矮新星是一类频繁爆发的吸积性双星系统，由弱磁场的白矮星和充满洛希瓣的晚型主序星组成。矮新星普遍被认为不会产生射电辐射，常被作为吸积性天体系统不存在喷流的重要限制条件之一。近年来，矮新星的射电观测对上述模型提出了巨大的挑战，陆续发现并确认了6颗矮新星型射电发射源。本项目拟通过光学和射电联合观测，构建一个更完备的矮新星型射电发射源样本，进而探讨它们的物理性质。具体内容包括：（1）对已确认的矮新星型射电发射源进行光学监测，研究其射电爆发前的典型光学特征；（2）利用云南天文台光学望远镜对矮新星长期监测，搜寻具有上述典型光学特征的矮新星型射电发射源候选体，并对处于爆发态的矮新星型射电发射源候选体进行射电观测，构建更完备的矮新星型射电发射源样本；（3）通过数理统计和理论分析，探讨矮新星型射电发射源的物理本质。本项目的顺利开展，将对全面认识矮新星，约束吸积天体系统吸积-喷流模型具有重要意义。

Dwarf novae (DNe) are binary systems containing a non-magnetic white dwarf actively accreting from a Roche lobe-filling main sequence companion via an accretion disc. One of the main questions in dwarf novae research is what role mass ejections (jets of winds) play during dwarf novae outbursts. Almost all of other accretion systems have been found launching a jet ( e.g., AGNs, BHXRBs and young star objects, etc.). However, it was usually accepted dwarf novae do not launch jets which often was used to constrained jet-launching mode until recently 6 dwarf novae-type radio emitters were proved. Through combining optical and radio observations, this project is going to search dwarf novae-type radio emitters and construct a more full dwarf novae-type radio emitter sample. Furthermore, we will research the physical properties of dwarf novae-type radio emitters. The concrete contents include: (1) Through optical monitoring on the proved dwarf novae-type radio emitters, we will research their typical optical properties before radio outbursts. (2) Constructing a dwarf novae-type radio emitter sample through long optical observations using 1.0m, 60cm, 2.4m and China -Thailand 70cm optical telescopes in YNAO and presenting radio observations using FAST when the radio emitters will be predicted during outburst; (3) Studying the physical properties of dwarf novae-type radio emitters through statistical analysis on the our dwarf novae-type radio emitter sample and constraining the accretion-jet physics with accretion disc and jet theoretical analysis. The implement of the project can help us to fully recognize the physical properties of dwarf novae. Furthermore, the results will have certain enlightenment function, when we using the knowledge to constrain the accretion and jet mode for other accretion systems.