astro.wikisort.org - Galaxy

Search / Calendar

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.

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]
Helio 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

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.


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 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


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 barit is difficult to tell because the galaxy is seen from an oblique anglea feature which is suggestive of tidal disruption.[6]




See also



References


  1. "Messier 65 through the years". ESA/Hubble Picture of the Week. Retrieved 3 January 2014.
  2. "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".
  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.



На других языках


[de] Messier 65

Messier 65 (auch als NGC 3623 bezeichnet) ist eine 9,2 mag helle Spiralgalaxie vom Hubble-Typ Sb mit einer Flächenausdehnung von 9,8′ × 2,9′ im Sternbild Löwe. Zusammen mit Messier 66 und NGC 3628 bildet diese Galaxie das Leo-Triplett, den Kern der M66-Galaxiengruppe, welche sich in etwa 32 Millionen Lichtjahren (9,9 Mpc) Entfernung befindet. Halton Arp gliederte seinen Katalog ungewöhnlicher Galaxien nach rein morphologischen Kriterien in Gruppen. Dieses Galaxientriplett gehört zu der Klasse Gruppen von Galaxien.
- [en] Messier 65

[es] Galaxia espiral M65

Messier 65 (también conocido como NGC 3623) es una galaxia espiral intermedia a unos 35 millones años luz desde la constelación Leo. Fue descubierta por Charles Messier en 1780. El M65, M66, y NGC 3628 forman el famoso Triplete de Leo, un pequeño grupo de galaxias.

[ru] M 65 (галактика)

M 65 (Messier 65, Мессье 65, другие обозначения — NGC 3623, IRAS11163+1322, UGC 6328, ZWG 67.54, MCG 2-29-18, VV 308, ARP 317, PGC 34612) — галактика в созвездии Лев.



Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии