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Browsing by Author "Vaidya, Kaushar"

Browsing by Author "Vaidya, Kaushar"

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  • Photometry with NICMOS-3 Array Detector from Mt. Abu IR Observatory 
    Vaidya, Kaushar (Automated Data Analysis in Astronomy, 2002)
    Photometry with NICMOS-3 Array Detector from Mt. Abu IR Observatory - NASA/ADS Now on home page ads icon ads Enable full ADS view NASA/ADS Photometry with NICMOS-3 Array Detector from Mt. Abu IR Observatory Baliyan, KS ; ...
  • PRLNIC3 observations of star forming cloud L1340 
    Vaidya, Kaushar (Bulletin of the Astronomical Society of India, 2001)
    Due mainly to high extinction in optical, the structure of our galaxy, Milky Way, is not very well understood. The Galactic disk and bulge contain a host of heavily reddened open clusters which are deeply embedded within ...
  • The pulsating DA white dwarf star EC 14012−1446: results from four epochs of time-resolved photometry 
    Vaidya, Kaushar (OUP, 2008-07)
    The pulsating DA white dwarfs are the coolest degenerate stars that undergo self-driven oscillations. Understanding their interior structure will help us to understand the previous evolution of the star. To this end, we ...
  • A smoking gun in the carina nebula 
    Vaidya, Kaushar (IOP, 2009-03)
    The Carina Nebula is one of the youngest, most active sites of massive star formation in our Galaxy. In this nebula, we have discovered a bright X-ray source that has persisted for ∼30 years. The soft X-ray spectrum, ...
  • Star formation toward IRAS 10427-6032 
    Vaidya, Kaushar (Memorie della Societa Astronomica Italiana, 2017)
    We study a 5arcmin × 5arcmin region surrounding a compact H II region IRAS 10427-6032 using multi-wavelength observations. We identified 29 Class II and 5 Class I young stellar object (YSO) candidates, most of which are ...
  • Star formation toward the H II region IRAS 10427-6032 
    Vaidya, Kaushar (Elsevier, 2018-08)
    The formation and properties of star clusters formed at the edges of the H II regions are poorly known. In this paper, we study stellar content, physical conditions, and star formation processes around a relatively unknown ...
  • Studies of Blue Stragglers in star clusters with AstroSat 
    Vaidya, Kaushar (COSPAR Scientific Assembly, 2022-07)
    We present an overview of Blue Stragglers (BSs) studies in star clusters using UVIT observations onboard AstroSat. The formation of BSs has puzzled scientists for several decades since their discovery. Two main scenarios ...
  • Study of blue metal-poor stars using UVIT/AstroSat 
    Vaidya, Kaushar (ARXIV, 2023-07)
    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 ...
  • Study of Blue Straggler Stars in Open Cluster NGC 2506 using UVIT/AstroSat 
    Vaidya, Kaushar (COSPAR Scientific Assembly, 2022-07)
    Blue straggler stars (BSS) are one of the exotic stellar populations that prolong their main-sequence lifetimes by acquiring extra mass through either mass transfer or complete merger in a binary or multiple stellar system, ...
  • Tidal disruption of the aged open cluster Berkeley 17 
    Vaidya, Kaushar (IOP, 2017)
    Berkeley 17 is known to show a core-tail morphology. Pan-STARRS 1 photometry complete to gP1 ≈ 21.5 mag reveals the effect of mass segregation between the core and the tail (and an antitail). Furthermore, there is an overall ...
  • Tidal tails in the disintegrating open cluster NGC 752 
    Vaidya, Kaushar (OUP, 2021-08)
    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° around the centre of the intermediate-age ...
  • Triggered star formation in OB associations 
    Vaidya, Kaushar (CUP, 2006-08)
    We present causal and positional evidence of triggered star formation in bright-rimmed clouds in OB associations, e.g., Ori OB1, and Lac OB1, by photoionization. The triggering process is seen also on a much larger scale ...
  • UOCS – VII. Blue straggler populations of open cluster NGC 7789 with UVIT/AstroSat 
    Vaidya, Kaushar (OUP, 2022-01)
    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 the UVIT/AstroSat. We present spectral energy ...
  • UOCS – XI. Study of blue straggler stars in open cluster NGC 7142 using UVIT/AstroSat 
    Vaidya, Kaushar (OUP, 2023-12)
    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 ...
  • UOCS –VIII. UV study of the open cluster NGC 2506 using ASTROSAT 
    Vaidya, Kaushar (OUP, 2022-08)
    We study an intermediate-age open cluster (OC) NGC 2506 using the 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 ...
  • UOCS-XII. A study of open cluster NGC 6940 using UVIT/AstroSat cluster properties and exotic populations 
    Vaidya, Kaushar (OUP, 2023-12)
    We study an open cluster NGC 6940 using AstroSat/UVIT (Ultraviolet Imaging Telescope) data and other archival data. This is an intermediate age cluster (∼1 Gyr), located at about 770 pc distance, harbouring several exotic ...
  • A UVIT/AstroSat Study of Blue Straggler Stars of NGC 7789 
    Vaidya, Kaushar (COSPAR Scientific Assembly, 2022-07)
    We present a study of blue straggler stars (BSS) of open cluster NGC 7789 using the Ultraviolet (UV) data from the UVIT/AstroSat. NGC 7789 is a ∼1.6 Gyr old, populous open cluster located at ∼2000 pc. There are 13 BSS ...
  • W Ursae Majoris Contact Binary Variables as X-Ray Sources 
    Vaidya, Kaushar (IOP, 2006)
    We present cross-identification of archived ROSAT X-ray point sources with W UMa variable stars found in the All-Sky Automated Survey. A total of 34 W UMa stars have been found associated with X-ray emission. We compute ...
  • Whole Earth Telescope Observations of the Pulsating Subdwarf B Star PG 0014+067 
    Vaidya, Kaushar (IOP, 2006)
    PG 0014+067 is one of the most promising pulsating subdwarf B stars for seismic analysis, as it has a rich pulsation spectrum. The richness of its pulsations, however, poses a fundamental challenge to understanding the ...
  • X-Ray Young Stars in the Carina Nebula 
    Vaidya, Kaushar (Protostars and Planets V Posters, 2005)
    X-Ray Young Stars in the Carina Nebula - NASA/ADS Now on home page ads icon ads Enable full ADS view NASA/ADS X-Ray Young Stars in the Carina Nebula Sanchawala, K. ; Chen, W. -P. ; Lee, H. -T. ; Nakajima, Y. ; Tamura, M. ...