对蝎虎座β星12的星震研究：多点光谱观测，模式识别和地震模拟
An asteroseismic study of the beta Cephei star 12 Lacertae: multisite spectroscopic observations, mode identification and seismic modelling
摘要：
我们提出的结果，光谱多站点运动的β仙王座星12（DD）蝎虎。我们的研究是基于在11个月的时间跨度内用8台不同的望远镜收集的上千个高分辨率高S/N光谱。此外，我们利用许多档案光谱测量。我们确认了最近从测光中发现的10个独立频率，以及谐波和组合频率。特别地，在我们的光谱中检测到之前报道的频率为0.3428 1/d的类SPB g模。对于f1 = 5.178964 1/d，f2 = 5.334224 1/d，f3 = 5.066316 1/d和f4 = 5.490133 1/d，我们确定了四个主要模式：（l1，m1）=（1，1），（l2，m2）=（0，0），（l3，m3）=（1，0）和（l4，m4）=（2，1）。分别我们的地震模拟表明，f2可能是径向第一泛音和核心超调参数α_ov低于0.4的本地压力标度高度。
英文摘要：
We present the results of a spectroscopic multisite campaign for the beta Cephei star 12 (DD) Lacertae. Our study is based on more than thousand high-resolution high S/N spectra gathered with 8 different telescopes in a time span of 11 months. In addition we make use of numerous archival spectroscopic measurements. We confirm 10 independent frequencies recently discovered from photometry, as well as harmonics and combination frequencies. In particular, the SPB-like g-mode with frequency 0.3428 1/d reported before is detected in our spectroscopy. We identify the four main modes as (l1,m1) = (1, 1), (l2,m2) = (0, 0), (l3,m3) = (1, 0) and (l4,m4) = (2, 1) for f1 = 5.178964 1/d, f2 = 5.334224 1/d, f3 = 5.066316 1/d and f4 = 5.490133 1/d, respectively. Our seismic modelling shows that f2 is likely the radial first overtone and that the core overshooting parameter alpha_ov is lower than 0.4 local pressure scale heights.
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