ZTF Science Vlog

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Welcome to our Science Vlog

Hear lead authors from the ZTF team present their latest scientific publications.

A ZTF sample of low-mass supernovae and what it reveals about the mysterious fate of these stars

Date: Nov, 2022

The next issue of our science vlog brings you Kaustav Das, a PhD student at Caltech whose latest paper describes the analysis of a sample of strongly-stripped Calcium-rich Type IIb Supernovae from the Zwicky Transient Facility. The fate of such low-mass stars in still a mystery and growing samples such as this one can reveal more about how these stars die and what they turn into.

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A rare supernova SN 2022oqm blasts out fast material a few weeks before explosion

Date: Oct, 2022

In this science vlog, Ido Irani from the Weizmann Institute of Science gives us an excellent summary of a peculiar Type Ic supernova SN2020oqm. Discovered less than a day from explosion, it reveals a fast moving C/O circumstellar material and a Ca-rich late light curve.

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Is SN2020jgb supernova holding the key to understanding these cosmic candles?

Date: Sept, 2022

In the next ZTF science vlog, Chang Liu from the Northwestern University walks us through the discovery of a peculiar Type Ia supernova, dubbed SN2020jgb. While a detonation of a thin helium shell on a white dwarf is believe to be a plausible mechanism for these supernovae, variations in the size/mass of the white dwarf and the helium shell may explain some of the peculiar supernovae observed lately. The analysis reveals SN2020jgb as a thick helium double detonation supernovae and it's the first such object discovered in a start forming galaxy.

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Lessons from the ZTF neutrino multi-messenger campaign

Date: Jun, 2022

In this science vlog, Robert Stein (Caltech) shares exciting results from the first 24 neutrino followup campaigns with ZTF. These include the first association of a high energy neutrino with a tidal disruption event (published in Feb 2021 in Nature Astronomy) and another fresh paper published in June 2022 in the Physical Review Letters describing a second association.

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Supernova Siblings in the Zwicky Transient Facility Survey

Date: March, 2022

Melissa Graham from the University of Washington, Seattle has sieved through ZTF data in search of supernova siblings - two or more supernovae in the same parent galaxy. The analysis of her sample confirms known facts about these objects and yields new surpises as well.

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ZTF captures the lastest sample of the brightest supernovae

Date: March, 2022

In this vlog, PhD student Zhihao Chen presents the largest sample of superluminous supernovae. A comprehensive lightcurve analysis sheds more light on the mechanisms that fuel these super bright cosmic flares.

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How ZTF Type Ia supernova sample can advance cosmology

Date: Jan, 2022

Suhail Dhawan from Cambridge University in the UK, summarizes his latest study on how the current and growing sample of Type Ia supernovae discovered by ZTF can answer important questions in precision cosmology. Early phase sampling , large statistics with a single system and a uniformly observed all-sky Hubble flow sample offer tantalizing opportunities to improve our cosmology models.

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Discovering microlensing events with the ZTF

Date: Dec, 2021

Tony Rodriguez, a PhD student at Caltech talks about his recent work on discovering of microlensing events in the ZTF public survey data and using these discoveries to ultimately detect and study "dark objects" in the universe such as free floating planets, brown dwarfs, and elusive stellar mass black holes.

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Discovery of a stellar mass black hole candidate

Date: Nov, 2021

Originally first discovered in X-ray, black hole binaries can now be discovered directly in optical thanks to wide-field optical surveys such as the ZTF. In this science blog, Yuhan Yao, a PhD student at Caltech shares the discovery of AT2019wey, a candidate black hole binary and the follow up multiwavelength analysis.

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The faintest of them all

Date: Oct, 2021

Lead author Viraj Karambelkar (PhD student at Caltech) talks about the discovery of SN2021fcg which is the faintest supernova of Type Iax discovered to date. Why and how is this discovery helping us understand the evolution of stars?

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Tracing the cosmic web with supernovae

Date: Sept, 2021

Lead author Eleni Tsaprazi (PhD at the OKC, Sweden) talks about the potential and first result of using large supernovae surveys to explore the large-scale structure of the universe at high redshifts.

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Searching for fast transients in real time

Date: Sept, 2021

Lead author Igor Ansdreoni (UMD/NASA GSFC) and co-author Michael Coughlin (U of Minnesota) present a new pipeline for the search of fast transients in real time and discuss first results during LIGO observing run O3.

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Rapidly Evolving Extragalactic Transients in ZTF

June, 2021

Anna Ho, a Miller postdoctoral Fellow at UC Berkeley shares the three main take aways from her receint publication "The Photometric and Spectroscopic Evolution of Rapidly Evolving Extragalactic Transients in ZTF"

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Near real-time classification of Type Ia supernovae with deep learning algorithms

Date: May, 2021

In this video, lead author Christoffer Fremling (postdoctoral fellow at Caltech) presents his latest work on a deep learning system for automated classifications of Type Ia supernovae. Dubbed SNIascore, the system can classify spectra and report confirmed supernovae to the Transient Name Server almost in real time!

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