Markarian 348 (NGC 262) - Optical/Radio Composite

Composite optical-HI image of Markarian 348, a Type 2 Seyfert Galaxy. The cold, neutral hydrogen is shown in blue; the stars in the galaxy and the surrounding field are shown in red. The gas distribution spans a diameter of roughly 290 kpc, assuming a distance of 95 Mpc for Mkn 348, and is one of the largest such structures known. The fuzzy, red blob to the right of the main optical galaxy but embedded in the central, blue HI gas has the same redshift as Mkn 348 and is thought to be tidally disrupting the main galaxy. This tidal disruption may be responsible for the excess energy in the galaxy's Seyfert nucleus.

Optical data was obtained from four deep Palomar Schmidt images (90-minute exposures) taken with broadband filters centered at approximately 4800 A and 6500 A. The HI 21-cm emission line radio data was taken at the VLA using 25 antennas for 6 hours in the C-configuration and for 4 hours in the D-configuration. Sum of 13 velocity channels (4604 to 4476 km/s)

Legacy Astronomical Images

NRAO/AUI/NSF does not hold full copyright for this image. Contact the archivist for details.

Legacy Astronomical Image

NGC262

S.M. Simkin, J.H. van Gorkom, H.J. Su

Very Large Array (VLA)

1984-08-16

spectral line

21 cm

1420.4 MHz

HI

RA 0:48:47.144, Dec: 31:57:25.096

0.500000 x 0.500000 degrees

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Active Galactic Nuclei Series

Seyferts Unit