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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.
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Observation and Astrometry data
| Constellation: | Lupus |
| Right ascension: | 15h49m22.20s |
| Declination: | -33°12'47.5" |
| Apparent magnitude: | 9.458 |
| Proper motion RA: | 23.6 |
| Proper motion Dec: | -34.1 |
| B-T magnitude: | 10.297 |
| V-T magnitude: | 9.528 |
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