Triple and multiple mergers

by Alpha_Aurigae

A couple of days ago I noticed Chris - the zookeeper - mentioning triple mergers are quite rare. That sounds like my cue to start a new discussion. Feel free to post and discuss mergers involving three or more galaxies.

This is the one that inspired me to start this thread:

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AGZ0001v46

Posted October 2, 2014 1:41 PM

by Alpha_Aurigae

Maybe?

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AGZ00031qi

Posted October 2, 2014 1:44 PM

by Alpha_Aurigae

Maybe?

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AGZ00060bb

Posted October 2, 2014 1:47 PM

by Alpha_Aurigae

This is a cluster but I don't see any interaction

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AGZ0004nqz

Posted October 2, 2014 1:51 PM

by Alpha_Aurigae

Possibly

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AGZ00033r0

Posted October 2, 2014 1:52 PM

by mlpeck in response to Alpha Aurigae's comment.

AGZ00033r0 is in Keel's (2013) catalog of overlaps.

It's a pity none of these have SDSS spectra. A few of them are in other redshift surveys though.

Posted October 2, 2014 3:18 PM

by mlpeck in response to Alpha Aurigae's comment.

The Quench project sample had a few multiply interacting systems. Here are a couple with spectroscopically confirmed neighbors:

AGS000000x = UGC 06361

UGC 06361

The program galaxy is the one SE of center in the finder chart image. The other whiteish one NW of center has no SDSS spectrum but it does have a redshift measurement.

AGS000007y happened fortunately to be in an area of overlapping plates, so all 4 of these objects have SDSS spectra:

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All of these have relative velocities within ±200 km/s of the mean and transverse separations of ∼5-11 kpc.

The program galaxy is the one in the center. The SDSS spectro pipeline calls it a QSO. The clump to the NE is a lower excitation AGN, and the other two are starforming.

Posted October 2, 2014 3:35 PM

by Alpha_Aurigae

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AGZ0006256

Posted October 2, 2014 3:38 PM

by Alpha_Aurigae

@ mlpeck : thanks for contributing 😃

Posted October 2, 2014 3:40 PM

by Alpha_Aurigae

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AGZ0001tjo

Posted October 2, 2014 6:53 PM

by Alpha_Aurigae

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AGZ00016yx

Posted October 2, 2014 6:54 PM

by Alpha_Aurigae

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AGZ0001h4b

Posted October 2, 2014 6:55 PM

by Alpha_Aurigae

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AGZ00023iv

Posted October 2, 2014 6:57 PM

by Alpha_Aurigae

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AGZ0002lql

Posted October 2, 2014 6:59 PM

by Alpha_Aurigae

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AGZ00064oy

Posted October 2, 2014 7:14 PM

by Alpha_Aurigae

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AGZ0005m7y

Posted October 2, 2014 7:17 PM

by Alpha_Aurigae

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AGZ0003kqc

Posted October 2, 2014 7:26 PM

by Alpha_Aurigae

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AGZ00048wi

Posted October 2, 2014 7:31 PM

by Alpha_Aurigae

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AGZ0004c5a

Posted October 2, 2014 7:36 PM

by Alpha_Aurigae

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AGZ00022xu

Posted October 2, 2014 7:38 PM

by Alpha_Aurigae

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e AGZ0003lpo

Posted October 2, 2014 8:54 PM

by Alpha_Aurigae

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AGZ0005puf

Posted October 2, 2014 10:27 PM

by Alpha_Aurigae

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AGZ0004o60

Posted October 2, 2014 10:33 PM

by Alpha_Aurigae

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AGZ0001vis

Posted October 2, 2014 10:37 PM

by Alpha_Aurigae

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AGZ00036fm

Posted October 2, 2014 10:39 PM

by Alpha_Aurigae

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AGZ0003irm

Posted October 2, 2014 10:41 PM

by Alpha_Aurigae

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AGZ00023rm

Posted October 2, 2014 10:43 PM

by Budgieye moderator

Blog: Galaxy Zoo Multi Mergers Dec 2010 http://blog.galaxyzoo.org/2010/12/22/galaxy-zoo-multi-mergers/ when 3 galaxies collide: a list for publication with 39 examples "We therefore compared these merger fractions and galaxy properties to a large and well-known simulation called the Millennium Run. This is a cosmic scale simulation of Dark Matter" "Simulation did rather well – it predicted the relative abundance of multi-mergers to within a few percent and it predicted that galaxies in these systems should have properties more like a typical elliptical rather than a typical spiral. "

Posted October 2, 2014 11:46 PM

by Alpha_Aurigae

Thanks, Budgieye 😃

Posted October 3, 2014 6:22 AM

by Alpha_Aurigae

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AGZ00015y3

Posted October 3, 2014 8:42 AM

by Alpha_Aurigae

Two or three galaxies?

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AGZ00033r2

Posted October 3, 2014 8:54 AM

by Alpha_Aurigae

Merger or overlap?

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AGZ0002yqk

Posted October 3, 2014 8:10 PM

by Alpha_Aurigae

Hard to tell how many galaxies are involved here:

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AGZ0000sdw

Posted October 3, 2014 8:11 PM

by Alpha_Aurigae

Merger of two or three galaxies?

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AGZ000162p

Posted October 3, 2014 8:11 PM

by Alpha_Aurigae

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AGZ00020gt

Posted October 3, 2014 8:13 PM

by Alpha_Aurigae

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AGZ0003rno

Posted October 3, 2014 8:18 PM

by Alpha_Aurigae

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AGZ000306f

Posted October 4, 2014 8:54 AM

by Alpha_Aurigae

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AGZ0005djw

Posted October 4, 2014 8:54 AM

by Alpha_Aurigae

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AGZ00022ve

Posted October 4, 2014 8:55 AM

by Alpha_Aurigae

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AGZ0004hoe

Posted October 4, 2014 8:56 AM

by Alpha_Aurigae

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AGZ0002b4l

Posted October 4, 2014 8:57 AM

by Alpha_Aurigae

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AGZ000366c

Posted October 4, 2014 8:57 AM

by Alpha_Aurigae

Great triple merger 😃

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AGZ0002kjo

Posted October 4, 2014 12:25 PM

by Alpha_Aurigae

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AGZ0001rcf

Posted October 4, 2014 12:26 PM

by Alpha_Aurigae

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AGZ0003ew1

Posted October 4, 2014 12:30 PM

by Alpha_Aurigae

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AGZ0001qr4

Posted October 4, 2014 12:31 PM

by Alpha_Aurigae

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AGZ0002l8a

Posted October 4, 2014 12:32 PM

by Alpha_Aurigae

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AGZ0004nr0

Posted October 4, 2014 12:33 PM

by Alpha_Aurigae

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AGZ0005w1c

Posted October 4, 2014 12:34 PM

by Alpha_Aurigae

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AGZ0005a4h

Posted October 4, 2014 12:35 PM

by Alpha_Aurigae

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AGZ0005l1t

Posted October 4, 2014 12:36 PM

by Alpha_Aurigae

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AGZ0002co6

Posted October 4, 2014 12:37 PM

by Alpha_Aurigae

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AGZ000245i

Posted October 4, 2014 12:39 PM

by Alpha_Aurigae

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AGZ0002kpe

Posted October 4, 2014 12:51 PM

by Alpha_Aurigae

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AGZ0004xs6

Posted October 4, 2014 1:33 PM

by Alpha_Aurigae

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AGZ0002mi1

Posted October 4, 2014 1:34 PM

by Alpha_Aurigae

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AGZ0004nr1

Posted October 4, 2014 3:23 PM

by Alpha_Aurigae

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AGZ0002baa

Posted October 4, 2014 10:37 PM

by Alpha_Aurigae

Two or three galaxies?

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AGZ000328b

Posted October 4, 2014 10:42 PM

by Alpha_Aurigae

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AGZ0005t4k

Posted October 5, 2014 8:19 AM

by Alpha_Aurigae

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AGZ0004ogy

Posted October 5, 2014 7:38 PM

by Alpha_Aurigae

Maybe, maybe not:

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AGZ0004q8e

Posted October 6, 2014 8:25 PM

by Alpha_Aurigae

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AGZ0002kcc

Posted October 9, 2014 12:45 PM

by Alpha_Aurigae

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AGZ00048wk

Posted October 21, 2014 1:28 PM

by Alpha_Aurigae

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AGZ00071j0

For a better view see the Skyserver image.

Posted October 23, 2014 8:21 PM

by Alpha_Aurigae

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Posted October 27, 2014 12:02 AM

by Alpha_Aurigae

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AGZ00053z3

Posted October 27, 2014 5:07 PM

by Alpha_Aurigae

Two or three galaxies?

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AGZ000268r

Posted October 29, 2014 8:04 PM

by Alpha_Aurigae

Two or three galaaxies merging?

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AGZ0001jxs

Posted November 2, 2014 12:22 PM

by Alpha_Aurigae

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AGZ0003kqa

Posted November 3, 2014 5:30 PM

by Alpha_Aurigae

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AGZ0002cco

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Posted November 4, 2014 5:28 PM

by Alpha_Aurigae

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AGZ0000wqh

Posted November 6, 2014 1:27 PM

by Alpha_Aurigae

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AGZ00031bq

Posted November 7, 2014 12:23 PM

by Alpha_Aurigae

Maybe there is a third galaxy involved in this merger, the small one at one o' clock

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AGZ0004tfq

Posted November 7, 2014 12:39 PM

by Alpha_Aurigae

Two or three galaxies?

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AGZ00064ox

Posted November 10, 2014 6:39 PM

by Alpha_Aurigae

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AGZ0004p2j

Posted November 10, 2014 6:40 PM

by Alpha_Aurigae

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AGZ00025jw

Posted November 17, 2014 8:43 AM

by Alpha_Aurigae

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AGZ0002bsw

Posted November 17, 2014 8:43 AM

by Alpha_Aurigae

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AGZ0004iyd

Posted November 17, 2014 8:44 AM

by Alpha_Aurigae

Multiple merger to the right

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AGZ0003ag8

Posted November 17, 2014 9:20 AM

by Alpha_Aurigae

Sad face 😦

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AGZ0007naq

Posted November 23, 2014 8:45 PM

by Alpha_Aurigae

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AGZ0006eci

Posted November 23, 2014 8:50 PM

by Alpha_Aurigae

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AGZ0002kjn

Posted November 27, 2014 1:00 AM

by Alpha_Aurigae

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AGZ0006al3

Posted November 27, 2014 9:32 PM

by Alpha_Aurigae

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AGZ0006qnd

Posted November 27, 2014 9:33 PM

by Alpha_Aurigae

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AGZ0006k9l

Posted November 27, 2014 9:33 PM

by Alpha_Aurigae

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AGZ0007nmi

Posted November 28, 2014 8:57 AM

by Alpha_Aurigae

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AGZ000725m

Posted November 29, 2014 4:16 PM

by Alpha_Aurigae

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AGZ0007epm

Posted November 29, 2014 4:40 PM

by Alpha_Aurigae

Cluster, maybe a merger, maybe not.

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AGZ0001ttv

Posted November 30, 2014 10:46 AM

by Alpha_Aurigae

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AGZ0006257

Posted November 30, 2014 12:39 PM

by Alpha_Aurigae

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AGZ0005d6g

Posted November 30, 2014 12:54 PM

by Alpha_Aurigae

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AGZ000285p

Posted November 30, 2014 11:11 PM

by Alpha_Aurigae

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AGZ0006ejp

Posted December 1, 2014 8:40 PM

by Alpha_Aurigae

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AGZ0007fb3

Posted December 23, 2014 9:44 PM

by Alpha_Aurigae

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AGZ0006jx0

Posted February 5, 2015 8:42 PM

by Alpha_Aurigae

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AGZ00065nn

Posted February 6, 2015 8:08 PM

by Alpha_Aurigae

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AGZ0006v08

Posted February 10, 2015 12:24 PM

by Alpha_Aurigae

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AGZ0004oyi

Posted February 12, 2015 12:08 AM

by Alpha_Aurigae

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AGZ0003kuy

Posted February 12, 2015 12:10 AM

by Alpha_Aurigae

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AGZ0004pc9

Posted February 12, 2015 12:14 AM

by Alpha_Aurigae

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AGZ0004mmk

Posted February 12, 2015 11:43 PM

by Alpha_Aurigae

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AGZ0001hki

Posted February 17, 2015 6:56 PM

by Alpha_Aurigae

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AGZ000574r

Posted February 19, 2015 10:48 AM

by Alpha_Aurigae

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AGZ0005or6

Posted February 19, 2015 10:49 AM

by Alpha_Aurigae

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AGZ0004685

Posted February 19, 2015 2:57 PM

by Alpha_Aurigae

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AGZ0005d6h

Posted February 20, 2015 4:50 PM

by Alpha_Aurigae

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AGZ000623v

Posted February 24, 2015 2:30 PM

by dj_tjitso

Could it be?

AGZ00016bm

Posted March 11, 2015 2:58 PM

by Alpha_Aurigae

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AGZ0003jxl

Posted March 21, 2015 1:26 AM

by Alpha_Aurigae

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AGZ0004hpa

Posted March 22, 2015 4:54 PM