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Emission-line stars with infrared dust emission - Implications of the galactic distribution
Near-infrared photometry of a final selection of emission-line stars ispresented. A sample of about 700 such stars is analyzed and it is shownthat those with circumstellar dust have a spiral arm distribution in thegalaxy. The peculiar Be stars with dust are also considered inisolation; these too are found to have a Population I distribution. Itis therefore unlikely that they are symbiotic stars or the progenitorsof normal planetary nebulae; they probably form a distinct type whosenearest relatives are the VV Cephei stars.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Terazi |
| Sað Açýklýk: | 15h22m21.81s |
| Yükselim: | -25°27'34.2" |
| Görünürdeki Parlaklýk: | 7.836 |
| Uzaklýk: | 367.647 parsek |
| özdevim Sað Açýklýk: | -18.7 |
| özdevim Yükselim: | 2.5 |
| B-T magnitude: | 9.603 |
| V-T magnitude: | 7.982 |
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NEWS@SKY (Science&Space News)
