论文标题
恒星口罩和双型星形在GAPS程序中观察到的M型星的形状，harps-n在TNG处观察到
Stellar masks and bisector's shape for M-type stars observed in the GAPS Programme with HARPS-N at TNG
论文作者
论文摘要
HARPS/HARPS-N数据还原软件（DRS）依赖于观察到的光谱和合适的恒星掩模之间的互相关来计算互相关函数（CCF），用于径向速度（RV）计算，以及作为恒星线条的指示器，例如通过Stellar Action引起的恒星线条。不幸的是，HARPS/HARPS-N DRS目前用于M型恒星的M2面膜导致CCF造成严重扭曲的CCF。我们创建了几个新的恒星口罩，以减少RVS中的错误并提高活动指标的可靠性作为双压器的跨度。我们获得了从Vald3数据库为早期M型星提供的理论行列表中创建的出色掩码（T $ _ {\ Mathrm {eff}} $ = 3500〜K和$ \ log {g} = 4.5 $）。 CCF的形状和相对活性指标得到了改善，RV时间序列使我们能够恢复已知的系列外球星，并具有与HARPS-TERRA获得的结果兼容的周期和振幅。
The HARPS/HARPS-N Data Reduction Software (DRS) relies on the cross-correlation between the observed spectra and a suitable stellar mask to compute a cross-correlation function (CCF) to be used both for the radial velocity (RV) computation and as an indicator of stellar lines asymmetry, induced for example by the stellar activity. Unfortunately the M2 mask currently used by the HARPS/HARPS-N DRS for M-type stars results in heavily distorted CCFs. We created several new stellar masks in order to decrease the errors in the RVs and to improve the reliability of the activity indicators as the bisector's span. We obtained very good results with a stellar mask created from the theoretical line list provided by the VALD3 database for an early M-type star (T$_{\mathrm{eff}}$=3500~K and $\log{g}=4.5$). The CCF's shape and relative activity indicators improved and the RV time-series allowed us to recover known exoplanets with periods and amplitudes compatible with the results obtained with HARPS-TERRA.
