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Astrophysics Seminar: "Finding the weirdest objects in large astronomical surveys" | The Racah Institute of Physics

Astrophysics Seminar: "Finding the weirdest objects in large astronomical surveys"

Date: 
Tue, 28/03/201712:30-13:30
Location: 
Racah Institute of Physics, Moadon (Beitan 9)
Lecturer: Mrs. Dalya Baron Affiliation: Department of Astronomy and Astrophysics, Tel-Aviv University Abstract: How can we discover in large astronomical surveys objects we did not know existed? I will present our recent work (Baron & Poznanski 2017) where we developed an outlier detection algorithm and tested it on 2.5 million galaxy spectra from the Sloan Digital Sky Survey. I will briefly discuss the algorithm and its main strengths. I will then show its success in identifying interesting objects of many kinds. Finally, I will focus on a specific galaxy that we discovered with our algorithm, and obtained Keck high-resolution spectroscopy of. The galaxy is an E+A post starburst galaxy in which we detect AGN-driven winds as massive as the outflows observed in ultra luminous infrared galaxies. I will discuss how galaxies such as these could fit in the broader picture of galaxy evolution. Additional details of the upcoming Astrophysics' seminars can be found on the following link. ‏האירוע הזה כולל שיחת וידאו ב-Google Hangouts. הצטרף: https://plus.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.gbrbpd4rgq055gdb80q6igni60&hs=121