Ýçindekiler
Görüntüler
Resim Yükleyin
DSS Images Other Images
Ýlgili Makaleler
The short-period end of the contact binary period distribution based on the All-Sky Automated Survey
The search volume-corrected period distribution of contact binaries ofthe W UMa type appears to reflect primarily the constant number ratio of~=1/500 to the number of stars along the main sequence; there exist noevidence for angular momentum evolution. The maximum in contact binarynumbers is located at shorter periods than estimated before, P ~= 0.27d. The drop in numbers towards the cut-off at P ~= 0.215-0.22 d stillsuffers from the small number statistics while the cut-off itselfremains unexplained. Only one out of seven short-period All-SkyAutomated Survey variables with P < 0.22 d have been retained in thesample considered here within 8 < V < 13; this short-periodfield-sky record holder at P = 0.2178 d should be studied.
| A homogeneous catalog of new UBV and H-beta photometry of B- and A-type stars in and around the Scorpius-Centaurus OB association
B- and A-type stars in and near the Sco-Cen OB association areinvestigated with UBV and H-beta photometry to acquire data relevant tothe luminosity function of Sco-Cen. The measurements generally consistof two 10-s integrations of U, B, V, (W, N) filters, and theobservations are corrected iteratively for atmospheric extinction andinstrumental response. The data presented give the mean V magnitude,mean B-V, mean U-B, and the estimated uncertainties for these values.The catalog provides a homogeneous catalog of data for a large fieldwith stellar objects delineating membership to the association Sco-Cenand that affect the luminosity function of the aggregate.
|
Yeni bir Makale Öner
Ýlgili Baðlantýlar
Yeni Bir Baðlantý Öner
sonraki gruplarýn üyesi:
|
Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Akrep |
| Sað Açýklýk: | 16h21m55.07s |
| Yükselim: | -21°28'41.7" |
| Görünürdeki Parlaklýk: | 10.101 |
| özdevim Sað Açýklýk: | -23.5 |
| özdevim Yükselim: | -13.3 |
| B-T magnitude: | 10.708 |
| V-T magnitude: | 10.152 |
Kataloglar ve belirtme:
|
