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Browsing by Author "Rachana"

Browsing by Author "Rachana"

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  • Anomalous narrow line Seyfert I galaxies from SDSS DR17 
    Tiwari, Arihant; Rachana; Vivek, M; Rakshit, S (American Astronomical Society, 2026-03-01)
    We present an analysis of 22,656 narrow-line Seyfert 1 galaxies (NLSy1s) from the Sloan Digital Sky Survey (SDSS) DR17 (0.1 ≤ z ≤ 0.9), identifying a sample of spectroscopically anomalous sources. These anomalies were ...
  • Estimating the masses of narrow line Seyfert 1 galaxies using damped random walk method 
    Rachana; Vivek, M; Shen, Yue (Oxford University Press on behalf of Royal Astronomical Society, 2026-01)
    Narrow-line Seyfert 1 galaxies (NLSy1s) are a subclass of active galactic nuclei (AGNs), commonly associated with rapidly accreting, relatively low-mass black holes (106 –108 M) hosted in spiral galaxies. Although typically ...

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