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