Black Eye Galaxy

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Black Eye Galaxy[1]
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Image taken by Hubble Space Telescope, March 14, 2020
Observation data (J2000 epoch)
ConstellationComa Berenices[2]
Right ascensionTemplate:RA[3]
DeclinationTemplate:DEC[3]
Redshift0.001361±0.000013[4]
Heliocentric radial velocity410[5]
Galactocentric velocity400±4[6]
DistanceTemplate:Cvt[5]
Group or clusterCVn I (M94 Group)[7]
Apparent magnitude (V)8.52[8]
Apparent magnitude (B)9.36[8]
Absolute magnitude (V)−21.07[9]Template:R/superscript
Characteristics
Type(R)SA(rs)ab,[4] HIISy2
Number of stars~100 billion
Size16.51 kiloparsecs (53,800 light-years)
(diameter, 25.0 mag/arcsec2 B-band isophote)[10]Template:R/superscript
Apparent size (V)10.71 × 5.128 arcminute[11]
Other designations
Sleeping Beauty Galaxy, Evil Eye Galaxy, M64, NGC 4826, PGC 44182, UGC 8062[11]

The Black Eye Galaxy (also called Sleeping Beauty Galaxy or Evil Eye Galaxy and designated Messier 64, M64, or NGC 4826) is a relatively isolated[7] spiral galaxy 17 million light-years away in the constellation of Coma Berenices. It was discovered by Edward Pigott in March 1779, and independently by Johann Elert Bode the following month, as well as by Charles Messier the next year. A dark band of absorbing dust partially in front of its bright nucleus gave rise to its nicknames of the "Black Eye", "Evil Eye", or "Sleeping Beauty" galaxy.[12]Template:R/superscript[13]Template:R/superscript M64 is well known among amateur astronomers due to its form in small telescopes and visibility across inhabited latitudes.

This galaxy is inclined 60° to the line-of-sight and has a position angle of 112°.[7] At the distance of this galaxy, it has a linear scale of Template:Cvt per arcsecond.[7] The morphological classification in the De Vaucouleurs system is (R)SA(rs)ab,[4] where the '(R)' indicates an outer ring-like structure, 'SA' denotes a non-barred spiral, '(rs)' means a transitional inner ring/spiral structure, and 'ab' says the spiral arms are fairly tightly wound.[14] Ann et al. (2015) gave it a class of SABa,[15] suggesting a weakly barred spiral galaxy with tightly wound arms.

M64 is a type 2 Seyfert galaxy[16] with an HII/LINER nucleus. The central region is a weak source of radio emission.[7] A soft X-ray source has been detected at the nucleus, which is most likely coming from the circumnuclear region rather than directly from an active galactic nucleus.[17] There is an inner disk of molecular gas that is truncated at a radius of Template:Cvt. At present, the non-rotational motions of this disk do not significantly feed the core, but the disk does produce a vigorous rate of star formation, with also approximately 100 billion stars inside the galaxy.[12] There is also evidence of a recent large inflow of mass.[18] The central supermassive black hole is calculated to have a mass of about 8.4×106 M☉.[9]

The interstellar medium of Messier 64 consists of two counter-rotating disks that are approximately equal in mass.[19] The inner disk contains the prominent dust lanes of the galaxy. The stellar population of the galaxy exhibits no measurable counter-rotation.[20] Possible formation scenarios include a merger with a gas-rich satellite galaxy in a retrograde orbit, or the continued accretion of gas clouds from the intergalactic medium.[19][20] It has a diameter of 16.51 kiloparsecs (53,800 light-years).[10]

Messier 64 is part of the Virgo Supercluster.[21]

File:M64 Blackeye Galaxy from the Mount Lemmon SkyCenter Schulman Telescope courtesy Adam Block.jpg
Wide field view (0.8m Schulman Telescope)

See also

References

  1. ^ Page Module:Citation/CS1/styles.css has no content.Tonry, J. L.; et al. (2001), "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances", Astrophysical Journal, 546 (2): 681–693, arXiv:astro-ph/0011223, Bibcode:2001ApJ...546..681T, doi:10.1086/318301, S2CID 17628238.
  2. ^ Page Module:Citation/CS1/styles.css has no content.Dreyer, J. L. E. (1988), Sinnott, R. W. (ed.), The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters, Sky Publishing Corporation/Cambridge University Press, ISBN 978-0-933346-51-2.
  3. ^ a b Page Module:Citation/CS1/styles.css has no content.Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
  4. ^ a b c Page Module:Citation/CS1/styles.css has no content.de Vaucouleurs, G.; et al. (1991), Third reference catalogue of bright galaxies, 9, New York: Springer-Verlag.
  5. ^ a b Page Module:Citation/CS1/styles.css has no content.Tully, R. Brent; et al. (August 2016), "Cosmicflows-3", The Astronomical Journal, 152 (2): 21, arXiv:1605.01765, Bibcode:2016AJ....152...50T, doi:10.3847/0004-6256/152/2/50, S2CID 250737862, 50.
  6. ^ Page Module:Citation/CS1/styles.css has no content."NASA/IPAC Extragalactic Database", Results for NGC 4826, retrieved 2018-12-13.
  7. ^ a b c d e Page Module:Citation/CS1/styles.css has no content.Israel, F. P. (January 2009), "CI and CO in nearby galaxy centers. The bright galaxies NGC 1068 (M 77), NGC 2146, NGC 3079, NGC 4826 (M 64), and NGC 7469", Astronomy and Astrophysics, 493 (2): 525–538, arXiv:0811.4058, Bibcode:2009A&A...493..525I, doi:10.1051/0004-6361:200810655, S2CID 15642005.
  8. ^ a b Page Module:Citation/CS1/styles.css has no content.Gil de Paz, Armando; et al. (2007), "The GALEX Ultraviolet Atlas of Nearby Galaxies", Astrophysical Journal Supplement Series, 173 (2): 185–255, arXiv:astro-ph/0606440, Bibcode:2007ApJS..173..185G, doi:10.1086/516636, S2CID 119085482.
  9. ^ a b Page Module:Citation/CS1/styles.css has no content.Gültekin, Kayhan; Gebhardt, Karl; Kormendy, John; Foord, Adi; Bender, Ralf; Lauer, Tod R.; Pinkney, Jason; Richstone, Douglas O.; Tremaine, Scott (2024). "The Black Hole Mass and Photometric Components of NGC 4826". The Astrophysical Journal. 974 (1): 16. arXiv:2409.11575. Bibcode:2024ApJ...974...16G. doi:10.3847/1538-4357/ad67dc.
  10. ^ a b Page Module:Citation/CS1/styles.css has no content."Your NED Search Results". ned.ipac.caltech.edu.
  11. ^ a b Page Module:Citation/CS1/styles.css has no content."M 64". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-12-13. {{cite web}}: Invalid |mode=Script error: No such module "Citation mode". (help)
  12. ^ a b Page Module:Citation/CS1/styles.css has no content."Messier 64 - M64 - Black Eye Galaxy (Spiral Galaxy) | freestarcharts.com". freestarcharts.com. Retrieved 2020-06-07.
  13. ^ Page Module:Citation/CS1/styles.css has no content.Rubin, Vera C. (January 1994). "Kinematics of NGC 4826: A sleeping beauty galaxy, not an evil eye". The Astronomical Journal. 107: 173. Bibcode:1994AJ....107..173R. doi:10.1086/116842. ISSN 0004-6256.
  14. ^ Page Module:Citation/CS1/styles.css has no content.de Vaucouleurs, Gérard (April 1963), "Revised Classification of 1500 Bright Galaxies", Astrophysical Journal Supplement, 8: 31, Bibcode:1963ApJS....8...31D, doi:10.1086/190084.
  15. ^ Page Module:Citation/CS1/styles.css has no content.Ann, H. B.; et al. (2015), "A Catalog of Visually Classified Galaxies in the Local (z ~ 0.01) Universe", The Astrophysical Journal Supplement Series, 217 (2): 27–49, arXiv:1502.03545, Bibcode:2015ApJS..217...27A, doi:10.1088/0067-0049/217/2/27, S2CID 119253507.
  16. ^ Page Module:Citation/CS1/styles.css has no content.Malkan, Matthew A.; et al. (September 2017), "Emission Line Properties of Seyfert Galaxies in the 12 μm Sample", The Astrophysical Journal, 846 (2): 26, arXiv:1708.08563, Bibcode:2017ApJ...846..102M, doi:10.3847/1538-4357/aa8302, S2CID 119243981, 102.
  17. ^ Page Module:Citation/CS1/styles.css has no content.Grier, C. J.; Mathur, S.; Ghosh, H.; Ferrarese, L. (April 2011), "Discovery of Nuclear X-ray Sources in Sings Galaxies", The Astrophysical Journal, 731 (1): 13, arXiv:1011.4295, Bibcode:2011ApJ...731...60G, doi:10.1088/0004-637X/731/1/60, S2CID 119216874, 60.
  18. ^ Page Module:Citation/CS1/styles.css has no content.García-Burillo, S.; et al. (August 2003), "Molecular Gas in NUclei of GAlaxies (NUGA). I. The counter-rotating LINER NGC 4826", Astronomy and Astrophysics, 407 (2): 485–502, arXiv:astro-ph/0306140, Bibcode:2003A&A...407..485G, doi:10.1051/0004-6361:20030866, S2CID 12970840.
  19. ^ a b Page Module:Citation/CS1/styles.css has no content.Brawn, R.; Walterbos, R. A. M.; Kennicutt, Robert C. Jr. (1992). "Counter-rotating gaseous disks in the "Evil Eye" galaxy NGC4826". Nature. 360 (6403): 442. Bibcode:1992Natur.360..442B. doi:10.1038/360442a0. S2CID 4337110.
  20. ^ a b Page Module:Citation/CS1/styles.css has no content.Rix, Hans-Walter R.; Kennicutt, Robert C. Jr.; Walterbos, Rene A. M. (1995). "Placid stars and excited gas in NGC 4826". Astrophysical Journal. 438: 155. Bibcode:1995ApJ...438..155R. doi:10.1086/175061.
  21. ^ Page Module:Citation/CS1/styles.css has no content.Tully, R. Brent (1988). Nearby galaxies catalog (1. publ ed.). Cambridge: Cambridge University Press. ISBN 978-0-521-35299-4.

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