2004A&A...427..959C


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET02:21:29

2004A&A...427..959C - Astronomy and Astrophysics, volume 427, 959-963 (2004/12-1)

Optical polarimetric observations of the microquasar LS 5039.

COMBI J.A., CELLONE S.A., MARTI J., RIBO M., MIRABEL I.F. and CASARES J.

Abstract (from CDS):

We present the first optical polarimetric observations of the runaway microquasar LS 5039. Our results reveal the presence of a large amount (∼5%) of polarized emission towards this binary system. By combining polarimetric and spectroscopic observations of some stars in the field together with available statistical information on the galactic interstellar polarization of the region, we have estimated and subtracted the contribution of the interstellar polarization in this direction. As a result, we obtain an intrinsic polarization of ∼3% for the object, much higher than what would be expected from jet emission in the optical domain. We suggest that the polarized light originates by electron Thomson scattering in the stellar envelope of the companion star. This allows us to constrain the size of the region where the polarized emission originates, as well as estimating the scattering electronic density and the wind velocity at such distance.

Abstract Copyright:

Journal keyword(s): stars: individual: LS 5039 - X-rays: binaries - stars: binaries: general - polarization

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1741 1
2 2MASS J18260615-1451337 * 18 26 06.16 -14 51 33.8   12.2 11.6     ~ 2 0
3 TYC 5702-731-1 * 18 26 08.8940804146 -14 49 38.958323162   12.41 11.42     ~ 2 0
4 USNO-A2.0 0750-13157416 * 18 26 11.2094797911 -14 50 15.396374030   17.1 15.5     ~ 1 0
5 USNO-A2.0 0750-13157934 * 18 26 11.9540797647 -14 51 12.439972989   14.6 13.7     ~ 2 0
6 V* V479 Sct HXB 18 26 15.0561532140 -14 50 54.249464136 12.02 12.23 11.27 11.04   ON6V((f))z 503 2
7 TYC 5702-949-1 * 18 26 18.1147690038 -14 53 54.466694343   12.65 11.23     ~ 1 0
8 USNO-A2.0 0750-13170022 * 18 26 27.4810815883 -14 49 22.046587194   13.5 12.4     ~ 2 0

    Equat.    Gal    SGal    Ecl

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2021.02.26-02:21:29

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