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HD 139560


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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:おおかみ座
Right ascension:15h40m05.87s
Declination:-35°42'01.9"
Apparent magnitude:9.991
Proper motion RA:-42.6
Proper motion Dec:-23.8
B-T magnitude:10.667
V-T magnitude:10.047

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 139560
TYCHO-2 2000TYC 7339-30-1
USNO-A2.0USNO-A2 0525-19973936
HIPHIP 76727

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