers, blue stragglers and membership", Jadhav (2022), arXiv, arXiv:2207.03780
23 ."UOCS - VII. Blue straggler populations of open cluster NGC 7789 with UVIT/AstroSat", Vaidya et al. (2022), MNRAS, 511, 2274
24 ."High Mass-Ratio Binary Population in Open Clusters: Segregation of Early Type Binaries and an Increasing Binary Fraction with Mass", Jadhav et al. (2021), AJ, 162, 264
25 ."Blue Straggler Stars in Open Clusters using Gaia: Macro Properties and Formation Pathways", Jadhav and Subramaniam et al. (2021), scgr.conf, 14
26 ."UOCS - VI. UVIT/AstroSat detection of low-mass white dwarf companions to four more blue stragglers in M67", Pandey et al. (2021), MNRAS, 507, 2373
27 ."Blue straggler stars in open clusters using Gaia: dependence on cluster parameters and possible formation pathways", Jadhav and Subramaniam et al. (2021), MNRAS, 507, 1699
28 ."UOCS. IV. Discovery of diverse hot companions to blue stragglers in the old open cluster King 2", Jadhav et al. (2021), JApA, 42, 89
29 ."UOCS - III. UVIT catalogue of open clusters with machine learning-based membership using Gaia EDR3 astrometry", Jadhav et al. (2021), MNRAS, 503, 236
30 ."UVIT/AstroSat studies of blue straggler stars and post-mass transfer systems in star clusters: detection of one more blue lurker in M67", Subramaniam et al. (2020), JApA, 41, 45
31 ."Detection of White Dwarf companions to Blue Straggler Stars from UVIT observations of M67", Sindhu et al. (2020), IAUS, 351, 482
32 ."UVIT Open Cluster Study. II. Detection of Extremely Low Mass White Dwarfs and Post-Mass Transfer Binaries in M67", Jadhav et al. (2019), ApJ, 886, 13
33 ."UVIT Open Cluster Study. I. Detection of a White Dwarf Companion to a Blue Straggler in M67: Evidence of Formation through Mass Transfer", Sindhu et al. (2019), ApJ, 882, 43
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