论文标题
GAIA22AYJ：从深度黯然失色的9.36分钟二进制中爆发？
Gaia22ayj: outburst from a deeply eclipsing 9.36-min binary?
论文作者
论文摘要
Gaia卫星和Zwicky Transient设施（ZTF）在2022年3月3日被检测到GAIA22AYJ（= ZTF19AAGMVUK）。我分析了过去的公共ZTF数据，发现Gaia22ayj显示出连贯的大振幅双波变化，周期为0.00649910257（13）d = 9.36分钟。该周期可以是从白色矮人的自旋时期或二进制的轨道周期。我认为后一种可能性更有可能基于光曲线，类似于黯淡的二进制和轮廓的稳定性。爆发的存在至少约1 d表明该系统具有积聚磁盘。如果Gaia22Ayj确实是一个黯然失色的二进制，则为9.36分钟，这是有史以来最短的轨道时期，它在剥落积聚二进制文件时是最短的，并且是具有矮nova型爆发的系统的最短记录。对于具有此轨道时期的AM CVN系统，爆发的存在是不寻常的，并且该对象可能处于质量转移的转阶段。如果确认GAIA22AYJ的超短轨道时期，该对象将是在几年内检测周期变化以确认其进化状态并确定未来进化后果的理想目标。
Gaia22ayj (=ZTF19aagmvuk) was detected as a transient on 2022 March 3 both by the Gaia satellite and the Zwicky Transient Facility (ZTF). I analyzed the past public ZTF data and found that Gaia22ayj showed coherent large-amplitude double-wave variations with a period of 0.00649910257(13) d = 9.36 min. The period can be either from the spin period of the white dwarf or the orbital period of the binary. I consider the latter possibility more likely based on the light curve resembling an eclipsing binary and on the stability of the profile. The presence of an outburst lasting at least ~1 d suggests that this system has an accretion disk. If Gaia22ayj is indeed an eclipsing binary with a period of 9.36 min, this is the shortest orbital period ever measured in eclipsing accreting binaries and is the shortest record of a system with a dwarf nova-type outburst. The presence of an outburst is unusual for an AM CVn system with this orbital period and this object might be in the turn-on phase of the mass-transfer. If the ultrashort orbital period of Gaia22ayj is confirmed, this object would an ideal target to detect period variations within several years to confirm its evolutionary state and to identify the future evolutionary consequence.
