NGC 7625

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NGC 7625
NGC7625 - SDSS DR14.jpg
Sloan Digital Sky Survey image of NGC 7625
Observation data (J2000 epoch)
Constellation Pegasus
Right ascension 23h 20m 30.132s [1]
Declination +17° 13′ 32.16″ [1]
Heliocentric radial velocity 1,630±3 km/s [2]
Distance 78.3 ± 7.5  Mly (24.0 ± 2.3  Mpc) [3]
Apparent magnitude  (V)12.9 [4]
Apparent magnitude  (B)12.94 [5]
Characteristics
Type Sa/S pec [6]
Mass/Light ratio 2.5 [4]   M☉/L☉
Apparent size  (V)1.6′ × 1.4′ [5]
Other designations
NGC 7625, Arp 212, UGC 12529, LEDA 71133, MCG +03-59-038, PGC 71133 [7]

NGC 7625, or Arp 212, is a peculiar galaxy in the constellation of Pegasus. It was discovered on October 15, 1784, by William Herschel. [8] In his New General Catalogue (1888), J. L. E. Dreyer described it as pretty bright, considerably small, round, with a suddenly much brighter middle. [9] It is located at an estimated distance of 78 million light-years (24.0 megaparsecs ) from the Milky Way galaxy. [3]

Halton Arp included NGC 7625 as object 212 in his Atlas of Peculiar Galaxies , indicating it displayed unexplained physical processes. [10] In the Third Reference Catalogue of Bright Galaxies, NGC 7625 was assigned a morphological classification of SA(rs)a pec, which indicates a peculiar spiral galaxy (SA) with a transitional ring structure (rs) and tightly wound spiral arms (a). [11] In 1981 it was designated a blue compact dwarf by T. X. Thaun and G. E. Martin on the basis of strong emission lines from ionized gas. [12] A prominent visible feature is an open ring of dust lanes with an angular radius of about 15″–20″. [13]

NGC 7625 displays indications of a recent interaction with another galaxy. Velocity measurements suggest the inner part of the galaxy is rotating in a different plane than the outer parts. The angle between these two planes increases with distance from the galactic center, reaching 50° at a radius of 6 kpc. Hence this may be a polar-ring galaxy, with the added gas accreted from the dwarf satellite galaxy UGC 12549. [13] There is a large amount of gas and dust undergoing significant star formation, with emission of H-alpha concentrated at the core and in separate knots along exterior curved structures. [6]

On October 28, 2023 type Ia supernova SN 2023vyl was discovered in this galaxy by ATLAS. [14] [15]

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<span class="mw-page-title-main">NGC 5929</span> Seyfert galaxy in the constellation Boötes

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<span class="mw-page-title-main">NGC 5579</span> Spiral galaxy in the constellation Boötes

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<span class="mw-page-title-main">NGC 5665</span> Galaxy in the constellation Boötes

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<span class="mw-page-title-main">NGC 922</span> Peculiar galaxy in the constellation Fornax

NGC 922 is a peculiar galaxy in the southern constellation of Fornax, located at a distance of 142 Mly from the Milky Way. It is one of the nearest known collisional galaxies. This object was described by the Herschels as "considerably faint, pretty large, round, gradually pretty much brighter middle." The general form is described by the morphological classification of SB(s)cd pec, which indicates a peculiar (pec) barred spiral galaxy (SB) with no inner ring system around the bar (s) and loosely-wound spiral arms (cd).

<span class="mw-page-title-main">NGC 4102</span> Galaxy in the constellation Ursa Major

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<span class="mw-page-title-main">NGC 1614</span> Galaxy in the constellation Eridanus

NGC 1614 is the New General Catalogue identifier for a spiral galaxy in the equatorial constellation of Eridanus. It was discovered on December 29, 1885 by American astronomer Lewis Swift, who described it in a shorthand notation as: pretty faint, small, round, a little brighter middle. The nebula was then catalogued by Danish-Irish astronomer J. L. E. Drayer in 1888. When direct photography became available, it was noted that this galaxy displayed some conspicuous peculiarities. American astronomer Halton Arp included it in his 1966 Atlas of Peculiar Galaxies. In 1971, Swiss astronomer Fritz Zwicky described it as a "blue post-eruptive galaxy, compact patchy core, spiral plumes, long blue jet SSW".

<span class="mw-page-title-main">NGC 7469</span> Galaxy located in the constellation Pegasus

NGC 7469 is an intermediate spiral galaxy in the constellation of Pegasus. NGC 7469 is located about 200 million light-years away from Earth, which means, given its apparent dimensions, that NGC 7469 is approximately 90,000 light-years across. It was discovered by William Herschel on November 12, 1784.

<span class="mw-page-title-main">NGC 4302</span> Galaxy in the constellation Coma Berenices

NGC 4302 is an edge-on spiral galaxy located about 55 million light-years away in the constellation Coma Berenices. It was discovered by astronomer William Herschel on April 8, 1784 and is a member of the Virgo Cluster.

<span class="mw-page-title-main">NGC 5728</span> Spiral galaxy in the constellation Libra

NGC 5728 is an active barred spiral galaxy located 146 million light years away in the southern constellation of Libra. It was discovered on May 7, 1787 by William Herschel. The designation comes from the New General Catalogue of J. L. E. Dreyer, published in 1888. It has an apparent visual magnitude of 13.40 and spans an angle of 3.4 arcminutes. The galaxy shows a red shift of 0.00935 and has a heliocentric radial velocity of 2,803 km/s. It has an estimated mass of 72 billion times the mass of the Sun and stretches around 30 kpc across.

<span class="mw-page-title-main">NGC 3656</span> Peculiar galaxy in the constellation Ursa Major

NGC 3656 is a peculiar galaxy formed by the collision of two galaxies in the constellation of Ursa Major. It is located about 135 million light years away from Earth, which means, given its apparent dimensions, that NGC 3656 is approximately 70,000 light years across. It was discovered by William Herschel on April 14, 1789.

References

  1. 1 2 Skrutskie, Michael F.; et al. (February 1, 2006), "The Two Micron All Sky Survey (2MASS)", The Astronomical Journal , 131 (2): 1163–1183, Bibcode:2006AJ....131.1163S, doi: 10.1086/498708 , ISSN   0004-6256, S2CID   18913331.
  2. ↑ Yu, Niankun; et al. (August 2022), "Statistical Analysis of H I Profile Asymmetry and Shape for Nearby Galaxies", The Astrophysical Journal Supplement Series, 261 (2), id. 21, arXiv: 2203.13404 , Bibcode:2022ApJS..261...21Y, doi: 10.3847/1538-4365/ac626b .
  3. 1 2 Haynes, Martha P.; et al. (July 2018), "The Arecibo Legacy Fast ALFA Survey: The ALFALFA Extragalactic H I Source Catalog", The Astrophysical Journal, 861 (1): 49, arXiv: 1805.11499 , Bibcode:2018ApJ...861...49H, doi: 10.3847/1538-4357/aac956 , 49.
  4. 1 2 Demoulin, Marie-Helene (July 1969), "Observations of Galaxies with Large amounts of Dust. I. The Galaxy NGC 7625", Astrophysical Journal, 157: 69, Bibcode:1969ApJ...157...69D, doi:10.1086/150050.
  5. 1 2 Bratton, Mark (September 15, 2011), The Complete Guide to the Herschel Objects: Sir William Herschel's Star Clusters, Nebulae and Galaxies, Cambridge University Press, p. 362, ISBN   9781107376854.
  6. 1 2 Moiseev, A. V. (October 2008), Funes, José G.; J., S.; Corsini, Enrico Maria (eds.), "3D Spectroscopy of the Ionized Gas Kinematics in Galactic Rings", Proceedings of the conference held 1–5 October 2007 at the Centro Convegni Matteo Ricci, Rome, Italy, Formation and Evolution of Galaxy Disks ASP Conference Series, vol. 396, San Francisco: Astronomical Society of the Pacific, pp. 283–284, arXiv: 0801.1550 , Bibcode:2008ASPC..396..283M.
  7. ↑ "NGC 7625". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2024-01-25.{{cite web}}: CS1 maint: postscript (link)
  8. ↑ Seligman, Courtney, "NGC Objects: NGC 7600 - 7649", Celestial Atlas, retrieved 2024-01-28.
  9. ↑ Frommert, Hartmut, NGC 7625, SEDS , retrieved 2024-01-28.
  10. ↑ Arp, Halton (November 1966), "Atlas of Peculiar Galaxies", Astrophysical Journal Supplement, 14: 1, Bibcode:1966ApJS...14....1A, doi:10.1086/190147.{{citation}}: CS1 maint: date and year (link)
  11. ↑ De Vaucouleurs, Gerard; et al. (1991), Third Reference Catalogue of Bright Galaxies, 3.9, Bibcode:1991rc3..book.....D.
  12. ↑ Thuan, T. X.; Martin, G. E. (August 1981), "Blue compact dwarf galaxies. I. Neutral hydrogen observations of 115 galaxies", Astrophysical Journal, 247: 823–848, Bibcode:1981ApJ...247..823T, doi:10.1086/159094.
  13. 1 2 Moiseev, A. V. (September 2008), "Warped polar ring in the Arp 212 galaxy", Astrophysical Bulletin, 63 (3): 201–215, arXiv: 0808.1696 , Bibcode:2008AstBu..63..201M, doi:10.1134/S1990341308030012.
  14. ↑ Supernovae 2023vyl in NGC 7625, Astronomy Section, Rochester Academy of Science, January 26, 2024, retrieved 2024-01-28.
  15. ↑ "SN 2023vyl". Transient Name Server. IAU . Retrieved 14 August 2024.

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