LSST's promises for the transient sky and stripped envelope SNe at the verge of LSST

Federica Bianco (NYU) - February 26, 2017 at 12:10 pm

Astronomy at the verge of the LSST survey is changing rapidly. As the LSST Science Collaborations Coordinator, and chair of the Transients and Variable Stars Science Collaboration, I will discuss how the entire science community is preparing for this revolution. I will focus on the promises LSST holds for the study of the transient sky, and in particular for supernova (SN) science: tens of millions of stars will explode within the LSST footprint every year. I will further focus on a subset of SNe, stripped-envelope supernovae (SN IIb, SN Ib, SN Ic and broad-lined SN Ic), that despite being intrinsically as common as SN Ia, are far less well-studied and understood. They are the death throes of massive stars that lose their outer layer of hydrogen and helium before exploding, and may unlock our understanding of massive stars' death; they are cosmologically important as potential SN cosmology samples, especially photometrically selected samples, and although not trivially standardizable, they are cosmological relevant since they are associated with Gamma-Ray Bursts, the brightest beacons in the Universe. I will cover the current state of the field, discussing what we are learning about the stripped SN subtypes and their specific properties; I will discuss how we leverage machine learning methods to better understand these objects and outline a roadmap for the field: what is necessary to understand the genesis of each type of explosion, and what we need to prepare this field for the LSST era.

The seminar will be held in 131A Campbell Hall.

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