Multiwavelength Characterization of a New Magnetic Cataclysmic Variable 2CXO J050740.7-091337
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| Format: | Preprint |
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2026
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| _version_ | 1866910192702062592 |
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| author | Galiullin, Ilkham Dodon, Vladislav Rodriguez, Antonio C. Szkody, Paula Sibgatullin, Askar |
| author_facet | Galiullin, Ilkham Dodon, Vladislav Rodriguez, Antonio C. Szkody, Paula Sibgatullin, Askar |
| contents | We report the discovery and characterization of a new cataclysmic variable (CV), 2CXO J050740.7-091337 (hereafter 2CXO J0507), identified using the X-ray main sequence through a cross-match between the Chandra Source Catalogue 2.1 and Gaia DR3. Optical spectroscopic follow-up with Keck I/LRIS reveals prominent cyclotron humps and Balmer emission lines, indicating a strongly magnetized white dwarf with a magnetic field strength of $B \approx 30$ MG. Analysis of Chandra and XMM-Newton archival data shows an X-ray luminosity of $L_X = (5.18 \pm 0.88) \times 10^{30}$ erg s$^{-1}$ (0.3-10 keV). The X-ray spectrum is well approximated by a thermal plasma emission model with a temperature of $kT = 7.95^{+3.84}_{-1.85}$ keV, showing no soft excess or intrinsic absorption. 2CXO J0507 exhibits long-term optical variability by $\approx2$ mag (ranging $\approx18-20$ mag) in Zwicky Transient Facility and Asteroid Terrestrial-impact Last Alert System photometric data. Both X-ray and optical modulation suggest an orbital period of 2.34 hr. These properties indicate that 2CXO J0507 is a magnetic CV, most closely resembling a polar. As 2CXO J0507 sits close to the faint limit of current optical time-domain surveys, it serves as a representative example of the large population of faint, magnetic CVs expected to be systematically identified by the Rubin Observatory. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2605_04179 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Multiwavelength Characterization of a New Magnetic Cataclysmic Variable 2CXO J050740.7-091337 Galiullin, Ilkham Dodon, Vladislav Rodriguez, Antonio C. Szkody, Paula Sibgatullin, Askar High Energy Astrophysical Phenomena Solar and Stellar Astrophysics We report the discovery and characterization of a new cataclysmic variable (CV), 2CXO J050740.7-091337 (hereafter 2CXO J0507), identified using the X-ray main sequence through a cross-match between the Chandra Source Catalogue 2.1 and Gaia DR3. Optical spectroscopic follow-up with Keck I/LRIS reveals prominent cyclotron humps and Balmer emission lines, indicating a strongly magnetized white dwarf with a magnetic field strength of $B \approx 30$ MG. Analysis of Chandra and XMM-Newton archival data shows an X-ray luminosity of $L_X = (5.18 \pm 0.88) \times 10^{30}$ erg s$^{-1}$ (0.3-10 keV). The X-ray spectrum is well approximated by a thermal plasma emission model with a temperature of $kT = 7.95^{+3.84}_{-1.85}$ keV, showing no soft excess or intrinsic absorption. 2CXO J0507 exhibits long-term optical variability by $\approx2$ mag (ranging $\approx18-20$ mag) in Zwicky Transient Facility and Asteroid Terrestrial-impact Last Alert System photometric data. Both X-ray and optical modulation suggest an orbital period of 2.34 hr. These properties indicate that 2CXO J0507 is a magnetic CV, most closely resembling a polar. As 2CXO J0507 sits close to the faint limit of current optical time-domain surveys, it serves as a representative example of the large population of faint, magnetic CVs expected to be systematically identified by the Rubin Observatory. |
| title | Multiwavelength Characterization of a New Magnetic Cataclysmic Variable 2CXO J050740.7-091337 |
| topic | High Energy Astrophysical Phenomena Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2605.04179 |