IC 1481

Last updated
IC 1481
IC1481 - SDSS DR14.jpg
IC 1481 captured by SDSS
Observation data (J2000 epoch)
Constellation Pisces
Right ascension 23h 19m 25.1234s
Declination +05° 54′ 22.243″
Redshift 0.020331
Heliocentric radial velocity 6,095 km/s
Distance 289 Mly (88.60 Mpc)
Apparent magnitude  (V)0.25
Apparent magnitude  (B)0.33
Characteristics
Type Sb, LINER
Size65,000 ly
Apparent size  (V)0.8' x 0.7'
Other designations
IRAS 23168+0537, UGC 12505, PGC 71070, CGCG 406-064

IC 1481 is a spiral galaxy located in the Pisces constellation. It is located 289 million light years from Earth [1] and was discovered by Austrian astronomer, Rudolf Spitaler on October 6, 1891. [2] The galaxy has an approximate diameter of 65,000 light years with a surface brightness of 12.8 square arcmin. [3]

According to an optical image, IC 1481 has an Sb morphological classification. [4] The galaxy also contains an active galactic nucleus (AGN). It is classified as a LINER galaxy. [5] [6] showing an extensive narrow-line region. The region of IC 1481 has bright portions forming in a figure eight pattern and extends at Position Angle (PA) = 50° by ~ 13 arcseconds on both sides of its nucleus. It also show emission knots towards the field edges. [7] The stellar population of IC 1481 shows a post-starburst signature, which the Balmer lines contain strong absorption. [8]

A luminous H2O maser emission is found towards IC 1481. The spectrum of the maser has a narrow and strong feature of 0.15 Jy and FWHM = 2 km s−1. It is also weak and broad. With an isotropic luminosity of L = 320 LΘ, this suggests a megamaser. [4]

The maser features are found distributed, which they contain a velocity gradient. This suggests the AGN of IC 1481 has an unstable molecular gas disk with a mass of (4.3 ± 0.3) x 107 MΘ. The disk is seen edge-on. It has a thickness of 2H = 1.5-4.2 pc and a radius of r = 2.8-14.0 pc making the largest amongst other maser disks observed in other AGNs. Not to mention, the disk has a rotation of Vrot = 124–168 km s−1 and a velocity dispersion measured by △V ≈ 31 km s−1. Further observations found the disk of IC 1481 is huge indicated by its rotation curve being a sub-Keplerian. [4] When compared to the galaxy's black hole mass of <107 MΘ, its mass is higher. [4] [9]

One supernova has been observed in IC 1481: SN 2000ey (type Ia, mag. 16.2). [10] [11]

Related Research Articles

<span class="mw-page-title-main">Seyfert galaxy</span> Class of active galaxies with very bright nuclei

Seyfert galaxies are one of the two largest groups of active galaxies, along with quasar host galaxies. They have quasar-like nuclei with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable.

<span class="mw-page-title-main">Messier 106</span> Galaxy in the constellation Canes Venatici

Messier 106 is an intermediate spiral galaxy in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781. M106 is at a distance of about 22 to 25 million light-years away from Earth. M106 contains an active nucleus classified as a Type 2 Seyfert, and the presence of a central supermassive black hole has been demonstrated from radio-wavelength observations of the rotation of a disk of molecular gas orbiting within the inner light-year around the black hole. NGC 4217 is a possible companion galaxy of Messier 106. Besides the two visible arms, it has two "anomalous arms" detectable using an X-ray telescope.

<span class="mw-page-title-main">Megamaser</span> Astrophysical maser, source of stimulated spectral line emission

A megamaser is a type of astrophysical maser, which is a naturally occurring source of stimulated spectral line emission. Megamasers are distinguished from other astrophysical masers by their large isotropic luminosity. Megamasers have typical luminosities of 103 solar luminosities (L☉), which is 100 million times brighter than masers in the Milky Way, hence the prefix mega. Likewise, the term kilomaser is used to describe masers outside the Milky Way that have luminosities of order L☉, or thousands of times stronger than the average maser in the Milky Way, gigamaser is used to describe masers billions of times stronger than the average maser in the Milky Way, and extragalactic maser encompasses all masers found outside the Milky Way. Most known extragalactic masers are megamasers, and the majority of megamasers are hydroxyl (OH) megamasers, meaning the spectral line being amplified is one due to a transition in the hydroxyl molecule. There are known megamasers for three other molecules: water (H2O), formaldehyde (H2CO), and methine (CH).

<span class="mw-page-title-main">IC 883</span> Irregular galaxy in the constellation Canes Venatici

IC 883 is an irregular galaxy that is about 321 million light years away from Earth. It is located in the constellation Canes Venatici. Its largest radius is 1.4, and smallest 0.7 angular minutes .[b] It was discovered by Rudolf Ferdinand Spitaler on May 1 1891.

<span class="mw-page-title-main">NGC 708</span> Galaxy in the constellation Andromeda

NGC 708 is an elliptical galaxy located 240 million light-years away in the constellation Andromeda and was discovered by astronomer William Herschel on September 21, 1786. It is classified as a cD galaxy and is the brightest member of Abell 262. NGC 708 is a weak FR I radio galaxy and is also classified as a type 2 Seyfert galaxy.

<span class="mw-page-title-main">NGC 7469</span> Galaxy located in the constellation Pegasus

NGC 7469 is an intermediate spiral galaxy in the constellation of Pegasus. NGC 7469 is located about 200 million light-years away from Earth, which means, given its apparent dimensions, that NGC 7469 is approximately 90,000 light-years across. It was discovered by William Herschel on November 12, 1784.

<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 6951</span> Galaxy in the constellation Cepheus

NGC 6951 is a barred spiral galaxy located in the constellation Cepheus. It is located at a distance of about 75 million light-years from Earth, which, given its apparent dimensions, means that NGC 6951 is about 100,000 light-years across. It was discovered by Jérôme Eugène Coggia in 1877 and independently by Lewis Swift in 1878.

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

NGC 1386 is a spiral galaxy located in the constellation Eridanus. It is located at a distance of circa 53 million light years from Earth, which, given its apparent dimensions, means that NGC 1386 is about 50,000 light years across. It is a Seyfert galaxy, the only one in Fornax Cluster.

<span class="mw-page-title-main">NGC 2273</span> Galaxy in the constellation Lynx

NGC 2273 is a barred spiral galaxy located in the constellation Lynx. It is located at a distance of circa 95 million light years from Earth, which, given its apparent dimensions, means that NGC 2273 is about 100,000 light years across. It was discovered by Nils Dunér on September 15, 1867.

<span class="mw-page-title-main">NGC 7679</span> Galaxy in the constellation Pisces

NGC 7679 is a lenticular galaxy with a peculiar morphology in the constellation Pisces. It is located at a distance of about 200 million light years from Earth, which, given its apparent dimensions, means that NGC 7679 is about 60,000 light years across. It was discovered by Heinrich d'Arrest on September 23, 1864. The total infrared luminosity is 1011.05 L☉, and thus it is categorised as a luminous infrared galaxy. NGC 7679 is both a starburst galaxy and a Seyfert galaxy.

<span class="mw-page-title-main">NGC 5506</span> Galaxy in the constellation of Virgo

NGC 5506 is a spiral galaxy located in the constellation Virgo. It is located at a distance of about 75 million light years from Earth, which, given its apparent dimensions, means that NGC 5506 is about 80,000 light years across. It was discovered by William Herschel on April 15, 1787. It is a Seyfert galaxy.

<span class="mw-page-title-main">NGC 4253</span> Galaxy in the constellation of Coma Berenices

NGC 4253 is a barred spiral galaxy located in the constellation Coma Berenices. It is located at a distance of about 185 million light years from Earth, which, given its apparent dimensions, means that NGC 4253 is about 65,000 light years across. It was discovered by William Herschel on February 3, 1788. It is a Seyfert galaxy.

<span class="mw-page-title-main">IC 3528</span> Galaxy in the constellation Coma Berenices

IC 3528 is spiral galaxy located 660 million light-years away in the constellation of Coma Berenices. It lies near to another spiral galaxy NGC 4540, although the two of them are quite far. The object was discovered by Royal Harwood Frost on May 7, 1904. Although listed as a member in the Virgo Cluster Catalogue as VCC 1593, it is not a member of the Virgo cluster but a background galaxy.

<span class="mw-page-title-main">NGC 5495</span> Very large barred spiral galaxy in the constellation Hydra

NGC 5495 is a very large barred spiral galaxy located in the constellation Hydra. Its speed relative to the cosmic microwave background is 6,989 ± 20 km/s, which corresponds to a Hubble distance of 103.1 ± 7.2 Mpc. NGC 5495 was discovered by British astronomer John Herschel in 1834.

<span class="mw-page-title-main">IC 485</span> Spiral galaxy in the constellation Gemini

IC 485 is a spiral galaxy located in the constellation of Gemini, located 375 million light years from Earth. It was discovered by the Austrian astronomer, Rudolf Spitaler on March 6, 1891. It has an estimated diameter of 1.35' x 0.32' arcmin, meaning the galaxy is about 135,000 light years across.

<span class="mw-page-title-main">IC 860</span> Galaxy in the constellation of Coma Berenices

IC 860 is a barred spiral galaxy in the constellation of Coma Berenices. It is located 155 million light years away from Earth. It was discovered on June 16, 1892, by Stephan Javelle, a French astronomer. It is a peculiar galaxy.

<span class="mw-page-title-main">IC 4687</span> Spiral galaxy in the constellation Pavo

IC 4687 known as IRAS 18093-5744 or F18093-5744, is an Sb spiral galaxy located in the constellation of Pavo. It is located 250 million light years from Earth and was discovered by Royal Harwood Frost on August 1, 1904, who described the object "as brighter middle with magnitude of 14. It has a surface brightness of 12.5.

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

IRAS 19254-7245, more commonly referred as the "Superantennae", are a pair of interacting galaxies located in the constellation of Pavo. It is located 820 million light years from Earth. It is an ultraluminous infrared galaxy and a Seyfert galaxy.

<span class="mw-page-title-main">Markarian 1018</span> Galaxy in the constellation Cetus

Markarian 1018, also known as UGC 1597, is a lenticular galaxy with a peculiar structure located in the constellation Cetus. It is located at an approximate distance of 607 million light years from Earth and has an apparent dimensions of 0.99 by 0.52 arcmin. It is classified as a change looking Seyfert galaxy and galaxy merger.

References

  1. ↑ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2024-09-24.
  2. ↑ "Index Catalog Objects: IC 1450 - 1499". cseligman.com. Retrieved 2024-09-24.
  3. ↑ "Revised IC Data for IC 1481". spider.seds.org. Retrieved 2024-09-24.
  4. 1 2 3 4 Mamyoda, Koichi; Nakai, Naomasa; Yamauchi, Aya; Diamond, Philip; HurÉ, Jean-Marc (2009-10-25). "Detection of a Sub-Keplerian Water Maser Disk at the Active Galactic Nucleus of the Galaxy IC 1481". Publications of the Astronomical Society of Japan. 61 (5): 1143–1151. doi:10.1093/pasj/61.5.1143. ISSN   2053-051X.
  5. ↑ Bennert, N.; Schulz, H.; Henkel, C. (2004-05-01). "Spectral characteristics of water megamaser galaxies. II. ESO 103-G035, TXS 2226-184, and IC 1481". Astronomy and Astrophysics. 419: 127–137. arXiv: astro-ph/0403247 . Bibcode:2004A&A...419..127B. doi:10.1051/0004-6361:20034497. ISSN   0004-6361.
  6. ↑ Huchra, J.P.; Wyatt, W.F.; Davis, M. (1982). "New Seyfert Bright Galaxies". The Astronomical Journal. 87: 1628. Bibcode:1982AJ.....87.1628H. doi:10.1086/113254 . Retrieved 2024-09-24.
  7. ↑ Thomas, Adam D.; Dopita, Michael A.; Shastri, Prajval; Davies, Rebecca; Hampton, Elise; Kewley, Lisa; Banfield, Julie; Groves, Brent; James, Bethan L.; Jin, Chichuan; Juneau, Stéphanie; Kharb, Preeti; Sairam, Lalitha; Scharwächter, Julia; Shalima, P. (2017-09-01). "Probing the Physics of Narrow-line Regions in Active Galaxies. IV. Full Data Release of the Siding Spring Southern Seyfert Spectroscopic Snapshot Survey (S7)". The Astrophysical Journal Supplement Series. 232 (1): 11. arXiv: 1708.02683 . doi: 10.3847/1538-4365/aa855a . ISSN   0067-0049.
  8. ↑ C Keel, William; Moiseev, Alexei; Kozlova, DV (2022). "The TELPERION survey for distant [O iii] clouds around luminous and hibernating AGN". Oxford Academic. 510 (3): 4608–4625. arXiv: 2112.07084 . doi: 10.1093/mnras/stab3656 .
  9. ↑ Huré, J.-M.; Hersant, F.; Surville, C.; Nakai, N.; Jacq, T. (2011-06-01). "AGN disks and black holes on the weighting scales". Astronomy & Astrophysics. 530: A145. arXiv: 1104.2457 . doi:10.1051/0004-6361/201015062. ISSN   0004-6361.
  10. ↑ "SN 2000ey". Transient Name Server. IAU . Retrieved 25 September 2024.
  11. ↑ Bishop, David. "Bright Supernovae - 2000, entry for SN 2000ey". Rochester Astronomy. Retrieved 25 September 2024.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.