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Mapping the Landscape of M Dwarf X-ray Flares: New Discoveries in Context
Imri A. Dickstein, Maayane T. Soumagnac, Eran O. Ofek +4
We report the discovery of 11 X-ray flares from 7 M dwarfs previously unknown to exhibit flaring activity, by cross-matching eROSITA observations of bright, nearby M dwarfs with th…
RINGO3 polarimetry of very young ZTF supernovae
J. R. Maund, Y. Yang, I. A. Steele +13
The early phases of the observed evolution of the supernovae (SNe) are expected to be dominated by the shock breakout and ``flash" ionization of the surrounding circumstellar mediu…
A WC/WO star exploding within an expanding carbon-oxygen-neon nebula
A. Gal-Yam, R. Bruch, S. Schulze +46
The final explosive fate of massive stars, and the nature of the compact remnants they leave behind (black holes and neutron stars), are major open questions in astrophysics. Many…
A highly magnetised and rapidly rotating white dwarf as small as the Moon
Ilaria Caiazzo, Kevin B. Burdge, James Fuller +15
White dwarfs represent the last stage of evolution of stars with mass less than about eight times that of the Sun and, like other stars, are often found in binaries. If the orbital…
An 8.8 minute orbital period eclipsing detached double white dwarf binary
Kevin B. Burdge, Michael W. Coughlin, Jim Fuller +13
We report the discovery of ZTF J2243+5242, an eclipsing double white dwarf binary with an orbital period of just minutes, the second known eclipsing binary with an orbital pe…
A systematic search of Zwicky Transient Facility data for ultracompact binary LISA-detectable gravitational-wave sources
Kevin B. Burdge, Thomas A. Prince, Jim Fuller +31
Using photometry collected with the Zwicky Transient Facility (ZTF), we are conducting an ongoing survey for binary systems with short orbital periods ( with…
A new class of Roche lobe-filling hot subdwarf binaries
Thomas Kupfer, Evan B. Bauer, Kevin B. Burdge +30
We present the discovery of the second binary with a Roche lobe-filling hot subdwarf transferring mass to a white dwarf (WD) companion. This 56 minute binary was discovered using d…
A catalog of over ten million variable source candidates in ZTF data release 1
Eran O. Ofek, Maayane Soumagnac, Guy Nir +4
Variable sources probe a wide range of astrophysical phenomena. We present a catalog of over ten million variable source candidates found in Data Release 1 (DR1) of the Zwicky Tran…
Cataclysmic Variables in the First Year of the Zwicky Transient Facility
Paula Szkody, Brooke Dicenzo, Anna Y. Q. Ho +25
Using selection criteria based on amplitude, time and color, we have identified 329 objects as known or candidate cataclysmic variable (CVs) during the first year of testing and op…
The first ultracompact Roche lobe-filling hot subdwarf binary
Thomas Kupfer, Evan B. Bauer, Thomas R. Marsh +29
We report the discovery of the first short period binary in which a hot subdwarf star (sdOB) fills its Roche lobe and started mass transfer to its companion. The object was discove…
Gravitational microlensing events from the first year of the northern Galactic plane survey by the Zwicky Transient Facility
P. Mroz, R. A. Street, E. Bachelet +12
The Zwicky Transient Facility (ZTF) is currently surveying the entire northern sky, including dense Galactic plane fields. Here, we present preliminary results of the search for gr…
General relativistic orbital decay in a seven-minute-orbital-period eclipsing binary system
Kevin B. Burdge, Michael W. Coughlin, Jim Fuller +23
General relativity predicts that short orbital period binaries emit significant gravitational radiation, and the upcoming Laser Interferometer Space Antenna (LISA) is expected to d…
Discovery of an intermediate-luminosity red transient in M51 and its likely dust-obscured, infrared-variable progenitor
Jacob E. Jencson, Scott M. Adams, Howard E. Bond +49
We present the discovery of an optical transient (OT) in Messier 51, designated M51 OT2019-1 (also ZTF19aadyppr, AT 2019abn, ATLAS19bzl), by the Zwicky Transient Facility (ZTF). Th…