The supernova remnant W44 and its surroundings
نویسندگان
چکیده
منابع مشابه
Spitzer observations of the N157B supernova remnant and its surroundings
Aims. We study the LMC interstellar medium in the field of the nebula N157B, which contains a supernova remnant, an OB association, ionized gas, and high-density dusty filaments in close proximity. We investigate the relative importance of shock excitation by the SNR and photo-ionization by the OB stars, as well as possible interactions between the supernova remnant and its environment. Methods...
متن کاملChandra Observations of a Non-Thermal Supernova Remnant Candidate AX J1843.8−0352 and its Surroundings
We present the Chandra results of AX J1843.8−0352, a supernova remnant (SNR) recently identified with ASCA. Chandra spatially resolved two components from this SNR: non-thermal and thermal ones. The morphology of the nonthermal component is clumpy and elliptical, elongated from the north to the south with a mean diameter of about 9. The spectrum is fitted with a power-law model of photon index ...
متن کاملGamma-ray emission from the shell of supernova remnant W44 revealed by the Fermi LAT.
Recent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close to ~10(15) electron volts. However, the nature of the particles that produce the emission remains ambiguous. We report observations of SNR W44 with the Fermi Large Area Telescope at energies between 2 x 10(8) electron volts and 3 x10(11) electron volts. The detection of a source with a morph...
متن کاملMechanism for spectral break in cosmic ray proton spectrum for emissions from supernova remnant W44
Recent observations of supernova remnant W44 by the Fermi spacecraft observatory support the idea that the bulk of galactic cosmic rays is accelerated in such remnants by a Fermi mechanism, also known as diffusive shock acceleration. However, the W44 expands into weakly ionized dense gas, and so a significant revision of the mechanism is required. Here, we provide the necessary modifications an...
متن کاملThe Supernova Remnant G11.2–0.3 and its central Pulsar
The plerion inside the composite Supernova Remnant G11.2–0.3 appears to be dominated by the magnetic field to an extent unprecedented among well known cases. We discuss its evolution as determined by a central pulsar and the interaction with the surrounding thermal remnant, which in turn interacts with the ambient medium. We find that a plausible scenario exists, where all the observations can ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Publications of the Astronomical Society of the Pacific
سال: 1976
ISSN: 0004-6280,1538-3873
DOI: 10.1086/130033