NGC 4725

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NGC 4725
N4725s.jpg
Observation data (J2000 epoch)
Constellation Coma Berenices [1]
Right ascension 12h 50m 26.56929s [2]
Declination +25° 30′ 02.7376″ [2]
Heliocentric radial velocity 1,206±3 km/s [3]
Distance 40.1 ± 6.2  Mly (12.3 ± 1.9  Mpc) [4]
Apparent magnitude  (V)10.1 [3]
Characteristics
Type SAB(r)ab pec [5] or Sb/SB(r)II [6]
Apparent size  (V)9′.77 × 6′.76 [7]
Other designations
IRAS 12480+2547, NGC 4725, UGC 7989, LEDA 43451, PGC 43451 [7] [8]

NGC 4725 is an intermediate barred spiral galaxy with a prominent ring structure, [9] located in the northern constellation of Coma Berenices near the north galactic pole. [10] It was discovered by German-born British astronomer William Herschel on April 6, 1785. [11] The galaxy lies at a distance of approximately 40 megalight-years [4] from the Milky Way. NGC 4725 is the brightest member of the Coma I Group [12] of the Coma-Sculptor Cloud, although it is relatively isolated from the other members of this group. [6] This galaxy is strongly disturbed and is interacting with neighboring spiral galaxy NGC 4747, with its spiral arms showing indications of warping. The pair have an angular separation of 24′, which corresponds to a projected linear separation of 370  kly. [5] A tidal plume extends from NGC 4747 toward NGC 4725. [10]

Contents

A mid-infrared image of NGC 4725 taken by the Spitzer Space Telescope (SST) NGC 4725.jpg
A mid-infrared image of NGC 4725 taken by the Spitzer Space Telescope (SST)

NGC 4725 is a suspected type 2 Seyfert galaxy with a supermassive black hole at the core. [13] The morphological classification of this galaxy is SAB(r)ab pec, [5] indicating a peculiar, weakly-barred spiral galaxy (SAB) with a complete ring surrounding the bar (r) and somewhat tightly-wound spiral arms (ab). It is actually double-barred, a feature found among about a third of all barred spirals. [14] The galactic plane is inclined by approximately 46° to the line of sight from the Earth. [6]

The ring structure of the galaxy is a region of star formation. It is offset from the galactic center and displays non-circular motion. [15] There is a compact radio source positioned approximately 6.2 kly from the nucleus of NGC 4725. Since there is no optical counterpart at that position, this may be a star forming region that is heavily obscured by dust. [9]

Supernovae

Multiple supernova candidate events have been detected in this galaxy:

Related Research Articles

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Messier 100 is a grand design intermediate spiral galaxy in the southern part of the mildly northern Coma Berenices. It is one of the brightest and largest galaxies in the Virgo Cluster and is approximately 55 million light-years from our galaxy, its diameter being 107,000 light years, and being about 60% as large. It was discovered by Pierre Méchain in 1781 and 29 days later seen again and entered by Charles Messier in his catalogue "of nebulae and star clusters". It was one of the first spiral galaxies to be discovered, and was listed as one of fourteen spiral nebulae by Lord William Parsons of Rosse in 1850. NGC 4323 and NGC 4328 are satellite galaxies of M100; the former is connected with it by a bridge of luminous matter.

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

The Pinwheel Galaxy is a face-on spiral galaxy located 21 million light-years from Earth in the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 and was communicated that year to Charles Messier, who verified its position for inclusion in the Messier Catalogue as one of its final entries.

<span class="mw-page-title-main">Messier 61</span> Galaxy in the constellation Virgo

Messier 61 is an intermediate barred spiral galaxy in the Virgo Cluster of galaxies. It was first discovered by Barnaba Oriani on May 5, 1779, six days before Charles Messier discovered the same galaxy. Messier had observed it on the same night as Oriani but had mistaken it for a comet. Its distance has been estimated to be 45.61 million light years from the Milky Way Galaxy. It is a member of the M61 Group of galaxies, which is a member of the Virgo II Groups, a series of galaxies and galaxy clusters strung out from the southern edge of the Virgo Supercluster.

<span class="mw-page-title-main">Centaurus A</span> Radio galaxy in the constellation Centaurus

Centaurus A is a galaxy in the constellation of Centaurus. It was discovered in 1826 by Scottish astronomer James Dunlop from his home in Parramatta, in New South Wales, Australia. There is considerable debate in the literature regarding the galaxy's fundamental properties such as its Hubble type and distance. NGC 5128 is one of the closest radio galaxies to Earth, so its active galactic nucleus has been extensively studied by professional astronomers. The galaxy is also the fifth-brightest in the sky, making it an ideal amateur astronomy target. It is only visible from the southern hemisphere and low northern latitudes.

<span class="mw-page-title-main">NGC 300</span> Galaxy in the constellation Sculptor

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<span class="mw-page-title-main">Messier 77</span> Barred spiral galaxy in the constellation Cetus

Messier 77 (M77), also known as NGC 1068 or the Squid Galaxy, is a barred spiral galaxy in the constellation Cetus. It is about 47 million light-years (14 Mpc) away from Earth. Messier 77 was discovered by Pierre Méchain in 1780, who originally described it as a nebula. Méchain then communicated his discovery to Charles Messier, who subsequently listed the object in his catalog. Both Messier and William Herschel described this galaxy as a star cluster. Today, however, the object is known to be a galaxy.

<span class="mw-page-title-main">Messier 95</span> Galaxy in the constellation Leo

Messier 95, also known as M95 or NGC 3351, is a barred spiral galaxy about 33 million light-years away in the zodiac constellation Leo. It was discovered by Pierre Méchain in 1781, and catalogued by compatriot Charles Messier four days later. In 2012 its most recent supernova was discovered.

<span class="mw-page-title-main">Messier 108</span> Galaxy in the constellation Ursa Major

Messier 108 is a barred spiral galaxy about 28 million light-years away from Earth in the northern constellation Ursa Major. It was discovered by Pierre Méchain in 1781 or 1782. From the Earth, this galaxy is seen almost edge-on.

<span class="mw-page-title-main">NGC 6946</span> Galaxy in the constellations Cepheus & Cygnus

NGC 6946, sometimes referred to as the Fireworks Galaxy, is a face-on intermediate spiral galaxy with a small bright nucleus, whose location in the sky straddles the boundary between the northern constellations of Cepheus and Cygnus. Its distance from Earth is about 25.2 million light-years or 7.72 megaparsecs, similar to the distance of M101 in the constellation Ursa Major. Both were once considered to be part of the Local Group, but are now known to be among the dozen bright spiral galaxies near the Milky Way but beyond the confines of the Local Group. NGC 6946 lies within the Virgo Supercluster.

<span class="mw-page-title-main">NGC 2997</span> Galaxy in the constellation Antlia

NGC 2997 is a face-on unbarred spiral galaxy about 40 million light-years away in the faint southern constellation of Antlia. It was discovered March 4, 1793 by German-born astronomer William Herschel. J. L. E. Dreyer described it as, "a remarkable object, very faint, very large, very gradually then very suddenly bright middle and 4 arcsec nucleus. This is the brightest galaxy of the NGC 2997 group of galaxies, and was featured on the cover of the first edition of Galactic Dynamics by James Binney and Scott Tremaine.

<span class="mw-page-title-main">NGC 1566</span> Galaxy in the constellation Dorado

NGC 1566, sometimes known as the Spanish Dancer, is an intermediate spiral galaxy in the constellation Dorado, positioned about 3.5° to the south of the star Gamma Doradus. It was discovered on May 28, 1826 by Scottish astronomer James Dunlop. At 10th magnitude, it requires a telescope to view. The distance to this galaxy remains elusive, with measurements ranging from 6 Mpc up to 21 Mpc.

<span class="mw-page-title-main">NGC 4639</span> Galaxy in the constellation Virgo

NGC 4639 is a barred spiral galaxy located in the equatorial constellation of Virgo. It was discovered by German-born astronomer William Herschel on April 12, 1784. John L. E. Dreyer described it as "pretty bright, small, extended, mottled but not resolved, 12th magnitude star 1 arcmin to southeast". This is a relatively nearby galaxy, lying approximately 72 million light-years away from the Milky Way. It is a companion to NGC 4654, and the two appear to have interacted roughly 500 million years ago. NGC 4639 is a member of the Virgo Cluster.

<span class="mw-page-title-main">NGC 1808</span> Galaxy in the constellation Columba

NGC 1808 is a barred spiral galaxy located in the southern constellation of Columba, about two degrees to the south and east of Gamma Caeli. It was discovered by Scottish astronomer James Dunlop, who described it as a "faint nebula". The galaxy is a member of the NGC 1808 group, which is part of the larger Dorado Group.

<span class="mw-page-title-main">NGC 4921</span> Galaxy in the constellation Coma Berenices

NGC 4921 is a barred spiral galaxy in the Coma Cluster, located in the constellation Coma Berenices. It is about 320 million light-years from Earth. The galaxy has a nucleus with a bar structure that is surrounded by a distinct ring of dust that contains recently formed, hot blue stars. The outer part consists of unusually smooth, poorly distinguished spiral arms.

<span class="mw-page-title-main">NGC 5584</span> Galaxy in the constellation Virgo

NGC 5584 is a barred spiral galaxy in the constellation Virgo. It was discovered July 27, 1881 by American astronomer E. E. Barnard. Distance determination using Cepheid variable measurements gives an estimate of 75 million light years, whereas the tip of the red-giant branch approach yields a distance of 73.4 million light years. It is receding with a heliocentric radial velocity of 1,637 km/s. It is a member of the Virgo III Groups, a series of galaxies and galaxy clusters strung out to the east of the Virgo Supercluster of galaxies.

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

NGC 4102 is an intermediate barred spiral galaxy located in the northern constellation of Ursa Major. It is visible in a small telescope and has an apparent visual magnitude of 11.2. The galaxy was discovered April 12, 1789 by William Herschel. J. L. E. Dreyer described it as "bright, pretty small, round, brighter middle and bright nucleus". This galaxy is located at a distance of 60 million light years and is receding with a heliocentric radial velocity of 837 km/s. It is a member of the Ursa Major group of galaxies.

<span class="mw-page-title-main">NGC 266</span> Galaxy in the constellation Pisces

NGC 266 is a massive barred spiral galaxy in the constellation Pisces. NGC 266 is located at a distance of 197 megalight-years from the Milky Way. It was discovered on September 12, 1784, by William Herschel. The form of this barred galaxy is described by its morphological classification of SB(rs)ab, which indicates a quasi-ring-like structure (rs) and moderate-to-tightly wound spiral arms (ab). It is the dominant member of a small group with six low-mass galaxies.

<span class="mw-page-title-main">Coma I</span> Galaxy cluster in constellation Coma Berenices

The Coma I Group is a group of galaxies located about 14.5 Mpc (47.3 Mly) away in the constellation Coma Berenices. The brightest member of the group is NGC 4725. The Coma I Group is rich in spiral galaxies while containing few elliptical and lenticular galaxies. Coma I lies in the foreground of the more distant Coma and Leo clusters and is located within the Virgo Supercluster.

<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 4747</span> Galaxy in the constellation of Coma Berenices

NGC 4747 is a barred spiral galaxy located in the constellation Coma Berenices. It is located at a distance of about 35 million light years from Earth, which, given its apparent dimensions, means that NGC 4747 is about 35,000 light years across. It was discovered by William Herschel on April 6, 1785. It is included in the Atlas of Peculiar Galaxies in the interior absorption category.

References

  1. ↑ Sinnott, R. W., ed. (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN   978-0-933346-51-2.
  2. 1 2 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics . 616. A1. arXiv: 1804.09365 . Bibcode: 2018A&A...616A...1G . doi: 10.1051/0004-6361/201833051 . Gaia DR2 record for this source at VizieR.
  3. 1 2 "NASA/IPAC Extragalactic Database". Results for NGC 4725. Retrieved 2006-11-25.
  4. 1 2 Jensen, Joseph B.; Tonry, John L.; Barris, Brian J.; Thompson, Rodger I.; et al. (February 2003). "Measuring Distances and Probing the Unresolved Stellar Populations of Galaxies Using Infrared Surface Brightness Fluctuations". Astrophysical Journal. 583 (2): 712–726. arXiv: astro-ph/0210129 . Bibcode:2003ApJ...583..712J. doi:10.1086/345430. S2CID   551714.
  5. 1 2 3 Wevers, B. M. H. R.; et al. (November 1984). "Neutral hydrogen observations of the interacting galaxies NGC 4725 and NGC 4747". Astronomy and Astrophysics. 140: 125–140. Bibcode:1984A&A...140..125W.
  6. 1 2 3 Gibson, Brad K.; et al. (February 1999). "The Hubble Space Telescope Key Project on the Extragalactic Distance Scale. XVII. The Cepheid Distance to NGC 4725". The Astrophysical Journal. 512 (1): 48–64. arXiv: astro-ph/9810003 . Bibcode:1999ApJ...512...48G. doi:10.1086/306762. S2CID   117635398.
  7. 1 2 Paturel, G.; et al. (December 2003). "HYPERLEDA. I. Identification and designation of galaxies". Astronomy and Astrophysics. 412: 45–55. Bibcode:2003A&A...412...45P. doi: 10.1051/0004-6361:20031411 .
  8. ↑ "NGC 4725". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2020-10-11.
  9. 1 2 Murphy, E. J.; et al. (July 2018). "A New Detection of Extragalactic Anomalous Microwave Emission in a Compact, Optically Faint Region of NGC 4725". The Astrophysical Journal. 862 (1): 7. arXiv: 1805.05965 . Bibcode:2018ApJ...862...20M. doi: 10.3847/1538-4357/aac5f5 . S2CID   56089579. 20.
  10. 1 2 Barber, C. R.; Warwick, R. S. (March 1994). "The spectrum of the extragalactic X-ray background below 3 keV". Monthly Notices of the Royal Astronomical Society. 267 (2): 270–282. Bibcode:1994MNRAS.267..270B. doi: 10.1093/mnras/267.2.270 .
  11. ↑ Seligman, Courtney. "NGC Objects: NGC 4700 - 4749" . Retrieved 2020-10-13.
  12. ↑ Gregory, S.A.; Thompson, L. A. (1977). "The Coma I Galaxy Cloud". The Astrophysical Journal. 213: 345–350. Bibcode:1977ApJ...213..345G. doi:10.1086/155160. ISSN   0004-637X.
  13. ↑ Chiaraluce, E.; et al. (May 2019). "From radio-quiet to radio-silent: low-luminosity Seyfert radio cores". Monthly Notices of the Royal Astronomical Society. 485 (3): 3185–3202. arXiv: 1902.10670 . Bibcode:2019MNRAS.485.3185C. doi:10.1093/mnras/stz595. S2CID   119089306.
  14. ↑ de Lorenzo-Cáceres, A.; Falcón-Barroso, J.; Vazdekis, A.; Martínez-Valpuesta, I. (September 2008). "Stellar Kinematics in Double-Barred Galaxies: The σ-Hollows". The Astrophysical Journal Letters. 684 (2): L83. arXiv: 0808.0517 . Bibcode:2008ApJ...684L..83D. doi:10.1086/592145. S2CID   17252225.
  15. ↑ Buta, R. (March 1988). "The Structure and Dynamics of Ringed Galaxies. V. The Kinematics of NGC 1512, NGC 3351, NGC 4725, and NGC 4736". Astrophysical Journal Supplement. 66: 233. Bibcode:1988ApJS...66..233B. doi:10.1086/191255.
  16. ↑ Minkowski, R. (June 1940). "Spectra of the Supernova in NGC 4725". Publications of the Astronomical Society of the Pacific. 52 (307): 206. Bibcode:1940PASP...52..206M. doi: 10.1086/125169 . S2CID   122418047.
  17. ↑ Minkowski, R. (1964). "Supernovae and Supernova Remnants". Annual Review of Astronomy and Astrophysics. 2: 247. Bibcode:1964ARA&A...2..247M. doi:10.1146/annurev.aa.02.090164.001335.
  18. ↑ Transient Name Server entry for SN 1969H. Retrieved 25 March 2023.
  19. ↑ Rosa, M.; Koishikawa, M. (April 1987). Green, D. W. E. (ed.). "Supernova 1987E in NGC 4725". IAU Circular. 4374 (2): 2. Bibcode:1987IAUC.4374....2R.
  20. ↑ Filippenko, A. V. (May 1987). Green, D. W. E. (ed.). "No Supernova in NGC 4725". IAU Circular. 4385 (2): 2. Bibcode:1987IAUC.4385....2F.
  21. ↑ Li, W. D. (January 2000). Green, D. W. E. (ed.). "Supernova 1999gs in NGC 4725". IAU Circular. 7345 (2): 2. Bibcode:2000IAUC.7345....2L.
  22. ↑ Brimacombe, J.; et al. (July 2016). "ASASSN-16gu: Discovery of A Probable Supernova in NGC 4725". The Astronomer's Telegram. 9211: 1. Bibcode:2016ATel.9211....1B.
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