Wolf1130 is a triple system containing an ultramassive white dwarf (Wolf 1130B), an Msubdwarf (Wolf 1130A) and a T8 subdwarf (Wolf 1130C). We set out to determine a precise mass for Wolf1130B by phase-folding TESS photometry to the previously reported orbital period. Each orbit was fit for ellipsoidal, Doppler beaming, and thermal photometric variability. We found that the measured beaming amplitude of Wolf 1130AB is nearly triple the theoretical expectation, which we assign to the short-wavelength filter cutoff of TESS and features in the Msubdwarf spectrum. The photometric amplitudes suggest inflation of Wolf1130A by as much as 20%, possibly due to its rapid rotation under tidal locking. TESS photometry can be used to obtain masses for short-period binary systems, but photometric precision limits the utility in the case of Wolf1130AB.

Wolf1130是一个三重系统，包含超大质量白矮星（Wolf 1130B），Msubdwarf（Wolf 1130A）和T8亚矮星（Wolf 1130C）。我们着手通过将TESS光度相折叠到先前报道的轨道周期来确定Wolf1130B的精确质量。每个轨道都适合椭圆形，多普勒波束和热光度学可变性。我们发现，测得的Wolf 1130AB的波束振幅几乎是理论预期值的三倍，我们将其分配给TESS的短波长滤波器截止和Msubdwarf谱中的特征。光度振幅表明Wolf1130A的膨胀高达20％，这可能是由于其在潮汐锁定下快速旋转所致。TESS测光法可用于获取短周期二元系统的质量，但是在Wolf1130AB的情况下，测光法的精度会限制实用性。