NGC 2782

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NGC 2782
NGC 2782 hst 06673 11134 R814GB555B606.png
NGC 2782 by Hubble Space Telescope
Observation data (J2000 epoch)
Constellation Lynx
Right ascension 08h 53m 32.7s [1]
Declination 51° 18′ 49″ [1]
Redshift 2543 ± 2 km/s [1]
Distance 76 ±34 Mly (23.4±10.6 Mpc) [1]
Apparent magnitude  (V)12.3
Characteristics
Type SAB(rs)a [1]
Apparent size  (V)3.5′ × 2.6′ [1]
Other designations
UGC 4862, Arp 215, MCG +07-19-036, PGC 26034, 6C B091051.3+401928 [1]

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.

Contents

Structure

NGC 2782 by GALEX NGC 2782GALEX.jpg
NGC 2782 by GALEX

Active galactic nucleus

The nucleus and circumnuclear region of NGC 2782 display starburst activity, with bar of the galaxy providing gas to the nucleus. [2] The active galactic nucleus is hidden by a compact high-column-density absorber and a H2O maser is associated with it. [3] The vigorous star formation creates an unusual "superwind" of out-flowing gas, which has been detected in X-rays as a bubble like structure, approximately 7 arcsec south of the central region of the galaxy. [4] A similar bubble can be seen in radiowaves at the north side. [3] There is also diffuse X-rays emission. The nucleus of NGC 2782 is a low luminosity active galactic nucleus. [4]

Tidal tails

NGC 2782 shows two tidal tails, extending in opposite directions. As depicted in HI imaging, a plume extends about 5 arcmin toward the northwest, with an estimated mass of 1.4×109 M☉ of atomic hydrogen, accounting for about 40 percent of the total HI mass of the system. A shorter HI plume extending toward the east has been associated with the stellar tail which extends 2.7 arcmin toward the east in the optical images. The northwest tail is fainter in the optical spectrum. [5] CO was detected in the eastern tail, underlying the presence of molecular gas and HII regions in the region, with total mass of 6×108 M☉ or even more. There is star formation activity in the eastern tail. [6] In the western tail, 7 UV sources have been detected. These stellar populations are 1 to 11 million years old. Three of them have high metallicity, similar to that of the nucleus of the galaxy. [7]

Ultraluminous X-ray sources

Via observations by the Chandra X-ray Observatory, 27 X-ray point sources, of which 13 are ultraluminous X-ray sources (without counting the central one), were observed near the nucleus and are likely associated with the galaxy. This number is unusually high for a galaxy, although ultraluminous X-ray sources are common in starburst galaxies. Sixteen of these sources have a visual counterpart. [4]

Supernovae

Two supernovae have been observed in NGC 2782. On 24 December, 1994, Reiki Kushida discovered SN 1994ak (Type IIn, mag. 16). [8] On 20 August, 2020, Quanzhi Ye and Xing Gao discovered SN 2020scc (Type Ia, mag. 13.7). [9]

Nearby galaxies

NGC 2782 is the largest galaxy in a small group of four galaxies. Nearby galaxies include UGC 4867 and UGC 4871 and further away lie NGC 2785 and UGC 4889. [10]

Related Research Articles

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<span class="mw-page-title-main">NGC 7319</span> Galaxy in the constellation Pegasus

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<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 3169</span> Galaxy in the constellation Sextans

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<span class="mw-page-title-main">NGC 4666</span> Spiral galaxy in the constellation Virgo

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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 5643</span> Galaxy in the constellation Lupus

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<span class="mw-page-title-main">NGC 7130</span> Galaxy in the constellation Piscis Austrinus

NGC 7130 is a spiral galaxy located in the constellation Piscis Austrinus. It is located at a distance of about 220 million light years from Earth, which, given its apparent dimensions, means that NGC 7130 is about 100,000 light years across. It was discovered by John Herschel on September 25, 1834, and discovered independently by Lewis Swift on September 17, 1897. The location of the galaxy given in the New General Catalogue was off by 30 arcminutes in declination from the location of the galaxy.

<span class="mw-page-title-main">NGC 1380</span> Galaxy in the constellation Fornax

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

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<span class="mw-page-title-main">IC 1459</span> Elliptical galaxy in the constellation of Grus

IC 1459 is an elliptical galaxy located in the constellation Grus. It is located at a distance of circa 85 million light-years from Earth, which, given its apparent dimensions, means that IC 1459 is about 130,000 light-years across. It was discovered by Edward Emerson Barnard in 1892.

<span class="mw-page-title-main">UGC 5101</span> Galaxy in the constellation of Ursa Major

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<span class="mw-page-title-main">NGC 5135</span> Galaxy in the constellation Hydra

NGC 5135 is a barred spiral galaxy located in the constellation Hydra. It is located at a distance of about 200 million light years from Earth. It was discovered by John Herschel on May 8, 1834. It is a Seyfert galaxy.

<span class="mw-page-title-main">NGC 3396</span> Galaxy in the constellation Leo Minor

NGC 3396 is a peculiar barred irregular galaxy in the constellation Leo Minor. The galaxy lies about 80 million light years away from Earth, which means, given its apparent dimensions, that NGC 3396 is approximately 85,000 light years across. It was discovered by William Herschel on December 7, 1785.

<span class="mw-page-title-main">IRAS 19254-7245</span> Galaxy in the constellation Pavo

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References

  1. 1 2 3 4 5 6 7 "NASA/IPAC Extragalactic Database". Results for NGC 2782. Retrieved 2016-01-18.
  2. ↑ Alvarez-Alvarez, M.; Diaz, A. I.; Terlevich, E.; Terlevich, R. (22 June 2015). "A comprehensive photometric study of circumnuclear star-forming rings - I. The sample". Monthly Notices of the Royal Astronomical Society. 451 (3): 3173–3191. arXiv: 1311.1653 . Bibcode:2015MNRAS.451.3173A. doi: 10.1093/mnras/stv1123 . S2CID   119281383.
  3. 1 2 Zhang, J. S.; Henkel, C.; Kadler, M.; Greenhill, L. J.; Nagar, N.; Wilson, A. S.; Braatz, J. A. (May 2006). "Extragalactic H2O masers and X-ray absorbing column densities". Astronomy and Astrophysics. 450 (3): 933–944. arXiv: astro-ph/0512459 . Bibcode:2006A&A...450..933Z. doi:10.1051/0004-6361:20054138. S2CID   18160300.
  4. 1 2 3 Bravo-Guerrero, Jimena; Stevens, Ian R. (10 February 2017). "Superwind evolution: the young starburst-driven wind galaxy NGC 2782". Monthly Notices of the Royal Astronomical Society. 467 (4): 3788. arXiv: 1702.03282 . Bibcode:2017MNRAS.467.3788B. doi: 10.1093/mnras/stx327 . S2CID   118041174.
  5. ↑ Smith, Beverly J. (September 1991). "The discovery of a long H I plume near the peculiar galaxy NGC 2782 (ARP 215)". The Astrophysical Journal. 378: 39–46. Bibcode:1991ApJ...378...39S. doi:10.1086/170405.
  6. ↑ Smith, Beverly J.; Struck, Curtis; Kenney, Jeffrey D. P.; Jogee, Shardha (March 1999). "The Molecule-rich Tail of the Peculiar Galaxy NGC 2782 (Arp 215)". The Astronomical Journal. 117 (3): 1237–1248. arXiv: astro-ph/9811239 . Bibcode:1999AJ....117.1237S. doi:10.1086/300785. S2CID   8556287.
  7. ↑ Torres-Flores, S.; de Oliveira, C. Mendes; de Mello, D. F.; Scarano, S.; Urrutia-Viscarra, F. (21 April 2012). "NGC 2782: a merger remnant with young stars in its gaseous tidal tail". Monthly Notices of the Royal Astronomical Society. 421 (4): 3612–3621. arXiv: 1201.3927 . Bibcode:2012MNRAS.421.3612T. doi: 10.1111/j.1365-2966.2012.20589.x . S2CID   78089897.
  8. ↑ Transient Name Server entry for SN 1994ak. Retrieved 22 March 2023.
  9. ↑ Transient Name Server entry for SN 2020scc. Retrieved 22 March 2023.
  10. ↑ 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.
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