NGC 4725

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NGC 4725
N4725s.jpg
NGC 4725 imaged by the Mount Lemmon SkyCenter
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

<span class="mw-page-title-main">Messier 83</span> Barred spiral galaxy in the constellation Hydra

Messier 83 or M83, also known as the Southern Pinwheel Galaxy and NGC 5236, is a barred spiral galaxy approximately 15 million light-years away in the constellation borders of Hydra and Centaurus. Nicolas-Louis de Lacaille discovered M83 on 17 February 1752 at the Cape of Good Hope. Charles Messier added it to his catalogue of nebulous objects in March 1781.

<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">Messier 108</span> Galaxy in the constellation Ursa Major

Messier 108 is a barred spiral galaxy about 46 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 1300</span> Galaxy in the constellation Eridanus

NGC 1300 is a barred spiral galaxy located about 65 million light-years away in the constellation Eridanus. The galaxy is about 110,000 light-years across. It is a member of the Eridanus Cluster, a cluster of 200 galaxies, in a subgroup of 2-4 galaxies in the cluster known as the NGC 1300 Group. It was discovered by John Herschel in 1835.

<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 2207 and IC 2163</span> Pair of colliding spiral galaxies in the constellation Canis Major

NGC 2207 and IC 2163 are a pair of colliding spiral galaxies about 80 million light-years away in the constellation Canis Major. Both galaxies were discovered by John Herschel in 1835.

<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 3432</span> Galaxy in the constellation Leo Minor

NGC 3432 is an edge-on spiral galaxy that can be found in the northern constellation of Leo Minor. It was discovered by German-British astronomer William Herschel on March 19, 1787. This galaxy is located at a distance of 40 million light-years (12.3 Mpc) from the Milky Way. It is interacting with UGC 5983, a nearby dwarf galaxy, and features tidal filaments and intense star formation. Because of these features, it was listed in Halton Arp's Atlas of Peculiar Galaxies.

<span class="mw-page-title-main">NGC 23</span> Galaxy in the constellation Pegasus

NGC 23 is a spiral galaxy located in the northern constellation of Pegasus, around 173.5 megalight-years distant from the Milky Way. It was discovered by William Herschel on 10 September 1784. In the Webb Society Deep-Sky Observer's Handbook, the visual appearance of NGC 23 is described as follows:

Bright, extended ellipse; a bright nuclear structure is noticeably elongated; two weak spiral enhancements emerge from opposite sides of the nucleus, one curving towards a bright star attached on the south end. The galaxy is likely interacting with NGC 9.

<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 2082</span> Spiral galaxy in the constellation Dorado

NGC 2082 is a barred spiral galaxy located approximately 60 million light-years away the constellation Dorado. It was discovered November 30, 1834 by John Herschel. The galaxy was originally considered to be part of the Dorado Group of galaxies, but was later removed from the list. NGC 2082 is now considered a member of the nearby NGC 1947 Group which is part of the Southern Supercluster.

<span class="mw-page-title-main">UGC 2885</span> Large barred spiral galaxy in the constellation Perseus

UGC 2885 is a large barred spiral galaxy of type SA(rs)c in the constellation Perseus. It is 232 million light-years (71 Mpc) from Earth and measures 463,000 ly (142,000 pc) across, making it one of the largest known spiral galaxies. It is also a possible member of the Perseus–Pisces Supercluster.

<span class="mw-page-title-main">NGC 3021</span> Galaxy in the constellation Leo Minor

NGC 3021 is a spiral galaxy in the northern constellation of Leo Minor. It is about 93 million light-years away from Earth, and is receding with a heliocentric radial velocity of 1,537±4 km/s. This galaxy was discovered December 7, 1785 by Anglo-German astronomer William Herschel. The morphological classification of NGC 3021 is SA(rs)bc, which indicates a spiral galaxy with no central bar (SA), an incomplete inner ring structure (rs), and moderate to loosely wound spiral arms (bc).

<span class="mw-page-title-main">NGC 4699</span> Spiral galaxy in the constellation Virgo

NGC 4699 is an intermediate spiral galaxy located in the constellation Virgo. It is located at a distance of about 65 million light years from Earth, which, given its apparent dimensions, means that NGC 4699 is about 85,000 light years across. It was discovered by William Herschel in 1786. It is a member of the NGC 4699 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">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 5965</span> Spiral galaxy in the constellation Draco

NGC 5965 is a spiral galaxy located in the constellation Draco. It is located at a distance of circa 150 million light years from Earth, which, given its apparent dimensions, means that NGC 5965 is about 260,000 light years across. It was discovered by William Herschel on May 5, 1788.

<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.

<span class="mw-page-title-main">NGC 3786</span> Galaxy in the constellation Ursa Major

NGC 3786 is an intermediate spiral galaxy located 107.5 million light-years away in the northern constellation of Ursa Major. It was discovered by English astronomer John Herschel on April 10, 1831. This object appears to form a close pair with its peculiar neighbor to the north, NGC 3788. They show some indications of interaction, such as minor distortion of the disk or tidal features.

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. ↑ Johnson, J. J. (1940). "A Supernova in NGC 4725". Publications of the Astronomical Society of the Pacific. 52 (307): 206. Bibcode:1940PASP...52..206J. doi:10.1086/125168.
  17. ↑ 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.
  18. ↑ 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.
  19. ↑ Transient Name Server entry for SN 1969H. Retrieved 25 March 2023.
  20. ↑ Marsden, Brian G. (11 July 1969). "Circular No. 21255". Central Bureau for Astronomical Telegrams. Smithsonian Astrophysical Observatory. Retrieved 27 November 2024.
  21. ↑ Rosa, M. (1987). "Supernova 1987E in NGC 4725". International Astronomical Union Circular (4373): 1. Bibcode:1987IAUC.4373....1R.
  22. ↑ 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.
  23. ↑ Wild, P. (1987). "Supernova 1987E in NGC 4725?". International Astronomical Union Circular (4382): 1. Bibcode:1987IAUC.4382....1W.
  24. ↑ Filippenko, A. V. (May 1987). Green, D. W. E. (ed.). "No Supernova in NGC 4725". IAU Circular. 4385 (2): 2. Bibcode:1987IAUC.4385....2F.
  25. ↑ "SN 1999gs". Transient Name Server. IAU . Retrieved 27 November 2024.
  26. ↑ Li, W. D. (January 2000). Green, D. W. E. (ed.). "Supernova 1999gs in NGC 4725". IAU Circular. 7345 (2): 2. Bibcode:2000IAUC.7345....2L.
  27. ↑ 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.
  28. ↑ Dong, Subo; ASAS-SN Team (2016). "ASASSN-16gu = dwarf planet Makemake (136472)". The Astronomer's Telegram. 9214: 1. Bibcode:2016ATel.9214....1D.
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