Markarian 471

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Markarian 471
SDSS image of Markarian 471.
Observation data (J2000 epoch)
ConstellationBoötes
Right ascension14h 22m 55.33s[1]
Declination+32° 51′ 02.43″[1]
Redshift0.034189[1]
Heliocentric radial velocity10,250 km/s ± 2[1]
Distance489 Mly
Apparent magnitude (V)14.42
Apparent magnitude (B)15.27
Characteristics
TypeSBa Sy1.8[1]
Size~169,000 ly (51.7 kpc) (estimated)[1]
Other designations
UGC 9214, CG 0411, CGCG 192-009, MCG +06-32-014, IRAS 14207+3304, PGC 51371, NSA 081577[1]

Markarian 471 also known as MRK 471, is a Type 1 Seyfert galaxy[2] located in the constellation of Boötes. The redshift of the galaxy is (z) 0.0341[1] and it was first discovered by Thomas F. Adams from a survey of Seyfert galaxies in January 1977.[3]

Description

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Markarian 471 is classified as a type SBa barred spiral galaxy or a theta-shaped spiral.[4][5][6] The circumnuclear region of the galaxy is found to have a dust obscured appearance with ultraviolet imaging showing a nucleus that is point-like and star forming blob regions that are scattered in all directions with many star clusters.[7]

There is also presence of several dust lanes along the direction of the galaxy's galactic bar, which in turn enters into the circumnuclear region of the galaxy. The spiral arms are suggested to curve in an inwards direction.[8] Dust structures within the stellar bar region are shown to connect together and subsequently going towards the center in a curve formation forming a type GD structure.[9] There is also a nuclear spiral region present with an approximate mass surface density of 16 Mʘ pc-2.[10]

A multi-wavelength study of the galaxy's spectrum, has found it is a Type 1.9 Seyfert galaxy with a narrow-line region that is extremely reddened. However, there are no signs of any board components that are classified as very variable.[11]

References

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  1. ^ a b c d e f g h "NED Search results for Markarian 471". NASA/IPAC Extragalactic Database. Retrieved 2025-12-21.
  2. ^ de Vaucouleurs, G.; de Vaucouleurs, A.; Corwin, J. R. (1976). "Second reference catalogue of bright galaxies". Second reference catalogue of bright galaxies. 1976: 0.
  3. ^ Adams, Thomas F. (January 1977). "A Survey of the Seyfert Galaxies Based on Large-Scale Image-Tube Plates". The Astrophysical Journal Supplement Series. 33: 19. doi:10.1086/190416. ISSN 0067-0049.
  4. ^ Martini, Paul; Pogge, Richard W. (December 1999). "Hubble Space Telescope Observations of the CFA Seyfert 2 Galaxies: The Fueling of Active Galactic Nuclei". The Astronomical Journal. 118 (6): 2646–2657. doi:10.1086/301140. ISSN 0004-6256.
  5. ^ McLeod, K. K.; Rieke, G. H. (March 1995). "Near-Infrared Imaging of CfA Seyfert Galaxies". The Astrophysical Journal. 441: 96. doi:10.1086/175339. ISSN 0004-637X.
  6. ^ Takase, B.; Miyauchi-Isobe, N. (1984). "Kiso survey for ultraviolet-excess galaxies. I." Annals of the Tokyo Astronomical Observatory. 19: 595–638. ISSN 0082-4704.
  7. ^ Muñoz Marín, VÍctor M.; González Delgado, Rosa M.; Schmitt, Henrique R.; Cid Fernandes, Roberto; Pérez, Enrique; Storchi-Bergmann, Thaisa; Heckman, Tim; Leitherer, Claus (August 2007). "An Atlas of the Circumnuclear Regions of 75 Seyfert Galaxies in the Near-Ultraviolet with the Hubble Space Telescope Advanced Camera for Surveys". The Astronomical Journal. 134 (2): 648–667. doi:10.1086/519448. ISSN 0004-6256.
  8. ^ Martini, Paul; Regan, Michael W.; Mulchaey, John S.; Pogge, Richard W. (June 2003). "Circumnuclear Dust in Nearby Active and Inactive Galaxies. I. Data". The Astrophysical Journal Supplement Series. 146 (2): 353–406. doi:10.1086/367817. ISSN 0067-0049.
  9. ^ Deo, R. P.; Crenshaw, D. M.; Kraemer, S. B. (July 2006). "The Host Galaxies of Narrow-Line Seyfert 1 Galaxies: Nuclear Dust Morphology and Starburst Rings". The Astronomical Journal. 132 (1): 321–346. doi:10.1086/504894. ISSN 0004-6256.
  10. ^ Martini, Paul; Pogge, Richard W. (December 1999). "Hubble Space Telescope Observations of the CFA Seyfert 2 Galaxies: The Fueling of Active Galactic Nuclei". The Astronomical Journal. 118 (6): 2646–2657. doi:10.1086/301140. ISSN 0004-6256.
  11. ^ Trippe, M. L.; Crenshaw, D. M.; Deo, R. P.; Dietrich, M.; Kraemer, S. B.; Rafter, S. E.; Turner, T. J. (December 2010). "A Multi-wavelength Study of the Nature of Type 1.8/1.9 Seyfert Galaxies". The Astrophysical Journal. 725 (2): 1749–1767. doi:10.1088/0004-637X/725/2/1749. ISSN 0004-637X.
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