Astrophysical Sciences and Technology Colloquium: A 13 Billion Year Old Cosmic Story told using Narrowband Surveys
Astrophysical Sciences and Technology Colloquium
A 13 Billion Year Old Cosmic Story told using Narrowband Surveys
Dr. Ali Ahmad Khostovan
Post Doctoral Research Associate
School of Physics and Astronomy, RIT
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Abstract:
One of the main goals in all of extragalactic astrophysics is understanding how galaxies became the structures that we see today, even the Milky Way that we call home. Large narrowband surveys have aided in mapping out this cosmic timeline by photometricallyobserving star-forming galaxies using their nebular emission lines that are associated with active star-formation. In this talk, Dr. Khostovanwill present the great amount of work that he and his collaborators have done as part of the HiZELS, SC4K, DAWN, and LAGER surveys where they have investigated various properties of star-forming galaxies ranging from statistical population properties (e.g., luminosity functions), mapping out their star-formation histories, interstellar medium properties, and large-scale structure. He will also discuss how their work has implications for future facilities, such as the Nancy Grace Roman Space Telescope, Euclid, and the highly anticipated JWST and how his latest work builds upon this.
Speaker Bio:
Dr. Ali Ahmad Khostovanis an early-career extragalactic astrophysicist with expertise on investigating star-forming galaxies using narrowband surveys. Ali Ahmad received his B.S. in Physics in 2012 from UC Irvine working with AsanthaCoorayon dusty star-forming galaxies using the Herschel Space Telescope. Ali Ahmad was later awarded the NESSF PhD fellowship in 2016 and received his Ph.D. in 2018 from UC Riverside working with Bahram Mobasherand David Sobral(Lancaster University) with a focus on star-forming galaxies observed using narrowband surveys. He then joined SangeetaMalhotra and James Rhoads as a NASA Postdoctoral Program Fellow at Goddard Space Flight Center working on the DAWN and LAGER surveys. In September 2021, he joined Jeyhan Kartaltepe’sgroup at RIT focusing on an archival spectroscopic survey of the COSMOS legacy field.
Intended Audience:
All are welcome. Those with interest in the topic.
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