Particle Acceleration in the Cygnus Superbubble
- HAWC Collaboration,
- A. U. Abeysekara(Author),
- A. Albert(Author),
- R. Alfaro(Author),
- C. Alvarez(Author),
- J. D. Álvarez(Author)
- University of Utah,
- Los Alamos National Laboratory,
- Universidad Nacional Autónoma de México,
- Universidad Autonoma de Chiapas,
- Universidad Michoacana de San Nicolas de Hidalgo,
- Pennsylvania State University
Research Output:
Chapter in Book/Report/Conference proceeding
Conference contribution
Publication metrics
Metrics
SciVal
Author count
134
SciVal
Paper percentile
20
Abstract
The Cygnus Cocoon is the first gamma-ray superbubble powered by a massive stellar association, the OB2 association. It was postulated that the combined effects of the stellar winds of all the massive O-type stars of the OB2 association can accelerate the cosmic rays to PeV energy in the Cocoon. The conclusive proof of acceleration to PeV energy in the Cocoon will identify the stellar association as a PeV cosmic-ray accelerator, known as PeVatron. However, the Cocoon has been previously studied only up to 10 TeV. In this contribution, using 1343 days of High Altitude Water Cherenkov (HAWC) observatory data, we present the morphological and spectral study of the Cocoon above 1 TeV to beyond 100 TeV. The analysis at higher TeV energies reveals a softer spectrum compared to the GeV gamma-ray observation. This result suggests that the accelerator's efficiency decreases around hundreds of TeV, or after being accelerated, the highest-energy protons escape the region. The study above 10 TeV presented here demonstrates how CR accelerators operate in these extreme energies and how particle transport impacts high-energy emission.
Publication Information
Output type
Research Output:
Chapter in Book/Report/Conference proceeding
Conference contribution
Original language
EnglishPublication milestones
- Published - 18/03/2022
Publication status
Published - 18/03/2022
Volume
395Publication series
- Publisher name: Sissa Medialab Srl
Publication series name: Proceedings of Science
Publication IDs
- Scopus: 85144596643
Host publication title
Particle Acceleration in the Cygnus SuperbubbleAccess to documents
Related Event
Title
37th International Cosmic Ray Conference, ICRC 2021
Event type
ConferenceDate
12/07/2021 - 23/07/2021Location
Virtual, BerlinGermany
Funding Details
We acknowledge the support from: the US National Science Foundation (NSF); the US Department of Energy Office of High-Energy Physics; the Laboratory Directed Research and Development (LDRD) program of Los Alamos National Laboratory; Consejo Nacional de Ciencia y Tecnología (CONACyT), México, grants 271051, 232656, 260378, 179588, 254964, 258865, 243290, 132197, A1-S-46288, A1-S-22784, cátedras 873, 1563, 341, 323, Red HAWC, México; DGAPA-UNAM grants IG101320, IN111716-3, IN111419, IA102019, IN110621, IN110521; VIEP-BUAP; PIFI 2012, 2013, PROFOCIE 2014, 2015; the University of Wisconsin Alumni Research Foundation; the Institute of Geophysics, Planetary Physics, and Signatures at Los Alamos National Laboratory; Polish Science Centre grant, DEC-2017/27/B/ST9/02272; Coordinación de la Investigación Científica de la Universidad Michoacana; Royal Society - Newton Advanced Fellowship 180385; General-itat Valenciana, grant CIDEGENT/2018/034; Chulalongkorn University’s CUniverse (CUAASC) grant; Coordinación General Académica e Innovación (CGAI-UdeG), PRODEP-SEP UDG-CA-499; Institute of Cosmic Ray Research (ICRR), University of Tokyo, H.F. acknowledges support by NASA under award number 80GSFC21M0002. We also acknowledge the significant contributions over many years of Stefan Westerhoff, Gaurang Yodh and Arnulfo Zepeda Dominguez, all deceased members of the HAWC collaboration. Thanks to Scott Delay, Luciano Díaz and Eduardo Murrieta for technical support.
We acknowledge the support from: the US National Science Foundation (NSF); the US Department of Energy Office of High-Energy Physics; the Laboratory Directed Research and Development (LDRD) program of Los Alamos National Laboratory; Consejo Nacional de Ciencia y Tecnología (CONACyT), México, grants 271051, 232656, 260378, 179588, 254964, 258865, 243290, 132197, A1-S-46288, A1-S-22784, cátedras 873, 1563, 341, 323, Red HAWC, México; DGAPA-UNAM grants IG101320, IN111716-3, IN111419, IA102019, IN110621, IN110521; VIEP-BUAP; PIFI 2012, 2013, PROFOCIE 2014, 2015; the University of Wisconsin Alumni Research Foundation; the Institute of Geophysics, Planetary Physics, and Signatures at Los Alamos National Laboratory; Polish Science Centre grant, DEC-2017/27/B/ST9/02272; Coordinación de la Investigación Científica de la Universidad Michoacana; Royal Society - Newton Advanced Fellowship 180385; Generalitat Valenciana, grant CIDEGENT/2018/034; Chulalongkorn University's CUniverse (CUAASC) grant; Coordinación General Académica e Innovación (CGAI-UdeG), PRODEP-SEP UDG-CA-499; Institute of Cosmic Ray Research (ICRR), University of Tokyo, H.F. acknowledges support by NASA under award number 80GSFC21M0002. We also acknowledge the significant contributions over many years of Stefan Westerhoff, Gaurang Yodh and Arnulfo Zepeda Dominguez, all deceased members of the HAWC collaboration. Thanks to Scott Delay, Luciano Díaz and Eduardo Murrieta for technical support.
FundersFunding numbers
CUAASC
-Chulalongkorn University's CUniverse
-Chulalongkorn University's CUniverse
-Coordinación General Académica e Innovación
PRODEP-SEP UDG-CA-499
Coordinación de la Investigación Científica de la Universidad Michoacana
-Institute of Geophysics
-Planetary Physics
-Polish Science Centre
DEC-2017/27/B/ST9/02272
US Department of Energy Office of High-Energy Physics
-University of Wisconsin Alumni Research Foundation
-VIEP-BUAP
-NSF
-NASA
80GSFC21M0002
NASA
-LDRD
-LANL
-Royal Society
180385
Royal Society
-CONACYT
271051, A1-S-46288, 254964, 258865, A1-S-22784, 260378, 132197, 179588, 232656, 243290
CONACYT
-GVA
CIDEGENT/2018/034
GVA
-University of Tokyo
-DGAPA, UNAM
IN111419, IG101320, IN111716-3, IN110621, IA102019, IN110521
DGAPA, UNAM
-