Bibcode
DOI
Perez-Fournon, I.; Gonzalez-Serrano, J. I.; Colina, L.; Biermann, P. L.
Bibliographical reference
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 329, June 15, 1988, p. L81-L84.
Advertised on:
6
1988
Journal
Citations
35
Refereed citations
34
Description
CCD photometry of the M87 jet in the Thuan-Gunn r and g filters is
presented. Accurate elliptical models of the underlying stellar emission
were subtracted from the reduced and calibrated frames. The residual
images show a number of morphological features not clearly seen before
such as the faint extension at the end of the jet and faint red diffuse
emission parallel to the jet on its northern side. The optical spectrum
of the knots between the r and g bands is steeper than in the radio and,
in general, becomes steeper with distance from the nucleus. The
implications of this new result for particle acceleration mechanisms in
jets are briefly discussed. The nondetection of a counterjet at an
intensity level 300 times fainter than the jet places stronger
constraints to relativistic beaming models of M87.