M32p

Multi tool use
M32p |
Observation data |
Group or cluster
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Local Group |
Characteristics |
Mass |
7010250000000000000♠2.5×1010 M☉
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See also: Galaxy, List of galaxies
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M32p is a hypothesized former galaxy that was incorporated into the Andromeda Galaxy. It was a sister galaxy to the Milky Way and Andromeda galaxies, previously the third largest galaxy in the Local Group, and was merged into the larger Andromeda Galaxy an estimated 2 billion years ago.[1] The merger is thought to have created the thick disc and contributed the majority of the halo stars of Andromeda and caused its burst of star formation at the time of the merger. The former galaxy may be associated with the Andromeda satellite galaxy Messier 32 (M32), which may be the remains of its dense core. M32's unusual characteristics of dense compactness and burst of star formation 2 billion years ago would be explained by this theory as a remnant of an earlier large galaxy, given its unlikeness to other similarly sized elliptical galaxies.[2]
It was described in 2018 by scientists at the University of Michigan. It is thought to have been 2.5×1010M☉ in size.[3]
See also
Sausage Galaxy, cause for the Milky Way's thick disc and many halo stars.
References
^ Mike Wall (23 July 2018). "The Milky Way Had a Big Sibling Long Ago — And Andromeda Ate It". Space.com..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}
^ "The Milky Way's long-lost sibling finally found". Science Daily. 23 July 2018.
^ d'Souza, Richard; Bell, Eric F (2018). "The Andromeda galaxy's most important merger about 2 billion years ago as M32's likely progenitor". Nature Astronomy. arXiv:1807.08819. doi:10.1038/s41550-018-0533-x.
Further reading
d'Souza, Richard; Bell, Eric F (2018). "The Andromeda galaxy's most important merger about 2 billion years ago as M32's likely progenitor". Nature Astronomy. arXiv:1807.08819. doi:10.1038/s41550-018-0533-x.
Hammer, F.; Yang, Y. B.; Wang, J. L.; Ibata, R.; Flores, H.; Puech, M. (April 2018). "A 2-3 billion year old major merger paradigm for the Andromeda galaxy and its outskirts". Monthly Notices of the Royal Astronomical Society. 475 (2): 2754–2767. arXiv:1801.04279. Bibcode:2018MNRAS.475.2754H. doi:10.1093/mnras/stx3343.
Andromeda Galaxy
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Location |
Andromeda Galaxy → Andromeda subgroup → Local Group → Local Sheet → Virgo Supercluster → Laniakea Supercluster → Observable universe → Universe Each → may be read as "within" or "part of".
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Satellite galaxies |
- M32
- M110
- NGC 185
- NGC 147
- Andromeda I
- Andromeda II
- Andromeda III
Andromeda IV*
- Andromeda V
- Andromeda VI
- Andromeda VII
- Andromeda VIII
- Andromeda IX
- Andromeda X
- Andromeda XI
- Andromeda XII
- Andromeda XIII
- Andromeda XIV
- Andromeda XV
- Andromeda XVI
- Andromeda XVII
- Andromeda XVIII
- Andromeda XIX
- Andromeda XX
- Andromeda XXI
- Andromeda XXII
- Andromeda XXIII
- Andromeda XXIV
- Andromeda XXV
- Andromeda XXVI
- Andromeda XXVII
- Andromeda XXVIII
- Andromeda XXIX
Triangulum Galaxy*
*It is uncertain whether it is a companion galaxy of the Andromeda Galaxy
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Catalogued stars |
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Other |
- Andromeda–Milky Way collision
- S Andromedae
- Mayall II
- M32p
- NGC 206
- 3XMM J004232.1+411314
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Category
Portal
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Constellation of Andromeda
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- List of stars in Andromeda
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Stars |
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Star clusters |
Association |
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Open |
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Globular |
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Nebulae |
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Galaxies |
Messier |
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NGC |
- 5
- 11
- 13
- 19
- 21
- 20
- 27
- 39
- 43
- 48
- 49
- 51
- 67
- 68
- 69
- 70
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- 72
- 74
- 76
- 79
- 80
- 81
- 83
- 85
- 86
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- 108
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- 149
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- 184
- 214
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- 228
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- 317
- 389
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- 477
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- 668
- 679
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- 705
- 708
- 709
- 710
- 712
- 714
- 717
- 732
- 753
- 759
- 891
- 1000
- 7640
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Other |
- 3C 66A
- 3C 66B
- Andromeda I
- Andromeda III
- Andromeda IV
- Andromeda V
- Andromeda VIII
- Andromeda IX
- Andromeda X
- Andromeda XI
- Andromeda XII
- Andromeda XXI
- Donatiello I
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Other |
Galaxy clusters |
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Supernovae |
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