NGC 4869

NGC 4869
The elliptical galaxy NGC 4869.
Observation data (J2000 epoch)
ConstellationComa Berenices
Right ascension12h 59m 23.36s
Declination27° 54′ 41.78″
Redshift0.022820
Heliocentric radial velocity6,841 km/s
Distance343 Mly (105.16 Mpc)
Group or clusterComa Cluster
Apparent magnitude (V)13.52
Apparent magnitude (B)14.9
Characteristics
TypeE3, PAS
Size37.62 kiloparsecs (122,700 light-years)
(diameter; 2MASS K-band total isophote)[1]
Notable featuresRadio galaxy
Other designations
MCG +05-31-065, CGCG 160-225, PGC 44587, B2 1256+58, 5C 04.081, TXS 1257+281, 7C 1256+2810, KUG 1256+375, ABELL 1656:[D80] 105

NGC 4869 is an elliptical galaxy located in the constellation of Coma Berenices. It is located 343 million light years from Earth.[1] The galaxy was discovered by William Herschel in April 1785 but also observed by both John Herschel and Heinrich d'Arrest, in March 1827 and May 1863 respectively.[2] It is a member of the Coma Cluster[1][3] with a small companion galaxy at a position angle of 325°.[4]

Characteristics

NGC 4869 is classified as a radio galaxy with a faint radio core with two oppositely directed radio jets and a lengthy low-surface brightness tail.[5] It has an estimated γ-ray luminosity of Lγ ≤ 4 x 1039 erg s-1 like NGC 4874.[6] There is also an elongated absorption feature in the galaxy, possibly representing an edge on disk.[3]

NGC 4869 contains a narrow angle tailed radio source.[7][8] The source is found lying towards the central region of the Coma Cluster by 111 kpc.[5] It shows a mean fractional polarization of 18% at 4.535 GHz and 21% at 8.465 GHz[7] and a large-scale structure that is almost 200 kpc.[5] A characteristic feature of the source, is a sharp bend towards a north direction at 3’5 from the host galaxy's position.[5]

According to a Chandra X-ray image of NGC 4869, a straight collimated jet is seen flaring when traversing a surface brightness edge.[5]

Supermassive black hole

The supermassive black hole in NGC 4869 is estimated to be 1.32 x 108 Mʘ (108.12 Mʘ) based on a study made by Jong-Hak Woo and Urry in 2002.[9]

References

  1. ^ a b c "By Name NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2024-10-13.
  2. ^ "New General Catalog Objects: NGC 4850 - 4899". cseligman.com. Retrieved 2024-10-13.
  3. ^ a b Capetti, A.; de Ruiter, H.R.; Fanti, R.; Morganti, R.; Parma, P.; Ulrich, M.-H. (2000). "The HST snapshot survey of the B2 sample of low luminosity radio-galaxies: a picture gallery". Astronomy & Astrophysics. 362: 871–885. arXiv:astro-ph/0009056. Bibcode:2000A&A...362..871C.
  4. ^ de Juan, L.; Colina, L.; Perez-Fournon, I. (1994). "Surface photometry of low-luminosity radio galaxies". Astronomical Journal Supplement Series. 91 (2): 507–551. Bibcode:1994ApJS...91..507D. doi:10.1086/191947.
  5. ^ a b c d e Lal, Dharam V. (2020-09-11). "NGC 4869 in the Coma Cluster: Twist, Wrap, Overlap, and Bend". The Astronomical Journal. 160 (4): 161. arXiv:2009.07146. Bibcode:2020AJ....160..161L. doi:10.3847/1538-3881/abacd1. ISSN 0004-6256.
  6. ^ Baghmanyan, Vardan; Zargaryan, Davit; Aharonian, Felix; Yang, Ruizhi; Casanova, Sabrina; Mackey, Jonathan (2022-08-13). "Detailed study of extended γ-ray morphology in the vicinity of the Coma cluster with Fermi Large Area Telescope". Monthly Notices of the Royal Astronomical Society. 516 (1): 562–571. arXiv:2110.00309. doi:10.1093/mnras/stac2266. ISSN 0035-8711.
  7. ^ a b Bonafede, A.; Feretti, L.; Murgia, M.; Govoni, F.; Giovannini, G.; Dallacasa, D.; Dolag, K.; Taylor, G. B. (April 2010). "The Coma cluster magnetic field from Faraday rotation measures". Astronomy and Astrophysics. 513: A30. arXiv:1002.0594. Bibcode:2010A&A...513A..30B. doi:10.1051/0004-6361/200913696. ISSN 0004-6361.
  8. ^ Feretti, L.; Dallacasa, D.; Giovannini, G.; Venturi, T. (June 1990). "Astrophysical implications of the study of the tailed radio source NGC 4869 in the Coma cluster". Astronomy & Astrophysics. 232 (2): 337–343. Bibcode:1990A&A...232..337F. ISSN 0004-6361.
  9. ^ Woo, Jong-Hak; Urry, C. Megan (November 2002). "AGN Black Hole Masses and Bolometric Luminosities". The Astronomical Journal. 576. arXiv:astro-ph/0207249. Bibcode:2002ApJ...579..530W. doi:10.1086/342878.
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