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

Journal Article · Sun May 10 00:00:00 EDT 2015 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/804/2/124· OSTI ID:22522441

Ergin, T.; Sezer, A. ^[1]; Saha, L.; Majumdar, P. ^[2]; Gök, F. ^[3]

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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)

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.

• OSTI ID: 22522441
• Journal Information: Astrophysical Journal, Vol. 804, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

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