Extension of the effective temperature scale of giants to types later than M 6
نویسنده
چکیده
Effective temperatures for nine giant stars are derived from recent diameter determinations at 2.2μmwith the FLUOR beam combiner on the IOTA interferometer. A good overlap with previous studies for stars earlier than M6 is verified. The present paper extends the temperature scale of giant stars based on direct measurements to types between M6 and M8.
منابع مشابه
Constraints to Effective Use of Information Communication Technologies (ICTs) among Small-scale Farmers in Anambra State, Nigeria
The study was carried out in Anambra State, Nigeria. Questionnaire was used to collect data from a sample of one hundred and eight (108) small-scale farmers. Percentage, mean score, standard deviation and factor analysis were used for data analysis. The duration of the study was June 2009 and March, 2010. Results of the study indicated that the major constraints to effective use of ICTs by smal...
متن کاملEquilibrium-Line Altitudes of Late Quaternary Glaciers in the Zardkuh Mountain, Iran
Equilibrium-line altitudes (ELAs) of former glaciers in the Zardkuh Mountain of the Zagros Mountain Range were reconstructed from glacial-geologic data on former ice limits by using various methods. In the study area various types of glacial landforms such as outwash fans, moraines and well developed glacial cirques are observed. The results suggest that ELA were depressed 1433 m below to prese...
متن کاملEffectiveness of Thermostable Vaccine for Newcastle Disease Produced by the Razi Institute on Backyard Poultry in Iran during 2015
Newcastle disease causes many economic losses to the poultry industry in most countries. This disease is endemic in Iran. Backyard poultry is considered the reservoir of Newcastle virus; however, there is either no vaccination program against Newcastle, or it is performed in a restricted manner. Commercial live vaccines are inactive and sensitive to temperature; moreover, vaccine delivery to vi...
متن کاملA new calibration of stellar parameters of Galactic O stars
We present new calibrations of stellar parameters of O stars at solar metallicity taking non-LTE, wind, and line-blanketing effects into account. Gravities and absolute visual magnitudes are derived from results of recent spectroscopic analyses. Two types of effective temperature scales are derived: one from a compilation based on recent spectroscopic studies of a sample of massive stars – the ...
متن کاملCOMPARISON OF FOUR PCR TESTS FOR THE DETECTION OF MYCOPLASMA PNEUMONIAE
Recently PCR is being used more frequently as a diagnostic method to detect M. pneumoniae. We used primer pairs reported by Van Kuppeveld,13 Leng,5 Lunerberg,7 an Bernet' targeting 16s rRNA, PI protein, tuf genes. and a short DNA equence (MP5) to evaluate the sensitivity among different PCRs. Reoptimization experiments showed that tuf PCR had the highest sensitivity amongst these four PCRs, det...
متن کامل