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Four new eclipsing accreting ultracompact white dwarf binaries found with the Zwicky Transient Facility
J. M. Khalil, J. van Roestel, E. C. Bellm +10
Context. Accreting ultracompact binaries contain a white dwarf that is accreting from a degenerate object and have orbital periods shorter than 65 minutes. Aims. The aims of this l…
A Pilot Search for Gravitational Self-Lensing Binaries with the Zwicky Transient Facility
Allison Crossland, Eric C. Bellm, Courtney Klein +5
Binary systems containing a compact object may exhibit periodic brightening episodes due to gravitational lensing as the compact object transits the companion star. Such ``self-len…
A 12.4 day periodicity in a close binary system after a supernova
Ping Chen, Avishay Gal-Yam, Jesper Sollerman +37
Neutron stars and stellar-mass black holes are the remnants of massive star explosions. Most massive stars reside in close binary systems, and the interplay between the companion s…
VLASS tidal disruption events with optical flares I: the sample and a comparison to optically-selected TDEs
Jean J. Somalwar, Vikram Ravi, Dillon Z. Dong +11
In this work, we use the Jansky VLA Sky Survey (VLASS) to compile the first sample of six radio-selected tidal disruption events (TDEs) with transient optical counterparts. While w…
The first systematically identified repeating partial tidal disruption event
Jean J. Somalwar, Vikram Ravi, Yuhan Yao +13
Tidal disruption events (TDEs) occur when a star enters the tidal radius of a supermassive black hole (SMBH). If the star only grazes the tidal radius, a fraction of the stellar ma…
The Early Ultraviolet Light-Curves of Type II Supernovae and the Radii of Their Progenitor Stars
Ido Irani, Jonathan Morag, Avishay Gal-Yam +18
We present a sample of 34 normal SNe II detected with the Zwicky Transient Facility, with multi-band UV light-curves starting at days after explosion, as well as X-ray d…
An Optically-Discovered Outburst from XTE J1859+226
Eric C. Bellm, Yuankun Wang, Jan van Roestel +13
Using the Zwicky Transient Facility, in 2021 February we identified the first known outburst of the Black Hole X-ray Transient XTE J1859+226 since its discovery in 1999. The outbur…
Probing pre-supernova mass loss in double-peaked Type Ibc supernovae from the Zwicky Transient Facility
Kaustav K. Das, Mansi M. Kasliwal, Jesper Sollerman +34
Eruptive mass loss of massive stars prior to supernova (SN) explosion is key to understanding their evolution and end fate. An observational signature of pre-SN mass loss is the de…
Long-rising Type II Supernovae in the Zwicky Transient Facility Census of the Local Universe
Tawny Sit, Mansi M. Kasliwal, Anastasios Tzanidakis +25
SN 1987A was an unusual hydrogen-rich core-collapse supernova originating from a blue supergiant star. Similar blue supergiant explosions remain a small family of events, and are b…
A New Forced Photometry Service for the Zwicky Transient Facility
Frank J. Masci, Russ R. Laher, Benjamin Rusholme +6
We describe the Zwicky Transient Facility (ZTF) Forced Photometry Service (ZFPS) as developed and maintained by the ZTF Science Data System Team at IPAC/Caltech. The service is ope…
1100 days in the life of the supernova 2018ibb -- The best pair-instability supernova candidate, to date
Steve Schulze, Claes Fransson, Alexandra Kozyreva +63
Abridged - Stars with ZAMS masses between 140 and are thought to explode as pair-instability supernovae (PISNe). During their thermonuclear runaway, PISNe can produce…
SN 2020udy: a SN Iax with strict limits on interaction consistent with a helium-star companion
Kate Maguire, Mark R. Magee, Giorgos Leloudas +24
Early observations of transient explosions can provide vital clues to their progenitor origins. In this paper we present the nearby Type Iax (02cx-like) supernova (SN), SN 2020udy…
The broad-lined Type-Ic supernova SN 2022xxf with extraordinary two-humped light curves
H. Kuncarayakti, J. Sollerman, L. Izzo +60
We report on our study of supernova (SN) 2022xxf based on observations obtained during the first four months of its evolution. The light curves (LCs) display two humps of similar m…
Tidal Disruption Event Demographics with the Zwicky Transient Facility: Volumetric Rates, Luminosity Function, and Implications for the Local Black Hole Mass Function
Yuhan Yao, Vikram Ravi, Suvi Gezari +26
We conduct a systematic tidal disruption event (TDE) demographics analysis using the largest sample of optically selected TDEs. A flux-limited, spectroscopically complete sample of…
Growth-rate measurement with type-Ia supernovae using ZTF survey simulations
Bastien Carreres, Julian E. Bautista, Fabrice Feinstein +21
Measurements of the growth rate of structures at with peculiar velocity surveys have the potential of testing the validity of general relativity on cosmic scales. In this…
SN 2021zny: an early flux excess combined with late-time oxygen emission suggests a double white dwarf merger event
Georgios Dimitriadis, Kate Maguire, Viraj R. Karambelkar +28
We present a photometric and spectroscopic analysis of the ultra-luminous and slowly evolving 03fg-like Type Ia SN 2021zny. Our observational campaign starts from hours a…
Collapsars as Sites of r-process Nucleosynthesis: Systematic Near-Infrared Follow-up of Type Ic-BL Supernovae
Shreya Anand, Jennifer Barnes, Sheng Yang +41
One of the open questions following the discovery of GW170817 is whether neutron star mergers are the only astrophysical sites capable of producing -process elements. Simulation…
A Systematic Study of Ia-CSM Supernovae from the ZTF Bright Transient Survey
Yashvi Sharma, Jesper Sollerman, Christoffer Fremling +35
Among the supernovae (SNe) that show strong interaction with the circumstellar medium, there is a rare subclass of Type Ia supernovae, SNe Ia-CSM, that show strong narrow hydrogen…