NGC 5850 explained

NGC 5850
Epoch:J2000
Ra:15h 07m 08s
Dec:+01° 32 39
Sbrightness:23 mag/arcsec2
Appmag B:11.5
Names:PGC 53979, UGC 9715, IRAS 15045+0144
H Radial V:2 545 ± 1 km/s
Constellation Name:Virgo
Dist Ly:NaNMpc
References:List of NGC objects (5001-6000)

NGC 5850 is a barred spiral galaxy in the constellation Virgo. Its speed relative to the cosmic microwave background is 2,735 ± 13 km/s,[1] which corresponds to a Hubble distance of 40.3 ± 2.8 Mpc (~131 million ly).[2] NGC 5850 was discovered by German-British astronomer William Herschel in 1786.[3]

Characteristics

The luminosity class of NGC 5850 is II and it has a broad HI1 line.[4] It is also classified a LINER galaxy; a galaxy whose nucleus presents an emission spectrum characterized by broad lines of weakly ionized atoms.[5] [6]

To date, seven non-redshift measurements yield a distance of 18.7 ± 1.75 Mpc (~61 million ly), which is far outside the Hubble distance values.[7] Note that it is with the average value of independent measurements, when they exist, that the NASA/IPAC database calculates the diameter of a galaxy and that consequently the diameter of NGC 5850 could be approximately 58.7 kpc (~191,000 ly) if we used the Hubble distance to calculate it.[8]

Morphology

NGC 5850 was used by Gérard de Vaucouleurs as a galaxy of morphological type SB(r)b in his galaxy atlas.[9] [10] It is classified as a prototype double-barred system early-type spiral galaxy by other studies as well.[11]

In 2002, Eskridge, Frogel and Pogge published a paper, describing the morphology of 205 closely spaced spiral galaxies. The observations were carried out in the H band of infrared and in the B band (blue). According to Eskridge and his colleagues, NGC 5850 is a spiral galaxy of type SB(r)ab in the B band and type SB(r)0/a in the H band. The isophotes of the outer bulb are almost circular. The nucleus appears elliptical. The bulb is crossed by a very long bar with ansae at its end. The bar is inclined at 60 degrees to the interior bulb. A complete inner ring is formed at the end of the bar and beyond there is a faint spiral structure. The spiral arms appear to form an incomplete outern pseudo-ring.[12] One of these spiral arms of NGC 5850 appears broken, likely caused by an interaction with a north-west object.[13]

Possible galaxy pair?

NGC 5850 is close to its neighbor, NGC 5846. However, the distance between them is exactly 40 million light-years. Although they not a physical pair, it is possible that the two galaxies might have experienced a high-speed encounter around 200 million years ago.[14]

Supernova

One supernova has been observed in NGC 5850: SN 1987B. It was discovered by Robert Evans on 24 February 1987 lying 71" west and 145" south of the nucleus, shining at magnitude 15.[15] The spectral analysis indicates that it was a non-conventional type II supernova.[16]

See also

Further bibliography

External links

Notes and References

  1. Web site: NGC 5850 and 5846 in Virgo . 2024-04-16 . www.jthommes.com.
  2. Web site: NGC 5850 . 2024-04-16 . www.phys.ttu.edu.
  3. Web site: Celestial Atlas entry for NGC 5850 . 2024-04-16 . cseligman.com.
  4. Web site: info@noirlab.edu . NGC 5850 . 2024-04-16 . www.noirlab.edu . en.
  5. Web site: NGC 5850 - LINER-type Active Galactic Nucleus . 2024-08-08 . simbad.u-strasbg.fr.
  6. Bremer . M. . Scharwächter . J. . Eckart . A. . Valencia-S . M. . Zuther . J. . Combes . F. . Garcia-Burillo . S. . Fischer . S. . 2013-10-01 . What produces the extended LINER-type emission in the NUGA galaxy NGC 5850? . Astronomy & Astrophysics . en . 558 . A34 . 10.1051/0004-6361/201322009 . 0004-6361. 1308.3492 .
  7. Web site: NASA/IPAC Extragalactic Database . Results for NGC 5850 . 27 July 2024.
  8. Web site: NED Query Results for NGC 5850 . 2024-08-08 . ned.ipac.caltech.edu.
  9. Web site: NGC 5850 . 2024-08-08 . kudzu.astr.ua.edu.
  10. Web site: Gérard de Vaucouleurs' Atlas of Galaxies . 2024-08-08 . cseligman.com.
  11. Buta . R. . Crocker . D. A. . 1993-04-01 . Metric Characteristics of Nuclear Rings and Related Features in Spiral Galaxies . The Astronomical Journal . 105 . 1344 . 10.1086/116514 . 1993AJ....105.1344B . 0004-6256.
  12. Eskridge . Paul B. . Frogel . Jay A. . Pogge . Richard W. . Quillen . Alice C. . Berlind . Andreas A. . Davies . Roger L. . DePoy . D. L. . Gilbert . Karoline M. . Houdashelt . Mark L. . Kuchinski . Leslie E. . Ramirez . Solange V. . Sellgren . K. . Stutz . Amelia . Terndrup . Donald M. . Tiede . Glenn P. . Near-Infrared and Optical Morphology of Spiral Galaxies . The Astrophysical Journal Supplement Series . November 2002 . 143 . 1 . 73–111 . 10.1086/342340. astro-ph/0206320 . 2002ApJS..143...73E .
  13. Prieto . Mercedes . Gottesman . S. T. . Aguerri . Jose-Alfonso L. . Varela . Antonia-Maria . October 1997 . Structural Components of NGC 5850. . The Astronomical Journal . 114 . 1413 . 10.1086/118573 . 1997AJ....114.1413P . 0004-6256.
  14. Higdon . James L. . Buta . Ronald J. . Purcell . Guy B. . 1998-01-01 . An Optical and H i Study of NGC 5850: Victim of a High-Speed Encounter? . The Astronomical Journal . 115 . 1 . 80–104 . 10.1086/300193 . 1998AJ....115...80H . 0004-6256.
  15. https://www.wis-tns.org/object/1987B Transient Name Server entry for SN 1987B.
  16. Tsvetkov . D. Y. . Observations of Supernovae 1987B and 1987F . Soviet Astronomy Letters . 1 April 1989 . 15 . 129 . 1989SvAL...15..129T .

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