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Nine new Delta Scuti stars
Differential photometry in the V and B wavebands is presented for elevendeltaScuti stars. Nine of the stars were not previously known to bevariable stars. All the stars are bright, being in the Henry Drapercatalogue. Physical characteristics of the stars are estimated frompublished spectroscopy or photometry, and pulsation constants arederived. The recently discovered deltaScuti star II Vir may be alambdaBootis star.
| Starlight polarization in the direction of two H I complexes
Upper limits to the gas/dust ratio in the direction of two complexes arederived based on 21-cm line observations and starlight polarizationmeasurements. Elongated H I structures parallel to the galactic magneticfield suggest that the gas and dust comprise a common cloud or cloudsystem. Dust producing the starlight polarization is mixed with the H Igas, aiding in estimating the distance for the two H I complexes.Distances of 100 pc for the filament at low velocities and of 200 pc foran intermediate-velocity cloud complex (IVC) are established frompolarimetric data, and possible origins for the filaments and IVC aresuggested.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Ressam |
| Sað Açýklýk: | 06h17m04.69s |
| Yükselim: | -55°24'52.9" |
| Görünürdeki Parlaklýk: | 7.612 |
| Uzaklýk: | 216.45 parsek |
| özdevim Sað Açýklýk: | -12.3 |
| özdevim Yükselim: | 6.4 |
| B-T magnitude: | 7.704 |
| V-T magnitude: | 7.62 |
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