NGC 3741

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NGC 3741
NGC 3741.png
Hubble Space Telescope image of NGC 3741
Observation data (J2000 epoch)
Constellation Ursa Major
Right ascension 11h 36m 05s [1]
Declination +45° 17′ 02″ [1]
Redshift 0.000764 [2]
Heliocentric radial velocity 229 ± 4 km/s [2]
Distance 10  Mly (3.2  Mpc) [3]
Apparent magnitude  (V)14.23 [1]
Apparent magnitude  (B)14.55 [1]
Characteristics
Type ImIII/BCD [2]
Other designations
NGC 3741, UGC 6572, MCG +08-21-068, PGC 35878, SDSS J113605.75+451702.9 [1]

NGC 3741 is an irregular galaxy in the constellation Ursa Major. It was discovered by John Herschel on March 19, 1828. [4] At a distance of about 10 million light-years (3.2 Mpc), it is located in the M94 Group. [3] It is relatively undisturbed by other galaxies. [3]

NGC 3741 is an unusual galaxy in several aspects. It has a disk of neutral hydrogen (H I) that is extremely wide, extending some 23,000 light-years (7 kpc). The disk is strongly but symmetrically warped. [5] With a mass-to-light ratio of MT/LB ~ 149, it is highly rich in dark matter. [6]

NGC 3741 has a central bar and a faint spiral arm rich in H I. The bar rotates slowly, likely due to interaction with the dark matter. [7] The bar and spiral arms would make NGC 3741 a low-luminosity spiral galaxy. [3] The unusual properties could be explained if NGC 3741 were a late-stage merger between a low-mass companion or if it accreted mass from the intergalactic medium. [3]

Related Research Articles

<span class="mw-page-title-main">Galaxy rotation curve</span> Observed discrepancy in galactic angular momenta

The rotation curve of a disc galaxy is a plot of the orbital speeds of visible stars or gas in that galaxy versus their radial distance from that galaxy's centre. It is typically rendered graphically as a plot, and the data observed from each side of a spiral galaxy are generally asymmetric, so that data from each side are averaged to create the curve. A significant discrepancy exists between the experimental curves observed, and a curve derived by applying gravity theory to the matter observed in a galaxy. Theories involving dark matter are the main postulated solutions to account for the variance.

<span class="mw-page-title-main">Messier 110</span> Satellite galaxy of the Andromeda Galaxy

Messier 110, or M110, also known as NGC 205, is a dwarf elliptical galaxy that is a satellite of the Andromeda Galaxy in the Local Group.

<span class="mw-page-title-main">Andromeda IV</span> Isolated irregular dwarf galaxy in the constellation of Andromeda

Andromeda IV is an isolated irregular dwarf galaxy. The moderate surface brightness, a very blue color, low current star formation rate and low metallicity are consistent with it being a small (background) dwarf irregular galaxy, perhaps similar to Local Group dwarfs such as IC 1613 and Sextans A. Arguments based on the observed radial velocity and the tentative detection of the RGB tip suggest that it lies well outside the confines of the Local Group.

<span class="mw-page-title-main">NGC 2859</span> Galaxy in the constellation Leo Minor

NGC 2859 is a barred lenticular galaxy located some 83 million light years away in the constellation Leo Minor. The morphological classification is (R)SB(r)0+, where the S0+ notation indicates a well-defined physical structure that is lacking in visible spiral arms. It has a strong bar (B) of the "ansae" type, which means it grows brighter or wider toward the tips. A faint, secondary bar is positioned at nearly a right angle to the main bar. These features are surrounded by a weak inner ring (r) that appears diffuse. The outer region of the galaxy hosts a prominent, detached ring (R) that includes a series of blue-hued knots along the eastern side.

<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 1003</span> Galaxy in the constellation Perseus

NGC 1003 is a spiral galaxy at the western edge of the Perseus constellation. It is located at a distance of about 36 million light years from the Milky Way and is receding with a heliocentric radial velocity of 624 km/s. This galaxy was discovered by the Anglo-German astronomer William Herschel on October 6, 1784, who described it as "pretty faint, large, extended 90°±, much brighter middle, mottled but not resolved". It is a member of the NGC 1023 group of galaxies.

<span class="mw-page-title-main">NGC 5643</span> Galaxy in the constellation Lupus

NGC 5643 is an intermediate spiral galaxy in the constellation Lupus. Based on the tip of the red-giant branch distance indicator, it is located at a distance of about 40 million light-years. NGC 5643 has an active galactic nucleus and is a type II Seyfert 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 4111</span> Galaxy in constellation Canes Venatici

NGC 4111 is a lenticular galaxy in the constellation Canes Venatici. It is located at a distance of circa 50 million light-years from Earth, which, given its apparent dimensions, means that NGC 4111 is about 55,000 light-years across. It was discovered by William Herschel in 1788. NGC 4111 possesses both thin and thick discs.

<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 4596</span> Galaxy in the constellation Virgo

NGC 4596 is a barred lenticular galaxy located about 55 million light-years away in the constellation Virgo. NGC 4596 was discovered by astronomer William Herschel on March 15, 1784. NGC 4596 is a member of the Virgo Cluster and has an inclination of about 38°.

<span class="mw-page-title-main">NGC 720</span> Galaxy in the constellation Cetus

NGC 720 is an elliptical galaxy located in the constellation Cetus. It is located at a distance of circa 80 million light years from Earth, which, given its apparent dimensions, means that NGC 720 is about 110,000 light years across. It was discovered by William Herschel on October 3, 1785. The galaxy is included in the Herschel 400 Catalogue. It lies about three and a half degrees south and slightly east from zeta Ceti.

<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 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 4299</span> Spiral galaxy in the constellation Virgo

NGC 4299 is a featureless spiral galaxy located about 55 million light-years away in the constellation Virgo. It was discovered by astronomer William Herschel on March 15, 1784 and is a member of the Virgo Cluster.

<span class="mw-page-title-main">NGC 6789</span> Irregular galaxy in the constellation Draco

NGC 6789 is a void irregular galaxy in the constellation Draco. It was discovered by Lewis Swift on Aug 30, 1883. It is located within the Local Void, a region of space with far fewer galaxies than its surroundings.

<span class="mw-page-title-main">NGC 4312</span> Galaxy in the constellation Coma Berenices

NGC 4312 is an edge-on unbarred spiral galaxy located about 55 million light-years away in the constellation Coma Berenices. It was discovered by astronomer William Herschel on January 14, 1787. NGC 4312 is a member of the Virgo Cluster and is a LINER galaxy.

<span class="mw-page-title-main">NGC 4313</span> Spiral galaxy in the constellation Virgo

NGC 4313 is an edge-on spiral galaxy located about 50 million light-years away in the constellation Virgo. It was discovered by astronomer William Herschel on March 15, 1784. NGC 4313 is a member of the Virgo Cluster and is classified as LINER and as a Seyfert galaxy.

<span class="mw-page-title-main">NGC 4324</span> Galaxy in the constellation of Virgo

NGC 4324 is a lenticular galaxy located about 85 million light-years away in the constellation Virgo. It was discovered by astronomer Heinrich d'Arrest on March 4, 1862. NGC 4324 has a stellar mass of 5.62 × 1010M☉, and a baryonic mass of 5.88 × 1010M☉. The galaxy's total mass is around 5.25 × 1011M☉. NGC 4324 is notable for having a ring of star formation surrounding its nucleus. It was considered a member of the Virgo II Groups until 1999, when its distance was recalculated and it was placed in the Virgo W Group.

<span class="mw-page-title-main">NGC 4393</span> Galaxy in the constellation of Coma Berenices

NGC 4393 is a spiral galaxy about 46 million light-years away in the constellation Coma Berenices. It was discovered by astronomer William Herschel on April 11, 1785. It is a member of the NGC 4274 Group, which is part of the Coma I Group or Cloud.

References

  1. 1 2 3 4 5 "NGC 3741". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 22 May 2019.
  2. 1 2 3 "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 2018-12-27.
  3. 1 2 3 4 5 Annibali, F.; Bacchini, C.; Iorio, G.; Bellazzini, M.; Pascale, R.; Beccari, G.; Cignoni, M.; Ciotti, L.; Nipoti, C.; Sacchi, E.; Tosi, M.; Cusano, F.; Bisogni, S.; Gargiulo, A.; Paris, D. (2022). "The Smallest Scale of Hierarchy Survey (SSH) – II. Extended star formation and bar-like features in the dwarf galaxy NGC 3741: Recent merger or ongoing gas accretion?". Monthly Notices of the Royal Astronomical Society. 512 (2): 1781–1794. arXiv: 2202.11734 . Bibcode:2022MNRAS.512.1781A. doi: 10.1093/mnras/stac541 .
  4. ↑ Seligman, Courtney. "New General Catalog Objects: NGC 3700 - 3749". cseligman.com. Retrieved 23 May 2019.
  5. ↑ Gentile, G.; Salucci, P.; Klein, U.; Granato, G. L. (2007). "NGC 3741: The dark halo profile from the most extended rotation curve". Monthly Notices of the Royal Astronomical Society. 375 (1): 199–212. arXiv: astro-ph/0611355 . Bibcode:2007MNRAS.375..199G. doi: 10.1111/j.1365-2966.2006.11283.x . S2CID   18818325.
  6. ↑ Begum, Ayesha; Chengalur, Jayaram N.; Kennicutt, Robert C.; Karachentsev, Igor D.; Lee, Janice C. (2007). "Life in the last lane: Star formation and chemical evolution in an extremely gas rich dwarf". Monthly Notices of the Royal Astronomical Society. 383 (2): 809–816. arXiv: 0711.1588 . Bibcode:2008MNRAS.383..809B. doi: 10.1111/j.1365-2966.2007.12592.x . S2CID   16348749.
  7. ↑ Banerjee, Arunima; Patra, Narendra Nath; Chengalur, Jayaram N.; Begum, Ayesha (2013). "A slow bar in the dwarf irregular galaxy NGC 3741". Monthly Notices of the Royal Astronomical Society. 434 (2): 1257–1263. arXiv: 1308.3029 . Bibcode:2013MNRAS.434.1257B. doi: 10.1093/mnras/stt1083 .
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