Four new eclipsing accreting ultracompact white dwarf binaries found with the Zwicky Transient Facility

被引:1
|
作者
Khalil, J. M. [1 ]
van Roestel, J. [1 ]
Bellm, E. C. [2 ]
Bloom, J. S. [3 ,4 ]
Dekany, R. [5 ]
Drake, A. J. [6 ]
Graham, M. J. [6 ]
Groom, S. L. [7 ]
Kulkarni, S. R. [6 ]
Laher, R. R. [7 ]
Mahabal, A. A. [6 ]
Prince, T. [6 ]
Riddle, R. [5 ]
机构
[1] Univ Amsterdam, Anton Pannekoek Inst Astron, NL-1090 GE Amsterdam, Netherlands
[2] Univ Washington, DIRAC Inst, Dept Astron, 3910 15th Ave NE, Seattle, WA 98195 USA
[3] Univ Calif Berkeley, Dept Astrophys, Berkeley, CA 94720 USA
[4] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd MS 50B-4206, Berkeley, CA 94720 USA
[5] CALTECH, Caltech Opt Observ, Pasadena, CA 91125 USA
[6] CALTECH, Div Phys Math & Astron, Pasadena, CA 91125 USA
[7] CALTECH, IPAC, 1200 E Calif Blvd, Pasadena, CA 91125 USA
基金
美国国家科学基金会; 荷兰研究理事会;
关键词
binaries : close; binaries: eclipsing; stars: dwarf novae; white dwarfs; CATACLYSMIC VARIABLES; SEARCH; STARS;
D O I
10.1051/0004-6361/202349010
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Context. Accreting ultracompact white dwarf binaries contain a white dwarf that is accreting from a degenerate object. They have orbital periods shorter than 65 min. Aims. We report the discovery and the orbital period of four new eclipsing accreting ultracompact white dwarf binaries found using the Zwicky Transient Facility (ZTF) and discuss their photometric properties. Methods. We searched through a list of 4171 dwarf novae compiled using the ZTF and used the box least square method to search for periodic signals in the data. Results. We found four eclipsing accreting ultracompact binaries with orbital periods between 25.9 and 56 min. One had previously been published as an AM Canum Venaticorum (AM CVn), and the other three systems are new discoveries. The two shorter-period systems are likely also AM CVn systems, while the longest-period system, with a period of 56 min, showed multiple super-outbursts over two years, which is more consistent with it being a helium CV.
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页数:6
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