Mj. Kukula et al., UNUSUAL RADIO AND OPTICAL STRUCTURES IN THE SEYFERT-GALAXY MARKARIAN-6, Monthly Notices of the Royal Astronomical Society, 280(4), 1996, pp. 1283-1292
We present 6- and 18-cm MERLIN maps of the radio structure in the Seyf
ert galaxy Markarian 6, along with [O III] and V-band images and a lon
g-slit spectrum of this object. The 6-cm map combines high resolution
with high sensitivity, and reveals a collimated jet on a scale of simi
lar to 1 arcsec: one of the best examples of a radio jet yet seen in a
Seyfert nucleus and remarkably similar to the structure in Markarian
3. On larger scales the 18-cm map shows features suggestive of shells
or bubbles on either side of the radio jet. These are much larger than
known supernova remnants and appear to be unique to this object; we d
iscuss several possibilities for their origin. Our optical images show
an elongated extended narrow-line region (ENLR) structure with knots
and linear features, The ENLR is misaligned with the large-scale radio
axis, and we examine the relationship between these two emission regi
ons. Finally, we discuss the implications of the complex structures in
this object for current models of Seyfert nuclei.