22 citations · 73 across the 9 of their papers we have counts for
9 papers
Optical Spectroscopy of Classical Be Stars in Old Open Clusters
Madhu Kashyap Jagadeesh, Blesson Mathew, K. T. Paul +4
We performed the optical spectroscopy of 16 classical Be stars in 11 open clusters older than 100 Myr. Ours is the first spectroscopic study of classical Be stars in open clusters…
Flares during Eclipses of High Mass X-ray Binary Systems Vela X-1, 4U 1700-37, and LMC X-4
Ketan Rikame, Biswajit Paul, Rahul Sharma +2
In eclipsing X-ray binary systems, the direct X-ray emission is blocked by the companion star during the eclipse. We observe only reprocessed emission that contains clues about the…
Protoplanetary disks around young stellar and substellar objects in the Orionis cluster
Belinda Damian, Jessy Jose, Beth Biller +1
Understanding the evolution and dissipation of protoplanetary disks are crucial in star and planet formation studies. We report the protoplanetary disk population in the nearby you…
A novel survey for young substellar objects with the W-band filter VI: Spectroscopic census of sub-stellar members and the IMF of Orionis cluster
Belinda Damian, Jessy Jose, Beth Biller +11
Low-mass stars and sub-stellar objects are essential in tracing the initial mass function (IMF). We study the nearby young Orionis cluster (d408 pc; age1.8 Myr) usi…
Coronal Elemental Abundances during A-class Solar Flares Observed by Chandrayaan-2 XSM
Lakshitha Nama, Biswajit Mondal, S Narendranath +1
The abundances of low First Ionisation Potential (FIP) elements are three to four times higher (FIP bias) in the closed loop active corona than in the photosphere, known as the FIP…
Study of the transient nature of classical Be stars using multi-epoch optical spectroscopy
Gourav Banerjee, Blesson Mathew, K. T. Paul +8
Variability is a commonly observed property of classical Be stars (CBe) stars. In extreme cases, complete disappearance of the Hα emission line occurs, indicating a disc-less state…
UVIT view of Centaurus A; a detailed study on positive AGN feedback
Prajwel Joseph, P. Sreekumar, C. S. Stalin +4
$\require{mediawiki-texvc}$ Supermassive black holes at the centre of active galactic nuclei (AGN) produce relativistic jets that can affect the star formation characteristics of t…
Decoding the X-ray flare from MAXI J0709-159 using optical spectroscopy and multi-epoch photometry
Suman Bhattacharyya, Blesson Mathew, Savithri H Ezhikode +10
We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/GSC observations in soft and hard X-rays from MAXI J0709-159 in the direction of HD 54786 (…
Discovery of Quasi Periodic Oscillations in the persistent X-ray emission of Accreting Binary X-ray Pulsar LMC X-4
Ketan Rikame, Biswajit Paul, Pragati Pradhan +1
We report the discovery of quasi-periodic oscillations (QPOs) in the High Mass X-ray Binary (HMXB) pulsar LMC X-4 in its non-flaring (persistent) state using observations with XMM-…