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MCG +8-11-11
The Seyfert 1 galaxy MCG +08-11-11 taken with DSS.
Observation data (J2000 epoch)
ConstellationAuriga
Right ascension05h 54m 53.60s
Declination+46° 26′ 21.73″
Redshift0.020457
Heliocentric radial velocity6,133 km/s
Distance401 Mly (123 Mpc)
Apparent magnitude (V)14.62
Apparent magnitude (B)15.27
Characteristics
TypeSB0, Sy1.5
Apparent size (V)2.1' x 1.5'
Notable featuresSeyfert galaxy
Other designations
UGC 3374, CGCG 232-003, PGC 18078, IRAS 05511+4625, 7C 0551+4625, TXS 0551+464

MCG +08-11-011 (MCG +8-11-11) known as UGC 3374, is a galaxy located in the constellation of Auriga. It is located 401 million light years from Earth and is classified as a Seyfert galaxy.[1]

Characteristics

MCG +8-11-11 is classified a type 1 Seyfert galaxy.[2][3][4] It is face-on spiral galaxy located at a projected distance of 123 megaparsecs. It has a soft X-ray luminosity originating from its nuclear core varying between 0.5 to 1 1044 erg s-1.[5] It is also one of the brightest active galactic nuclei (AGN) observed in X-ray bands but radio-quiet.[6][7] Through detected by most X-ray satellites, the galaxy wasn't one of the targets noticed by Chandra X-ray Observatory. It has an X-ray spectrum fitted by an estimated power law of Γ = 1.8 with an undetermined iron line likely originating from distant matter.[6] The galaxy has soft gamma-ray emission at 3.9 σ level, higher than 90 keV.[8]

Additionally, MCG +8-11-11 contains X-ray fluxes. Based on observations by the INTErnational Gamma-ray Astrophysics Observation (INTEGRAL), they have measurements of F20-100 keV = 8.46 x 10-11 erg cm-2 s-1 and F2-10 keV = 5.62 x 10-11 erg cm-2 s-1 respectively. Based from a spectral analysis conducted by NuSTAR, the galaxy has a bolometric luminosity estimated as Lbol = 14.2 x 1044 erg s-1. Furthermore, the black hole in MCG +8-11-11 has a mass of MBH = 7.19 ± 0.02 MΘ and an Eddington ratio of 7.54 x 10-1.[3] The thermal emission from its accretion disk is hot with a temperature of kT = 0.088+0.018-0.007 keV.[9]

Observations

MCG +8-11-11 has been observed in many occasions. In July 1995, its powerful gamma-ray flux was detected during a High Energy Astronomical Telescope balloon flight, suggesting its hard X-ray spectral feature was caused by a double-Compton backscattering exerted on its external cloud.[10] A Suzaku observation conducted in 2010 finds out the galaxy exhibits spectral signatures from its accretion disk.[11]

In November 2014, data from the observation by the 118 ks Chandra High Energy Transmission Gratings found MCG +8-11-11 shows lack of warm absorption and its Compton reflection signatures are described by out of direction material from the naked eye, based on an inclination angle of θ = 41+18-30 obtained by a MYTorus model.[9] Between 2019 and 2020, it was determined that MCG +8-11-11 has a host-corrected AGN luminosity of 5100 Ά of (4.21 ± 0.65) x 1043 erg s-1 and a large disk-size according to a photometric reverberation mapping conducted by the Wise Observatory.[12]

Radio source

MCG +8-11-11 hosts a triple radio source in its center with a projected size of 400 parsecs and an S-shaped morphology. However the central compartment of the source has a small diameter of 30 parsecs and is possibly confirmed as the active galaxy's core. The source is also found embedded in diffused emission with a major-axis position angle similar to its bar but offset by 50 degrees.[13]

References

  1. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-10-01.
  2. ^ Ward, J.; Wilson, A.S.; Disney, M.J.; Elvis, M.; Maccacaro, T. (1977). "MCG 8-11-11 - A Seyfert galaxy in an X-ray source error box". Astronomy and Astrophysics. 59 (2): L19–L21. Bibcode:1977A&A....59L..19W.
  3. ^ a b Tortosa, A.; Bianchi, S.; Marinucci, A.; Matt, G.; Middei, R.; Piconcelli, E.; Brenneman, L. W.; Cappi, M.; Dadina, M.; De Rosa, A.; Petrucci, P. O.; Ursini, F.; Walton, D. J. (2017-10-02). "NuSTAR spectral analysis of two bright Seyfert 1 galaxies: MCG +8-11-11 and NGC 6814". Monthly Notices of the Royal Astronomical Society. 473 (3): 3104–3112. arXiv:1709.07231. doi:10.1093/mnras/stx2457. ISSN 0035-8711.
  4. ^ Clavel, J.; Joly, M. (Feb 1984). "The 1200-3200 A spectra of Seyfert I galaxies - MK 304, NGC 7603, MCG 8-11-11, ESO 12-G 21, and NGC 1566". Astronomy and Astrophysics. 131 (1): 87–102. Bibcode:1984A&A...131...87C.
  5. ^ Perotti, F.; Bassani, L.; Bazzano, A.; Court, A.J. (November 1965). "MCG 8-11-11 - A powerful source of X- and gamma-rays". Astronomy and Astrophysics. 234 (1–2) (published Aug 1990): 106–108. Bibcode:1990A&A...234..106P. ISSN 0004-6361.
  6. ^ a b Matt, G.; Bianchi, S.; De Rosa, A.; Grandi, P.; Perola, G. C. (2005-12-16). "XMM-Newton observation of the bright Seyfert 1 galaxy, MCG+8-11-11" (PDF). Astronomy & Astrophysics. 445 (2): 451–456. doi:10.1051/0004-6361:20054013. ISSN 0004-6361.
  7. ^ Petrucci, P.-O.; Piétu, V.; Behar, E.; Clavel, M.; Bianchi, S.; Henri, G.; Barnier, S.; Chen, S.; Ferreira, J.; Malzac, J.; Belmont, R.; Corbel, S.; Coriat, M. (2023-10-01). "Simultaneous millimetric and X-ray intraday variability in the radio-quiet AGN MCG+08-11-11". Astronomy & Astrophysics. 678: L4. arXiv:2309.01804. Bibcode:2023A&A...678L...4P. doi:10.1051/0004-6361/202347495. ISSN 0004-6361.
  8. ^ Bassani, L.; Butler, R. C.; Dean, A. J.; Di Cocco, G.; Dipper, N. A.; Perotti, F.; Villa, G. (1981), "NGC 4151 and MCG 8-11-11: Two X-Ray Seyfert Galaxies with Strong Soft γ-Ray Emission", X-Ray Astronomy, Dordrecht: Springer Netherlands, pp. 107–112, doi:10.1007/978-94-010-9949-3_13, ISBN 978-94-010-9951-6, retrieved 2024-10-01
  9. ^ a b Murphy, K. D.; Nowak, M. A. (2014-11-19). "AChandra-HETG VIEW OF MCG +8-11-11". The Astrophysical Journal. 797 (1): 12. arXiv:1406.4497. Bibcode:2014ApJ...797...12M. doi:10.1088/0004-637x/797/1/12. ISSN 1538-4357.
  10. ^ Perotti, F.; Mattaini, E.; Quadrini, E.; Santambrogio, E.; Bassani, L.; Stephen, J. B. (1997-02-01). "Hard X-Ray Spectral Feature Detected in the Region of MCG 8-11-11". The Astrophysical Journal. 475 (2): L89–L92. Bibcode:1997ApJ...475L..89P. doi:10.1086/310479. ISSN 0004-637X.
  11. ^ Bianchi, S.; Angelis, I. De; Matt, G.; Parola, V. La; Rosa, A. De; Grandi, P.; Bailón, E. Jiménez; Piconcelli, E. (2010-11-01). "The broad-band X-ray spectrum of the Seyfert 1 galaxy, MCG+8-11-11". Astronomy & Astrophysics. 522: A64. arXiv:1007.1638. Bibcode:2010A&A...522A..64B. doi:10.1051/0004-6361/201015207. ISSN 0004-6361.
  12. ^ Fian, C.; Chelouche, D.; Kaspi, S.; Figaredo, C. Sobrino; Lewis, T.; Catalan, S. (2023-04-01). "Continuum reverberation mapping of MCG 08-11-011". Astronomy & Astrophysics. 672: A132. arXiv:2302.08402. Bibcode:2023A&A...672A.132F. doi:10.1051/0004-6361/202244905. ISSN 0004-6361.
  13. ^ Ulvestad, J. S.; Wilson, A. S. (1986-02-01). "The radio source in the very luminous gamma-ray Seyfert galaxy MCG 8-11-11". Monthly Notices of the Royal Astronomical Society. 218 (4): 711–719. doi:10.1093/mnras/218.4.711. ISSN 0035-8711.
source: https://en.wikipedia.org/wiki/MCG_%2B08-11-011