Unresolved stellar companions with Gaia DR2 astrometry
For stars with unresolved companions, motions of the centre of light and that of mass
decouple, causing a single-source astrometric model to perform poorly. We show that such …
decouple, causing a single-source astrometric model to perform poorly. We show that such …
UOCS–VII. Blue straggler populations of open cluster NGC 7789 with UVIT/AstroSat
ABSTRACT NGC 7789 is a∼ 1.6 Gyr old, populous open cluster located at∼ 2000 pc. We
characterize the blue straggler stars (BSS) of this cluster using the Ultraviolet (UV) data from …
characterize the blue straggler stars (BSS) of this cluster using the Ultraviolet (UV) data from …
UOCS-X. Rich collection of post-mass-transfer systems in NGC 6791
Aims. NGC 6791 is one of the richest old open clusters in the Milky Way. Its position above
the Galactic plane and its number density make it an interesting middle ground between …
the Galactic plane and its number density make it an interesting middle ground between …
Photometric variability of blue straggler stars in M67 with TESS and K2
N Vernekar, A Subramaniam, VV Jadhav… - Monthly Notices of …, 2023 - academic.oup.com
Blue straggler stars (BSSs) are formed through mass transfers or mergers in binaries. The
recent detections of white dwarf (WD) companions to BSSs in M67 suggested a mass …
recent detections of white dwarf (WD) companions to BSSs in M67 suggested a mass …
Globular Cluster UVIT Legacy Survey (GlobULeS)–I. FUV–optical colour–magnitude diagrams for eight globular clusters
We present the first results of eight globular clusters (GCs) from the AstroSat/UVIT Legacy
Survey programme GlobULeS based on the observations carried out in two far-ultraviolet …
Survey programme GlobULeS based on the observations carried out in two far-ultraviolet …
UOCS. IV. Discovery of diverse hot companions to blue stragglers in the old open cluster King 2
King 2, one of the oldest clusters in the Milky Way, with an age of ∼∼ 6 Gyr and distance of
∼∼ 5700 pc, has been observed with UVIT payload on the AstroSat. With membership …
∼∼ 5700 pc, has been observed with UVIT payload on the AstroSat. With membership …
Characterization of hot populations of Melotte 66 open cluster using Swift/UVOT
Ultraviolet (UV) wavelength observations have made a significant contribution to our
understanding of hot stellar populations of star clusters. Multiwavelength spectral energy …
understanding of hot stellar populations of star clusters. Multiwavelength spectral energy …
UVIT open cluster study. I. Detection of a white dwarf companion to a blue straggler in M67: Evidence of formation through mass transfer
The old open cluster M67, populated with blue straggler stars (BSSs), is a well-known test
bed to study the BSS formation pathways. Here, we report the first direct detection of a white …
bed to study the BSS formation pathways. Here, we report the first direct detection of a white …
Peculiarities in the horizontal branch stars of globular cluster NGC 1851: Discovery of a Blue straggler companion to an EHB star
We present a study of far-UV (FUV) bright horizontal branch (HB) stars to understand the
peculiarities seen in the HB sequence of the globular cluster NGC 1851, using ground-and …
peculiarities seen in the HB sequence of the globular cluster NGC 1851, using ground-and …
Characterization of the Blue Straggler Star Populations, through Statistical, Photometric, and Spectral Energy Distribution Analysis, in the Old Open Cluster: NGC 2243
We present a statistical, photometric, and spectral energy distribution (SED) analysis of the
poorly studied old open cluster: NGC 2243, to characterize its blue straggler star (BSS) …
poorly studied old open cluster: NGC 2243, to characterize its blue straggler star (BSS) …