X-rays from G74.9 + 1.2 - an elderly Crab Nebula

Details X-rays from G74.9 + 1.2 - an elderly Crab Nebula X-rays from G74.9 + 1.2 - an elderly Crab Nebula

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241l..19w&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 241, Oct. 1, 1980, p. L19-L22.

Astronomy and Astrophysics

Astrophysics

31

Crab Nebula, Pulsars, Supernova Remnants, X Ray Sources, Bremsstrahlung, Stellar Luminosity, Stellar Magnetic Fields

Scientific paper

The supernova remnant G74.9 + 1.2, which resembles the Crab Nebula in many of its radio properties, has been detected in 0.15-3 keV X-rays with the Imaging Proportional Counter on the Einstein Observatory. The intrinsic luminosity of the object is about 100 times weaker than the Crab Nebula in this band. The X-ray morphology is centrally brightened (not a shell) with a total extent about 5 arcmin (17 pc). The nearby, intense, compact radio source 2013 + 370 is also probably detected as an extended X-ray source. It is argued that G74.9 + 1.2 represents an object similar to the Crab Nebula but of age 4000-7000 years. If this is the case, the period of the pulsar or neutron star (whose loss of rotational energy fuels the nebula) is predicted to be 0.1-0.2 s.

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