NGC 7741

Last updated
NGC 7741
N7741s.jpg
NGC 7741 by the 32-inch Schulman Telescope at Mount Lemmon Observatory
Observation data (J2000 epoch)
Constellation Pegasus
Right ascension 23h 43m 54.4s [1]
Declination +26° 04′ 32″ [1]
Redshift 0.002502 ± 0.000001 [1]
Heliocentric radial velocity 750 ± 0 km/s [1]
Distance 41.2 ± 6.9 Mly (12.6 ± 2.1 Mpc) [1]
Apparent magnitude  (V)11.0
Characteristics
Type SB(s)cd [1]
Apparent size  (V)4.4′ × 3.0′ [1]
Other designations
UGC 12754, CGCG 476-125, MCG +04-55-050, PGC 72237 [1]

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. [2]

Contents

NGC 7741 has a strong bar and two spiral arms. The spiral arms are patchy and diffuse and their inner part forms a pseudoring. [3] There are numerous HII regions along the bar and the spiral arms, and a total number of 10 HII region complexes have been observed, with radius 6 arcseconds. They have ages between 5 and 9 million years. [4] The star formation rate in the central region of NGC 7741 is 0.022 M☉ per year per square kpc. [5] The total stellar mass of NGC 7741 is estimated to be 1.69×109 M☉. [6]

NGC 7741 belongs to a small galaxy group known as the NGC 7741 group. Other members of the group are the galaxies UGC 12732, and UGC 12791. [7]

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<span class="mw-page-title-main">NGC 877</span> Galaxy located in the constellation Aries

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

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<span class="mw-page-title-main">NGC 4800</span> Galaxy in constellation Canes Venatici

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<span class="mw-page-title-main">NGC 1241</span> Galaxy in the constellation Eridanus

NGC 1241 is a spiral galaxy located in the constellation Eridanus. It is located at a distance of circa 150 million light years from Earth, which, given its apparent dimensions, means that NGC 1241 is about 140,000 light years across. It was discovered by William Herschel on January 10, 1785. It is classified as a Seyfert galaxy.

References

  1. 1 2 3 4 5 6 7 8 "NASA/IPAC Extragalactic Database". Results for NGC 7741. Retrieved 2016-01-18.
  2. ↑ Seligman, Courtney. "NGC 7741 (= PGC 72237)". Celestial Atlas. Retrieved 19 November 2018.
  3. ↑ Eskridge, Paul B.; Frogel, Jay A.; Pogge, Richard W.; Quillen, Alice C.; Berlind, Andreas A.; Davies, Roger L.; DePoy, D. L.; Gilbert, Karoline M.; Houdashelt, Mark L.; Kuchinski, Leslie E.; Ramirez, Solange V.; Sellgren, K.; Stutz, Amelia; Terndrup, Donald M.; Tiede, Glenn P. (November 2002). "Near-Infrared and Optical Morphology of Spiral Galaxies". The Astrophysical Journal Supplement Series. 143 (1): 73–111. arXiv: astro-ph/0206320 . Bibcode:2002ApJS..143...73E. doi:10.1086/342340. S2CID   15491635.
  4. ↑ Khramtsova, M. S.; Wiebe, D. S.; Lozinskaya, T. A.; Egorov, O. V. (October 2014). "Optical and infrared emission of H ii complexes as a clue to the PAH life cycle". Monthly Notices of the Royal Astronomical Society. 444 (1): 757–775. arXiv: 1407.8307 . Bibcode:2014MNRAS.444..757K. doi:10.1093/mnras/stu1482. S2CID   118527414.
  5. ↑ Tsai, Mengchun; Hwang, Chorng-Yuan (14 July 2015). "Star formation in the central regions of active and normal galaxies". The Astronomical Journal. 150 (2): 43. Bibcode:2015AJ....150...43T. doi: 10.1088/0004-6256/150/2/43 .
  6. ↑ Font, J.; Beckman, J. E.; Martínez-Valpuesta, I.; Borlaff, A. S.; James, P. A.; Díaz-García, S.; García-Lorenzo, B.; Camps-Fariña, A.; Gutiérrez, L.; Amram, P. (2 February 2017). "Kinematic Clues to Bar Evolution for Galaxies in the Local Universe: Why the Fastest Rotating Bars are Rotating Most Slowly". The Astrophysical Journal. 835 (2): 279. arXiv: 1702.01743 . Bibcode:2017ApJ...835..279F. doi: 10.3847/1538-4357/835/2/279 . S2CID   55782342.
  7. ↑ 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 29 December 2018.
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