Search Publications
Possibilities of identifying members from Milky Way satellite galaxies using unsupervised machine learning algorithms
Sivarani, Thirupathi; Divakar, Devika K.; Doddamani, Vijayakumar H. +1 more
A detailed study of stellar populations in Milky Way (MW) satellite galaxies remains an observational challenge due to their faintness and fewer spectroscopically confirmed member stars. We use unsupervised machine learning methods to identify new members for nine nearby MW satellite galaxies using Gaia data release-3 (Gaia DR3) astrometry, the Da…
Protoplanetary disks around young stellar and substellar objects in the σ
Paul, K. T.; Jose, Jessy; Damian, Belinda +1 more
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 young
Star-forming site RAFGL 5085: Is a perfect candidate of hub-filament system?
Dewangan, L. K.; Pandey, Rakesh; Sharma, Saurabh +4 more
To investigate the star-formation process, we present a multi-wavelength study of a massive star-forming site RAFGL 5085, which has been associated with the molecular outflow, HII region and near-infrared cluster. The continuum images at 12, 250, 350 and 500
Statistical analysis of dynamical evolution of open clusters
Joshi, Y. C.; Maurya, Jayanand; Samal, Manash Ranjan +2 more
We present the dynamical evolution of 10 open clusters, which were part of our previous studies. These clusters include both young and intermediate-age open clusters with ages ranging from
X-ray polarization observations of IC 4329A with IXPE: Constraining the geometry of X-ray corona
Stalin, C. S.; Pal, Indrani; Chatterjee, Rwitika +1 more
X-ray polarimetry is a powerful tool to probe the geometry of the hot X-ray corona in active galactic nuclei (AGN). Here, we present our results on the characterization of the X-ray polarization of the radio-quiet Seyfert-type AGN IC 4329A at a redshift of
Optical spectroscopy of Gaia detected protostars with DOT: Can we probe protostellar photospheres?
Mathew, Blesson; Manoj, P.; Narang, Mayank +7 more
Optical spectroscopy offers the most direct view of the stellar properties and the accretion indicators. Standard accretion tracers, such as H
Structural analysis of open cluster Bochum 2
Pandey, Rakesh; Sharma, Saurabh; Panwar, Neelam +5 more
We present the results from our deep optical photometric observations of Bochum 2 (Boc2) star cluster obtained using the 1.3-m Devasthal Fast Optical Telescope along with archival photometric data from Pan-STARRS2/2MASS/UKIDSS surveys. We also used high-quality parallax and proper motion data from the Gaia Data Release 3. We found that the Boc2 cl…
Teutsch 76: A deep near-infrared study
Pandey, Rakesh; Sharma, Saurabh; Dewangan, Lokesh +9 more
We have performed a detailed analysis on the Teutsch 76 (T76) open cluster using the deep near-infrared (NIR) observations taken with the TANSPEC instrument mounted on the 3.6m Devasthal optical telescope along with the recently available high quality proper motion data from the Gaia data release 3 and deep photometric data from Pan-STARRS1 survey…
Estimation of stellar parameters and mass accretion rate of classical T Tauri stars from LAMOST DR6
Mathew, Blesson; Kartha, Sreeja S.; Shridharan, B. +3 more
Classical T Tauri stars (TTS) are low-mass pre-main sequence stars with an active circumstellar environment. In this work, we present the identification and study of 260 classical TTS using LAMOST Data Release 6, among which 104 stars are newly identified. We distinguish classical TTS from giants and main-sequence dwarfs based on the
Enhanced YSO population in Serpens
Saifuddin, Md.; Hasan, S. N.; Hasan, Priya +1 more
Serpens molecular cloud is one of the most active sites of ongoing star formation at a distance of about 300 pc, and hence, is very well-suited for studies of young low-mass stars and sub-stellar objects. In this paper, for the Serpens star-forming region, we found potential members of the Young Stellar Objects (YSOs) population from the Gaia DR3 …