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400 papers · 1 filter
Finding the evolutionary link between ULIRGs and radio galaxies
Ayisha Fida, Sumana Nandi, Mousumi Das +4
Ultraluminous infrared galaxies (ULIRGs) are the remnants of the major mergers of gas-rich galaxies. They are dusty systems and are extremely luminous in the infrared. Both starbur…
Radio emission from ultra-diffuse galaxies residing in galaxy clusters
Dharam V. Lal, Jeyasiona Murugesh
Ultra-diffuse galaxies (UDGs), defined by their extremely low surface brightness (-band mag arcsec) and large effective radii (3--10 arcsec), remain one of…
Star Formation at the Periphery of a Molecular Superbubble: The Case of G12.79+0.43
Arun Seshadri, Veena V. S., Sarita Vig +1
We present a multiwavelength investigation of the molecular cloud complex G12.79+0.43, which extends over on the sky. Several infrared- and radio-bright regions are arran…
uGMRT and MeerKAT observation of RXCJ0232-4420: a quiet cluster with a giant radio halo
Pralay Biswas, Ramananda Santra, Ruta Kale +1
Giant radio halos are the Mpc-scale extended sources associated with the merging clusters, while the mini-halos are preferentially associated with cool-core clusters. Both trace th…
Could the high-mass black holes from gravitational-wave observations be explained by lensing?
Ritesh Harshe, R. Prasad, Parameswaran Ajith
The high-mass () black holes (BHs) from the gravitational-wave (GW) observations of LIGO and Virgo came as a surprise to many astronomers. While the collapse…
AstroSat-UVIT observations of a possibly interacting pair of galaxies in HCG 77
Anshul Srivastava, Harvinder K. Jassal, Mamta Gulati +1
We aim to study star-forming regions and the spectral energy distribution of two possibly interacting galaxies, PGC 56121 and PGC 56125, in the Hickson Compact Group 77. We utilize…
MOSS II: Mid frequency radio catalog of Saraswati core region
Robert Kincaid, Edwin Retana-Montenegro, Bruno Slaus +6
The MeerKAT Observations of the Saraswati Supercluster (MOSS) is an ongoing project attempting to study the radio and optical properties of the core region of the Saraswati supercl…
G183: An outer galaxy filament feeding a massive protostar
Bhaswati Mookerjea, Saurav Sen, V. S. Veena +1
We present the first detailed multi-tracer observation of a 5-pc long outer Galaxy filament, G183, and the massive young stellar object (YSO) IRAS 05480+2545 associated with it. Us…
E-XQR-30: Evidence for an Increase in the Ionization State of Metal Absorbers from z~6 to z~2
Stephanie Rowlands, R. L. Davies, E. Ryan-Weber +15
We investigate the evolution of the ionization state of metal-enriched gas in and around galaxies near the epoch of reionization using a sample of 488 metal absorption systems at 4…
FIRESTORM I: Stellar Feedback and Gas Kinematics in the Evolved W40 Hub-Filament System
Ming-Kang Lim, Ram K. Yadav, L. K. Dewangan +12
The FIRESTORM project--Feedback-Induced Regions and Emission from Star-forming Tracers of ObseRvable Molecular Gas--has targeted four star-forming regions to quantify the impact of…
On Constraining the Proposed Hierarchical Triple Scenario for an Eccentric Milli-Second Pulsar Binary PSR J1618-3921
Adya Shukla, A. Gopakumar, Paramasivan Arumugam
A very recent and meticulous timing effort suggests that an eccentric millisecond pulsar (eMSP) binary, namely PSR J1618-3921, is likely to be a part of a hierarchical triple (HT)…
A Comprehensive Multiwavelength Study of the OH Megamaser galaxy IRAS 09320+6134
Claudia M. Cassanta, Rogemar A. Riffel, Andrew Robinson +7
We present a multiwavelength study of the gas distribution, kinematics and excitation of the OH megamaser galaxy IRAS 09320+6134 (UGC 5101) using Gemini Multi-Object Spectrograph I…
Investigating silicate, carbon, and water in the diffuse interstellar medium: the first shots from WISCI
S. T. Zeegers, Jonathan P. Marshall, Karl D. Gordon +33
The dusty interstellar medium (ISM) of the Milky Way is distributed in a complex, cloudy structure. It is fundamental to the radiation balance within the Milky Way, provides a reac…
Star formation at different stages of ram-pressure stripping as observed through far-ultraviolet imaging of 13 GASP galaxies
Koshy George, B. M. Poggianti, B. Vulcani +12
Galaxies undergoing ram-pressure stripping develop gaseous tails that can extend several kiloparsecs outside the galaxy disc. We used far-ultraviolet and H imaging from the GASP…
Extreme AGN feedback in the fossil galaxy group SDSSTG 4436
D. Eckert, F. Gastaldello, L. Lovisari +20
Supermassive black hole feedback is the currently favoured mechanism to regulate the star formation rate of galaxies and prevent the formation of ultra-massive galaxies ($M_\star>1…
Modeling Gravitational Wave Bias from 3D Power Spectra of Spectroscopic Surveys
Dorsa Sadat Hosseini, Amir Dehghani, J. Leo Kim +3
We present a framework for relating gravitational wave (GW) sources to the astrophysical properties of spectroscopic galaxy samples. We show how this can enable using clustering me…
Star formation efficiency and scaling relations in parsec-scale cluster-forming clumps
V. Rawat, M. R. Samal, A. Zavagno +5
Numerical simulations predict that clumps (1 pc) should form stars at high efficiency to produce bound star clusters. We conducted a statistical study of 17 nearby cluster-fo…
A [CII]-158-micron Survey of DLA galaxies at z~4: Observations of Dense and Metal-Enriched Neutral Gas within the Circumgalactic Medium of Star-Forming Galaxies
Marcel Neeleman, Nissim Kanekar, J. Xavier Prochaska +2
We present a survey undertaken with the Atacama Large Millimeter/submillimeter Array (ALMA) to study the galaxies associated with a representative sample of 16 damped Ly-alpha abso…
Probing Reionization-Era Galaxies with JWST UV Luminosity Functions and Large-Scale Clustering
Anirban Chakraborty, Tirthankar Roy Choudhury
JWST has transformed our understanding of early galaxy formation, providing an unprecedented view of the first billion years of cosmic history. In this work, we build upon our prev…
Research on the Interstellar Medium and Star Formation in the Galaxy: An Indian Perspective
Bhaswati Mookerjea, Maheswar G., Kinsuk Acharyya +24
Although the star formation process has been studied for decades, many important aspects of the physics involved remain unsolved. Recent advancement of instrumentation in the infra…
The Quasar Feedback Survey: zooming into the origin of radio emission with e-MERLIN
Ann Njeri, Chris M. Harrison, Preeti Kharb +7
We present 6 GHz e-MERLIN observations of 42 type 1 and type 2 mostly radio-quiet quasars ( erg s; erg s$^{-…
Evidence for the gravity-driven and magnetically-regularized gas flows feeding the massive protostellar cluster in Cepheus A
Panigrahy Sandhyarani, Chakali Eswaraiah, Di Li +8
The hierarchical interplay among gravity, magnetic fields, and turbulence in forming massive protostellar clusters remains elusive. We present high-resolution (14 arcsec $\si…
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…