Solar-like pulsating stars as distance indicators: G-K giants in the CoRoT and Kepler fields

Asteroseismology of red-clump stars with CoRoT and Kepler

The availability of asteroseismic constraints for a large number of red giants with CoRoT and in the near future with Kepler, paves the way for detailed studies of populations of galactic-disk red giants. We investigate which information on the observed population can be recovered by the distribution of the observed seismic constraints: the frequency of maximum power of solar-like oscillations ($ν_{max}$) and the large frequency separation ($Δν$). We use the distribution of $ν_{max}$ and of $Δν$ observed by CoRoT in nearly 800 red giants in the first long observational run, as a tool to invest…

A large sample of calibration stars for Gaia: log g from Kepler and CoRoT

Asteroseismic data can be used to determine surface gravities with precisions of < 0.05 dex by using the global seismic quantities Deltanu and nu_max along with Teff and [Fe/H]. Surface gravity is also one of the four stellar properties to be derived by automatic analyses for 1 billion stars from Gaia data (workpackage GSP_Phot). We explore seismic data from MS F, G, K stars (solar-like stars) observed by Kepler as a potential calibration source for methods that Gaia will use for object characterisation (log g). We calculate log g for bright nearby stars for which radii and masses are known, a…

Differential population studies using asteroseismology: solar-like oscillating giants in CoRoT fields LRc01 and LRa01

Solar-like oscillating giants observed by the space-borne satellites CoRoT and Kepler can be used as key tracers of stellar populations in the Milky Way. When combined with additional photometric/spectroscopic constraints, the pulsation spectra of solar-like oscillating giant stars not only reveal their radii, and hence distances, but also provide well-constrained estimates of their masses, which can be used as proxies for the ages of these evolved stars. In this contribution we provide supplementary material to the comparison we presented in Miglio et al. (2013) between populations of giants …

Table of Contents of: "Asteroseismology of Stellar Populations in the Milky Way"

We give here the Table of Contents and clickable links to papers of the proceedings from the workshop "Asteroseismology of Stellar Populations in the Milky Way", held in Sesto, 22-26 July 2013. The aim of this workshop was to foster collaborations and discussions between expert researchers in Galactic evolution, specialists in stellar structure and asteroseismology, and key representatives of extensive ground-based spectroscopic surveys such as APOGEE and the ESO-Gaia Spectroscopic Survey. The workshop was devoted to discussing first results achieved by combining spectroscopic and seismic cons…

利用TESS和Gaia测试银河系盘中超低振幅造父变星候选体

Testing ultralow amplitude Cepheid candidates in the Galactic disk by TESS and Gaia

本研究利用CoRoT、2MASS、Gaia DR3和TESS数据分析了银河系中的6个超低振幅造父变星候选体，发现它们并非脉动变星，而是比造父变星更蓝或更暗的自转诱导变星。

利用Gaia和TESS全面搜寻热亚矮星 I. 脉动热亚矮B型星

A comprehensive search for hot subdwarf stars using Gaia and TESS I. Pulsating hot subdwarf B stars

本研究整合多源数据构建已确认脉动热亚矮B型星数据集，提出基于Gaia DR3样本的搜寻方法，利用TESS数据发现61颗新脉动sdB星及20颗待后续光谱观测确定变源的sdB星，助力该星族的全面研究。