Globular cluster interstellar media: ionized and ejected by white dwarfs
نویسندگان
چکیده
منابع مشابه
First VLT spectra of white dwarfs in a globular cluster
We present the first spectra obtained with the Very Large Telescope for white dwarfs in a globular cluster. Estimates of atmospheric parameters are obtained and compared to evolutionary tracks. We discuss possible implications for the distance scale of globular clusters and white dwarf evolution and demonstrate how white dwarfs might be used to establish an independent distance scale to globula...
متن کاملHelium-Core White Dwarfs in Globular Clusters
We examine the theoretical implications of a population of low-mass heliumcore white dwarfs in globular clusters. In particular, we focus on the observed population in the core of NGC 6397, where several low-mass white dwarf canditates have been identified as “non-flickerers” by Cool and collaborators. Age and mass estimates from cooling models, combined with dynamical and evolutionary consider...
متن کاملDiscovery of More than Two Thousand White Dwarfs in the Globular Cluster Ω Centauri
We present deep multiband (F435W, F625W, and F658N) photometric data of the Globular Cluster ω Cen collected with the Advanced Camera for Surveys on board of the Hubble Space Telescope. We identified in the (F435W-F625W, F435W) plane more than two thousand White Dwarf (WD) candidates using three out of nine available pointings. Such a large sample appears in agreement with predictions based on ...
متن کاملSpectral types and masses of white dwarfs in globular clusters , ,
White dwarfs in globular clusters offer additional possibilities to determine distances and ages of globular clusters, provided their spectral types and masses are known. We therefore started a project to obtain spectra of white dwarfs in the globular clusters NGC 6397 and NGC 6752. All observed white dwarfs show hydrogen-rich spectra and are therefore classified as DA. Analysing the multi-colo...
متن کاملLetter to the Editor First VLT spectra of white dwarfs in a globular cluster
We present the first spectra obtained with the Very Large Telescope for white dwarfs in a globular cluster. Estimates of atmospheric parameters are obtained and compared to evolutionary tracks. We discuss possible implications for the distance scale of globular clusters and white dwarf evolution and demonstrate how white dwarfs might be used to establish an independent distance scale to globula...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2014
ISSN: 1365-2966,0035-8711
DOI: 10.1093/mnras/stu2202