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Browsing by Author "Kartha, Sreeja S"

Browsing by Author "Kartha, Sreeja S"

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  • Decoding the X-Ray Flare from MAXI J0709–159 Using Optical Spectroscopy and Multiepoch Photometry 
    Bhattacharyya, Suman; Mathew, Blesson; Ezhikode, Savithri H; Muneer, S; Selvakumar, G; Maheswar, G; Arun, R; Anilkumar, Hema; Banerjee, Gourav; Kumar, S. P; Kartha, Sreeja S; Paul, KT; Velu, C (IOP Publishing, 2022-07-10)
    We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/Gas Slit Camera observations in soft and hard X-rays from MAXI J0709–159 in the direction of HD 54786 (LY CMa), on 2022 January 25. ...
  • Fullerenes in the circumstellar medium of Herbig Ae/Be stars: insights from the Spitzer mid-infrared spectral catalog 
    Arun, R; Mathew, Blesson; Manoj, P; Maheswar, G; Shridharan, B; Kartha, Sreeja S; Narang, Mayank (Oxford University Press on behalf of Royal Astronomical Society, 2023-08)
    This study presents the largest mid-infrared spectral catalogue of Herbig Ae/Be stars to date, containing the Spitzer Infrared Spectrograph spectra of 126 stars. Based on the catalogue analysis, two prominent infrared ...
  • Identifying the population of T-Tauri stars in Taurus: UV–optical synergy 
    Nayak, Prasanta K; Narang, Mayank; Puravankara, Manoj; Tyagi, Himanshu; Banerjee, Bihan; Sharma, Saurabh; Pandey, Rakesh; Surya, Arun; Mathew, Blesson; Arun, R; Ujjwal, K; Kartha, Sreeja S (Indian Academy of Sciences, 2023-12)
    With the third data release of the Gaia mission, GaiaDR3with its precise photometry and astrometry, it is now possible to study the behavior of stars at a scale never seen before. In this paper, we developed new criteria ...
  • Presence of red giant population in the foreground stellar substructure of the Small Magellanic Cloud 
    James, Dizna; Subramanian, S; Omkumar, Abinaya O; Mary, Adhya; Bekki, Kenji; Cioni, Maria-Rosa L; Grijs, Richard de; Youssouf, Dalal El; Kartha, Sreeja S; Niederhofer, Florian; Loon, Jacco Th. van (Oxford University Press on behalf of Royal Astronomical Society, 2021-12)
    The eastern region of the Small Magellanic Cloud (SMC) is found to have a foreground stellar substructure, which is identified as a distance bimodality (∼12 kpc apart) in the previous studies using red clump (RC) stars. ...
  • Spectroscopic study of Herbig Ae/Be stars in the Galactic anti-centre region from LAMOST DR5 
    Nidhi, S; Mathew, Blesson; Shridharan, B; Arun, R; Anusha, R; Kartha, Sreeja S (Oxford University Press on behalf of Royal Astronomical Society, 2023-10)
    We study a sample of 119 Herbig Ae/Be stars in the Galactic anti-centre direction using the spectroscopic data from large sky area multi-object fiber spectroscopic telescope survey program. Emission lines of hydrogen ...
  • Understanding the secular evolution of NGC 628 using UltraViolet Imaging Telescope 
    Ujjwal, K; Kartha, Sreeja S; Subramanian, S; George, Koshy; Thomas, Robin; Mathew, Blesson (Oxford University Press on behalf of Royal Astronomical Society, 2022-10)
    Secular and environmental effects play a significant role in regulating the star-formation rate and hence the evolution of the galaxies. Since ultraviolet (UV) flux is a direct tracer of the star formation in galaxies, the ...

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