Leo Triplet with full tidal tail (James E.)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: IC 2704 · IC 2708 · IC 2745 · IC 2752 · IC 2754 · IC 2761 · IC 2762 · IC 2765 · IC 2769 · IC 2782 · IC 2787 · IC 2799 · Leo Triplet · M 65 · M 66 · NGC 3623 · NGC 3627 · NGC 3628

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Leo Triplet with full tidal tail

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Leo Triplet with full tidal tail

The Leo Triplet is an interacting group of spiral galaxies located about 35 million light years away. The edge-on NGC 3628 (also known as the Hamburger Galaxy) is transected by a broad band of dust. It is considered a starburst galaxy and known to contain two populations of stars rotating in opposite directions. NGC 3628 seems most affected by the group's interaction with a tidal tail spanning some 300,000 light years long. The deformed spiral arms of M66 are experiencing a high rate of star formation activity. While M65 appears a bit warped with evidence of relatively recent active star forming activity, it seems to have been the least affected by the group's interaction.

Upon researching the tidal tail, I found a paper "Discovery of a Tidal Dwarf Galaxy in the Leo Triplet" by B. Nikiel-Wroczynski, et al. written in April 2018. It reports the clump at the end of the tidal tail (just above IC 2787 in my image) is actually a tidal dwarf galaxy that rotates independently of NGC 3628's tidal tail with a very high neutral gas content. At a distance of around 140 kpc from its parent galaxy, it would be one of the most detached objects of its type.

-- Minimal noise reduction to maintain tidal tail definition
-- See Revision B for an inverted view

Imaged over several nights: Feb 1, 6, 8, 10-11, 2022

Final
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B

Description: Inverted view

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Status	Advanced success
Started	...
Astrometry.net job	5565205
PixInsight job	CKHB54E9862KUS0PAWKXEK3VW41F4OWO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h21m21s.75
RA (top/left)	11h24m52s.70
RA (top/right)	11h17m51s.29
RA (bottom/right)	11h17m52s.43
RA (bottom/left)	11h24m51s.14

Dec (center)	+13°19′21″.7
Dec (top/left)	+14°16′44″.1
Dec (top/right)	+14°16′50″.5
Dec (bottom/right)	+12°21′44″.8
Dec (bottom/left)	+12°21′27″.4

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Leo Triplet with full tidal tail

Leo Triplet with full tidal tail

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Leo Triplet with full tidal tail

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