Results 21 to 30 of about 48 (48)
Resolving the Periods of the Asynchronous Polar 1RXS J083842.1–282723
The Astrophysical Journal1RXS J083842.1−282723 is a nearly synchronous magnetic cataclysmic variable with a simple X-ray light curve. While its orbital period was fairly well established at P _orb = 98.4 minutes from optical spectroscopy, indirect estimates of P _spin / P _orb ...
J. P. Halpern
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Spectroscopic Follow-up on Potential Magnetic Cataclysmic Variables
The Astronomical JournalSpectroscopic observations of nine cataclysmic variables that have been postulated to contain magnetic white dwarfs were obtained to further characterize their classifications, orbital parameters, inclinations, and/or accretion properties.
Paula Szkody +10 more
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The AM Her System RX J1844.2+4454/2MASS J18441496+4454091/ZTF18aapobha
The Astrophysical JournalBased on ROSAT All-Sky Survey data and optical follow-up observations, we report observations of the cataclysmic variable RX J1844.2+4454/2MASS J18441496+4454091/ZTF18aapobha.
J. Greiner +3 more
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TESS Observations of Outbursts on Polars—Superflares
The Astrophysical JournalFlare events are magnetic activities on the stellar surface, which can provide us with information about the accretion behavior and evolution of polars. In this paper, we search for flare events on polars from all the available 2 minute cadence TESS data
Qishan Wang +2 more
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X-Ray and Infrared Analysis on a Faint Polar RX J1745.5-2905
The Astrophysical JournalRX J1745.5-2905 is a faint and distant polar below the period gap. It was observed intensively in X-ray by Chandra, and its X-ray data reveal frequent brightness transitions between low and high states like we found in the prototype star AM Her.
Qishan Wang +2 more
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The Astrophysical JournalTransiting Exoplanet Survey Satellite (TESS) photometry of the polars AM Herculis (AM Her) and AR Ursae Majoris (AR UMa) is presented, along with high-speed photometry. AM Her shows a variety of high states with frequent transitions between them.
Paul A. Mason +13 more
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Spectroscopic Identification and Population Properties of Cataclysmic Variables from DESI DR1
The Astrophysical Journal Supplement SeriesWe present a systematic search for cataclysmic variables (CVs) using spectroscopic data from Data Release 1 of the Dark Energy Spectroscopic Instrument. Applying the Bagging-TopPush algorithm, we identified 433 CV candidates and related objects, of which
Wen Hou +5 more
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NuSTAR Broadband X-Ray Observation of EF Eri Following its Reawakening into a High Accretion State
The Astrophysical JournalWe present the first NuSTAR X-ray observation of EF Eri, a well-known polar system. The NuSTAR observation was conducted in conjunction with NICER shortly after EF Eri entered a high accretion state following an unprecedented period of low activity ...
Luke W. Filor +9 more
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A Broadband Search for Coherent Radio Emission in Cataclysmic Variables
The Astrophysical JournalRadio observations of cataclysmic variables have revealed a variety of behaviors. From some systems, we see bright unpolarized radio flares occurring during dwarf nova outbursts, consistent with synchrotron emission from jets.
Margaret E. Ridder +3 more
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An Eccentric Planet Orbiting the Polar V808 Aurigae
The Astrophysical JournalWe analyze 15 yr of eclipse timings of the polar V808 Aur. The rapid ingress/egress of the white dwarf and bright accretion region provide timings as precise as a few tenths of a second for rapid cadence photometric data.
McKenna Leichty +6 more
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