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17 papers · 2 filters
The Gravitational Wave Bias Parameter from Angular Power Spectra: Bridging Between Galaxies and Binary Black Holes
Amir Dehghani, J. Leo Kim, Dorsa Sadat Hosseini +3
This study presents the modeling of the gravitational wave (GW) bias parameter by bridging a connection between simulated GW sources and galaxies in low redshift galaxy surveys 2MP…
Ageing and dynamics of the tailed radio galaxies in Abell 2142
L. Bruno, T. Venturi, D. Dallacasa +11
Context. Tailed radio galaxies are shaped by ram pressure owing to the high-velocity motion of their host through the intracluster medium (ICM). Recent works have reported on the i…
The impact of faint AGN discovered by JWST on reionization
Shikhar Asthana, Martin G. Haehnelt, Girish Kulkarni +4
The relative contribution of emission from stellar sources and accretion onto supermassive black holes to reionization has been brought into focus again by the apparent high abunda…
Peering into the Heart of the Giant Molecular Cloud G148.24+00.41: A Deep Near-infrared View of the Newly Hatched Cluster FSR 655
Vineet Rawat, M. R. Samal, D. K. Ojha +5
We present a detailed near-infrared study of an embedded cluster located in the hub of the giant molecular cloud G148.24+00.41 of mass 10 , with the TANSPEC inst…
HI Imaging of a Blueberry Galaxy Suggests a Merger Origin
Saili Dutta, Apurba Bera, Omkar Bait +3
Blueberry galaxies (BBs) are fainter, less massive, and lower redshift counterparts of the Green pea galaxies. They are thought to be the nearest analogues of the high redshift Lym…
Sloshing and spiral structures breeding a putative radio mini-halo in the environment of a cool-core cluster Abell 795
S. K. Kadam, Sameer Salunkhe, N. D. Vagshette +4
Spiral structures and cold fronts in X-rays are frequently observed in cool core galaxy clusters. However, studies on radio mini-haloes associated with such spirals and their physi…
Structure and Kinematics of Star-forming Elliptical Galaxies in SDSS-MaNGA
Pralay Biswas, Yogesh Wadadekar
Using 'spatially' resolved spectroscopy, we investigated the characteristics and different modes of formation of stars in elliptical galaxies. We identified an unusual population o…
Kinematics Star Formation in the Hub-Filament System G6.55-0.1
Saurav Sen, Bhaswati Mookerjea, Rolf Guesten +2
Hub-filament systems (HFSs) being the potential sites of formation of star clusters and high mass stars, provide a test bed for the current theories that attempt to explain star fo…
Evidence of Pop~III stars' chemical signature in neutral gas at z~6. A study based on the E-XQR-30 spectroscopic sample
Alessio Sodini, Valentina D'Odorico, Stefania Salvadori +16
This study explores the metal enrichment signatures attributed to the first generation of stars (PopIII) in the Universe, focusing on the E-XQR-30 sample. We aim to identify traces…
JWST observations of CO ice: Tracing the chemical environment and thermal history of ices in protostellar envelopes
Nashanty G. C. Brunken, Will R. M. Rocha, Ewine F. van Dishoeck +38
The structure and composition of simple ices can be modified during stellar evolution by protostellar heating. Key to understanding the involved processes are thermal and chemical…
Radio-loud fraction of z>6 quasars
Pascal M. Keller, Nithyanandan Thyagarajan, Ajay Kumar +2
Quasars at redshifts are an excellent probe of the formation and evolution of supermassive black holes in the early Universe. The population of radio-luminous quasars is of p…
Study of Star-formation in Dual Nuclei Galaxies using UVIT observations
K. Rubinur, M. Das, P. Kharb +3
We have used the Ultraviolet Imaging Telescope (UVIT) aboard AstroSat to study star formation in a sample of nine dual nuclei galaxies with separations ~11 kpc, which is an expecte…
Hunt for complex cyanides in protostellar ices with JWST: Tentative detection of CHCN and CHCN
P. Nazari, W. R. M. Rocha, A. E. Rubinstein +20
Nitrogen-bearing complex organic molecules have been commonly detected in the gas phase but not yet in interstellar ices. This has led to the long-standing question of whether thes…
The Giant Molecular Cloud G148.24+00.41: Gas Properties, Kinematics, and Cluster Formation at the Nexus of Filamentary Flows
Vineet Rawat, M. R. Samal, D. L. Walker +9
Filamentary flows toward the centre of molecular clouds have been recognized as a crucial process in the formation and evolution of stellar clusters. In this paper, we present a co…
Understanding the relative importance of magnetic field, gravity, and turbulence in star formation at the hub of the giant molecular cloud G148.24+00.41
Vineet Rawat, M. R. Samal, Chakali Eswaraiah +10
The relative importance of magnetic fields, turbulence, and gravity in the early phases of star formation is still not well understood. We report the first high-resolution dust pol…
Spatio-temporal map of star clusters in the Magellanic Clouds using Gaia: Synchronized peaks and radial shrinkage of cluster formation
S. R. Dhanush, A. Subramaniam, Prasanta K. Nayak +1
We present a detailed view of cluster formation (CF) to trace the evolution and interaction history of the Magellanic Clouds (MCs) in the last 3.5 Gyr. Using the \textit{Gaia} DR3…
Tracing the layers of Photodissociated gas in Trifid Nebula
Bhaswati Mookerjea, Goeran Sandell
Photodissociated gas bears the signature of the dynamical evolution of the ambient interstellar medium impacted by the mechanical and radiative feedback from an expanding HII regio…