Calendar

Oct
17
Wed
ASTR 545 – Stellar Spectroscopy
Oct 17 @ 11:00 am – 12:15 pm
Astro-ph Discussion
Oct 17 @ 1:30 pm – 2:00 pm
Galaxy Group meeting
Oct 17 @ 2:30 pm – 3:00 pm
Astr110 Observatory
Oct 17 @ 9:00 pm – 10:00 pm
Oct
18
Thu
ASTR 620 – Planetary Processes
Oct 18 @ 8:55 am – 10:10 am
ASTR 555 – Galaxies I
Oct 18 @ 11:45 am – 1:00 pm
Machine Learning Cafe
Oct 18 @ 2:00 pm – 3:00 pm
Inclusive Astronomy
Oct 18 @ 4:00 pm – 5:00 pm
Oct
19
Fri
Astro-ph Discussion
Oct 19 @ 11:30 am – 12:00 pm
Colloquium: Sanchayeeta Borthakur (Host: Kristian Finlator)
Oct 19 @ 3:15 pm – 4:15 pm
Colloquium:  Sanchayeeta Borthakur (Host: Kristian Finlator) @ BX102

Understanding How Galaxies Reionized the Universe

 Sanchayeeta Borthakur, Arizona State University

Identifying the population of galaxies that was responsible for the reionization of the universe is a long-standing quest in astronomy. While young stars can produce large amounts of ionizing photons, the mechanism behind the escape of Lyman continuum photons (wavelength < 912 A) from star-forming regions has eluded us. To identify such galaxies and to understand the process of the escape of Lyman continuum, we present an indirect technique known as the residual flux technique. Using this technique, we identified (and later confirmed) the first low-redshift galaxy that has an escape fraction of ionizing flux of 21%. This leaky galaxy provides us with valuable insights into the physics of starburst-driven feedback. In addition, since direct detection of ionizing flux is impossible at the epoch of reionization, the residual flux technique presents a highly valuable tool for future studies to be conducted with the upcoming large telescopes such as the JWST.