Ýçindekiler
Görüntüler
Resim Yükleyin
DSS Images Other Images
Ýlgili Makaleler
Further identification of ROSAT all-sky survey sources in Orion
We report on the identification of 22 ROSAT All-Sky Survey (RASS) X-raysources distributed in the general direction of the Orion star-formingregion. The X-ray sample contains sources from the ROSAT bright sourcecatalogue and from previous detections. The optical identifications arebased on intermediate-resolution spectroscopy and UBV Johnson photometryusing a 1m-class telescope. The strengths of the Hα , Na I D_2 andlithium lines for the stellar counterparts are evaluated applying thespectral subtraction technique, using templates of the same spectraltype. Radial velocities of the optical counterparts are also reported.Thirteen of the optical counterparts show the lithium absorption line intheir spectra and have radial velocities consistent with the Orion starforming region. Four of these objects can be classified as new bona-fideT Tauri stars.Based on observations collected at Catania Astrophysical Observatory,Italy.
|
Yeni bir Makale Öner
Ýlgili Baðlantýlar
Yeni Bir Baðlantý Öner
sonraki gruplarýn üyesi:
|
Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Avci |
| Sað Açýklýk: | 05h03m28.68s |
| Yükselim: | +09°01'42.4" |
| Görünürdeki Parlaklýk: | 9.537 |
| özdevim Sað Açýklýk: | 6.4 |
| özdevim Yükselim: | -5 |
| B-T magnitude: | 9.617 |
| V-T magnitude: | 9.544 |
Kataloglar ve belirtme:
|
