IC 2531

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IC 2531
IC 2531 DSS.jpg
The edge-on spiral galaxy IC 2531.
Observation data (J2000 epoch)
Constellation Antlia
Right ascension 09h 59m 55.50s
Declination −29° 37′ 03.2″
Redshift 0.008246
Heliocentric radial velocity 2,472 km/s
Distance 133 Mly (40.77 Mpc)
Apparent magnitude  (V)0.27
Apparent magnitude  (B)0.35
Surface brightness 13.54
Characteristics
Type Sb, HII
Size∼283,000 ly (estimated)
Apparent size  (V)7.50' x 0.90'
Other designations
PGC 28909, ESO 435-G025, MCG -05-24-015, AM 0957-292, "little N 891"

IC 2531 is an edge-on spiral galaxy located in the constellation of Antlia. It is located 130 million light years from Earth. [1] It was discovered in February 1898, by the American astronomer Lewis Swift. [2] The galaxy has been called by its nickname "little N 891" because of its resemblance to another edge-on spiral, NGC 891. However IC 2531 is twice as large. [3]

Contents

IC 2531 contains a broad HI line. In addition, it has a luminosity class of III and regions of ionized hydrogen. [1]

Characteristics

IC 2531 is classified a late-type galaxy with a projected megaparsec of 36.8. [4] It has an Sb morphological classification. [5] It is seen edge-on and contains a dust lane found separating its main body into two equal components. [4] It has a presence of filamentary features reaching its galactic halo [6] and high circular velocity of vmax = 260.5 km−1. [5] IC 2531 also contains a low far-infrared flux expecting a relatively low contamination of disk light by its young star population. [7]

What is striking about IC 2531, is the fact that its galactic budge has a peculiar box/peanut-shaped structure. [5] [4] Through analyzations of its atomic hydrogen (HI) content as part of the Herschel observations, [8] a total mass of 1.37 x 1010 MΘ was calculated. The galaxy is also shown to have both its HI and stellar disc extending towards the northeast side. It is found having outer regions slightly wrapped along its line of sight and the plane of the sky with both inclination and position angles straying 4 degrees. [4] Furthermore, IC 2531 shows a protruding spiral arm in its disk. [8] [4]

NGC 3054 group

IC 2531 is a member of the NGC 3054 group. There are nine members in the group besides IC 2531 and NGC 3054 including NGC 3051, NGC 3078, NGC 3084, NGC 3089, IC 2537 and two other galaxies from the European Southern Observatory Catalog namely ESO 499-26 and ESO 499–325. IC 2531 is the largest member. [9]

Related Research Articles

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<span class="mw-page-title-main">NGC 6340</span> Galaxy in the constellation Draco

NGC 6340 is an unbarred spiral galaxy in the northern constellation of Draco. It was discovered by German-British astronomer William Herschel on June 6, 1788. The galaxy is located approximately 55 million light-years (17 Mpc) away, and is receding with a heliocentric radial velocity of 1,217 km/s. It is the largest member of a triplet of galaxies known as the NGC 6340 group.

<span class="mw-page-title-main">NGC 672</span> Galaxy in the constellation Triangulum

NGC 672 is a spiral galaxy in the northern constellation of Triangulum, positioned around 2° to the southwest of the star Alpha Trianguli. The original object designated NGC 672 was discovered by the German-born astronomer William Herschel on 26 October 1786, but this was later cataloged as NGC 614. The object now identified as NGC 672 was discovered by John Herschel on 11 November 1827.

<span class="mw-page-title-main">NGC 1003</span> Galaxy in the constellation Perseus

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<span class="mw-page-title-main">NGC 7013</span> Spiral or lenticular galaxy in the constellation Cygnus

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<span class="mw-page-title-main">NGC 3883</span> Galaxy in the constellation Leo

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

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<span class="mw-page-title-main">NGC 765</span> Galaxy in the constellation Aries

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<span class="mw-page-title-main">NGC 4294</span> Galaxy in the constellation Virgo

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<span class="mw-page-title-main">NGC 4298</span> Galaxy in the constellation Coma Berenices

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<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 4302</span> Galaxy in the constellation Coma Berenices

NGC 4302 is an edge-on spiral galaxy located about 55 million light-years away in the constellation Coma Berenices. It was discovered by astronomer William Herschel on April 8, 1784 and is a member of the Virgo Cluster.

<span class="mw-page-title-main">NGC 4305</span> Dwarf spiral galaxy in the constellation Virgo

NGC 4305 is a dwarf spiral galaxy located about 100 million light-years away in the constellation Virgo. The galaxy was discovered by astronomer John Herschel on May 2, 1829. Although considered to be a member of the Virgo Cluster, its high radial velocity and blue luminosity suggest it is in fact a background galaxy. The galaxy has a nearby major companion; NGC 4306.

<span class="mw-page-title-main">NGC 1369</span> Galaxy of the Fornax Cluster

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<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 5719</span> Intermediate spiral galaxy in the constellation Virgo

NGC 5719 is an intermediate or barred spiral galaxy located in the constellation Virgo. It is located at a distance of 94 million light years from Earth. It was first discovered by William Herschel in April 1787, but also observed by John Herschel in April 1828 and by George Phillips Bond in March 1853, who catalogued the object as NGC 5658 under the New General Catalogue.

References

  1. 1 2 "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-09-21.
  2. ↑ "Index Catalog Objects: IC 2500 - 2549". cseligman.com. Retrieved 2024-09-21.
  3. ↑ "Data from Revised NGC/IC catalogue". astrovalleyfield.ca. Retrieved 2024-09-21.
  4. 1 2 3 4 5 Mosenkov, Aleksandr V.; Allaert, Flor; Baes, Maarten; Bianchi, Simone; Camps, Peter; De Geyter, Gert; De Looze, Ilse; Fritz, Jacopo; Gentile, Gianfranco; Hughes, Thomas M.; Lewis, Fraser; Verstappen, Joris; Verstocken, Sam; Viaene, Sébastien (2016-07-28). "HERschelObservations of Edge-on Spirals (HEROES) III. Dust Energy Balance of IC 2531". Astronomy & Astrophysics. 592: A71. arXiv: 1605.06239 . doi:10.1051/0004-6361/201628676. ISSN   0004-6361.
  5. 1 2 3 Peters, S. P. C.; de Geyter, G.; van der Kruit, P. C.; Freeman, K. C. (2016-10-15). "The shape of dark matter haloes – IV. The structure of stellar discs in edge-on galaxies". Monthly Notices of the Royal Astronomical Society. 464 (1): 48–64. arXiv: 1608.05563 . doi: 10.1093/mnras/stw2100 . ISSN   0035-8711.
  6. ↑ Rossa, J.; Dettmar, R. -J. (2000-07-01). "Extraplanar diffuse ionized gas in a small sample of nearby edge-on galaxies". Astronomy and Astrophysics. 359: 433–446. arXiv: astro-ph/0006301 . Bibcode:2000A&A...359..433R. ISSN   0004-6361.
  7. ↑ Wainscoat, R. J.; Freeman, K. C.; Hyland, A. R. (1989-02-01). "The Optical and Near-Infrared Distribution of Light in the Edge-on Galaxy IC 2531". The Astrophysical Journal. 337: 163. Bibcode:1989ApJ...337..163W. doi:10.1086/167096. ISSN   0004-637X.
  8. 1 2 Allaert, F.; Gentile, G.; Baes, M.; De Geyter, G.; Hughes, T. M.; Lewis, F.; Bianchi, S.; De Looze, I.; Fritz, J.; Holwerda, B. W.; Verstappen, J.; Viaene, S. (2015-10-01). "HERschel Observations of Edge-on Spirals (HEROES). II. Tilted-ring modelling of the atomic gas disks". Astronomy and Astrophysics. 582: A18. arXiv: 1507.03095 . Bibcode:2015A&A...582A..18A. doi:10.1051/0004-6361/201526667. ISSN   0004-6361.
  9. ↑ Garcia, A. M. (1993-07-01). "General study of group membership. II. Determination of nearby groups". Astronomy and Astrophysics Supplement Series. 100: 47–90. Bibcode:1993A&AS..100...47G. ISSN   0365-0138.
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