55 citations · 229 across the 14 of their papers we have counts for
14 papers
Emission line star catalogues post-Gaia DR3: A validation of Gaia DR3 data using LAMOST OBA emission catalogue
B. Shridharan, Blesson Mathew, Suman Bhattacharyya +9
Gaia DR3 and further releases have the potential to identify and categorise new emission-line stars in the Galaxy. We perform a comprehensive validation of astrophysical parameters…
Active galactic nucleus feedback in NGC 3982
Prajwel Joseph, Koshy George, K. T. Paul
The energetic feedback from supermassive black holes can influence star formation at the centres of galaxies. Observational evidence for active galactic nucleus (AGN) impact on sta…
Study of Classical Be stars in open clusters older than 100 Myr
Madhu Kashyap Jagadeesh, Blesson Mathew, K. T. Paul +3
We performed the slitless spectroscopic survey to identify Classical (CBe) stars in open clusters older than 100 Myr. Observing a sample of 71 open clusters, we identified 13 CBe s…
Identification of new Classical Ae stars in the Galaxy using LAMOST DR5
R. Anusha, Blesson Mathew, B. Shridharan +6
We report the first systematic study to identify and characterize a sample of classical Ae stars in the Galaxy. The spectra of these stars were retrieved from the A-star catalog us…
Optical spectroscopy of Galactic field Classical Be stars
Gourav Banerjee, Blesson Mathew, K. T. Paul +3
In this study, we analyze the emission lines of different species present in 118 Galactic field classical Be stars in the wavelength range of 3800 - 9000 Å. We re-estimated the ext…
More insights into bar quenching. Multi-wavelength analysis of four barred galaxies
Koshy George, P. Joseph, C. Mondal +3
The underlying nature of the process of star formation quenching in the central regions of barred disc galaxies that is due to the action of stellar bar is not fully understood. We…
Significance of bar quenching in the global quenching of star formation
Koshy George, Smitha Subramanian, K. T. Paul
The suppression of star formation in the inner kiloparsec regions of barred disk galaxies due to the action of bars is known as bar quenching. We investigate here the significance…
On the mass accretion rate and infrared excess in Herbig Ae/Be Stars
R. Arun, Blesson Mathew, P. Manoj +5
The present study makes use of the unprecedented capability of the Gaia mission to obtain the stellar parameters such as distance, age, and mass of HAeBe stars. The accuracy of Gai…
Insights on bar quenching from a multi-wavelength analysis: The case of Messier 95
Koshy George, P. Joseph, C. Mondal +3
The physical processes related to the effect of bar in the quenching of star formation in the region between the nuclear/central sub-kpc region and the ends of the bar (bar-region)…
A study of Pulsation & Rotation in a sample of A-K type stars in the Kepler field
Sowgata Chowdhury, Santosh Joshi, Chris A. Engelbrecht +3
We present the results of time-series photometric analysis of 15106 A-K type stars observed by the Kepler space mission. We identified 513 new rotational variables and measured the…
Excitation mechanism of OI lines in Herbig Ae/Be stars
Blesson Mathew, P. Manoj, Mayank Narang +7
We have investigated the role of a few prominent excitation mechanisms viz. collisional excitation, recombination, continuum fluorescence and Lyman beta fluorescence on the OI line…
Short-term Hα line variations in Classical Be stars: 59 Cyg and OT Gem
Paul KT, Shruthi S Bhat, Annapurni Subramaniam
We present the optical spectroscopic study of two Classical Be stars, 59 Cyg and OT Gem obtained over a period of few months in 2009. We detected a rare triple-peak H emission p…
Spectroscopic study of Be-shell stars: 4 Her and 88 Her
Bhat S Shruthi, K T Paul, Subramaniam Annapurni +1
We present the optical spectroscopic study based on 41 spectra of 4 Her and 32 spectra of 88 Her, obtained over a period of 6 months. We estimate the rotational velocity of these s…
Study of candidate Be stars in the Magellanic Clouds using NIR photometry and optical spectroscopy
K. T. Paul, A. Subramaniam, B. Mathew +2
Mennickent et al.and Sabogal et al.identified a large number of Classical Be (CBe) candidates in the L&SMC based on their photometric variability using the OGLEII database. They cl…