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SPS Seminar - Revealing how Galaxy Growth, Star Formation and Quenching proceed in High Redshift Galaxies with Spatially Resolved Space-based Slitless Spectroscopy

Dates
Thursday, September 9, 2021 - 14:00 to 15:00

When:  Thursday 9 September at 14.00

Where:  Microsoft Teams - Online

Speaker:  Jasleen Matharu - Texas A&M University

Hosted by: Hugh Dickinson

Abstract:

Space-based slitless spectroscopy capabilities on-board the Hubble Space Telescope have made it possible for us to conduct spatially resolved studies of high redshift galaxies for the first time. The future is truly slitless, with the James Webb Space Telescope and the Nancy Grace Roman Space Telescope vastly improving and capitalizing on the scientific gains we will make with this mode of observation. I will present the first spatially resolved H-Alpha emission line maps of cluster galaxies at z~1 made possible with the Wide Field Camera 3 G141 grism on-board the Hubble Space Telescope, revealing what they have taught us about environmental quenching at this crucial epoch in the history of cosmic star formation. I will also present new, deep spatially resolved H-Alpha emission line maps of CANDELS galaxies at z~0.5, made possible with the Wide Field Camera 3 G102 grism on-board the Hubble Space Telescope, and what these have unveiled on galaxy size growth via star formation at intermediate redshifts. By synthesizing the few existing spatially resolved studies of High-Redshift Galaxies between 0.5<z<1.7 we now have, I will provide the first results on how star formation propagates spatially in galaxies over time.

Bio:

Jasleen Matharu is currently a Postdoctoral Research Associate in the Department of Physics & Astronomy at Texas A&M University, where she works with Prof. Casey Papovich and Prof. Robert Kennicutt on research topics relating to the Formation and Evolution of Galaxies and Cosmic Reionisation. She is most interested in understanding the assembly and growth of galaxies and how this is affected by the large-scale environment within which galaxies reside. Having completed her PhD Thesis on “Quenching and Galaxy Growth in z~1 Clusters using HST WFC3 Grism Observations” under the supervision of Prof. Adam Muzzin at the Institute of Astronomy, University of Cambridge in 2019, she developed the unique skills and expertise needed to work with space-based slitless (or “grism”) spectroscopy and uses this mode of observation to help answer her research questions. Jasleen is a member of the James Webb Space Telescope Early Release Science Program CEERS (The Cosmic Evolution Early Release Science Survey) and the Cycle 1 Program WDEEP (The Webb Deep Extragalactic Exploratory Public Survey), both of which will use slitless spectroscopy capabilities to extend spatially resolved studies of galaxies to even higher redshifts in the Extended Growth Strip and the Hubble Ultra Deep Field.

 

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