Research Ideas and Outcomes : Research Idea
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Corresponding author: Yuanchuan Zou (zouyc@hust.edu.cn)
Received: 13 Dec 2015 | Published: 28 Dec 2015
© 2015 Yuanchuan Zou.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation: Zou Y (2015) Determining the direction of a gamma-ray burst's jet in its host galaxy. Research Ideas and Outcomes 1: e7506. doi: 10.3897/rio.1.e7506
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A gamma-ray burst (GRB) launches a jet towards the observer. However, it is not clear what the orientation of the GRB jet is with respect to the host galaxy.
We suggest the direction can be obtained from the morphology of the host galaxy. If the host glaxies are mostly face-on, that means the GRB jets are perpendicular to the galaxy disk.
GRB, relativistic jet, galaxy
Gamma-ray bursts (GRBs) are the most violent explosion in the universe (
The jets are believed to be aligned with the spin axis of the central engine, whose spin has in turn been preserved from the progenitor. For long GRBs, the progenitors are massive stars. It is not clear how the spin of the star relates to the spin of the galaxy.
Here, we suggest to use the morphorlogy to determine the direction of the GRB jets. Under extreme conditions, if all the jets are aligned with the host galaxy spin, we should see the host galaxies all face-on. In reality, the morphorlogy should be diverse and may have some tendancy like more face-on galaxies than edge-on ones.
Therefore, it is possible to measure the morphology of the host galaxies, to determine the distribution of the GRB jet direction.
This could show the connection of star formation and galaxy formation. If the GRB jets are aligned with the spin of the host galaxy, the probability that they would destroy possible life decreases.
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