Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Rao, Khushboo K"'
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
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
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
Autor:
Panthi, Anju, Vaidya, Kaushar, Jadhav, Vikrant, Rao, Khushboo K., Subramaniam, Annapurni, Agarwal, Manan, Pandey, Sindhu
We study an intermediate-age open cluster NGC 2506 using the \textit{ASTROSAT}/UVIT data and other archival data. We identified 2175 cluster members using a machine learning-based algorithm, ML--MOC, on Gaia EDR3 data. Among the cluster members detec
Externí odkaz:
http://arxiv.org/abs/2209.00880
Autor:
Vaidya, Kaushar, Panthi, Anju, Agarwal, Manan, Pandey, Sindhu, Rao, Khushboo K., Jadhav, Vikrant, Subramaniam, Annapurni
NGC 7789 is a $\sim$1.6 Gyr old, populous open cluster located at $\sim$2000 pc. We characterize the blue straggler stars (BSS) of this cluster using the Ultraviolet (UV) data from the UVIT/AstroSat. We present spectral energy distributions (SED) of
Externí odkaz:
http://arxiv.org/abs/2201.08773
We utilize the robust membership determination algorithm, ML-MOC, on the precise astrometric and deep photometric data from Gaia Early Data Release 3 within a region of radius 5$^{\circ}$ around the center of the intermediate-age galactic open cluste
Externí odkaz:
http://arxiv.org/abs/2105.06108
The sedimentation level of blue straggler stars (BSS) has been shown to be a great tool to investigate the dynamical states of globular clusters (GCs). The area enclosed between the cumulative radial distributions of BSS and a reference population up
Externí odkaz:
http://arxiv.org/abs/2102.07409
The existing open cluster membership determination algorithms are either prior dependent on some known parameters of clusters or are not automatable to large samples of clusters. In this paper, we present, ML-MOC, a new machine learning based approac
Externí odkaz:
http://arxiv.org/abs/2011.13622
Blue straggler stars (BSS) are well studied in globular clusters but their systematic study with secure membership determination is lacking in open clusters. We use Gaia DR2 data to determine accurate stellar membership for four intermediate-age open
Externí odkaz:
http://arxiv.org/abs/2006.05189