Iair Arcavi
/ya'eer/

Postdoc [einstein fellow]
p. 1: observational astronomer at UC Santa Barbara and Las Cumbres Observatory; studying core collapse supernovae, tidal disruption events and other transients. 2: developer of The Supernova Exchange. 3: organizer of Astronomy on Tap Santa Barbara. 4: amateur photographer. 5: chocolate addict.


About Me

I did my undergraduate studies in math and physics at Tel Aviv University between 2004 and 2007, and received my PhD in astrophysics from the Weizmann Institute of Science in 2013. From 2013 to 2016 I was a post-doc at Las Cumbres Observatory and the Kavli Institue for Theoretical Physics at UC Santa Barbara. I am now an Einstein Fellow at the Physics Dept. of UC Santa Barbara.

See my CV for more information.
Contact me at arcavi@ucsb.edu or iarcavi@lco.global


Research

Supernovae

Which massive stars explode as the different types of core collapse supernovae we observe? We're gaining indirect constraints one this question by looking at large samples of light curves (Arcavi et al. 2012), by studying at the statistical host-galaxy properties of the different supernova types (Arcavi et al. 2010, Arcavi 2012), and by finding supernovae soon after explosion and getting very rapid followup observations of them (Arcavi et al. 2011, Arcavi et al. 2017a).
For a review of some of these topics see my chapter on hydrogen rich supernovae in the Supernova Handbook.



Tidal Disruption Events

We've recently identified a new class of transients that occur only in galaxy centers, and are therefore very likely to be the tidal disruptions of stars by supermassive black holes (Arcavi et al. 2014). Surprisingly, the emission from these transients peaks in the UV rather than the X-rays (as expected if the emission were coming directly from an accretion disk), they show broad He II emission (and only sometimes H), and they have a very strong preference for post-starburst galaxies. We are now running a survey called aSEATiDE, exclusively monitoring post-starburst galaxies to find more of these events and try and understand their properties.


Gravitational-Wave Follow-Up

I am the principal investigator of the gravitational-wave follow-up program at Las Cumbres Observatory (Arcavi et al. 2017b). We were one of six groups to independently image the first kilonova following a gravitational-wave signal, and we obtained the earliest and highest-cadence optical observations of it (Arcavi et al. 2017c). The kilonova was quite blue at early times indicating a relatively substantial lanthanide-free component of the ejecta.


Here's a list of all my publications.



SNEx

The Supernova Exchange (SNEx) is a web-based system to coordinate supernova observations among the large Supernova Key Project and Global Supernova Project collaborations, including triggering the telescopes, monitoring targets, sharing and viewing data, and more. Systems like SNEx will become very important for coordinating and sharing followup observations of transients found with LSST. SNEx is currently only available to members of Supernove Key Project and the Global Supernova Project. If you are a member of one of these collaborations, visit SNEx to request an account.

Astronomy on Tap

Astronomy on Tap (or AoT) is an outreach activity in which informal astronomy-related presentations are given at a bar. AoT exists nation-wide in the US and at some international locations. I am the organizer of AoT Santa Barbara, which happens about once a month at the M8RX bar downtown. Each event consists of two short astronomy presentations and a summary of astronomy news from the past month. Prizes are given away by raffle and to people who ask questions. All of our events are available to watch on YouTube. On March of 2017 we celebrated our one year anniversary and a story about us appeared on local NPR station KCLU.