Home     Baþlangýç     Evrende yaþayabilmek için    
Inhabited Sky
    News@Sky     Gökyüzü görüntüsü     Koleksiyon     Forum     Blog New!     SSS     Basýn     Giriþ  

TYC 8613-1963-1


Ýçindekiler

Görüntüler

Resim Yükleyin

DSS Images   Other Images


Ýlgili Makaleler

A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun
Traditionally, runaway stars are O- and B-type stars with large peculiarvelocities. We would like to extend this definition to young stars (upto ?50 Myr) of any spectral type and to identify those present in theHipparcos catalogue by applying different selection criteria, such aspeculiar space velocities or peculiar one-dimensional velocities.Runaway stars are important for studying the evolution of multiple starsystems or star clusters, as well as for identifying the origins ofneutron stars. We compile the distances, proper motions, spectral types,luminosity classes, V magnitudes and B-V colours, and we utilizeevolutionary models from different authors to obtain star ages. We studya sample of 7663 young Hipparcos stars within 3 kpc from the Sun. Theradial velocities are obtained from the literature. We investigate thedistributions of the peculiar spatial velocity and the peculiar radialvelocity as well as the peculiar tangential velocity and itsone-dimensional components and we obtain runaway star probabilities foreach star in the sample. In addition, we look for stars that aresituated outside any OB association or OB cluster and the Galactic planeas well as stars for which the velocity vector points away from themedian velocity vector of neighbouring stars or the surrounding local OBassociation/cluster (although the absolute velocity might be small). Wefind a total of 2547 runaway star candidates (with a contamination ofnormal Population I stars of 20 per cent at most). Thus, aftersubtracting these 20 per cent, the runaway frequency among young starsis about 27 per cent. We compile a catalogue of runaway stars, which isavailable via VizieR.

A search for OB associations near southern long-period Cepheids. I - WZ Carinae, YZ Carinae, KK Centauri, and OO Centauri
Results are reported for a search for OB associations in the vicinitiesof four southern Cepheids with periods longer than 11 days. UBVphotoelectric and photographic data were used to search for associationsnear WZ Car, YZ Car, KK Cen, and OO Cen. No evidence is found for theexistence of OB associations around the first three Cepheids, but somepossible OB stars are detected near OO Cen. A possible early-typecompanion of YZ Car is also found.

Yeni bir Makale Öner


Ýlgili Baðlantýlar

  • - Baðlantý Bulunamadý -
Yeni Bir Baðlantý Öner


sonraki gruplarýn üyesi:


Gözlemler ve gökölçümü verileri

Takýmyýldýz:Karina
Sað Açýklýk:10h28m11.65s
Yükselim:-59°13'35.3"
Görünürdeki Parlaklýk:9.34
özdevim Sað Açýklýk:-15.8
özdevim Yükselim:3.6
B-T magnitude:9.396
V-T magnitude:9.345

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
TYCHO-2 2000TYC 8613-1963-1
USNO-A2.0USNO-A2 0300-09719309
HIPHIP 51256

→ VizieR 'den daha fazla katalog ve tanýmlama isteyin