An upper limit on the proper motion of optical filaments near the Cetus Arc (Loop 2)

Details An upper limit on the proper motion of optical filaments near the Cetus Arc (Loop 2) An upper limit on the proper motion of optical filaments near the Cetus Arc (Loop 2)

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.213..711j&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 213, April 1, 1985, p. 711-716.

Astronomy and Astrophysics

Astronomy

1

Filaments, Nebulae, Radio Sources (Astronomy), Supernovae, Astronomical Models, Cross Correlation, Explosions

Scientific paper

A cross-correlation method was used to investigate the proper motion of optical filaments outside the radio loop known as the Cetus Arc (Loop 2). No motion was detected to a 3 sigma upper limit of 0.15 arcsec/yr. If the filaments are the result of a supernova explosion at the center of the Cetus Arc, then the age is greater than 1.3 million yr, the optical radius is R=43-160 pc, the expansion velocity is less than 37 km/s, and the explosion energy is (0.1-35) x 10 to the 44th J. An alternative model, that the filaments are debris from a supernova explosion in Orion, predicts a proper motion of 0.01 arcsec/yr, and so is not ruled out by this measurement.

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