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IF Colloquium No.31 – Tracing out the darkness with cold gas: dynamically probing galaxy evolution and black holes
August 30, 2024 @ 3:30 pm - 4:30 pm
📣 IF invites you to the No.31 IF Colloquium (Online Seminar Series)
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📌 Title: ” Tracing out the darkness with cold gas: dynamically probing galaxy evolution and black holes ”
📌 Speaker : Dr.Timothy A Davis , DPhil(Oxon), FRAS,
Reader at the Cardiff Hub for Astrophysics Research and Technology (CHART), Cardiff University, UK
📌 Abstract : In this talk I will describe how mapping the dynamics of gas clouds in the centre of galaxies can help us to constrain a wide range of astrophysical problems. From the enigmatic relation between galaxies and their supermassive black holes, to the suppression of star-formation in dying galaxies, the dynamics of cold gas provides an ideal probe that can help us make progress. I will show how parsec resolution ALMA observations can be used to estimate the masses of supermassive black holes in galaxies across the Hubble sequence, both dynamically, and via the newly discovered ‘fundamental plane of black hole accretion in the millimetre”. I will describe the WISDOM and WONDER projects, that aims to use this technique to constrain the importance of accreting SMBHs in galaxy quenching. I will go on to show that, contrary to expectations, molecular gas appears to be an important source of fuel for accretion in even low-luminosity, low-excitation active SMBHs. Finally, I will show that the deep potential wells of massive galaxies change the small-scale structure of the ISM, suppressing star formation, and helping to keep bulge-dominated objects quenched.
📌 Keywords : Cold gas, Galaxy Evolution, Black Holes
📌 15:30 – 16:30 p.m. Friday, August 30, 2024
📌 Venue: Academia Room (TA212), 2nd Floor, Mahadhammaraja A Building
📌 IF Channel : https://www.youtube.com/live/qF8UCEdHFVM?si=bYKv42V0gTMAIgY9
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#Cosmology #Physics #TheoreticalPhysics #IFNU #PhysicsNaresuan #IFColloquium