2026ApJ..1000L..45J


Query : 2026ApJ..1000L..45J

2026ApJ..1000L..45J - Astrophys. J., 1000, L45 (2026/April-1)

A Large Misalignment between Continuous Jet and Discrete Ejecta in Microquasar GRS 1915+105 during Its Obscured Phase.

JIANG W., YAN X., YAN Z., LI Y.-P., CUI L. and SHEN Z.-Q.

Abstract (from CDS):

We report a large misalignment between the continuous jet and the discrete ejecta in GRS 1915+105, detected in 2023 April with the East Asian VLBI network (EAVN). Two-sided ejecta are shown at 6.7 GHz images, and central continuous jets are resolved at 43 GHz by EAVN quasi-simultaneously. While the continuous jet was aligned with the long-standing jet position angle (PA) of ∼147∘, the discrete ejecta appeared at a markedly different PA ∼188∘, with the lowest intrinsic velocity ∼0.35c ever reported. A similar misalignment of PA between discrete ejecta and continuous jet was independently detected in late September of 2023 during a consecutive flare event. The pronounced and recurrent angular deviations suggest a time-variable jet launching geometry, which, in conjunction with the observed X-ray obscuration, can be attributable to a warped accretion disk. Our result could offer new insight into the fundamental differences between continuous jet and discrete ejecta, and broadly provides a clue to understand the phenomena for transient black hole X-ray binaries and changing-look active galactic nuclei during the X-ray-obscured phase.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Low-mass x-ray binary stars

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2810 0
2 V* V404 Cyg HXB 20 24 03.8247037434 +33 52 01.961154861           G9/K0III/V 1370 0

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