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Cataclysmic Variable Candidates Identified in eROSITA-DE DR1,XMM-Newton, Swift, and ROSAT Catalogs

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arxiv 2504.10794 v3 pith:RAUPSEPX submitted 2025-04-15 astro-ph.IM astro-ph.HE

Cataclysmic Variable Candidates Identified in eROSITA-DE DR1,XMM-Newton, Swift, and ROSAT Catalogs

Xiangxiang Wang , Jumpei Takata This is my paper
classification astro-ph.IM astro-ph.HE
keywords candidatesx-rayerositasourcescataclysmiccatalogsdwarfemitting
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Cataclysmic variables (CVs) are binary systems with a white dwarf accreting matter from a low-mass star, making them significant sources of X-ray emission in the Galaxy. We present a systematic search for X-ray emitting CV candidates by cross-matching four X-ray catalogs (eROSITA, XMM-Newton, Swift, and ROSAT) with Gaia sources located in the bridge region between the main sequence and white dwarf cooling sequence in the Hertzsprung-Russell diagram. From 444 candidates (267 confirmed CVs and 177 new candidates), we detect orbital modulation in 56 sources using ZTF/TESS light curves. The eROSITA catalog contributes 51% of candidates, outperforming other surveys due to its wider sky coverage and higher sensitivity (~10^{-14} erg cm^{-2} s^{-1}). Our method demonstrates the efficiency of combining X-ray data with time-domain analysis for CV identification, with future eROSITA observations expected to expand the population of X-ray emitting CVs.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Cataclysmic Variables Photometric Periods from TESS

    astro-ph.SR 2026-07 accept novelty 6.5

    TESS data give photometric periods for 1362 cataclysmic variables (hundreds new), confirming the 2–3 h gap, a sample median of 3.68 h, and spin periods for 83 intermediate polars.

  2. Cataclysmic Variables Photometric Periods from TESS

    astro-ph.SR 2026-07 conditional novelty 6.0

    TESS photometry yields coherent periods for 1,362 CVs, including roughly 465–565 first determinations, and confirms the 2–3 h period gap with a median period near 3.68 h.

  3. Cataclysmic Variables Photometric Periods from TESS

    astro-ph.SR 2026-07 conditional novelty 5.0

    TESS photometry of 1,362 cataclysmic variables yields 565 new period measurements, confirms the 2–3 h period gap, and finds a median CV photometric period of 3.681 h.