Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...249...43h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 249, no. 1, Sept. 1991, p. 43-56.
Astronomy and Astrophysics
Astrophysics
40
Galactic Nuclei, Radio Emission, Seyfert Galaxies, Spiral Galaxies, Virgo Galactic Cluster, Bubbles, Galactic Structure, Very Large Array (Vla)
Scientific paper
Detailed, multifrequency VLA observations at 1.49 and 4.86 GHz are presented of the edge-on spiral galaxies NGC 4388 and NGC 4438. Both are members of the Virgo cluster of galaxies and have linear elongated radio features emerging from the nucleus and which are perpendicular to the plane of the galaxy. From these observations identification is reported of the nucleus of NGC 4388 which has been reported recently to have a hidden Seyfert 1 nucleus. The larger-scale structure of NGC 4388 consists of an elongated collimated structure to the south and a diffuse extended bubble to the north. The ridge of the radio emission is bent, possibly by density gradients perpendicular to the plane of the galaxy. A nuclear source in NGC 4438 cannot be identified unambiguously. The observations show a shell-like structure near the nucleus with a significant enhancement of the radio emission near the center of the shell.
Hummel Evi
Saikia D. J.
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