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Abell 2626 and friends: large and small scale structure

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arxiv 2106.08806 v1 pith:5MFJ3S7D submitted 2021-06-16 astro-ph.GA

classification astro-ph.GA
keywords a2626galaxya2637associatedfourpreviouslysubstructuresa2625
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abstract

New MMT/Hectospec spectroscopy centered on the galaxy cluster A2626 and covering a ${\sim} 1.8\,\text{deg}^2$ area out to $z \sim 0.46$ more than doubles the number of galaxy redshifts in this region. The spectra confirm four clusters previously identified photometrically. A2625, which was previously thought to be a close neighbor of A2626, is in fact much more distant. The new data show six substructures associated with A2626 and five more associated with A2637. There is also a highly collimated collection of galaxies and galaxy groups between A2626 and A2637 having at least three and probably four substructures. At larger scales, the A2626--A2637 complex is not connected to the Pegasus--Perseus filament.

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  1. SYMPHANY- SYnergy of Molecular PHase And Neutral hYdrogen in galaxies in A2626

    astro-ph.GA 2025-05 conditional novelty 6.0 of 10

    Multi-phase gas observations in A2626 show HI is more extended and stripped than CO, yet molecular gas also shows asymmetries and deficiencies, indicating environment affects both gas phases in a relaxed cool-core cluster.

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