Z
Zhuyun Zhuang
Researcher at California Institute of Technology
Publications - 11
Citations - 239
Zhuyun Zhuang is an academic researcher from California Institute of Technology. The author has contributed to research in topics: Galaxy & Supernova. The author has an hindex of 5, co-authored 8 publications receiving 114 citations.
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The Zwicky Transient Facility Bright Transient Survey I: Spectroscopic Classification and the Redshift Completeness of Local Galaxy Catalogs
Christoffer Fremling,Adam A. Miller,Y. Sharma,Alison Dugas,Daniel A. Perley,Kirsty Taggart,Jesper Sollerman,Ariel Goobar,Melissa L. Graham,James D. Neill,Jakob Nordin,M. Rigault,Robert J. Walters,Igor Andreoni,Ashot Bagdasaryan,Justin Belicki,Chris Cannella,Eric C. Bellm,S. B. Cenko,Kaushik De,Richard Dekany,Sara Frederick,V. Z. Golkhou,Matthew J. Graham,George Helou,Anna Ho,Mansi M. Kasliwal,Thomas Kupfer,R. R. Laher,Ashish Mahabal,Frank J. Masci,Reed Riddle,Ben Rusholme,Steve Schulze,David L. Shupe,Roger Smith,S. van Velzen,S. van Velzen,Lin Yan,Yunxi Yao,Zhuyun Zhuang,Shrinivas R. Kulkarni +41 more
TL;DR: In this article, the authors performed an analysis of the redshift completeness of local galaxy catalogs, dubbed as the Redshift Completeness Fraction (RCF; the number of SN host galaxies with known spectroscopic redshift prior to SN discovery divided by the total number of SNe hosts).
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The Zwicky Transient Facility Bright Transient Survey I: Spectroscopic Classification and the Redshift Completeness of Local Galaxy Catalogs
U. C. Fremling,Adam A. Miller,Y. Sharma,A. Dugas,Daniel A. Perley,Kirsty Taggart,Jesper Sollerman,Ariel Goobar,Melissa L. Graham,James D. Neill,J. Nordin,M. Rigault,Robert J. Walters,Igor Andreoni,Ashot Bagdasaryan,Justin Belicki,Chris Cannella,Eric C. Bellm,S. B. Cenko,Kaushik De,Richard G. Dekany,S. Frederick,V. Zach Golkhou,Matthew J. Graham,George Helou,Anna Ho,M. M. Kasliwal,Thomas Kupfer,Russ R. Laher,Ashish Mahabal,Frank J. Masci,Reed Riddle,Ben Rusholme,Steve Schulze,David L. Shupe,Roger Smith,Lin Yan,Yunxi Yao,Zhuyun Zhuang,Shrinivas R. Kulkarni +39 more
Abstract: The Zwicky Transient Facility (ZTF) is performing a three-day cadence survey of the visible Northern sky (~3$\pi$). The transient candidates found in this survey are announced via public alerts. As a supplementary product ZTF is also conducting a large spectroscopic campaign: the ZTF Bright Transient Survey (BTS). The goal of the BTS is to spectroscopically classify all extragalactic transients brighter than 18.5 mag at peak brightness and immediately announce those classifications to the public. Extragalactic discoveries from ZTF are predominantly Supernovae (SNe). The BTS is the largest flux-limited SN survey to date. Here we present a catalog of the761 SNe that were classified during the first nine months of the survey (2018 Apr. 1 to 2018 Dec. 31). The BTS SN catalog contains redshifts based on SN template matching and spectroscopic host galaxy redshifts when available. Based on this data we perform an analysis of the redshift completeness of local galaxy catalogs, dubbed as the Redshift Completeness Fraction (RCF; the number of SN host galaxies with known spectroscopic redshift prior to SN discovery divided by the total number of SN hosts). In total, we identify the host galaxies of 512 Type Ia supernovae, 227 of which have known spectroscopic redshifts, yielding an RCF estimate of $44\% \pm1\%$. We find a steady decrease in the RCF with increasing distance in the local universe. For z<0.05, or ~200 Mpc, we find RCF=0.6, which has important ramifications when searching for multimessenger astronomical events. Prospects for dramatically increasing the RCF are limited to new multi-fiber spectroscopic instruments, or wide-field narrowband surveys. We find that existing galaxy redshift catalogs are only $50\%$ complete at $r\approx16.9$ mag. Pushing this limit several magnitudes deeper will pay huge dividends when searching for electromagnetic counterparts to gravitational wave events.
Journal ArticleDOI
Bright, months-long stellar outbursts announce the explosion of interaction-powered supernovae
Nora L. Strotjohann,Eran O. Ofek,Avishay Gal-Yam,Rachel Bruch,Steve Schulze,Nir J. Shaviv,Jesper Sollerman,Alexei V. Filippenko,Ofer Yaron,Christoffer Fremling,Jakob Nordin,Erik C. Kool,Daniel A. Perley,Anna Y. Q. Ho,Yang Yang,Yuhan Yao,Maayane T. Soumagnac,Melissa L. Graham,Cristina Barbarino,Leonardo Tartaglia,Kaushik De,Daniel A. Goldstein,David O. Cook,Thomas G. Brink,Kirsty Taggart,Lin Yan,Ragnhild Lunnan,Mansi M. Kasliwal,Shri Kulkarni,Peter Nugent,Frank J. Masci,Philippe Rosnet,Scott M. Adams,Igor Andreoni,Ashot Bagdasaryan,Eric C. Bellm,Kevin B. Burdge,Dmitry A. Duev,Alison Dugas,Sara Frederick,Samantha Goldwasser,Matthew J. Hankins,I. Irani,Viraj Karambelkar,Thomas Kupfer,Jingyi Liang,James D. Neill,Michael Porter,Reed Riddle,Yashvi Sharma,Phil Short,Francesco Taddia,Anastasios Tzanidakis,Jan van Roestel,Richard Walters,Zhuyun Zhuang +55 more
TL;DR: In this paper, the authors used forced-photometry light curves for 196 interacting supernovae (SNe), mostly of Type IIn, detected by the Zwicky Transient Facility between early 2018 and June 2020, to identify and characterize pre-explosion outbursts.
Journal ArticleDOI
A Systematic Search of Zwicky Transient Facility Data for Ultracompact Binary LISA-detectable Gravitational-wave Sources
Kevin B. Burdge,Thomas A. Prince,Jim Fuller,David L. Kaplan,Tom Marsh,Pier-Emmanuel Tremblay,Zhuyun Zhuang,Eric C. Bellm,Ilaria Caiazzo,Michael W. Coughlin,V. S. Dhillon,Boris Gaensicke,Pablo Rodríguez-Gil,Matthew J. Graham,J. J. Hermes,Thomas Kupfer,S. P. Littlefair,Przemek Mróz,E. S. Phinney,Jan van Roestel,Yuhan Yao,Richard Dekany,Andrew J. Drake,Dmitry A. Duev,David Hale,Michael Feeney,George Helou,Stephen Kaye,Ashish Mahabal,Frank J. Masci,Reed Riddle,Roger Smith,Maayane T. Soumagnac,Maayane T. Soumagnac,Shrinivas R. Kulkarni +34 more
TL;DR: In this article, a survey of binary systems with short orbital periods (P_b < 1 hr) with the goal of identifying new gravitational-wave sources detectable by the upcoming Laser Interferometer Space Antenna (LISA) is presented.
Journal ArticleDOI
A systematic search of Zwicky Transient Facility data for ultracompact binary LISA-detectable gravitational-wave sources.
Kevin B. Burdge,Thomas A. Prince,Jim Fuller,David L. Kaplan,Tom Marsh,Pier-Emmanuel Tremblay,Zhuyun Zhuang,Eric C. Bellm,Ilaria Caiazzo,Michael W. Coughlin,V. S. Dhillon,Boris Gaensicke,Pablo Rodríguez-Gil,Matthew J. Graham,J. J. Hermes,Thomas Kupfer,S. P. Littlefair,Przemek Mróz,E. S. Phinney,Jan van Roestel,Yuhan Yao,Richard Dekany,Andrew J. Drake,Dmitry A. Duev,David Hale,Michael Feeney,George Helou,Stephen Kaye,Ashish Mahabal,Frank J. Masci,Reed Riddle,Roger Smith,Maayane T. Soumagnac,Maayane T. Soumagnac,Shrinivas R. Kulkarni +34 more
TL;DR: In this article, a survey of binary systems with short orbital periods was conducted with the goal of identifying new gravitational-wave sources detectable by the upcoming Laser Interferometer Space Antenna (LISA).