NGC 4670

Last updated
NGC 4670
Arp163.png
NGC 4670 by Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Coma Berenices
Right ascension 12h 45m 17.1s [1]
Declination +27° 07′ 32″ [1]
Redshift 0.003630 ± 0.000005 [1]
Heliocentric radial velocity 1,088 ± 1 km/s [1]
Distance 57.6 ± 17 Mly (17.7 ± 4.7 Mpc) [1]
Apparent magnitude  (V)12.2 [2]
Characteristics
Type SB(s)0/a pec [1]
Apparent size  (V)1.4′ × 1.1′ [1]
Notable features Blue compact dwarf
Other designations
UGC 7930, Arp 163, Haro 9, MCG +05-30-072, KUG 1242+273, IRAS 12428+2724, PGC 42987

NGC 4670 is a blue compact galaxy in the constellation Coma Berenices. The galaxy lies about 60 million light years away from Earth, which means, given its apparent dimensions, that NGC 4670 is approximately 25,000 light years across. [1] It was discovered by William Herschel on April 6, 1785. [3]

Contents

Characteristics

The overall shape of the galaxy is categorised as peculiar and it has been categorised as amorphous or as barred lenticular galaxy. NGC 4670 is included in the Atlas of Peculiar Galaxies in the galaxies with diffuse counter tails category. The gas kinematics indicate the presence of a central bar. [4] The galaxy is seen with an 28° inclination but it is possibly warped. [5]

NGC 4670 is characterised by its blue color, which was noted by Guillermo Haro in a study published in 1956. [6] Such galaxies are characterised by episodes of intense star formation. The centre of NGC 4670 hosts a supergiant HII region and also hosts most of the hydrogen of the galaxy. The hydrogen lies in three clouds with an estimated mass of 108  M☉ . [5] Four other HII regions are visible near the central region. [7]

The galaxy has also ionised gas outside of the central region, forming bubbles and filaments. The two larger filaments extend to the southwest and northeast and a have a calculated length of 7.5 and 6.5 kpc respectively. [4]

An X-ray and radio source has been detected in the galaxy at the location of a star cluster complex but its nature is uncertain. It could be a massive black hole, an ultraluminous X-ray bubble, an X-ray binary star or a supernova remnant. [8]

Nearby galaxies

NGC 4670 is considered to be a member of the NGC 4565 Group, which also includes, apart from NGC 4565, the galaxies NGC 4494, NGC 4562, NGC 4725, and NGC 4747. [9]

Related Research Articles

NGC 4631 is a barred spiral galaxy in the constellation Canes Venatici about 30 million light years away from Earth. This galaxy's slightly distorted wedge shape gives it the appearance of a herring or a whale, hence its nickname. Because this nearby galaxy is seen edge-on from Earth, professional astronomers observe this galaxy to better understand the gas and stars located outside the plane of the galaxy.

<span class="mw-page-title-main">NGC 1705</span> Galaxy in the constellation Pictor

NGC 1705 is a peculiar lenticular galaxy and a blue compact dwarf galaxy (BCD) in the southern constellation of Pictor, positioned less than a degree to the east of Iota Pictoris, and is undergoing a starburst. With an apparent visual magnitude of 12.6 it requires a telescope to observe. It is estimated to be approximately 17 million light-years from the Earth, and is a member of the Dorado Group.

<span class="mw-page-title-main">NGC 5238</span> Galaxy in constellation Canes Venatici

NGC 5238 is an irregular galaxy in the constellation Canes Venatici. Located at a comoving distance of 4.51 Mpc, it is 64.4 arcseconds in diameter. It has sometimes been classified as a blue compact dwarf galaxy. Although some authors have hypothesized it to be a member of the M101 Group of galaxies, it is currently believed to be an isolated galaxy.

<span class="mw-page-title-main">NGC 2782</span> Galaxy in the constellation Lynx

NGC 2782 is a peculiar spiral galaxy that formed after a galaxy merger in the constellation Lynx. The galaxy lies 75 million light years away from Earth, which means, given its apparent dimensions, that NGC 2782 is approximately 100,000 light years across. NGC 2782 has an active galactic nucleus and it is a starburst and a type 1 Seyfert galaxy. NGC 2782 is mentioned in the Atlas of Peculiar Galaxies in the category galaxies with adjacent loops.

<span class="mw-page-title-main">NGC 4494</span> Galaxy in the constellation Coma Berenices

NGC 4494 is an elliptical galaxy located in the constellation Coma Berenices. It is located at a distance of circa 45 million light years from Earth, which, given its apparent dimensions, means that NGC 4494 is about 60,000 light years across. It was discovered by William Herschel in 1785.

<span class="mw-page-title-main">NGC 5084</span> Galaxy in the constellation Virgo

NGC 5084 is a lenticular galaxy in the constellation of Virgo. It is located at a distance of about 80 million light years from Earth, which, given its apparent dimensions, means that NGC 5084 is at least 200,000 light years across. It is one of the largest and most massive galaxies in the Virgo Supercluster. William Herschel discovered it on March 10, 1785. It is a member of the NGC 5084 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. The galaxy is seen nearly edge-on, with inclination 86°, and features a warped disk and large quantities of HI gas extending along the disk, probably accumulated after multiple accretions of smaller galaxies.

<span class="mw-page-title-main">NGC 3893</span> Galaxy in the constellation Ursa Major

NGC 3893 is a spiral galaxy located in the constellation Ursa Major. It is located at a distance of circa 50 million light years from Earth, which, given its apparent dimensions, means that NGC 3893 is about 70,000 light years across. It was discovered by William Herschel on February 9, 1788. NGC 3893 interacts with its satellite, NGC 3896.

<span class="mw-page-title-main">NGC 2336</span> Galaxy in the constellation Camelopardalis

NGC 2336 is a barred spiral galaxy located in the constellation Camelopardalis. It is located at a distance of circa 100 million light years from Earth, which, given its apparent dimensions, means that NGC 2336 is about 200,000 light years across. It was discovered by Wilhelm Tempel in 1876.

<span class="mw-page-title-main">NGC 7213</span> Galaxy in the constellation Grus

NGC 7213 is a lenticular galaxy located in the constellation Grus. It is located at a distance of circa 70 million light-years from Earth, which, given its apparent dimensions, means that NGC 7213 is about 75,000 light-years across. It was discovered by John Herschel on September 30, 1834. It is an active galaxy with characteristics between a type I Seyfert galaxy and LINER.

<span class="mw-page-title-main">NGC 5982</span> Galaxy in the constellation Draco

NGC 5982 is an elliptical galaxy located in the constellation Draco. It is located at a distance of circa 130 million light years from Earth, which, given its apparent dimensions, means that NGC 5982 is about 100,000 light years across. It was discovered by William Herschel on May 25, 1788.

<span class="mw-page-title-main">NGC 7741</span> Galaxy in the constellation Pegasus

NGC 7741 is a barred spiral galaxy located in the constellation Pegasus. It is located at a distance of circa 40 million light years from Earth, which, given its apparent dimensions, means that NGC 7741 is about 50,000 light years across. It was discovered by William Herschel on September 10, 1784.

<span class="mw-page-title-main">NGC 5846</span> Galaxy in the constellation Virgo

NGC 5846 is an elliptical galaxy located in the constellation Virgo. It is located at a distance of circa 90 million light years from Earth, which, given its apparent dimensions, means that NGC 5846 is about 110,000 light years across. It was discovered by William Herschel on February 24, 1786. It lies near 110 Virginis and is part of the Herschel 400 Catalogue. It is a member of the NGC 5846 Group of galaxies, itself one of the Virgo III Groups strung out to the east of the Virgo Supercluster of galaxies.

<span class="mw-page-title-main">NGC 1386</span> Galaxy in the constellation Eridanus

NGC 1386 is a spiral galaxy located in the constellation Eridanus. It is located at a distance of circa 53 million light years from Earth, which, given its apparent dimensions, means that NGC 1386 is about 50,000 light years across. It is a Seyfert galaxy, the only one in Fornax Cluster.

<span class="mw-page-title-main">NGC 4278</span> Galaxy in the constellation Coma Berenices

NGC 4278 is an elliptical galaxy located in the constellation Coma Berenices. It is located at a distance of circa 55 million light years from Earth, which, given its apparent dimensions, means that NGC 4278 is about 65,000 light years across. It was discovered by William Herschel on March 13, 1785. NGC 4278 is part of the Herschel 400 Catalogue and can be found about one and 3/4 of a degree northwest of Gamma Comae Berenices even with a small telescope.

<span class="mw-page-title-main">NGC 5363</span> Galaxy in the constellation Virgo

NGC 5363 is a lenticular galaxy located in the constellation Virgo. It is located at a distance of circa 65 million light years from Earth, which, given its apparent dimensions, means that NGC 5363 is about 100,000 light years across. It was discovered by William Herschel on January 19, 1784. It is a member of the NGC 5364 Group of galaxies, itself one of the Virgo III Groups strung out to the east of the Virgo Supercluster of galaxies.

<span class="mw-page-title-main">NGC 2273</span> Galaxy in the constellation Lynx

NGC 2273 is a barred spiral galaxy located in the constellation Lynx. It is located at a distance of circa 95 million light years from Earth, which, given its apparent dimensions, means that NGC 2273 is about 100,000 light years across. It was discovered by Nils Dunér on September 15, 1867.

<span class="mw-page-title-main">NGC 2964</span> Spiral galaxy in the constellation Leo

NGC 2964 is an intermediate spiral galaxy located in the constellation Leo. It is located at a distance of circa 60 million light years from Earth, which, given its apparent dimensions, means that NGC 2964 is about 60,000 light years across. It was discovered by William Herschel on December 7, 1785.

<span class="mw-page-title-main">NGC 1142</span> Interacting and distorted spiral galaxy in the constellation Cetus

NGC 1142 is a distorted spiral galaxy in the constellation of Cetus. It is located about 370 million light years away from Earth, which means, given its apparent dimensions, that NGC 1142 is approximately 170,000 light years across. It is a type 2 Seyfert galaxy. It interacts with the elliptical galaxy NGC 1141.

<span class="mw-page-title-main">NGC 2445</span> Galaxy in the constellation Lynx

NGC 2445 is a peculiar ring galaxy in the constellation Lynx. The galaxy lies about 200 million light years away from Earth, which means, given its apparent dimensions, that NGC 2445 is approximately 100,000 light years across. It was discovered by Édouard Stephan on January 18, 1877. The galaxy interacts with another galaxy, NGC 2444, and as a result its shape is distorted and new stars are formed.

<span class="mw-page-title-main">Haro 2</span> Blue compact galaxy in the constellation Ursa Major

Haro 2 is a blue compact galaxy in the constellation Ursa Major. The galaxy lies about 120 million light years away from Earth based on redshift independent measurements, which means, given its apparent dimensions, that Haro 2 is approximately 45,000 light years across, while redshift indicates a distance of 70 million light years.

References

  1. 1 2 3 4 5 6 7 8 "NASA/IPAC Extragalactic Database". Results for NGC 4670. Retrieved 2024-03-26.
  2. ↑ "Revised NGC Data for NGC 4670". spider.seds.org. Retrieved 30 March 2024.
  3. ↑ Seligman, Courtney. "NGC 4670 (= PGC 17296 = ESO 085-087)". Celestial Atlas. Retrieved 19 November 2018.
  4. 1 2 Cairós, L. M.; Caon, N.; García Lorenzo, B.; Kelz, A.; Roth, M.; Papaderos, P.; Streicher, O. (November 2012). "Mapping luminous blue compact galaxies with VIRUS-P: Morphology, line ratios, and kinematics". Astronomy & Astrophysics. 547: A24. arXiv: 1209.0310 . Bibcode:2012A&A...547A..24C. doi:10.1051/0004-6361/201219598.
  5. 1 2 Hunter, Deidre A.; Van Woerden, Hugo; Gallagher III, John S. (December 1996). "Neutral Hydrogen Observations of the Amorphous Galaxy NGC 4670 at Moderate Spatial Resolution". The Astrophysical Journal Supplement Series. 107 (2): 739–746. Bibcode:1996ApJS..107..739H. doi:10.1086/192379.
  6. ↑ G. Haro (1956). "Preliminary note on blue galaxies with nuclear emission". Astronomical Journal. 1: 178. Bibcode:1956AJ.....61R.178H. doi: 10.1086/107409 .
  7. ↑ Kumari, Nimisha; James, Bethan L; Irwin, Mike J; Amorín, Ricardo; Pérez-Montero, Enrique (21 May 2018). "O/H-N/O: the curious case of NGC 4670". Monthly Notices of the Royal Astronomical Society. 476 (3): 3793–3815. doi:10.1093/mnras/sty402.
  8. ↑ Latimer, Lilikoi J.; Reines, Amy E.; Plotkin, Richard M.; Russell, Thomas D.; Condon, James J. (1 October 2019). "An X-Ray + Radio Search for Massive Black Holes in Blue Compact Dwarf Galaxies". The Astrophysical Journal. 884 (1): 78. arXiv: 1907.12585 . Bibcode:2019ApJ...884...78L. doi: 10.3847/1538-4357/ab3289 .
  9. ↑ Makarov, Dmitry; Karachentsev, Igor (21 April 2011). "Galaxy groups and clouds in the local (z~ 0.01) Universe". Monthly Notices of the Royal Astronomical Society. 412 (4): 2498–2520. arXiv: 1011.6277 . Bibcode:2011MNRAS.412.2498M. doi:10.1111/j.1365-2966.2010.18071.x. S2CID   119194025. Archived from the original on 31 January 2016. Retrieved 20 March 2017.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.