NGC 708 explained

NGC 708
Upright:1.15
Constellation Name:Andromeda
Epoch:J2000
Type:E[1]
Dist Ly:73.3Mpc
Z:0.016195
H Radial V:4,855 km/s
Group Cluster:Abell 262
Appmag V:13.70
Size V:3.0 x 2.5
Size:~62kpc (estimated)
Names:CGCG 522-39, MCG 6-5-31, PGC 6962, UGC 1348, B2 0149+35

NGC 708 is an elliptical galaxy located 240 million light-years away[2] in the constellation Andromeda and was discovered by astronomer William Herschel on September 21, 1786.[3] It is classified as a cD galaxy[4] [5] and is the brightest member of Abell 262.[6] [7] NGC 708 is a weak FR I radio galaxy[8] [9] [10] [11] and is also classified as a type 2 Seyfert galaxy.[12]

NGC 708 is surrounded by 4,700 globular clusters.[13]

Dust lane

Discovered in 1979 by Kotanyi et al., NGC 708 has a thin dust lane[14] with an irregular structure.[15] [16] [17] Besides the dust lane, there are also patches of dust that cross the nucleus. These features are oriented nearly perpendicular to the radio emission of the galaxy.[18] [19] [20] [21] [6] The lane appears to be a nearly edge-on dust disk[22] with a length of 5kpc.[23]

The dust lane appears to have formed from a cooling accretion flow of intracluster medium (ICM) onto NGC 708.

Supermassive black hole

NGC 708 has a supermassive black hole with an estimated mass of (M☉) (108.46) .[24]

The supermassive black hole is powering the radio jets and lobes in the galaxy.

Radio morphology

NGC 708 contains two radio jets that are mildly bent[25] and extend into ''s'' shaped double radio lobes with a total length of 60kpc.

Chandra observations have shown that the lobes have created a cavity in the intracluster medium of Abell 262.

Possible interaction

NGC 708 may be interacting with NGC 705 which lies about 20.6kpc to the south-west.

See also

Notes and References

  1. Web site: NASA/IPAC Extragalactic Database . Results for NGC 708 . 2018-12-22.
  2. Web site: Your NED Search Results. ned.ipac.caltech.edu. 2018-12-23.
  3. Web site: New General Catalog Objects: NGC 700 – 749. cseligman.com. en-US. 2018-11-21.
  4. Lyskova. N.. Churazov. E.. Moiseev. A.. Sil'chenko. O.. Zhuravleva. I.. 2014-05-15. Stellar kinematics of X-ray bright massive elliptical galaxies. 1404.2729. Monthly Notices of the Royal Astronomical Society. 441. 3. 2013–2033. 10.1093/mnras/stu717. free . 0035-8711. 2014MNRAS.441.2013L.
  5. Goullaud. Charles F.. Jensen. Joseph B.. Blakeslee. John P.. Ma. Chung-Pei. Greene. Jenny E.. Thomas. Jens. 2018-03-20. The MASSIVE Survey. IX. Photometric Analysis of 35 High-mass Early-type Galaxies with HST WFC3/IR. The Astrophysical Journal. 856. 1. 11. 10.3847/1538-4357/aab1f3. 1538-4357. 2018ApJ...856...11G. 1801.08245. 119458429 . free .
  6. West. M. J.. 1994-05-01. Anisotropic Mergers at High Redshifts - the Formation of CD Galaxies and Powerful Radio Sources. 1994MNRAS.268...79W. Monthly Notices of the Royal Astronomical Society. 268. 79–102. 10.1093/mnras/268.1.79. 0035-8711. free.
  7. Web site: NGC 708. SIMBAD Astronomical Database. 2018-12-23.
  8. Parma. P.. Morganti. R.. Raffaella Morganti. Fanti. R.. Ruiter. De. R. H.. Chiaberge. M.. Celotti. A.. Capetti. A.. 2001-12-06. The HST survey of the B2 sample of radio-galaxies: optical nuclei and the FRI/BL Lac unified scheme. Astronomy & Astrophysics. 383. 104–111. astro-ph/0112151. en. 10.1051/0004-6361:20011714. 2002A&A...383..104C. 2457431.
  9. Hu. C.. Wang. J.-M.. 2005-08-01. Captures of Red Giant Stars by Black Holes in Elliptical Galaxies: Feedback to the Hot Gas. The Astrophysical Journal. 630. 2. L125–L128. astro-ph/0508021. en. 10.1086/491670. 2005ApJ...630L.125W. 119078675.
  10. Clarke. T. E.. McNamara. Brian R.. Sarazin. Craig L.. Blanton. Elizabeth L.. Elizabeth Blanton. 2004-05-21. Chandra Observation of the Central Region of the Cooling Flow Cluster Abell 262: A Radio Source that is a Shadow of its Former Self?. The Astrophysical Journal. 612. 2. 817–824. astro-ph/0405425. en. 10.1086/422677. 2004ApJ...612..817B. 2628446.
  11. Kassim. N. E.. Douglass. E. M.. Gopal-Krishna. Anderson. L. D.. Sarazin. C. L.. Blanton. E. L.. Elizabeth Blanton. Clarke. T. E.. 2009-03-04. Tracing Multiple Generations of AGN Feedback in the Core of Abell 262. The Astrophysical Journal. 697. 2. 1481–1492. 0903.0844. en. 10.1088/0004-637X/697/2/1481. 2009ApJ...697.1481C. 14636695.
  12. Reddy. Naveen A.. Yun. Min S.. 2004-01-10. Radio and Far-Infrared Emission as Tracers of Star Formation and AGN in Nearby Cluster Galaxies. astro-ph/0309649. The Astrophysical Journal. 600. 2. 695–715. 10.1086/379871. 0004-637X. 2004ApJ...600..695R. 15068448.
  13. Harris. William E.. Harris. Gretchen L. H.. Alessi. Matthew. 2013-07-09. A Catalog of Globular Cluster Systems: What Determines the Size of a Galaxy's Globular Cluster Population?. 1306.2247. The Astrophysical Journal. 772. 2. 82. 10.1088/0004-637X/772/2/82. 0004-637X. 2013ApJ...772...82H. 119113886.
  14. Kotanyi. C. G.. Ekers. R. D.. 1979-03-01. Radio galaxies with dust lanes. 1979A&A....73L...1K. Astronomy and Astrophysics. 73. L1–L3. 0004-6361.
  15. Capetti. A.. de Ruiter. H. R.. Fanti. R.. Morganti. R.. Raffaella Morganti. Parma. P.. Ulrich. M.-H.. 2000-09-05. The HST snapshot survey of the B2 sample of low luminosity radio-galaxies: a picture gallery. Astronomy and Astrophysics. 362. 871. astro-ph/0009056. 2000A&A...362..871C.
  16. Taylor. G. B.. Giroletti. M.. Giovannini. G.. Liuzzo. E.. 2009-10-01. The Bologna complete sample of nearby radio sources – II. Phase referenced observations of faint nuclear sources. Astronomy & Astrophysics. en. 505. 2. 509–520. 10.1051/0004-6361/200912586. 1432-0746. 2009A&A...505..509L. 0908.4391. 5288263.
  17. Taylor. G. B.. Capetti. A.. Giroletti. M.. Giovannini. G.. Buttiglione. S.. Liuzzo. E.. 2013-02-01. Compact sources in the Bologna Complete Sample: high-resolution VLA observations and optical data. Astronomy & Astrophysics. en. 550. A76. 10.1051/0004-6361/201220012. 1432-0746. 2013A&A...550A..76L. 1209.4204. 119233588.
  18. Parma. P.. de Ruiter. H. R.. Fanti. C.. Fanti. R.. 1986-04-01. VLA observations of low luminosity radio galaxies. I – Sources with angular size smaller than two arcminutes. 1986A&AS...64..135P. Astronomy and Astrophysics Supplement Series. 64. 135–171. 0365-0138.
  19. Colina. L.. Perez-Fournon. I.. January 1990. Optical observations of galaxies containing radio jets – A catalog of sources with redshift smaller than 0.15. 1990ApJS...72...41C. The Astrophysical Journal Supplement Series. en. 72. 41–59. 10.1086/191408. 0067-0049. free.
  20. Taylor. G. B.. Giroletti. M.. Giovannini. G.. Liuzzo. E.. 2010-06-01. Parsec-scale properties of brightest cluster galaxies. Astronomy & Astrophysics. en. 516. A1. 10.1051/0004-6361/200913888. 1432-0746. 2010A&A...516A...1L. 1002.1380. 14536396.
  21. Durret. F.. 1994-05-01. Nuclear and extranuclear ionized gas in nine Seyfert 2 galaxies. 1994A&AS..105...57D. Astronomy and Astrophysics Supplement Series. 105. 57–66. 0365-0138.
  22. Wegner. G. A.. Corsini. E. M.. Thomas. J.. Saglia. R. P.. Bender. R.. Pu. S. B.. 2012. Further Evidence for Large Central Mass-to-light Ratios in Early-type Galaxies: The Case of Ellipticals and Lenticulars in the A262 Cluster. The Astronomical Journal. en. 144. 3. 78. 10.1088/0004-6256/144/3/78. 1538-3881. 2012AJ....144...78W. 1206.5768. 118679035.
  23. McCarthy. P. J.. van Bruegel. W. J. M.. Heckman. T.. Miley. G. K.. Filippenko. A. V.. 1985-09-01. Optical and Radio Observations of the Cooling-Flow Galaxy NGC 708. Bulletin of the American Astronomical Society. 1985BAAS...17..865M. 17. 865.
  24. Woo. Jong-Hak. Urry. C. Megan. 2002. Active Galactic Nucleus Black Hole Masses and Bolometric Luminosities. The Astrophysical Journal. en. 579. 2. 530–544. 10.1086/342878. 0004-637X. 2002ApJ...579..530W. astro-ph/0207249. 118160249.
  25. Sofue. Yoshiaki. Wakamatsu. Ken-Ichi. August 1993. CO in elliptical galaxies and the universal CO-to-dust ratio. Publications of the Astronomical Society of Japan. 45. 4–6264. 529–538. 1993PASJ...45..529S.

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