Source: Astronomy Department Editor: Chen Xiaorong
Recently, the latest star catalogue obtained by the LAMOST-Kepler project, an international cooperation project of the Fu Jianning team of the Beijing Normal University, was officially published in the important astronomical journal Astrophysics.
The Kepler Space Telescope is a high-precision continuous photometric satellite launched by NASA in May 2009. It aims to detect terrestrial planets through the planetary transit method, and provides an unprecedented high-precision metering data for study of stellar physics. Using its four-year observations of the 105-square-degree zone between the premier observation zone, Cygnus and Lyra, world astronomers have made a number of important advances in the study of exoplanet science and stellar physics. Published more than 1,000 important scientific literature, including more than 20 articles in the journals Nature and Science. However, in-depth study of these data requires a combination of high-precision stellar atmospheric parameters, such as providing input parameters for the stellar seismic calculation model, optimizing the model search parameter space, and studying the orbital distribution of the exoplanets. Unfortunately, the use of ordinary telescopes for spectral observation of about 200,000 stars is time-consuming and labor-intensive, and the LAMOST telescope built and operated by China is an excellent choice for subsequent observations. With its large-caliber large-field multi-target characteristics, a single observation can acquire spectra of about 4,000 target sources.
The LAMOST-Kepler project was jointly initiated by scientists from Beijing Normal University and Belgium during the LAMOST pilot survey. The first round of surveys ended in 2014. Research on the acquisition of spectra based on this project has made a number of important advances, such as eccentricity studies of exoplanets and statistical analysis of solar stellar super flares. Since the first round of the star catalog was released in December 2015, more than 40 references (ADS) have been obtained in a single article. On this basis, the LAMOST Phase I survey, which lasted for five years, ended its observation in June 2017, during which two rounds of complete observations were made in the Kepler Sky Zone, which acquired approximately 230,000 high quality spectrum of more than 156,000 stars. The spectrum yielded 174,000 sets of parameters for up to 126,000 stars, some of which were observed multiple times. Among these target sources, LAMOST and Kepler have more than 76,000 common sources, accounting for about 40% of the total number of Kepler observations. These data will provide important support for the in-depth study of multi-target stars and exoplanets in the area, which has important scientific significance.
Observational area coverage map for the LAMOST-Kepler project
The first round of the 2015 star catalog released article：http://iopscience.iop.org/article/10.1088/0067-0049/220/1/19