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The infrared void in the Lupus dark clouds revisited: a polarimetric approach
The results of B-band CCD imaging linear polarimetry obtained for starsfrom the Hipparcos catalogue are used to re-examine the distribution ofthe local interstellar medium towards the IRAS 100-μm emission voidin the Lupus dark clouds. The analysis of the obtainedparallax-polarization diagram assigns to the dark cloud Lupus1 adistance between 130 and 150pc and assures the existence of a low columndensity region coincident with the observed infrared void. Moreover,there are clear indications of the existence of absorbing material atdistances closer than 60-100pc, which may be associated with theinterface boundary between the Local Bubble and its neighbourhood LoopIsuperbubble.
| SANTIAGO 91, a right ascension catalogue of 3387 stars (equinox J2000).
The positions in right ascension of 3387 stars belonging to the Santiago67 Catalogue, observed with the Repsold Meridian Circle at Cerro Calan,National Astronomical Observatory, during the period 1989 to 1994, aregiven. The average mean square error of a position, for the wholeCatalogue, is +/-0.009 s. The mean epoch of the catalogue is 1991.84.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Kurt |
| Sað Açýklýk: | 15h31m44.76s |
| Yükselim: | -32°37'24.3" |
| Görünürdeki Parlaklýk: | 8.043 |
| Uzaklýk: | 128.041 parsek |
| özdevim Sað Açýklýk: | -53.9 |
| özdevim Yükselim: | 44.1 |
| B-T magnitude: | 9.446 |
| V-T magnitude: | 8.159 |
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