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Coordinates: Sky map 11h 18m 55.9s, +13° 05′ 32″
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{{short description|Intermediate spiral galaxy in the constellation Leo}}
{{Galaxybox begin
{{Infobox galaxy
| name = [[Messier Catalogue|Messier]] 65
| name = [[Messier Catalogue|Messier]] 65
}}
{{Galaxybox image
| image = [[Image:Messier 65 through the years.jpg|250px]]
| image = [[Image:Messier 65 through the years.jpg|250px]]
| caption = M65 by [[Hubble Space Telescope|Hubble]].<ref>{{cite news|title=Messier 65 through the years|url=http://www.spacetelescope.org/images/potw1352a/|accessdate=3 January 2014|newspaper=ESA/Hubble Picture of the Week}}</ref>
| caption = Image taken by [[Hubble Space Telescope]], December 30, 2013.<ref>{{cite news|title=Messier 65 through the years|url=http://www.spacetelescope.org/images/potw1352a/|access-date=3 January 2014|newspaper=ESA/Hubble Picture of the Week}}</ref><br>Credit: [[ESA]]/[[Hubble Space Telescope|Hubble]] & [[NASA]]
| credit = [[ESA]]/[[Hubble Space Telescope|Hubble]] & [[NASA]]
}}
{{Galaxybox observe
| epoch = [[J2000]]
| epoch = [[J2000]]
| constell = [[Leo (constellation)|Leo]]
| constellation name = [[Leo (constellation)|Leo]]
| ra = {{RA|11|18|55.9}}<ref name="ned">{{cite web
| ra = {{RA|11|18|55.9}}<ref name="ned">{{cite web
| title=NASA/IPAC Extragalactic Database
| work=NASA/IPAC Extragalactic Database
| work=Results for
| title=NED results for object MESSIER 065
| url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=m65&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES
| url=http://ned.ipac.caltech.edu/cgi-bin/objsearch?objname=m65&extend=no&hconst=73&omegam=0.27&omegav=0.73&corr_z=1&out_csys=Equatorial&out_equinox=J2000.0&obj_sort=RA+or+Longitude&of=pre_text&zv_breaker=30000.0&list_limit=5&img_stamp=YES
| accessdate=2006-10-21}}</ref>
| access-date=2006-10-21}}</ref>
| dec = {{DEC|+13|05|32}}<ref name="ned" />
| dec = {{DEC|+13|05|32}}<ref name="ned" />
| appdim_v = 8.709 × 2.454 [[Minute of arc|moa]]<ref name="SIMBAD">{{cite web
| size_v = 8.709 × 2.454 [[Minute of arc|moa]]<ref name="SIMBAD">{{cite simbad
| title=M 65
| title=Centre de Données astronomiques de Strasbourg
⚫
| access-date=2008-07-09}}</ref>
| work=Results for M65
| appmag_v = 9.3<ref>{{cite web |url=http://messier.seds.org/m/m065.html |title=Messier 65 |access-date=25 April 2022 |website=SEDS Messier Catalog}}</ref>
⚫
| url=http://simbad.u-strasbg.fr/simbad/sim-id?Ident=M65
⚫
| type = SAB(rs)a,<ref name="ned" /> [[LINER]]<ref name="ned" />
⚫
| accessdate=2008-07-09}}</ref>
| appmag_v = 10.25<ref name="ned" />
| h_radial_v = {{val|807|3|u=km/s}}<ref name="ned" />
⚫
| z = {{val|0.002692|0.000010}}<ref name="ned" />
| distance = 41-42 [[Light-year|Mly]]
⚫
| gal_v = {{val|723|5|u=km/s}}<ref name="ned" />
}}
| dist_ly = {{convert|41-42|Mly|Mpc|2|lk=on|abbr=on}}
{{Galaxybox character
⚫
| g_type = SAB(rs)a,<ref name="ned" /> [[LINER]]<ref name="ned" />
}}
{{Galaxybox astrometry
| h_radial_v = 807
| hrv_err = 3<ref name="ned" />
| z = 0.002692
⚫
| z_err = 0.000010<ref name="ned" />
| gal_v = 723
⚫
| gv_err = 5<ref name="ned" />
| g_dist =
| dist_err =
}}
{{Galaxybox catalog
| names = [[New General Catalogue|NGC]] 3623,<ref name="ned" /> [[Uppsala General Catalogue|UGC]] 6328,<ref name="ned" /> [[Principal Galaxies Catalogue|PGC]] 34612<ref name="ned" />
| names = [[New General Catalogue|NGC]] 3623,<ref name="ned" /> [[Uppsala General Catalogue|UGC]] 6328,<ref name="ned" /> [[Principal Galaxies Catalogue|PGC]] 34612<ref name="ned" />
⚫
| references = [[SIMBAD]]: [http://simbad.u-strasbg.fr/simbad/sim-id?Ident=M65 Search M65]
}}
}}
{{Galaxybox reference
| Simbad = M65 Search M65
}}
{{Galaxybox end}}


'''Messier 65''' (also known as '''NGC 3623''') is an [[intermediate spiral galaxy]] about 35 million [[light-year]]s away in the [[constellation]] [[Leo (constellation)|Leo]]. In the Catalogue of Named Galaxies, it is called '''Triadozephyrius Leonis''', or the ''western one of the triad'', referring to the [[Leo Triplet]].<ref>{{cite web|last1=Bodifee|first1=Gerard|title=Catalogue of One Thousand Named Galaxies|url=http://www.bodifee.be/wp-content/uploads/2015/08/2_CMG.pdf|accessdate=21 May 2017}}</ref> It was discovered by [[Charles Messier]] in 1780. Along with [[Messier 66|M66]] and [[NGC 3628]], M65 forms the [[Leo Triplet]], a small [[group of galaxies]].
'''Messier 65''' (also known as '''NGC 3623''') is an [[intermediate spiral galaxy]] about 35 million [[light-year]]s away in the [[constellation]] [[Leo (constellation)|Leo]], within its highly [[celestial equator|equatorial]] southern half. It was discovered by [[Charles Messier]] in 1780. With [[Messier 66|M66]] and [[NGC 3628]], it forms the [[Leo Triplet]], a small close [[group of galaxies]].


==Discovery==
==Discovery==
M65 was discovered by Charles Messier and included in his [[Messier Objects]] list. However, [[William Henry Smyth]] accidentally attributed the discovery to [[Pierre Méchain]] in his popular 19th century astronomical work ''A Cycle of Celestial Objects'' (stating "They [M65 and M66] were pointed out by Méchain to Messier in 1780"). This error was in turn picked up by Kenneth Glyn Jones in ''Messier's Nebulae and Star Clusters''. This has since ramified into a number of other books by a variety of authors.
M65 was discovered by Charles Messier and included in his [[Messier Objects]] list. However, [[William Henry Smyth]] accidentally attributed the discovery to [[Pierre Méchain]] in his popular 19th-century astronomical work ''A Cycle of Celestial Objects'' (stating "They [M65 and M66] were pointed out by Méchain to Messier in 1780"). This error was in turn picked up by Kenneth Glyn Jones in ''Messier's Nebulae and Star Clusters''. This has since ramified into a number of other books by a variety of authors.


==Star formation==
==Star formation==
The galaxy is low in dust and gas, and there is little [[star formation]] in it, although there has been some relatively recently in the arms. The ratio of old stars to new stars is correspondingly quite high. In most wavelengths it is quite uninteresting, though there is a radio source visible in the [[NRAO VLA Sky Survey|NVSS]], offset from the core by about two arc-minutes. The identity of the source is uncertain, as it has not been identified visually, or formally studied in any published papers.<ref>http://coolcosmos.ipac.caltech.edu/cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/m65.html</ref>
The galaxy is low in dust and gas, and there is little [[star formation]] in it, although there has been some relatively recently in the arms. The ratio of old stars to new stars is correspondingly quite high. In most wavelengths it is quite uninteresting, though there is a radio source visible in the [[NRAO VLA Sky Survey|NVSS]], offset from the core by about two arc-minutes. The identity of the source is uncertain, as it has not been identified visually, or formally studied in any published papers.<ref>{{Cite web | url=http://coolcosmos.ipac.caltech.edu/cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/m65.html | title=Multiwavelength Messier 65 | access-date=2010-03-26 | archive-date=2010-06-21 | archive-url=https://web.archive.org/web/20100621012913/http://coolcosmos.ipac.caltech.edu/cosmic_classroom/multiwavelength_astronomy/multiwavelength_museum/m65.html | url-status=dead }}</ref>

[[Image:Anttlerstrio.jpg|thumb|left|The Leo Triplet, with M65 at the upper right, M66 at the lower right, and NGC 3628 at the upper left. Credit: Scott Anttila.]]


==Interaction with other galaxies==
==Interaction with other galaxies==
To the eye, M65's disk appears slightly warped, and its relatively recent burst of star formation is also suggestive of some external disturbance. Rots (1978) suggests that the two other galaxies in the Leo Triplet interacted with each other about 800 million years ago. Recent research by Zhiyu Duan suggests that M65 may also have interacted, though much less strongly. He also notes that M65 may have a central bar—it is difficult to tell because the galaxy is seen from an oblique angle—a feature which is suggestive of tidal disruption.<ref>
To the eye, M65's disk appears slightly warped, and its relatively recent burst of star formation is also suggestive of some external disturbance. Rots (1978) suggests that the two other galaxies in the Leo Triplet interacted with each other about 800 million years ago. Recent research by Zhiyu Duan suggests that M65 may also have interacted, though much less strongly. He also notes that M65 may have a central bar&mdash;it is difficult to tell because the galaxy is seen from an oblique angle&mdash;a feature which is suggestive of tidal disruption.<ref>
{{cite journal
{{cite journal
|author=Zhiyu Duan
|author=Zhiyu Duan
Line 62: Line 40:
|title=Multicolor Photometry and Stellar Population Synthesis Study of the Interacting Galaxies of the Leo Triplet
|title=Multicolor Photometry and Stellar Population Synthesis Study of the Interacting Galaxies of the Leo Triplet
|journal=[[Astronomical Journal]]
|journal=[[Astronomical Journal]]
|volume=132 |issue=4 |pages=1581
|volume=132 |issue=4 |pages=1581–1592
|bibcode=2006AJ....132.1581D
|bibcode=2006AJ....132.1581D
|doi=10.1086/507304
|doi=10.1086/507304
|doi-access=free
}}</ref>
}}</ref>
⚫
{{commons category}}

==Gallery==
<gallery heights=180 widths=180>
Messier65 - SDSS DR14.jpg|Messier 65 by the [[Sloan Digital Sky Survey]]
Messier 65 Hubble WikiSky.jpg|[[Hubble Space Telescope|HST]] image of M65
NGC3623-hst-R814GB450.jpg|M65 by [[Hubble Space Telescope]]
M65 Galaxy from the Mount Lemmon SkyCenter Schulman Telescope courtesy Adam Block.jpg|M65 as imaged from the [[Mount Lemmon Observatory]]
Messier 065 2MASS.jpg|Messier 65 by [[2MASS]]
</gallery>

==See also==
* [[List of Messier objects]]


==References==
==References==
Line 72: Line 62:


==External links==
==External links==
⚫
{{commons category}}
* [http://messier.seds.org/m/m065.html SEDS Messier: Spiral Galaxy M65]
* [http://messier.seds.org/m/m065.html SEDS Messier: Spiral Galaxy M65]
* {{WikiSky}}
* {{WikiSky}}
* {{cite web|title=M65 – Spiral Galaxy|url=http://www.deepskyvideos.com/videos/messier/M65.html|work=Deep Sky Videos|publisher=[[Brady Haran]]|author=Szymanek, Nik|authorlink=Nik Szymanek|author2=Gray, Meghan}}
* {{cite web|title=M65 – Spiral Galaxy|url=http://www.deepskyvideos.com/videos/messier/M65.html|work=Deep Sky Videos|publisher=[[Brady Haran]]|author=Szymanek, Nik|author-link=Nik Szymanek|author2=Gray, Meghan}}


{{Portal bar|Astronomy|Stars|Outer space}}
{{Messier objects}}
{{Messier objects}}
{{Ngc40}}
{{Sky|11|18|55.9|+|13|05|32|35000000}}
{{Sky|11|18|55.9|+|13|05|32|35000000}}


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[[Category:Principal Galaxies Catalogue objects|34612]]
[[Category:Principal Galaxies Catalogue objects|34612]]
[[Category:Astronomical objects discovered in 1780]]
[[Category:Astronomical objects discovered in 1780]]
[[Category:Discoveries by Charles Messier]]

Latest revision as of 06:59, 30 December 2023

Messier 65
Image taken by Hubble Space Telescope, December 30, 2013.[1]
Credit: ESA/Hubble & NASA
Observation data (J2000 epoch)
ConstellationLeo
Right ascension11h 18m 55.9s[2]
Declination+13° 05′ 32″[2]
Redshift0.002692±0.000010[2]
Heliocentric radial velocity807±3 km/s[2]
Galactocentric velocity723±5 km/s[2]
Distance41–42 Mly (12.57–12.88 Mpc)
Apparent magnitude (V)9.3[3]
Characteristics
TypeSAB(rs)a,[2] LINER[2]
Apparent size (V)8.709 × 2.454 moa[4]
Other designations
NGC 3623,[2] UGC 6328,[2] PGC 34612[2]
References: SIMBAD: Search M65

Messier 65 (also known as NGC 3623) is an intermediate spiral galaxy about 35 million light-years away in the constellation Leo, within its highly equatorial southern half. It was discovered by Charles Messier in 1780. With M66 and NGC 3628, it forms the Leo Triplet, a small close group of galaxies.

Discovery

[edit]

M65 was discovered by Charles Messier and included in his Messier Objects list. However, William Henry Smyth accidentally attributed the discovery to Pierre Méchain in his popular 19th-century astronomical work A Cycle of Celestial Objects (stating "They [M65 and M66] were pointed out by Méchain to Messier in 1780"). This error was in turn picked up by Kenneth Glyn Jones in Messier's Nebulae and Star Clusters. This has since ramified into a number of other books by a variety of authors.

Star formation

[edit]

The galaxy is low in dust and gas, and there is little star formation in it, although there has been some relatively recently in the arms. The ratio of old stars to new stars is correspondingly quite high. In most wavelengths it is quite uninteresting, though there is a radio source visible in the NVSS, offset from the core by about two arc-minutes. The identity of the source is uncertain, as it has not been identified visually, or formally studied in any published papers.[5]

Interaction with other galaxies

[edit]

To the eye, M65's disk appears slightly warped, and its relatively recent burst of star formation is also suggestive of some external disturbance. Rots (1978) suggests that the two other galaxies in the Leo Triplet interacted with each other about 800 million years ago. Recent research by Zhiyu Duan suggests that M65 may also have interacted, though much less strongly. He also notes that M65 may have a central bar—it is difficult to tell because the galaxy is seen from an oblique angle—a feature which is suggestive of tidal disruption.[6]

[edit]

See also

[edit]

References

[edit]
  1. ^ "Messier 65 through the years". ESA/Hubble Picture of the Week. Retrieved 3 January 2014.
  2. ^ a b c d e f g h i j "NED results for object MESSIER 065". NASA/IPAC Extragalactic Database. Retrieved 2006-10-21.
  3. ^ "Messier 65". SEDS Messier Catalog. Retrieved 25 April 2022.
  4. ^ "M 65". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2008-07-09.
  5. ^ "Multiwavelength Messier 65". Archived from the original on 2010-06-21. Retrieved 2010-03-26.
  6. ^ Zhiyu Duan (2006). "Multicolor Photometry and Stellar Population Synthesis Study of the Interacting Galaxies of the Leo Triplet". Astronomical Journal. 132 (4): 1581–1592. Bibcode:2006AJ....132.1581D. doi:10.1086/507304.
[edit]
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