AI 中文总结
利用MeerKAT的SDP UHF波段图像及相关技术，在LADUMA区域发现射电瞬变源MKT J032848.4-271904.6，它与M矮星LP 888-63相关，该矮星有活跃耀发行为，此发现凸显了相关设施对恒星瞬变的探测和描述能力。
AI 中文摘要
我们报告了MKT J032848.4-271904.6的发现与特征，它是利用SARAO科学数据处理器（SDP）的UHF波段图像，从约一年的MeerKAT观测中在LADUMA区域识别出的新射电瞬变源。通过瞬变管道（TraP）和先进滤波技术，识别出多个候选可变射电源，除一个外其他与星际闪烁一致，MKT J032848.4-271904.6是唯一显示固有变化的源。它在0.816 GHz有固有变化，41个时期有13次射电探测，峰值通量密度为1.041±0.043 mJy。其发射与低质量M矮星LP 888-63相关，LP 888-63在电磁频谱上有活跃耀发行为，TESS测光显示周期调制，ESO光谱揭示Halpha发射。这些发现凸显了MeerKAT的SDP成像及MeerLICHT等设施对恒星瞬变实时探测和特征描述的能力。
英文摘要
We report the discovery and characterisation of MKT J032848.4-271904.6, a new radio transient identified in the LADUMA field using SARAO Science Data Processor (SDP) UHF-band images from approximately one year of MeerKAT observations. Using the Transient Pipeline (TraP) and advanced filtering techniques, we identified a number of candidate variable radio sources in the field. All but one show variability consistent with refractive interstellar scintillation, leaving MKT J032848.4-271904.6 as the sole source exhibiting intrinsic variability. In addition, MKT J032848.4-271904.6 shows intrinsic variability at 0.816 GHz, with 13 radio detections across 41 epochs and a peak flux density of 1.041+/-0.043 mJy. We associate this emission with a low-mass M-dwarf star LP 888-63, located 23 pc from the Sun and identified as a companion to the white dwarf binary system LAWD 14 / WD 0326-273. LP 888-63 displays active flaring behaviour across the electromagnetic spectrum, including multi-band optical data from MeerLICHT. TESS photometry reveals a periodic modulation in the blended light curve of 5.780+/-0.507 days, consistent with rotational variability of a mid-M dwarf. Archival ESO spectra reveal Halpha emission, confirming magnetic activity. These findings highlight the capability of MeerKAT's SDP imaging and facilities like MeerLICHT for real-time detection and characterisation of stellar transients.
CommentsAccepted for publication in MNRAS
