NGC 4651 - Galaxy with Faint Optical Jet. (astroeyes)

NGC 4651 - Galaxy with Faint Optical Jet.

Here is the galaxy NGC 4651 in Coma, which was featured on APOD a few days ago. The APOD write up made a great deal of the interaction between a dwarf galaxy and NGC 4651 and attributed the very faint optical jet, which is barely, if at all, visible in my image, to this interaction. It said nothing about the close presence of a very radio-loud quasar 3C 275.1 which can be seen in my image. (redshift z = 0.557). There is also some evidence of further disruption visible to the W of the galaxy. There are two faint dwarf galaxies which are possibly interacting with the main system. In the cropped image I have labeled the quasar and the very faint optical jet but cannot locate the 2 dwarf galaxies with certainty. H. Arp's publication 'X-ray observations of five galaxy-quasar associations', Astronomy and Astrophysics 316, 57-78 (1996) discusses this system in great detail. The story starts in 1971 when Burbidge, et al. (1971) identified some very high-probability associations between 3C quasars and bright, NGC galaxies. One of them was 3C 275.1 and NGC 4651. The z = 0.557 quasar fell near the optical jet galaxy NGC 4156 with an estimated probability of about 3 × 10-3. When ROSAT X-ray observations were obtained, it surprisingly turned out that there was an inner X-ray jet extending out of the galaxy toward the quasar (Arp 1996).

I include the X-Ray image from Arp's paper, which indeed does seem to show a jet pointing towards the quasar.

My image, taken during very murky (volcanic ash?) skies a week or so ago, consists of 50 x 120sec exposures. NGC 4651 is classified as a Galaxy with Narrow Filaments, 10.6m, 4' x 2.6', type SA(rs)c, distance 15.3 Mpc (50 Mly), diameter ~59 kly. 10" reflector and SX H9C camera, acquired using AstroArt3 and processed also using AA3, PixInsight and NEAT.

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NGC 4651 - Galaxy with Faint Optical Jet.

NGC 4651 - Galaxy with Faint Optical Jet.

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NGC 4651 - Galaxy with Faint Optical Jet.

NGC 4651 - Galaxy with Faint Optical Jet.

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