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CURRICULUM VITAE Benjamin John Shappee

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CURRICULUM VITAE Benjamin John Shappee Assistant Professor University of Hawaii [email protected] Institute for Astronomy http://www.ifa.hawaii.edu/users/shappee/ 2680 Woodlawn Drive Citizenship: United States of America Honolulu, HI 96822-1839 USA Research Interests Observational astrophysics with an emphasis on optical surveys, the transient universe, tidal disruption events, changing-look active galactic nuclei, and type Ia supernovae progenitors. Positions Held 2017 − : Assistant Professor University of Hawaii, Institute for Astronomy 2014 − 2017 : Hubble, Carnegie-Princeton Fellow, Carnegie Observatories 2013 − 2014 : OSU Presidential Fellow, Department of Astronomy, The Ohio State University 2013 : Research Associate, Department of Astronomy, The Ohio State University 2010 − 2013 : National Science Foundation Graduate Research Fellow, Department of Astronomy, The Ohio State University 2009 − 2010 : Teaching Associate, Department of Astronomy, The Ohio State University 2008 − 2009 : Research Assistant, Department of Physics and Astronomy, Rutgers University Advisor: Prof. Saurabh W. Jha 2006 − 2008 : Physics Demonstration Assistant, Department of Physics and Astronomy, Rutgers University Education June, 2014 : Ph.D., Astronomy, The Ohio State University, Columbus, Ohio Thesis: The Transient Universe Advisor: Professor Krzysztof Z. Stanek June, 2012 : M.S., Astronomy, The Ohio State University, Columbus, Ohio May, 2009 : B.A., Physics, Astronomy & Math, Rutgers University, New Brunswick, New Jersey Honors: Summa Cum Laude Honors & Awards 2014 : NASA Hubble Fellowship, Carnegie Observatories (National) 2014 : Carnegie-Princeton Fellowship, Carnegie Observatories (National) 2013 : Presidential Fellowship, The Ohio State University (University) 2013 : Allan Markowitz Award in Observational Astronomy, The Ohio State University (Departmental) 2010 : National Science Foundation’s Graduate Research Fellow, The Ohio State University (National) 2009 : Richard T. Weidner Prize, Rutgers University (Departmental) 2008 : Herman Y. Carr Scholarship, Rutgers University (Departmental) 2006 : New Jersey Blouse Distinguished Scholar Award (State) Selected External Research Support 2021: “A STIS view of ASASSN-14ko: uncovering the nature of the recently discovered periodic nuclear tran- sient STScI HST-GO-16498”, PI, Hubble Space Telescope Guest Observer Program, $38; 657 2021: “A STIS view of ASASSN-14ko: uncovering the nature of the recently discovered periodic nuclear tran- sient STScI HST-GO-16451”, PI, Hubble Space Telescope Guest Observer Program, $39; 398 2021: “An Extragalactic Old Faithful: Uncovering the Nature of the ASASSN-14ko’s Periodic Flares”, CoI; Finical PI, NICER Guest Observer Cycle 3, $37; 500 2021: “REU/RET Site: University of Hawai‘i Institute for Astronomy”, CoI, NSF 19-582 Research Experiences for Undergraduates (FAIN: #2050710), $620; 829 2021: “Increasing The Impact Of TESS With The All-Sky Automated Survey For Supernovae”, CoI, TESS GI Proposal Cycle 4 (G04174 ), $250; 000 2020: “Collaborative Research: Beyond Gaia: Expanding the Dynamical Map of the Milky Way with Astero- seismic Distances”, CoI, National Science Foundation Grant (AST #2009828), $295; 777 2020: “Early-Time UVOT and XRT Follow-up of Bright TDEs Detected by ASAS-SN”, CoI, Neil Gehrels Swift Observatory Guest Investigator (80NSSC21K0136), $39; 996 2019: “MRI: Development of a Robotic University of Hawaii 88” Telescope (Robo88)”, PI, National Science Foundation Grant (AST #1920392), $991; 297 2019: “WoU-MMA: Collaborative Research: All-Sky Automated Survey for Supernovae in the Era of Multi- Messenger Astrophysics”, PI, National Science Foundation Grant (AST #1908952), $341; 837 2019: “Hawaii Supernova Flows”, CoPI, National Science Foundation Grant (AST #1911074), $555; 978 2019: “Using TESS as a Transient Explorer Survey Satellite”, PI, TESS GI Proposal Cycle 2 (80NSSC19K1717), $200; 000 2019: “Rainbow Road: Mapping Multi-Wavelength AGN Variability in the Era of TESS”, PI, 2019 NASA Fellowship Activity (Fellow: Anna Payne; 80NSSC19K1679), $165; 000 2019: “Cometary Observation Metadata Archive (COMA), an Interactive Science Portal for Primitive Solar System Objects”, CoI, NASA - Planetary Data Archiving, Restoration, and Tools (80NSSC19K0413), $1; 069; 228 2017 : “Forming a More Perfect Union: Enhancing the Science of NASA’s Transiting Exoplanet Survey Satellite from the Ground”, PI, Mt. Cuba Astronomical Foundation, $77; 186 2016 : “Whimper of a Bang: Documenting the Final Days of the Nearby Type Ia Supernova 2011fe”, PI, HST Cycle 24 Guest Observer Program, $48; 802 2016 : “Going gently into the night: constraining Type Ia supernova nucleosynthesis using late-time photome- try”, CoI, HST Cycle 24 Guest Observer Program, $118; 309 2015 : “Whimper of a Bang: Documenting the Final Days of the Nearby Type Ia Supernova 2011fe”, PI, HST Cycle 23 Guest Observer Program, $38; 651 2015 : “All-Sky Automated Survey for Supernovae: Big Science with Small Telescopes”, Senior Personnel, National Science Foundation Grant (AST #1515927), $640; 000 2015 : “Swift Follow-Up of The Most Interesting ASAS-SN Transients”, CoI, Swift Cycle 11 Guest Investigator Program, $40; 500 2014 : “Whimper of a Bang: Documenting the Final Days of the Nearby Type Ia Supernova 2011fe”, PI, HST Cycle 22 Guest Observer Program, $46; 144 Professional Activities Aug 2021 : Science Organizing Committee, TESS Science Conference II Aug 2019 : Science Organizing Committee, TESS Science Conference I Aug. 2015 : Workshop Co-Host, Carnegie SN Ia Progenitor Workshop 2015 − : Referee, The Astronomical Journal 2015 − : Referee, Monthly Notices of the Royal Astronomical Society 2014 − : Referee, Publications of the Astronomical Society of the Pacific 2013 − : Referee, The Astrophysical Journal 2012 − : Member, American Astronomical Society Advising Experience Graduate: Michael Tucker (UH); Type Ia Supernovae 8/2017− Kyle Hart (UH); ASAS-SN Sky Patrol 6/2018− Anna Payne (UH); Changing-look AGN 8/2018− Aaron Do (UH); Hawaii SN Flows 8/2018− Jason Hinkle (UH); Tidal Disruption Events 8/2019− Dhvanil Desai (UH); Type II Supernovae 8/2021− Undergraduate: Current: Anna Gardner (UH); Infrared-excess White Dwarfs 3/2021− Helena Treiber (UH REU); AGN in T ESS 3/2021− Willem Hoogendam(UH REU); Interesting 91bg-like SNe Ia 3/2021− Jesse Zeldes (UH REU); ASAS-SN M-dwarfs in K2 and TESS 6/2020− Past: Liam Dubay (UH ! Ohio State); SNe Ia-CSMs in GALEX 6/2020−6/2021 John Bredall (UH ! Ohio State); Young Stellar Objects 9/2018−8/2020 Erica Sawczynec (UH ! UT Austin ); Changing-look AGN 8/2018−5/2019 Dominick Rowan (UH REU ! Ohio State); WDs in GALEX 6/2018−5/2019 Jacob E. Jencson (OSU ! CalTech ! UArizona); Supernovae 2/2012−6/2014 Teaching ASTR 790: Astro-ph Seminar – Joint taught Spring and Fall 2018-2021 ASTR 699: Professional Development – 1st-Year Grad Student; Joint taught Fall 2018-2021 ASTR 110: Survey of Astronomy – 2 sections – Spring 2020 ASTR 734: Order of Magnitude – Spring 2019 Refereed Publications Summary: 188 total refereed/submitted publications, 10 first author, 63 with significant contribution, 115 with contribution; ∼ 11; 500+ citations; ∼ 1; 650+ 1st-author citations; h ' 47; the 2 papers led by my postdocs are denote by *, 12 papers led by my grad students are denote by **, and the 4 by my undergrad students are denote by ***. Submitted: 15. ***Zeldes, Jesse, Hinkle, Jason T., Shappee, B. J. et al. 2021,“Flares Big and Small: a K2 and TESS View of ASAS-SN Superflares ” arXiv e-prints,arXiv:2109.04501˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210904501Z) 14. ***Dubay, Liam O., Tucker, M. A., Do, Aaron, Shappee, B. J. et al. 2021,“Late-Onset Circumstellar Medium Interactions are Rare: An Unbiased GALEX View of Type Ia Supernovae ” arXiv e-prints,arXiv:2104.02086˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210402086D) 13. **Payne, Anna V., Shappee, B. J. et al. 2021,“The Rapid X-ray and UV Evolution of ASASSN-14ko ” arXiv e-prints,arXiv:2104.06414˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210406414P) 12. **Do, Aaron, Shappee, B. J. et al. 2021,“Blast From the Past: Constraining Progenitor Models of SN 1972E ” arXiv e-prints,arXiv:2102.07796˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210207796D) 11. **Hinkle, Jason T., J. T., Holoien, T., Shappee, B. J., et al. 2021,“The Curious Case of ASASSN-20hx: A Slowly-Evolving, UV and X-ray Luminous, Ambiguous Nuclear Transient ” arXiv e-prints,arXiv:2108.03245˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210803245H) 10. *Ashall, C., et al. (incl. Shappee, B. J. ) 2021,“Carnegie Supernova Project: The First Homogeneous Sample of “Super-Chandrasekhar Mass”/2003fg-like Type Ia Supernova ” arXiv e-prints,arXiv:2106.12140˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210612140A) 9. *de Jaeger, T., Shappee, B. J. , et al. 2021,“ASAS-SN search for optical counterparts of gravitational- wave events from the third observing run of Advanced LIGO/Virgo ” arXiv e-prints,arXiv:2108.04839˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210804839D) 8. Hanus,ˇ J., Pejcha, O., Shappee, B. J. , et al. 2021,“V -band photometry of asteroids from ASAS-SN: Finding asteroids with slow spin ” arXiv e-prints,arXiv:2107.10027˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210710027H) 7. Lu, J., et al. (incl. Shappee, B. J. ) 2021,“ASASSN-15hy: an under-luminous, red 03fg-like type Ia supernova ” arXiv e-prints,arXiv:2107.08150˙ (https://ui.adsabs.harvard.edu/abs/2021arXiv210708150L) 6. Kawash, A., et al. (incl. Shappee, B. J. ) 2021,“Galactic Extinction: How Many Novae Does
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    The X-ray Universe 2017 6−9 June 2017 Centro Congressi Frentani Rome, Italy A conference organised by the European Space Agency XMM-Newton Science Operations Centre National Institute for Astrophysics, Italian Space Agency University Roma Tre, La Sapienza University ABSTRACT BOOK Oral Communications and Posters Edited by Simone Migliari, Jan-Uwe Ness Organising Committees Scientific Organising Committee M. Arnaud Commissariat ´al’´energie atomique Saclay, Gif sur Yvette, France D. Barret (chair) Institut de Recherche en Astrophysique et Plan´etologie, France G. Branduardi-Raymont Mullard Space Science Laboratory, Dorking, Surrey, United Kingdom L. Brenneman Smithsonian Astrophysical Observatory, Cambridge, USA M. Brusa Universit`adi Bologna, Italy M. Cappi Istituto Nazionale di Astrofisica, Bologna, Italy E. Churazov Max-Planck-Institut f¨urAstrophysik, Garching, Germany A. Decourchelle Commissariat ´al’´energie atomique Saclay, Gif sur Yvette, France N. Degenaar University of Amsterdam, the Netherlands A. Fabian University of Cambridge, United Kingdom F. Fiore Osservatorio Astronomico di Roma, Monteporzio Catone, Italy F. Harrison California Institute of Technology, Pasadena, USA M. Hernanz Institute of Space Sciences (CSIC-IEEC), Barcelona, Spain A. Hornschemeier Goddard Space Flight Center, Greenbelt, USA V. Karas Academy of Sciences, Prague, Czech Republic C. Kouveliotou George Washington University, Washington DC, USA G. Matt Universit`adegli Studi Roma Tre, Roma, Italy Y. Naz´e Universit´ede Li`ege, Belgium T. Ohashi Tokyo Metropolitan University, Japan I. Papadakis University of Crete, Heraklion, Greece J. Hjorth University of Copenhagen, Denmark K. Poppenhaeger Queen’s University Belfast, United Kingdom N. Rea Instituto de Ciencias del Espacio (CSIC-IEEC), Spain T. Reiprich Bonn University, Germany M. Salvato Max-Planck-Institut f¨urextraterrestrische Physik, Garching, Germany N.
  • Iptf14hls: a Unique Long-Lived Supernova from a Rare Ex- Plosion Channel

    Iptf14hls: a Unique Long-Lived Supernova from a Rare Ex- Plosion Channel

    iPTF14hls: A unique long-lived supernova from a rare ex- plosion channel I. Arcavi1;2, et al. 1Las Cumbres Observatory Global Telescope Network, Santa Barbara, CA 93117, USA. 2Kavli Institute for Theoretical Physics, University of California, Santa Barbara, CA 93106, USA. 1 Most hydrogen-rich massive stars end their lives in catastrophic explosions known as Type 2 IIP supernovae, which maintain a roughly constant luminosity for ≈100 days and then de- 3 cline. This behavior is well explained as emission from a shocked and expanding hydrogen- 56 4 rich red supergiant envelope, powered at late times by the decay of radioactive Ni produced 1, 2, 3 5 in the explosion . As the ejected mass expands and cools it becomes transparent from the 6 outside inwards, and decreasing expansion velocities are observed as the inner slower-moving 7 material is revealed. Here we present iPTF14hls, a nearby supernova with spectral features 8 identical to those of Type IIP events, but remaining luminous for over 600 days with at least 9 five distinct peaks in its light curve and expansion velocities that remain nearly constant in 10 time. Unlike other long-lived supernovae, iPTF14hls shows no signs of interaction with cir- 11 cumstellar material. Such behavior has never been seen before for any type of supernova 12 and it challenges all existing explosion models. Some of the properties of iPTF14hls can be 13 explained by the formation of a long-lived central power source such as the spindown of a 4, 5, 6 7, 8 14 highly magentized neutron star or fallback accretion onto a black hole .