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Messier 105 or M105, also known as NGC 3379, is an elliptical galaxy 36.6[2] million light-years away in the equatorial constellation of Leo. It is the biggest elliptical galaxy in the Messier catalogue that is not in the Virgo cluster.[8] It was discovered by Pierre Méchain in 1781, just a few days after he discovered the nearby galaxies Messier 95 and Messier 96.[a][9] This galaxy is one of a few not object-verified by Messier so omitted in the editions of his Catalogue of his era. It was appended when Helen S. Hogg found a letter by Méchain locating and describing this object which matched those aspects under its first-published name, NGC 3379.[9]
It has a morphological classification of E1,[5] indicating a standard elliptical galaxy with a flattening of 10%. The major axis is aligned along a position angle of 71°. Isophotes of the galaxy are near perfect ellipses, twisting no more than 5° out of alignment, with changes in ellipticity of no more than 0.06. There is no fine structure apparent in the isophotes, such as ripples.[10] Observation of giant stars in the halo indicate there are two general populations: a dominant metal-rich subpopulation and a weaker metal-poor group.[3]
Messier 105 is known to have a supermassive black hole at its core whose mass is estimated to be between 1.4×108 and 2×108M☉.[11] The galaxy has a weak active galactic nucleus of the LINER type with a spectral class of L2/T2, meaning no broad Hα line and intermediate emission line ratios between a LINER and a H II region.[12] The galaxy also contains a few young stars and stellar clusters, suggesting some elliptical galaxies still form new stars, but very slowly.[13]
This galaxy, along with its companion the barred lenticular galaxy NGC 3384, is surrounded by an enormous ring of neutral hydrogen with a radius of 200 kiloparsecs (650 kilolight-years) and a mass of 1.8×109M☉ where star formation has been detected.[14] Messier 105 is one of several galaxies within the M96 Group (also known as the Leo I Group), a group of galaxies in the constellation Leo, the other Messier objects of which are M95 and M96.[15][16][17][18]
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^"Messier 105". SEDS Messier Catalog. Retrieved 30 April 2022.
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^Garner, Rob (6 October 2017). "Messier 105". NASA. Retrieved 5 October 2021.
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Messier105 or M105, also known as NGC 3379, is an elliptical galaxy 36.6 million light-years away in the equatorial constellation of Leo. It is the biggest...
The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his Catalogue des Nébuleuses et des Amas...
M105 or M-105 may refer to: Messier105, an elliptical galaxy in the constellation Leo M105, a 1½ ton US Army trailer M-105 (Michigan highway), a former...
the night sky, close to the Messier objects M20 to M25 (except M24). It was discovered and catalogued by Charles Messier on June 5, 1764. This cluster...
Messier 19 or M19 (also designated NGC 6273) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier on June 5, 1764...
Messier 81 (or Bode's Galaxy) Messier 84 Messier 87 (or Virgo A) Messier 104 (or the Sombrero Galaxy) Messier105Messier 106 Mrk 421 Mrk 501 NGC 821 NGC 1023...
Barnaba Oriani on May 5, 1779, six days before Charles Messier discovered the same galaxy. Messier had observed it on the same night as Oriani but had mistaken...
constellation Leo. This group contains between 8 and 24 galaxies, including three Messier objects. It also contains the Leo Ring. The group is one of many groups...
of objects not to mistake for comets; Messier's list, including Messier 13, eventually became known as the Messier catalog. It is located at right ascension...
Messier 56 (also known as M56 or NGC 6779) is a globular cluster in the constellation Lyra. It was discovered by Charles Messier in 1779. It is angularly...
discovered on May 3, 1764, and was the first Messier object to be discovered by Charles Messier himself. Messier originally mistook the object for a nebula...
the majority of well-known black holes above 1 billion M☉ are shown. Messier galaxies with precisely known black holes are all included. New discoveries...
doi:10.1088/0004-6256/139/2/476, hdl:2152/34371, S2CID 120965440. "Messier 5". SEDS Messier Catalog. Archived from the original on 27 June 2023. Retrieved...
1088/0004-637X/742/1/51, S2CID 118649860. "Messier 70". SEDS Messier Catalog. Retrieved 30 April 2022. Adam, Len (2018), Imaging the Messier Objects Remotely from Your...
Messier 31". Astrophysical Journal. 69: 103–158. Bibcode:1929ApJ....69..103H. doi:10.1086/143167. Baade, Walter (1944). "The Resolution of Messier 32...
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