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Jet outflow and gamma-ray emission correlations in S5 0716+714.
- Source :
-
Astronomy & Astrophysics / Astronomie et Astrophysique . Nov2014, Vol. 571, p1-5. 5p. - Publication Year :
- 2014
-
Abstract
- Using millimeter very long baseline interferometry (VLBI) observations of the BL Lac object S5 0716+714 from August 2008 to September 2013, we investigate variations in the core flux density and orientation of the sub-parsec scale jet, i.e. position angle. The γ-ray data obtained by the Fermi Large Area Telescope are used to investigate the high-energy flux variations over the same time period. For the first time in any blazar, we report a significant correlation between the γ-ray flux variations and the position angle variations in the VLBI jet. The cross-correlation analysis also indicates a positive correlation such that the mm-VLBI core flux density variations are delayed with respect to the γ-ray flux by 82 ±32 days. This suggests that the high-energy emission is coming from a region located ±(3.8 ± 1.9) parsecs upstream of the mm-VLBI core (closer to the central black hole). These results imply that the observed inner jet morphology has a strong connection with the observed γ-ray flares. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00046361
- Volume :
- 571
- Database :
- Academic Search Index
- Journal :
- Astronomy & Astrophysics / Astronomie et Astrophysique
- Publication Type :
- Academic Journal
- Accession number :
- 99580585
- Full Text :
- https://doi.org/10.1051/0004-6361/201424796