Preliminary Results of A World Wide Photoelectric Campaign on δ Scuti
نویسندگان
چکیده
منابع مشابه
Multi - Site Observations of Δ Scuti Stars 7 Aql and 8 Aql ( a New Δ Scuti Variable ) : the Twelfth Stephi Campaign in 2003
We present an analysis of the pulsation behaviour of the δ Scuti stars 7 Aql (HD 174532) and 8 Aql (HD 174589) – a new variable star – observed in the framework of STEPHI XII campaign during 2003 June–July. 183 hours of high precision photometry were acquired by using four-channel photometers at three sites on three continents during 21 days. The light curves and amplitude spectra were obtained...
متن کاملFinding Code on the World Wide Web: A Preliminary Investigation
To find out what kind of design structures programmers really use, we need to examine a wide variety of programs. Unfortunately most program source code is proprietary and is unavailable for analysis. The World Wide Web (Web) potentially can provide a rich source of programs for study. The freely available code on the Web, if in sufficient quality and quantity, can provide a window into softwar...
متن کاملeffects of first language on second language writing-a preliminary contrastive rhetoric study of farsi and english
to explore the idea the investingation proposed, aimed at finding whether the performances of the population of iranians students studying english in an efl context are consistent in l1 and l2 writing taks and whether there is a cross-linguistic transfer in this respect. in this regard the subjects were instructed to write four compositions-two in english and two in farsi-which consisted of an ...
15 صفحه اولPeriod changes of δ Scuti stars and stellar evolution
Period changes of δ Scuti stars have been collected or redetermined from the available observations and are compared with values computed from evolutionary models with and without convective core overshooting. For the radial pulsators of Pop. I, the observations indicate (1/P) dP/dt values around 10 year with equal distribution between period increases and decreases. The evolutionary models, on...
متن کاملAmplitude investigation of δ Scuti variables in open clusters
We report here the results of a statistical analysis of 28 δ Scuti stars from five open clusters, α Persei, Pleiades, Hyades, Praesepe and Coma. These δ Scuti variables, most of which are on the main sequence, tend to show a positive correlation between oscillation amplitude and absolute luminosity. No correlation is found between amplitude and effective temperature .
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: International Astronomical Union Colloquium
سال: 1989
ISSN: 0252-9211
DOI: 10.1017/s0252921100011842