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09:15 to 09:30 |
Rajesh Gopakumar (ICTS-TIFR, Bengaluru, India) |
Welcome remarks |
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09:30 to 10:00 |
Annapurni Subramaniam (IIA, Bengaluru, India) |
Formation pathway of extremely low mass White dwarfs (Online) |
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10:00 to 10:30 |
Namrata Roy (RRI Bengaluru, India) |
Mapping Feedback across Cosmic Scale and Time How galaxies grow, exchange matter with their surroundings, and shut down star formation is ultimately a problem of connecting scales from sub-parsec black-hole accretion to kiloparsec-scale interstellar medium and hundred-kiloparsec circumgalactic gaseous reservoirs. I will discuss how recent multi-wavelength observations, along with spatially resolved spectroscopy from JWST, HST and ground based Keck, Magellan, VLT are beginning to resolve this connection across cosmic time.
I will present spatially resolved studies of galaxies in two complementary regimes. At very high redshifts, JWST is revealing that both star formation and radio-loud active galactic nuclei can drive fast, energetic outflows when the Universe was still young. In the strongly lensed galaxy at z=6.2 for example, JWST IFU resolves a star-formation-driven biconical outflow in extreme detail, showing that spatially integrated spectra can substantially underestimate the local strength of feedback. On the other hand, at low redshift, black-hole activity is often much weaker, but it still plays a crucial role by gently heating, stirring, or redistributing the remaining gas in quiet, passive systems. I will end by outlining our group’s effort to connect the huge spatial scale between the interstellar and circumgalactic medium via various observations. Looking ahead, the combination of NASA’s JWST, HST, Roman, radio facilities like GMRT, LOFAR, SKA, and next-generation Indian observatories will help us move on from detailed case studies to statistical, multi-wavelength views of galaxies and their halos.
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10:30 to 10:50 |
Advay Almal (Ashoka University, Haryana, India) |
Investigating Hubble Dark Galaxies at Cosmic Noon and Beyond with JWST MINERVA |
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10:50 to 11:10 |
Shivangi Jain (VIT, Vellore, India) |
The Evolution of Radio Properties of Quasars |
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11:40 to 12:10 |
Sushma Kurapati (NCRA, Pune, India) |
Gas Dynamics and Angular Momentum with the Ultra deep MHONGOOSE Survey The interplay between gas accretion, feedback, interactions, and galactic dynamics plays a crucial role in shaping the structure and evolution of galaxies. These processes can alter both the distribution and kinematics of the gas, making resolved HI observations a powerful way to probe their signatures across galactic discs and into their outskirts. The ultra-deep MHONGOOSE survey with MeerKAT uniquely combines high spatial resolution with exceptional column-density sensitivity, allowing us to trace HI kinematics from the inner disc to the faint outer regions at column densities previously inaccessible to interferometric surveys. Across 30 nearby galaxies spanning a wide range of masses and morphologies, the observations reveal a striking diversity, from regularly rotating discs to systems with warps, extraplanar gas, extended filaments, faint companions, and strongly disturbed outer structures. I will present examples of such systems and results from kinematic modelling of the full sample, tracing rotation from the inner disc into the low-column-density outskirts. I will also discuss how these resolved kinematics connect to galaxy scaling relations, including the baryonic Tully–Fisher relation. Finally, I will present spatially resolved specific angular momentum–mass (j–M) relations for stars, HI, and baryons. The global relations for stars and HI have markedly different slopes, about 0.55 for stars and close to unity for HI. By resolving how angular momentum builds up with radius, we can see how these contrasting global trends arise, while also revealing variations within individual galaxies that are not apparent from integrated global measurements alone.
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12:10 to 12:40 |
Veena V S (TIFR Mumbai, India) |
A Fountain at the End of the Bar Resolving the Milky Way Nuclear Gas Cycle The cycling of baryonic matter into and out of galactic nuclei links the supply of gas to star formation, black hole growth, and feedback. Understanding how these processes connect requires tracing gas from inflowing streams, through the central reservoir, and into outflows, a task for which the proximity of the Milky Way’s Galactic centre offers a distinct advantage. Although the Milky Way does not host an active galactic nucleus, its centre contains a dense, turbulent molecular reservoir, bar-driven gas streams, and outflows extending far from the Galactic plane. In this talk, I will introduce this environment and present recent results on inflowing streams and molecular gas in the Galactic wind. I will discuss what these observations reveal about the fate of gas: whether it accumulates, forms stars, feeds the central black hole, or is expelled, potentially returning as part of a galactic fountain.
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12:40 to 13:00 |
Salmoli Ghosh (NCRA, Pune, India) |
The Relevance of Magnetic Fields in Low power Astrophysical Jets A Radio Polarimetric View of Seyfert LINER Galaxies |
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14:00 to 14:20 |
Aminabi Thekkoth (NCRA, Pune, India) |
From Extended Lobes to Active Cores Exploring Radio Jet Evolution with uGMRT LOFAR and VLA |
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14:20 to 14:50 |
Niruj Mohan Ramanujam (IIA, Bengaluru, India) |
Building equitable astronomy communities - broadening equity and rethinking communities (Online) In this talk, I will try and discuss equity in astronomy in a broader context of multiple discriminated identities like caste, class, disability, LGBTQI, etc. I will also discuss how an expanded notion of the astronomy community can promote equity and diversity, especially in the context of public engagement with astronomy.
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14:50 to 15:10 |
Santhiya P S (ICTS-TIFR, Bengaluru, India) |
Explaining Polarization Signatures of Black Hole Accretion Flows |
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15:10 to 15:40 |
Osase Omoruyi (Princeton University, New Jersey, USA) |
Black Hole Feedback through Heating Rather than Ejection: A Multiphase View of the Most Massive Galaxies |
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