The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
High-resolution spectra in the H-band (1.55-1.56 μm) were obtained with the Phoenix spectrograph at the 2.1 m Kitt Peak telescope, for the observation of OH lines in 14 metal-poor stars of metallicities -0.8<[Fe/H]<-2.2. Results of [O/Fe]~+0.43 are in agreement with oxygen-to-iron ratios derived from the forbidden [O I] lines, and in disagreement with the high [O/Fe] derived from permitted O...
The NLTE effects affecting oxygen-abundance determinations of solar-type stars are discussed. LTE is perfectly safe for the forbidden lines. The permitted triplet at 777nm is expected to show NLTE effects on the order of a few tenths of a dex (always in the sense that LTE overestimates the abundance), but the magnitude of the effects is dependent on the still very uncertain cross sections of collisional...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.