Zobrazeno 1 - 10
of 77
pro vyhledávání: '"Vaidya, Kaushar"'
We characterize blue straggler stars (BSS) and yellow straggler stars (YSS) of an open cluster (OC) Berkeley 39 using multi-wavelength observations including Swift/UVOT. Our analysis also makes use of ultraviolet (UV) data from GALEX, optical data fr
Externí odkaz:
http://arxiv.org/abs/2409.12062
We investigate the evolutionary stages of four open clusters, Berkeley 39, Collinder 261, NGC 6819, and NGC 7789, of ages ranging from 1.6 -- 6 Gyr. These clusters have previously been classified into dynamically young and intermediate age groups bas
Externí odkaz:
http://arxiv.org/abs/2409.10186
Autor:
Panthi, Anju, Vaidya, Kaushar
We study an open cluster NGC 6940 using \textit{AstroSat}/UVIT data and other archival data. This is an intermediate age cluster ($\sim$ 1 Gyr), located at about 770 pc distance, harboring several exotic populations apart from normal single and binar
Externí odkaz:
http://arxiv.org/abs/2312.13605
Autor:
Panthi, Anju, Vaidya, Kaushar, Vernekar, Nagaraj, Subramaniam, Annapurni, Jadhav, Vikrant, Agarwal, Manan
We present a study of blue straggler stars (BSSs) of open cluster NGC 7142 using AstroSat/UVIT data and other archival data. Using a machine learning-based algorithm, ML-MOC, on Gaia DR3 data, we find 546 sources as cluster members. Based on the loca
Externí odkaz:
http://arxiv.org/abs/2312.04057
Blue straggler stars (BSS), one of the most massive members of star clusters, have been used for over a decade to investigate mass segregation and estimate the dynamical ages of globular clusters (GCs) and open clusters (OCs). This work is an extensi
Externí odkaz:
http://arxiv.org/abs/2309.02746
Open clusters are excellent tools to probe the history of the Galactic disk and properties of star formation. In this work, we present a study of an old age open cluster Berkley 39 using the observations from UVOT instrument of the Neil Gehrels Swift
Externí odkaz:
http://arxiv.org/abs/2308.06195
Autor:
Panthi, Anju, Subramaniam, Annapurni, Vaidya, Kaushar, Jadhav, Vikrant, Rani, Sharmila, Thirupathi, Sivarani, Pandey, Sindhu
Blue metal-poor (BMP) stars are the main-sequence stars that appear bluer and more luminous than normal turn-off stars of metal-poor globular clusters. They are believed to be either field blue straggler stars (FBSS) formed via post-mass transfer mec
Externí odkaz:
http://arxiv.org/abs/2308.04050
Autor:
Panthi, Anju, Subramaniam, Annapurni, Vaidya, Kaushar, Jadhav, Vikrant, Rani, Sharmila, Thirupathi, Sivarani, Pandey, Sindhu, Sahu, Snehalata
Blue metal-poor stars are main-sequence stars that are bluer and brighter than typical turn-off stars in metal-poor globular clusters. They are thought to have either evolved through post-mass transfer mechanisms as field blue straggler stars or have
Externí odkaz:
http://arxiv.org/abs/2307.16409
Blue straggler stars (BSS) are peculiar objects which normally appear as a single broad sequence along the extension of the main sequence. Only four globular clusters (GCs) have been observed to have two distinct and parallel BSS sequences. For the f
Externí odkaz:
http://arxiv.org/abs/2210.02061
We carry out a search for tidal tails in a sample of open clusters with known relatively elongated morphology. We identify the member stars of these clusters from the precise astrometric and deep photometric data from $Gaia$ Early Data Release 3 usin
Externí odkaz:
http://arxiv.org/abs/2209.08259