Shantikumar, N. S; Khatri, Pradeep; Larson, E. J. L; Dumka, Umesh Chandra; Sarangi, Chandan; Vineeth, R(Elsevier B.V., 2023-02-01)
Biomass burning emits a large quantity of gaseous pollutants and aerosols into the atmosphere, which perturbs the regional and global climate and has significant impacts on air quality and human health. In order to understand ...
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 older than 100 Myr. We found that the Hα ...
Giri, Gourab; Barway, Sudhanshu; Raychaudhury, Somak(Oxford University Press on behalf of Royal Astronomical Society, 2023-04)
We search for signatures of recent galaxy close interactions and mergers in a sample of 202 early-type galaxies in the local
universe from the public SDSS Stripe82 deep images (μr ∼ 28.5 mag arcsec−2). Using two different ...
The Ca-K spectroheliograms obtained at the Kodaikanal observatory are used to generate a uniform time series
using the equal-contrast technique for studying the long- and short-term variations in the solar chromosphere. ...
It is the most appropriate time to characterize the Earth-like exoplanets in order to detect biosignature beyond the
Earth because such exoplanets will be the prime targets of big-budget missions like JWST, Roman ...
We present the first far-UV (FUV) imaging results of the intermediate-age Galactic open cluster NGC 2818 that
has a planetary nebula (PN) within the field using images taken from the Ultra Violet Imaging Telescope ...
We present ALMA Band-3/7 observations towards ‘the Heart’ of a massive hub-filament system (HFS) SDC335, to investigate
its fragmentation and accretion. At a resolution of ∼0.03 pc, 3 mm continuum emission resolves two ...
Modern large ground-based solar telescopes are invariably equipped with adaptive optics systems to enhance the high angular resolution imaging and spectroscopic capabilities in the presence of Earth's atmospheric turbulence. ...
There are at least two ways to deduce Einstein’s field equations from the principle of maximum force c4/4G
or from the equivalent principle of maximum power c5/4G
. Tests in gravitational wave astronomy, cosmology, and ...
Jalan, Priyanka; Rakshit, Suvendu; Woo, Jong-Jak; Kotilainen, Jari; Stalin, C. S(Oxford University Press on behalf of Royal Astronomical Society, 2023-05)
Measurement of black hole mass for low-z (z≤ 0.8) Active Galactic Nuclei (AGNs) is difficult due to the strong contribution
from host galaxy stellar light necessitating detailed spectral decomposition to estimate the AGN ...
Lata, Sneh; Chen, W. P; Pandey, J. C; Dileep, Athul; Ai, Zhong-Han; Hojaev, Alisher S; Panwar, Neelam; Joshi, Santosh; Mondal, Soumen; Biswas, Siddhartha; Bhatt, B. C(Oxford University Press on behalf of Royal Astronomical Society, 2023-03)
We present stellar variability towards the young open cluster NGC 6823. Time series V- and I-band CCD photometry led to
identification and characterization of 88 variable stars, of which only 14 have been previously ...
Aditya-L1 is India’s first observatory-class solar space mission to study the Sun from the
Lagrange L1 point. The Solar Ultra-Violet Imaging Telescope (SUIT) is one of the payloads
onboard Aditya-L1. SUIT is an off-axis ...
Halo coronal mass ejections (CMEs) from the Sun are the subset of CMEs, which are more
energetic than the normal CMEs. Only the more energetic CMEs are observable in whitelight coronagraphs when they are traveling along ...
With over 100 yr of solar observations, the Kodaikanal Solar Observatory (KoSO) is a one-of-a-kind solar data
repository in the world. Among its many data catalogs, the “suncharts” at KoSO are of particular interest. ...
Mallick, Anohita; Raghubar Singh; Reddy, B. E(American Astronomical Society, 2023-02-10)
In this work, we studied the distribution of lithium abundances in giants as a function of stellar mass. We used a
sample of 1240 giants common among Kepler photometric and LAMOST medium-resolution (R ≈ 7500)
spectroscopic ...
Dattatrey, Arvind K; Yadav, R. K. S; Sharmila Rani; Subramaniam, A; Singh, Gaurav; Sahu, Snehalata; Singh, Ravi S(American Astronomical Society, 2023-02-01)
We report the discovery of extremely low mass white dwarfs (ELM WDs) as a companion of blue straggler stars
(BSSs) in the Galactic globular cluster NGC 362 using images from AstroSatʼs Ultra Violet Imaging Telescope
(UVIT). ...
George, K; Poggianti, B. M; Tomicic, N; Postma, J; Cote, P; Fritz, J; Ghosh, S. K; Gullieuszik, M; Hutchings, J. B; Moretti, A; Omizzolo, A; Radovich, M; Sreekumar, P; Subramaniam, A; Tandon, S. N; Vulcani, B(Oxford University Press on behalf of Royal Astronomical Society, 2023-02)
Spiral galaxies undergo strong ram-pressure effects when they fall into the galaxy cluster potential. As a consequence, their
gas is stripped to form extended tails within which star formation can happen, giving them the ...
Dhiwar, Suraj; Saha, Kanak; Dekel, Avishai; Paswan, Abhishek; Pandey, Divya; Cortesi, Arianna; Pandge, Mahadev(Oxford University Press on behalf of Royal Astronomical Society, 2023-02)
We study the evolution of L∗ elliptical galaxies in the colour–magnitude diagram in terms of their star formation history and
environment, in an attempt to learn about their quenching process. We have visually extracted ...
Arellano Ferro, A; Rojas Galindo, F. C; Bustos Fierro, I. H; Muneer, S; Yepez, M. A; Giridhar, S(Oxford University Press on behalf of Royal Astronomical Society, 2023-02)
A 5-yr CCD photometric VI time series of NGC 7006 is employed to perform a detailed analysis of the known population of
variable stars. In the process, we have corrected inconsistent classifications, sky coordinates and ...
Paliya, Vaidehi S; Saikia, D. J; Stalin, C. S(Oxford University Press on behalf of Royal Astronomical Society, 2023-03)
The orientation of the jet axis to the line of sight of the observer plays a major role in explaining the phenomena observed
from blazars and radio galaxies. In the γ -ray band, only a handful of radio galaxies have been ...