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Title: SEARCHING FOR OVERIONIZED PLASMA IN THE GAMMA-RAY-EMITTING SUPERNOVA REMNANT G349.7+0.2

Abstract

G349.7+0.2 is a supernova remnant (SNR) expanding in a dense medium of molecular clouds and interacting with clumps of molecular material emitting gamma-rays. We analyzed the gamma-ray data of the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope and detected G349.7+0.2 in the energy range of 0.2–300 GeV with a significance of ∼13σ, showing no extended morphology. Modeling of the gamma-ray spectrum revealed that the GeV gamma-ray emission dominantly originates from the decay of neutral pions, where the protons follow a broken power-law distribution with a spectral break at ∼12 GeV. To search for features of radiative recombination continua in the eastern and western regions of the remnant, we analyzed the Suzaku data of G349.7+0.2 and found no evidence for overionized plasma. In this paper, we discuss possible scenarios to explain the hadronic gamma-ray emission in G349.7+0.2 and the mixed morphology nature of this SNR.

Authors:
;  [1]; ;  [2];  [3];  [4]
  1. TUBITAK Space Technologies Research Institute, ODTU Campus, 06531, Ankara (Turkey)
  2. Saha Institute of Nuclear Physics, Kolkata, West Bengal 700064 (India)
  3. Akdeniz University, Faculty of Education, Department of Secondary Science and Mathematics Education, Antalya, 07058 (Turkey)
  4. Bogazici University, Physics Department, Bebek, 34342, Istanbul (Turkey)
Publication Date:
OSTI Identifier:
22522441
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 804; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMIC RAY DETECTION; GAMMA RADIATION; GAMMA SPECTRA; GEV RANGE; MORPHOLOGY; PIONS NEUTRAL; PLASMA; RECOMBINATION; SPACE; SUPERNOVA REMNANTS; TELESCOPES; X RADIATION

Citation Formats

Ergin, T., Sezer, A., Saha, L., Majumdar, P., Gök, F., and Ercan, E. N., E-mail: tulun.ergin@tubitak.gov.tr. SEARCHING FOR OVERIONIZED PLASMA IN THE GAMMA-RAY-EMITTING SUPERNOVA REMNANT G349.7+0.2. United States: N. p., 2015. Web. doi:10.1088/0004-637X/804/2/124.
Ergin, T., Sezer, A., Saha, L., Majumdar, P., Gök, F., & Ercan, E. N., E-mail: tulun.ergin@tubitak.gov.tr. SEARCHING FOR OVERIONIZED PLASMA IN THE GAMMA-RAY-EMITTING SUPERNOVA REMNANT G349.7+0.2. United States. doi:10.1088/0004-637X/804/2/124.
Ergin, T., Sezer, A., Saha, L., Majumdar, P., Gök, F., and Ercan, E. N., E-mail: tulun.ergin@tubitak.gov.tr. Sun . "SEARCHING FOR OVERIONIZED PLASMA IN THE GAMMA-RAY-EMITTING SUPERNOVA REMNANT G349.7+0.2". United States. doi:10.1088/0004-637X/804/2/124.
@article{osti_22522441,
title = {SEARCHING FOR OVERIONIZED PLASMA IN THE GAMMA-RAY-EMITTING SUPERNOVA REMNANT G349.7+0.2},
author = {Ergin, T. and Sezer, A. and Saha, L. and Majumdar, P. and Gök, F. and Ercan, E. N., E-mail: tulun.ergin@tubitak.gov.tr},
abstractNote = {G349.7+0.2 is a supernova remnant (SNR) expanding in a dense medium of molecular clouds and interacting with clumps of molecular material emitting gamma-rays. We analyzed the gamma-ray data of the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope and detected G349.7+0.2 in the energy range of 0.2–300 GeV with a significance of ∼13σ, showing no extended morphology. Modeling of the gamma-ray spectrum revealed that the GeV gamma-ray emission dominantly originates from the decay of neutral pions, where the protons follow a broken power-law distribution with a spectral break at ∼12 GeV. To search for features of radiative recombination continua in the eastern and western regions of the remnant, we analyzed the Suzaku data of G349.7+0.2 and found no evidence for overionized plasma. In this paper, we discuss possible scenarios to explain the hadronic gamma-ray emission in G349.7+0.2 and the mixed morphology nature of this SNR.},
doi = {10.1088/0004-637X/804/2/124},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 804,
place = {United States},
year = {2015},
month = {5}
}