The North Polar Spur: Remnant of a supernova explosion

Details The North Polar Spur: Remnant of a supernova explosion The North Polar Spur: Remnant of a supernova explosion

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978tust.nasa...54k&link_type=abstract

In its Transl. on USSR SCi. and Technol. (JPRS-71181) p 54-58 (SEE N78-24033 14-99) Transl. into ENGLISH from Priroda (Moscow),

Astronomy and Astrophysics

Astronomy

Galactic Radio Waves, Radio Astronomy, Radio Sources (Astronomy), Supernova Remnants, X Ray Astronomy, Astronomical Spectroscopy, Galactic Nuclei, Interstellar Gas, Kinetic Energy, Polarized Light, Stellar Mass Ejection

Scientific paper

X-ray observations indicate that the North Polar Spur (NPS) is the remnant of the explosion of some object. It is premature, however, to affirm with confidence that the explosion of a supernova led to its formation. The problem is that only the angular dimensions of the spur have been measured directly. In order to determine the fundamental characteristics of the explosion, such as the initial energy of the ejected gas, the actual distance to the North Polar Spur must be known. Estimates of this distance, based on the polarization of the light of stars resulting from its scattering by interstellar dusts, may be erroneous if there is another area lying closer on the same line of sight where polarization of the starlight also takes place. Estimates of the distance, based on the absorption of X-rays in the interstellar gas, are larger than those determined by optical observations. If the distance to the NPS is larger, then the spur must be located in the central part of the galaxy, and its diameter may be as large as 10,000 parsecs. Only the explosion of a galactic nucleus could lead to the production of such a large object.

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