NGC 3941

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NGC 3941
NGC3941 - SDSS DR14.jpg
SDSS image of NGC 3941
Observation data (J2000 epoch)
Constellation Ursa Major
Right ascension 11h 52m 55.4s [1]
Declination +36° 59′ 11″ [1]
Redshift 930 ± 5 km/s [1]
Distance 39 ± 11 Mly (12.1 ± 3.5 Mpc) [1]
Apparent magnitude  (V)10.3
Characteristics
Type SB(s)0^0^ [1]
Apparent size  (V)3.5′ × 2.3′ [1]
Notable features Seyfert galaxy
Other designations
UGC 6857, MCG +06-26-051, PGC 37235 [1]

NGC 3941 is a barred lenticular galaxy located in the constellation Ursa Major. It is located at a distance of circa 40 million light years from Earth, which, given its apparent dimensions, means that NGC 3941 is about 40,000 light years across. It was discovered by William Herschel in 1787.

Contents

Characteristics

The galaxy has a counterrotating extended gas disk, which was possibly formed by a galaxy merger of accretion of gas with oppositely directed angular momentum. The disk has low velocity dispersion throughout, which suggests it has settled into equilibrium. [2] The gas is found primarily in two rings. The inner appears almost circular in HI imaging, which may mean it is inclined ~20° or more with respect to the stellar disk, whereas the outer ring has approximately the same ellipticity with the stellar disk. The stellar disk is symmetric and there are evidence of weak spiral arms outside the primary bar. [3] In the infrared Ks-band, the bar has ansae-type morphology and in the inner elliptical there is an inner disc showing two-armed spirals. [4] Based on the fact that the spiral arms and the gas are rotating in different directions it has been suggested that the inner ionised gas and the outer HI gas are inclined, almost perpendicular to the stellar disk. The galaxy features also a secondary bar. [3]

NGC 3941 is type 2 Seyfert galaxy. In the centre of the galaxy lies a supermassive black hole whose mass is estimated to be, based on velocity dispersion, 141 million (108.14) M☉. [5]

One supernova has been observed in NGC 3941: SN 2018pv (Type Ia, mag 12.7). [6]

Nearby galaxies

NGC 3941 forms a small galaxy group with NGC 3930 and UGC 6955, which is part of the Ursa Major Cluster. [7]

Related Research Articles

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

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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">NGC 2985</span> Galaxy in the constellation Ursa Major

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<span class="mw-page-title-main">NGC 2974</span> Galaxy in the constellation Sextans

NGC 2974 is a lenticular galaxy located in the constellation Sextans. It is located at a distance of circa 90 million light years from Earth, which, given its apparent dimensions, means that NGC 2974 is about 90,000 light years across. It was discovered by William Herschel on January 6, 1785. NGC 2974 is located in the sky about 2 and a half degrees south-south east of Iota Hydrae and more than 6 degrees northeast of Alphard. A 10th magnitude star lies next to the galaxy, thus making it a challenging object at low magnifications. NGC 2974 is part of the Herschel 400 Catalogue.

<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.

References

  1. 1 2 3 4 5 6 7 "NASA/IPAC Extragalactic Database". Results for NGC 3941. Retrieved 2016-01-18.
  2. ↑ Fisher, David (March 1997). "Kinematic Profiles of SO Galaxies". The Astronomical Journal. 113: 950. Bibcode:1997AJ....113..950F. doi: 10.1086/118312 .
  3. 1 2 Erwin, Peter; Sparke, Linda S. (June 2003). "An Imaging Survey of Early-Type Barred Galaxies". The Astrophysical Journal Supplement Series. 146 (2): 299–352. arXiv: astro-ph/0212092 . Bibcode:2003ApJS..146..299E. doi:10.1086/367885. S2CID   11835132.
  4. ↑ Laurikainen, Eija; Salo, Heikki; Buta, Ronald (1 September 2005). "Multicomponent decompositions for a sample of S0 galaxies". Monthly Notices of the Royal Astronomical Society. 362 (4): 1319–1347. arXiv: astro-ph/0508097 . Bibcode:2005MNRAS.362.1319L. doi: 10.1111/j.1365-2966.2005.09404.x . S2CID   15159305.
  5. ↑ Panessa, F.; Bassani, L.; Cappi, M.; Dadina, M.; Barcons, X.; Carrera, F. J.; Ho, L. C.; Iwasawa, K. (31 July 2006). "On the X-ray, optical emission line and black hole mass properties of local Seyfert galaxies". Astronomy & Astrophysics. 455 (1): 173–185. arXiv: astro-ph/0605236 . Bibcode:2006A&A...455..173P. doi:10.1051/0004-6361:20064894. S2CID   5769000.
  6. ↑ Transient Name Server entry for SN 2018pv. Retrieved 5 January 2023.
  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.


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