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September 10, 2025Astronomy and Astrophysics

Einstein Probe discovery of the short-period intermediate polar EP J115415.8-501810

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YXYihong XiaoPutian University MGMingyu GeYunnan University NRN. ReaInstitut d'Estudis Espacials de Catalunya

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Overview

Observational analysis reveals periodic variations in X-ray emission from a newly identified intermediate polar, suggesting complex accretion dynamics.

Key Points

Periodic variations of 231 s were identified in the X-ray emission of EP J115415.8-501810, indicating active accretion processes.
Optical observations confirmed it as a cataclysmic variable, with a white dwarf on a ∼3.76 hr orbit, illuminating its binary nature.
Luminosity in the 0.3-10 keV range was estimated at ∼2 erg/s, associated with significant absorption characteristics.
Follow-up studies sought potential radio signals, noting upper limits that hint at the unique transient behavior for intermediate polars.

Cite This Study

Xiao et al. (2025) studied this question.

synapsesocial.com/papers/68c1b5fe54b1d3bfb60ea8da https://doi.org/10.1051/0004-6361/202554876

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September 10, 2025Astronomy and Astrophysics

Einstein Probe discovery of the short-period intermediate polar EP J115415.8-501810

View Full Paper

Ask AI

Bookmark

Authors

YXYihong XiaoPutian University MGMingyu GeYunnan University NRN. ReaInstitut d'Estudis Espacials de Catalunya

Discussion

Member takes

Overview

Observational analysis reveals periodic variations in X-ray emission from a newly identified intermediate polar, suggesting complex accretion dynamics.

Key Points

Periodic variations of 231 s were identified in the X-ray emission of EP J115415.8-501810, indicating active accretion processes.
Optical observations confirmed it as a cataclysmic variable, with a white dwarf on a ∼3.76 hr orbit, illuminating its binary nature.
Luminosity in the 0.3-10 keV range was estimated at ∼2 erg/s, associated with significant absorption characteristics.
Follow-up studies sought potential radio signals, noting upper limits that hint at the unique transient behavior for intermediate polars.

Cite This Study

Xiao et al. (2025) studied this question.

synapsesocial.com/papers/68c1b5fe54b1d3bfb60ea8da https://doi.org/10.1051/0004-6361/202554876

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