Astronomy:Messier 105

From HandWiki
Short description: Elliptical galaxy in the constellation Leo
Messier 105
Messier105 - HST - Potw1901a.jpg
M105, as viewed by the HST;
Credit: NASA/ESA
Observation data (J2000 epoch)
ConstellationLeo
Right ascension 10h 47m 49.600s[1]
Declination+12° 34′ 53.87″[1]
Helio radial velocity908 km/s[2]
Distance36.6 Mly (11.22 Mpc)[2]
Group or clusterLeo I Group[3]
Apparent magnitude (V)9.3[4]
Characteristics
TypeE1[5]
Apparent size (V)5′.4 × 4′.8[6]
Other designations
M105, NGC 3379, PGC 32256, UGC 5902[7]

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.[lower-alpha 1][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 2×108 M☉.[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 1.8×109 M☉ 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]

See also

References and footnotes

  1. ↑ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S. 
  2. ↑ 2.0 2.1 2.2 Tully, R. Brent et al. (August 2016), "Cosmicflows-3", The Astronomical Journal 152 (2): 21, doi:10.3847/0004-6256/152/2/50, 50, Bibcode: 2016AJ....152...50T. 
  3. ↑ 3.0 3.1 Lee, Myung Gyoon; Jang, In Sung (May 2016). "Dual Stellar Halos in the Standard Elliptical Galaxy M105 and Formation of Massive Early-type Galaxies". The Astrophysical Journal 822 (2): 17. doi:10.3847/0004-637X/822/2/70. 70. Bibcode: 2016ApJ...822...70L. 
  4. ↑ "Messier 105". https://messier.seds.org/m/m105.html. 
  5. ↑ 5.0 5.1 Tian, Yong; Ko, Chung-Ming (October 2016), "Dynamics of elliptical galaxies with planetary nebulae in modified Newtonian dynamics", Monthly Notices of the Royal Astronomical Society 462 (1): 1092–1100, doi:10.1093/mnras/stw1697, Bibcode: 2016MNRAS.462.1092T 
  6. ↑ "NASA/IPAC Extragalactic Database". Results for M105. http://nedwww.ipac.caltech.edu/. 
  7. ↑ "M 105". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=M+105. 
  8. ↑ Garner, Rob (6 October 2017). "Messier 105". https://www.nasa.gov/feature/goddard/2017/messier-105. 
  9. ↑ 9.0 9.1 Jones, K. G. (1991). Messier's Nebulae and Star Clusters (2nd ed.). Cambridge University Press. ISBN 978-0-521-37079-0. 
  10. ↑ Statler, Thomas S. (July 1994), "The intrinsic shape of NGC 3379", The Astronomical Journal 108 (1): 111–127, doi:10.1086/117050, Bibcode: 1994AJ....108..111S 
  11. ↑ Shapiro, Kristen L. et al. (2006). "The black hole in NGC 3379: a comparison of gas and stellar dynamical mass measurements with HST and integral-field data". Monthly Notices of the Royal Astronomical Society 370 (2): 559–579. doi:10.1111/j.1365-2966.2006.10537.x. Bibcode: 2006MNRAS.370..559S. 
  12. ↑ Eracleous, Michael et al. (March 2010). "Spectral Energy Distributions of Weak Active Galactic Nuclei Associated with Low-Ionization Nuclear Emission Regions". The Astrophysical Journal Supplement 187 (1): 135–148. doi:10.1088/0067-0049/187/1/135. Bibcode: 2010ApJS..187..135E. 
  13. ↑ Ford, Alyson; Bregman, J. N. (2012). "Detection of Ongoing, Low-Level Star Formation in Nearby Ellipticals". American Astronomical Society 219: 102–03. Bibcode: 2012AAS...21910203F. 
  14. ↑ Thilker, David A. et al. (2009). "Massive star formation within the Leo 'primordial' ring". Nature 457 (7232): 990–993. doi:10.1038/nature07780. PMID 19225520. Bibcode: 2009Natur.457..990T. 
  15. ↑ Tully, R. B. (1988). Nearby Galaxies Catalog. Cambridge University Press. ISBN 978-0-521-35299-4. 
  16. ↑ Fouque, P. et al. (1992). "Groups of galaxies within 80 Mpc. II – The catalogue of groups and group members". Astronomy and Astrophysics Supplement 93: 211–233. Bibcode: 1992A&AS...93..211F. 
  17. ↑ Garcia, A. (1993). "General study of group membership. II – Determination of nearby groups". Astronomy and Astrophysics Supplement 100: 47–90. Bibcode: 1993A&AS..100...47G. 
  18. ↑ Giuricin, G. et al. (2000). "Nearby Optical Galaxies: Selection of the Sample and Identification of Groups". The Astrophysical Journal 543 (1): 178–194. doi:10.1086/317070. Bibcode: 2000ApJ...543..178G. 
  1. ↑ Object found: on 24 March

External links

Coordinates: Sky map 10h 47m 49.6s, +12° 34′ 54″



Retrieved from "https://handwiki.org/wiki/index.php?title=Astronomy:Messier_105&oldid=3354803"