Highlights

Prime Minister's Research Fellowship <Accomplishment>

Received "Recommended with Commendation" acknowledgement in the PMRF review, which is the highest recognition available to offer in the PMRF review processes.

[Posted as per the request of PMRF Coordination Committee]

<Commendable Research Acknowledgement>

My research has been ranked within the top 20 Commendable research performances among the Prime Minister’s Research Fellows in India in Interdisciplinary Areas of Science and Engineering:

10-ID-Commendable Research WorksPMRF, guidelines, lateral entry, direct entry, deliverables, fellowship

'AWSAR' Award!

My research on precessing jets, rewritten in the format of a story, has been selected for the top 100 best stories of 2022 AWSAR award.

https://awsar-dst.in/results-2022

Popular Coverages

Articles in "CosmicVarta"

Bending of Cosmic fountains, giving birth to a peculiar X-shaped galaxyWhen observed with a radio telescope, a giant peculiar X-shaped morphology is seen in some galaxies. It is difficult to understand what gives rise to such peculiar morphology; And, to date, this is a topic of debate among astronomers themselves.

Why are some jets curved: presence of dancing blackholes?A small percentage of the ejected hot plasma flows (the jets) from supermassive blackholes are observed to deviate from their intended path, resulting in unusual jetted morphologies. One of these peculiarities appears when the jet starts to dance /precess around an axis, forming curved jets with S-shaped morphology. When we observe such sources through radio telescopes, we see a massive S-like structure floating in the vast cosmos. Due to their peculiar morphology, the formation mechanism of such sources is still debated. Simultaneously, an increasing number of such sources are being discovered with even more complex S-shaped structures, making the unravelling of the underlying physics more difficult than earlier.

Collisions between galaxies: A frequent phenomenon than we expected earlierInitially, early-type galaxies were considered aged, evolved systems with a reddish appearance, primarily comprising older stars and lacking young star formation due to limited gas and dust resources. However, contemporary techniques, such as integral field spectroscopy for studying star motion within galaxies and advanced telescopes with heightened sensitivity, have brought forth surprising discoveries. These discoveries have unveiled significant reservoirs of gas and dust, as well as intricate stellar structures hidden beneath the seemingly uniform distribution of stars in many of these galaxies. This article explores the potential origins of these intriguing phenomena occurring on a galactic scale.

Bending/Flipping/Reorienting: Superheated plasma outflow from supermassive blackhole producing ‘X’-like fountainsEmbark on a cosmic journey as Gourab Giri explores the enigmatic X-shaped structures observed in radio galaxies, formed by the ejection of jets from supermassive black holes.

Articles in "astrobites"

Galactic Renaissance: A Surge in Star Formation During the Evolution of Galactic CollisionsGalaxy mergers represent a transformative evolutionary path, inducing notable morphological and compositional changes in the involved galaxies. The alterations in the intrinsic characteristics duri…

Galactic Jets in Motion: Unveiling the Dance of Cosmic GhostsPlasma jets, emerging from a galaxy’s central black hole, sometimes bend in the same direction, forming head-tail structures. A recent study investigated two such galaxies found in unexpected…

Social Outreach!

Astronomy outreach (videography) in regional language (Bengali): self-initiative using social platform.

Press releases

Supercomputer simulations of giant radio galaxy formation challenge current theoretical modelsEnabled by supercomputing, University of Pretoria (UP) researchers have led an international team of astronomers that has provided deeper insight into the entire life cycle (birth, growth and death) of giant radio galaxies, which resemble "cosmic fountains"—jets of superheated gas that are ejected into near-empty space from their spinning supermassive black holes.

Christ University and University of Pretoria collaborate to study sizes of galaxiesThe work was done by an international team, led by Gourab Giri (University of Pretoria) and Prof Joydeep Bagchi (Christ University, Bangalore). The team includes researchers from the University of Pretoria the University of Cape Town in South Africa and the Inter-University Centre for Astronomy and Astrophysics (IUCAA) in India.

Black holes spew out powerful jets that span millions of light-years – we’re trying to understand their whole life cycleUnderstanding the evolution of radio galaxies is crucial for unravelling the broader processes that shape the universe.

Probing the formation of megaparsec-scale giant radio galaxies – The Mail & GuardianDynamical insights from magnetohydrodynamic simulations First Author: Gourab Giri Authors: Joydeep Bagchi, Kshitij Thorat, Roger P. Deane, Jacinta Delhaize, Dhr

UP-Led Astronomy Research Team Explores Formation of Giant Radio Galaxies | NewswiseEnabled by supercomputing, UP researchers have led an international team of astronomers that has provided deeper insight into the entire life cycle (birth, growth and death) of giant radio galaxies, which resemble “cosmic fountains” – jets of superheated gas that are ejected into near-empty space from their spinning supermassive black holes.

University Of Pretoria-Led Astronomy Research Team Explores Formation Of Giant Radio Galaxies - The BulrushesPretoria – Enabled by supercomputing, University of Pretoria (UP) researchers have led an international team of astronomers that has provided deeper insight into the entire life cycle of giant radio galaxies, which resemble “cosmic fountains”. This study tackles a key question in modern astrophysics: how these structures, which are larger than galaxies and are made […]

Supercomputer simulations of giant radio galaxy formation challenge current theoretical models - Tech and Science PostEnabled by supercomputing, University of Pretoria (UP) researchers have led an international team of astronomers that has provided deeper insight into the entire life cycle (birth, growth and death) of giant radio galaxies, which resemble “cosmic fountains”—jets of superheated gas that are ejected into near-empty space from their spinning supermassive black holes. The findings of this breakthrough study were published in the journal Astronomy & Astrophysics, and challenge known theoretical models by explaining how extragalactic cosmic fountains grow to cover […]

Astronomical Discovery | New insights into giant radio galaxiesAn international team of astronomers, led by researchers from the University of Pretoria, has made significant advances in understanding the life cycle of giant radio galaxies.

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