Observation by David Strange: Discordant Redshifts in NGC4319 and Mark...

Uploaded by

David Strange

Observer

David Strange

Observed

2025 May 19 - 23:34

Uploaded

2025 May 20 - 23:13

Objects

NGC4319

Equipment

RC10
ASI533MC
L-Pro filter

Exposure

30 x 120s

Location

Salcombe Regis

Target name

NGC4319

Title

Discordant Redshifts in NGC4319 and Markarian 205

About this image

This image shows the quasar Markarian 205 embedded in the disc of the galaxy NGC4319. I last imaged this object in 1998, and that image was used by Halton Arp in his publication Catalogue of Discordant Redshift Associations. It showed a "bridge" of material linking the quasar and galaxy which was an impossibility since the quasar and galaxy showed discordant redshifts. This latest image with better optics deeper exposure and a more sensitive detector appears to show that the "bridge" is no longer apparent but was simply an imaging artifact.

Files associated with this observation

NGC4319_20250519_dgs3.jpg (1014.0 kB)

Like this image

Ian Jarrett, Manolo_Rodriguez, Tim Haymes, Dominic Ford, Steve Knight, Paul Whitmarsh, Matthew Terrell, Robin Leadbeater, Callum Potter, Alan Dowdell

Comments

Robin Leadbeater, 2025 May 24 - 21:48 UTC

Interestingly this has all just kicked off again on Cloudy Nights prompting a search for images new and old, many showing the "light bridge" (There may or may not be light but of course we now know it isn't a bridge)

David Strange

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