File:Aa37031-19.pdf
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
Size of this JPG preview of this PDF file: 424 × 600 pixels. Other resolutions: 170 × 240 pixels | 339 × 480 pixels | 543 × 768 pixels | 1,239 × 1,752 pixels.
Original file (1,239 × 1,752 pixels, file size: 2.67 MB, MIME type: application/pdf, 12 pages)
File information
Structured data
Captions
Summary
[edit]DescriptionAa37031-19.pdf |
English: The binary system η Carinae is a unique laboratory that facilitates the study of particle acceleration to high energies under a wide range of conditions, including extremely high densities around periastron. To date, no consensus has emerged as to the origin of the gigaelectronvolt γ-ray emission in this important system. With a re-analysis of the full Fermi-LAT data set for η Carinae, we show that the spectrum is consistent with a pion decay origin. A single population leptonic model connecting X-ray to γ-ray emission can be ruled out. We revisit our physical model from 2015, based on two acceleration zones associated with the termination shocks in the winds of both stars. We conclude that inverse Compton emission from in-situ accelerated electrons dominates the hard X-ray emission detected with NuSTAR at all phases away from periastron and that pion-decay from shock accelerated protons is the source of γ-ray emission. Very close to periastron there is a pronounced dip in hard X-ray emission, concomitant with the repeated disappearance of the thermal X-ray emission, which we interpret as due to the suppression of significant electron acceleration in the system. Within our model, the residual emission seen by NuSTAR at this phase can be accounted for with secondary electrons produced in interactions of accelerated protons, which agrees with the variation in pion-decay γ-ray emission. Future observations with H.E.S.S., CTA, and NuSTAR should confirm or refute this scenario. |
Date | |
Source |
https://www.aanda.org/articles/aa/abs/2020/03/aa37031-19/aa37031-19.html https://doi.org/10.1051/0004-6361/201937031 |
Author | R. White, M. Breuhaus, R. Konno, S. Ohm, B. Reville and J.A. Hinton |
Licensing
[edit]This file is licensed under the Creative Commons Attribution 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 21:43, 3 July 2020 | 1,239 × 1,752, 12 pages (2.67 MB) | Pamputt (talk | contribs) | Uploaded a work by R. White, M. Breuhaus, R. Konno, S. Ohm, B. Reville and J.A. Hinton from https://www.aanda.org/articles/aa/abs/2020/03/aa37031-19/aa37031-19.html https://doi.org/10.1051/0004-6361/201937031 with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Short title | Gamma-ray and X-ray constraints on non-thermal processes in η Carinae |
---|---|
Image title | A\&A 635, A144 (2020). DOI: 10.1051/0004-6361/201937031 |
Author | White R., Breuhaus M., Konno R., Ohm S., Reville B., Hinton J.A. |
Keywords |
|
Software used | LaTeX with hyperref package |
Conversion program | pdfTeX-1.40.14 |
Encrypted | no |
Page size | 595.276 x 841.89 pts (A4) |
Version of PDF format | 1.5 |
Structured data
Items portrayed in this file
depicts
24 March 2020
application/pdf
b35e5a62c57c35673546677234a943c1c7b876f2
2,796,271 byte
1,752 pixel
1,239 pixel
Hidden categories: